Unit 1.Introduction to Measurement System and Unit 2.Static Characteristics 1. Complete solution of any mechanical engineering design problem requires a. Empirical method b. Rational method c. Experimental Method *d. All of the above 2. Indirect method of measurement incorporates a. Zero translation b. One Translation c. Two translation *d. b and c both 3. Which measurement instrument is an example of Primary measurement? a. Thermometer b. Pressure Gauge *c. Meter Rod d. Voltmeter 4. Which measurement instrument is an example of Tertiary measurement? a. Vernier Caliper *b. Bourdons Tube Pressure Gauge c. Thermometer d. Steel rule 5. Which measurement instruments are so constructed that the quantity being measured can only be measured by observing the output indicated by the instrument? a. Absolute Instruments *b. Secondary Instruments c. A and b both d. None of the above 6. Signal that vary in a continuous fashion and take on an infinite number of values in any given range are called? a. Digital Signals *b. Analog Signals c. Independent Signals d. Dependent Signals 7. The last digit of any digital number in Digital Instruments is rounbed to which value of the last digit? a. +-1.0 b. +-5.0 *c. +-0.5 d. +-1.5 8. A measurement instrument is expected to perform a. Indicating function b. Recording function c. Controlling function *d. All of the above
9. A generalized measurement system has which basic element? a. Variable Conversion element b. Data presentation element c. Primary sensing element *d. All of the above 10. The measurement of a quantity is a. An act of comparison of an unknown quantity whose accuracy may be known or may not be known *b. An act of comparison of an unknown quantity with another quantity c. An act of comparison of an unknown quantity with a predefined acceptable standard which is accurately known d. None of the above 11. In present day measurement systems a. Direct methods are commonly used *b. Use of direct methods is limited but indirect methods are commonly used c. Both direct and indirect methods are commonly used d. All of the above 12. In an intelligent information system used for the measurement of a physical quantity *a. The digital computer must perform all or nearly all the signals and information processing b. The observer must perform all or nearly all the signals and information processing c. The digital computer is required d. None of the above 13. In a generalized measurement system, the function of the signal manipulating element is to *a. Change the magnitude of the input signal while retaining its original identity b. To perform linear operations like addition and multiplication c. To perform non-linear operations like filtering, chopping and clipping and clamping d. None of the above. 14. A modifying input to a measurement system can be defined as an input – a. Which changes the I/p – o/p relationship for desired inputs only *b. Which changes the I/p – o/p relationship for desired as well as interfering inputs. c. Which changes the I/p – o/p relationship for interfering inputs only d. None of the above 15. Purely mechanical instruments cannot be used for dynamic measurements because they have a. High inertia b. Large time constant c. Higher response time *d. All of the above 16. The usage of electronic instruments is becoming more extensive because they have a. A high sensitivity and reliability b. A fast response and compatibility with digital computers c. The capability to respond to signals from remote places *d. All of the above
17. In a measurement instrument which of the following characteristics is essential? a. Zero Drift *b. Accuracy c. Static Error d. Loading effect 18. In a measurement system which of the following are undesirable characteristics a. Sensitivity and Accuracy b. Reproducibility and Linearity *c. Drift, static error, dead zone and loading effect d. Accuracy and hysteresis 19. A pressure measurement instrument is calibrated between 10 bar and 250 bar. What is its scale span? a. 10bar b. 250bar *c. 240bar d. 260bar 20. Accuracy is a. True value *b. Closeness to true value c. Precise value d. Exact value 21. Which of the following sentence is acceptable? *a. A process can be accurate as well as precise b. A process may not be accurate but can be precise c. A process may be accurate but not precise d. All of the above 22. Loading effect occurs mostly at *a. detector – transducer stage b. Intermediate transducer stage c. Signal conditioning stage d. Data presentation stage 23. Hysteresis in a system arises due to the fact that all the energy put into the stressed parts when loading a. Is recoverable upon unloading b. Is recoverable upon loading *c. Is not recoverable upon unloading d. Remains constant 24. Deflection factor is the ratio of a. Change in output to change in input *b. Change in input to change in output c. None of the above d. A and B both
25. Linearity is when *a. Output is linearly proportional to input b. Output is inversely proportional to input c. Input is linearly proportional to output d. Input is inversely proportional to output 26. Reproducibility considers measurement when there is a. Change in method of measurement b. Change in measuring instrument c. Change in ambient conditions *d. All of the above 27. Accuracy as “percentage of scale range” can be expressed when a. Scale multiplier is not a fixed constant b. Scale range is large c. Scale span is large *d. Scale range is uniform 28. Static error is defined as a. Ratio of measured value to true value b. Ratio of true value to measured value *c. Difference between measured value to true value d. Difference between true value to true value 29. static Correction is given as a. Ratio of static error to true value b. Ratio of true value to measured value c. Difference between measured value and true value *d. Difference between true value and measured value 30. Relative static error is defined as a. Ratio of static error to true value *b. Ratio of absolute error to true value c. Difference between measured value and true value d. Difference between true value and true value 31. Characteristics which vary with time are *a. Dynamic Characteristics b. Static Characteristics c. Static Calibration d. None of the Above 32. The incapability of a measurement system to faithfully measure, record, or control the input signal in undistorted form is called a. Threshold b. Hysteresis c. Zero drift *d. Loading effect
33. Largest change of input quantity for which there is no output change is called a. Dead time b. Threshold *c. Dead zone d. None of the above 34. The minimum value of input below which no change in output is detected is a. Hysteresis *b. Threshold c. Static error d. Point accuracy 35. The magnitude of the impedance of an element connected across the Signal Sourse is called *a. Input impedance b. Output impedance c. Equivalent impedance d. Generalized impedance 36. Drift that occurs only over a portion of span of an instrument is called a. Zero drift b. Span drift *c. Zonal drift d. Combined zero and span drift 37. If there is proportional change in the indication all along the upward scale it is a. Zero drift *b. Sensitivity drift c. Zonal drift d. None of the above 38. Distortion of original signal may take the form of a. Attenuation b. Waveform distortion c. Phase shift *d. All of the above 39. Extraction of energy from a system results due to a. Insertion of primary elements b. Insertion of auxiliary elements *c. Insertion of both primary and auxiliary elements d. None of the above 40. The non-coincidence of output when the input is increased and then decreased is on account of? *a. Internal friction or hysteresis damping b. No friction c. External friction d. Internal as well as external friction
41. which type of measurement is used as a design tool in research and developement areas. *a. Mechanics type b. Power type c. Dynamic type d. Static type 42. Direct method of measurement incorporates *a. Zero translation b. One Translation c. Two translation d. b and c both 43. Which measurement instrument is an example of Secondary Indirect measurement? *a. Thermometer b. Bourdons tube Pressure Gauge c. Meter Rod d. Steel rule 44. Which measurement instrument is an example of Tertiary measurement? a. Vernier Caliper b. Steel rule c. Thermometer *d. Bourdons Tube Pressure Gauge 45. Which measurement instruments are so constructed that the quantity being measured can only be measured by observing the output indicated by the instrument? a. Absolute Instruments b. Direct Istruments c. A and b both *d. Secondary Instruments 46. Signal that vary in descrete steps and take up finite number of values in any given range are called? *a. Digital Signals b. Analog Signals c. Independent Signals d. Dependent Signals 47. Reproducibility is a. Point Accuracy b. Closeness to true value *c. Closeness to output for same input d. Exact value 48. Which Instruments are very reliable for Static and Stable conditions. *a. Mechanical Instruments. b. Electrical Instruments. c. Electronic Ihnstruments. d. Electromechanical Instruments.
49. Absolute measurement instrument use which method of measurement *a. Direct Method b. Indirect Method c. Power type measurement d. mechanics type measurement 50. A transducer is defined as a device which converts a. A analog signal into digital signal *b. A physical quantity into an electrical signal c. Measurand quantity into response d. None of the above 51. Gearing arrangement in a Bourdon's Tube Pressure gauge acts as a. Data transmission element b. Data presentation element *c. Signal conditioning element d. Variable Conversion element 52. When the elements of an instrument are actually physically seperated, the data is transmitted through *a. Data transmission element b. Primary sensing element c. Variable manipulation element d. Indicating element. 53. For a digital transmission system a. Analog signals are preffered *b. Digital Signal are preferred c. Interfering inputs are preffered d. Opposing inputs are preffered 54. Non-coincedence of loading and unloading curves is a. signal distortion b. Attenuation c. Phase shift *d. Hysteresis 55. Generalized input impedance is defined as the ratio of a. Undisturbed value to Trough variable b. Across Variable to Through variable c. Measured Value to across variable *d. Through variable to across variable 56. Threshold occurs due to *a. Input Hysteresis b. Loading Effect c. Output Hysteresis d. Backlash
57. Characteristics which involve use of differential equations are a. Primary Characteristics b. Static Characteristics *c. Dynamic characteristics d. Absolute Characteristics 58. Which Instruments are very reliable for Static and Stable conditions. a. Electronic Ihnstruments. b. Electrical Instruments. *c. Mechanical Instruments. d. Electromechanical Instruments. 59. For a thermometer having a caliberation of -40 degree celcius to 400 degree celcius, scale span is a. 400 degree celcius b. 40 degree celcius *c. 440 degree celcius d. 360 degree celcius 60. Characteristics which involve use of differential equations are *a. Dynamic characteristics b. Static Characteristics c. Primary Characteristics d. Absolute Characteristics 61. Threshold occurs due to a. Loading Effect *b. Input Hysteresis c. Output Hysteresis d. Backlash 62. Generalized input impedance is defined as the ratio of *a. Through variable to across variable b. Across Variable to Through variable c. Measured Value to across variable d. Undisturbed value to Trough variable 63. Variable manipulation element and data presentation element are together called as a. Signal conditioning stage b. Detector transducer stage c. Variable convertion stage *d. Intermediate stage 64.Static error is equal to *a. absolute static error b. relative static error c. static correction d. deflection factor
65. Accuracy as “percentage of scale range” can be expressed when a. Scale multiplier is not a fixed constant *b. Scale range is uniform c. Scale span is large d. Scale range is large
Unit 3.Detector Transducer 1.A transducer converts a.mechanical energy into electrical energy b.mechanical displacement into electrical signal *c.one form of energy into another form of energy d.electrical energy into mechanical form 2.An inverse transducer converts *a.electrical energy into any other form of energy b.electrical energy to light energy c.mechanical displacement into electrical signal d.electrical energy to mechanical form 3.One of the following can act as an inverse transducer a.electrical resistance potentiometer b.L.V.D.T. c.Capacitive transducer *d.piezoelectric crystals 4.One of the following is an active transducer a.strain gauge b.selsyn *c.photovoltaic cell d.photo emissive cell 5.A strip chart recorder is a.an active transducer b.an inverse transducer c.an output transducer *d.an inverse and output transducer both 6.In a transducer, the experimentally obtained transfer function is different from the theoretical transfer function, the errors result from this difference are called a.zero error b.sensitivity error *c.non-conformity error d.hysteresis error 7.A transducer has an output impedance of 1 kilo-ohm and the load resistance is 1 Mega-ohm,the transducer behaves as a.a constant current source *b.a constant voltage source c.a constant power source d.none of the given options 8..A transducer has an output impedance of 1 kilo-ohm and the load resistance is 1 ohm,the transducer behaves as *a.a constant current source b.a constant voltage source c.a constant power source
d.none of the given options 9.In a transducer,the observer output deviates from the correct value by a constant factor the resulting error is called a.zero error *b.sensitivity error c.non-conformity error d.hysteresis error 10.The lower limit of useful working range of transducer is determined by a.mimimum useful input level *b.by transducer error and noise c.cross sensitivity d.dynamic response 11.A resistanbe potentiometer is a a.first order instrument *b.zero order instrument c.secondorder instrument d.none of the given options 12.In a resistance potentiometers, the non-linearity a.increases with increase of load to potentiometer resistance *b.decreases with increase of load to potentiometer resistance c.in not dependent upon load to to potentiometer resistance d.none of the given options 13.In wire wound strain gauges,the change in resistance on application of strain is mainly due to a.change inlength of wire b.change in diameter of wire *c.change in both length and diameter of wire d.change in resistivity 14.Unbonded strain gauges are *a.exclusively used for transducer applications b.exclusively used for stress analysis c.commonly used for both transducer applications as well as for stress analysis d.none of the given options 15.Metal foil type of strain gauges are superior to wire wound metal strain gauges because a.they have a higher heat dissipation capacity b.they have a larger surface area which makes bonding easier c.they can be fabricated economically using techniques which are similar to those used for fabrication of microelectronic circuitry *d.all of the given options 16.Metal foil gauges use fat end turns in order to *a.reducetransverse sensitivity b.reduce lomgitudinal sensitivity c.reduce cross sensitivity d.all of the given options
17.In a semi-conducter strain gauges, the change in resistance on application of strain is much a.higher than that of metal strain gauges and this is mainly due to change in dimensions *b.higher than that of metal strain gauges and this is mainly due to change in resistivity c.lower than that in the case of metal strain gauges d.none of thegiven options 18.The RTDs use the principle of change of resistance with temperature.The properties of a conducter material to be used as an element of an RTD should possess the following properties a.the change in resistance per unit change in temperature should be as small as possible b.the resistance of the materials should not have a continous and stable relationship with temperature c.the change in resistance with temperature should not be a linear function *d.none of the given options 19.Platinum is the commonly used metal for RTDs because a.platinum has a constant value of resistance temperature co-efficient of 0.004/degree celcius for a temperature range between 0 to 100 degree celcius b.the resistivity of platinum tends to increase less rapidly at higher temperatures c.platinum is available in pure form for commercial applications and has a stability over higher ranges of temperature *d.all of the given opyions. 20.The sensitivity of thermistors as compared with sensitivity of platinum RTD over a temperature range of 100 to 400 degreecelcius to changes in temperature is a.100 times *b.10^6 times c.10^7 times d.10^3 times 21.A thermister exibits a.only a negative change of resistance with increase in temperature b.only a positive change of resistance with increase in temperature *c.can exibit a negative or positive change of resistance with increase of temperature depending upon the type of material used d.none of the given options 22.The temperature transducers exibit non-linear behaviour.The order in which they exibit nonlinearity(highest to lowest) is a.thermocouples, RTD, Thermistors *b.thermistors, thermocouples, RTDs c.RTDs, thermocouples. thermisters d.thermistores, RTDs, thermocouples 23.Three types of temperature transducers are compared as regards their sensitivity.The order in which they exhibit their sensitivities (highest to lowest) is *a.thermistors, RTDs, thermocouples b.thermocouples, RTD, Thermistors c.RTD, Thermistor,thermocouples d.RTDs, thermocouples. thermisters
24.Thermocouples are a.passive transducers *b.active transducers c.both active and passive transducers d.output transducers 25.Thermocouples a.are most commonly used temperature transducers b.require reference junction compensation c.have a low output voltage level *d.all of the given options 26.Air cored inductive transducers are suitable for use a.at lower frequencies *b.at higher frequencies c.at equal frequencies d.as are employed for iron cored transducers 27.The size of air cored transducer as compared with their iron cored counterparts is a.smaller *b.bigger c.same d.all of the given options 28.Inductive transducers are used in differential configuration because the output is not influenced by a.external magnetic fields b.temperature changes c.variations of supply voltage and frequency *d.all of the given options 29.In an L.V.D.T, the two secondary windings are connected in differential to obtain a.higher output voltage b.an output voltage which is phase sensitive i.e. the output voltage has a phase which can lead us to a conclusion whether the displacement of the core took place from left to right c.in order to astablish the null or the reference point for the displacement of the core *d.all of the given options 30.In LVDT core is made up of a a.non-magnetic material b.a solid ferro-electric material *c.high permeability, nickel-iron hydrogen annealed material in order to produce low harmonics,low null voltage and high sensitivity.the core is slotted to reduce eddy current losses d.allof the given options 31.An LVDT a.Exibits linear characteristics upto a displacement of +- 5mm b.has a linearity of 0.05% c.has an infinite resolution and a high sensitivity which is of the order of 40 V/mm *d.all of the given options
32.An LVDt a.has very good frequency response as the mass of the core to which the input signal is applied,is fairly large b.is immune to stray magnetic fields c.has a zero voltage at the null point even if the supply voltage contains and harmonics and even if the two secondary windings are not exactly similar and even assymmetrically placed with respect to primary windings *d.none of the given options. 33.Capacitive transducers are normally used for a.static measurement *b.dynamic measurement c.both static and dynamic measurement d.transient measurement. 34.The dynamic characteristics of capacitive transducers are similar to those of a.low pass filters *b.high pass filters c.notch filters d.band stop filters 35.A capacitive transducer working on the principle of change of capacitance with change of displacement, exibits non-linear characteristics.the response of these transducers can be made linear by using a.differential arrangement b.use of an OPAMp(operational amplifier) *c.working them over a small displacement range d.all of the given options 36.Capacitive transducer can be used for measurement of liquid levels.the principle of operation used in this case is a.change in capacitance with change of distance between plates b.change of area of plates *c.change of dielectric strength d.none of the given options 37.What is the order of minimum displacement that can be measured with capacitive transducer? a.1 cm b.1 mm *c.1 um d.1x10^-12 m 38.The capacitive transducer have a high output impedance and, therefore, a.to reduce loading effects long lengths of cable should be used b.to increase the value of resonant frequency long lengths of cables should be used c.long cable lengths should be used in conjunction with capacitive transducers in order to improve their frequency response *d.none of the given options 39.Ceramic materials are used for piezoelectric transducers a.they are polycrystalline in nature b.they are basically made of barium titanate c.they do not have piezo-electric properties in their original state but these properties are produced by special polarizing treatment
*d.all of the given options 40.Quartz and Rochell salt belong to *a.natural group of piezo-electric materials b.synthetic group of piezo-electric materials c.can belong to natural or synthetic group of piezo-elctric materials provided properly polarized d.all of the given options 41.Piezo-elctric transducers are a.passive transducers b.active transducers c.inverse transducers *d.active and inverse transducers 42.A photvoltaic cell is connected across a very large value of resistance, its sensitivity at higher illumination levels is typically a.infinity b.zero c.some finite value which is very large *d.some finite value which is very small and nears zero 43.Which of the following photo-electric devices is most suitable for digital applications a.photo-emmisive cell b.photo-diode c.photo transistor *d.photo-voltaic cell 44.Which of the photo-electric trabsducer is used for production of elctric energy by converting solar energy a.photo-emmisive cell b.photo-diode c.photo transistor *d.photo-diode and photo transistor 45.Which of the following optical transducers is an active transducer a.photo emissive cell b.photo diode c.photo transistor *d.photo voltaic cell 46.A cadmium sulphide cell has the highest response for a light of wavelength of mearly a.300 mm b.800 mm *c.500 mm d.600 mm 47.A photo diode function as *a.photo conductive device while working with reverse voltage b.photo voltaic device while working without a reverse voltage c.photo voltaic device while working with or without a reverse voltage d.none of the given options 48.The photo diode as compared to a transistor has
a.faster switching time b.lower sensitivity c.higher size for the same value of output current *d.all of the given options 49.A photoconduvtive cell is useful for a.high frequency applications b.medium frequency applications *c.low frequency application d.all of the given options 50.A linear displacement transducer (digital) normally uses a.straight binary code b.BCD *c.Gray code d.Hexadecimal code 51.A tachometer encoder can be used for measurement of displacement a.in both the directions *b.in only one direction c.its output pulses are counted only for the forward direction d.its output pulses are counted only for the reverse direction 52.Incremental counters use a.one channel b.two channels *c.two channels and sometimes three d.none of the given options 53.Absolute Encoders are used for *a.normally one revolution b.continous speed c.continous speed in both the directions d.none of the given options 54.Absolute encoders are used where a.fast varying signals are not used b.when position data is to be recovered even after a temporary power outage c.transient noise can be tolerated as it causes only a transient disturbance *d.all of the given options 55.Moire Fringes are used for measurement of rotary displacement along with a.only contact type encoders *b.only optical encoders c.both contact type and optical encoders d.none of the given options
Unit. 5.Methods of measurement a.Pressure Measurement 1.Bellows type of pressure gauges have the advantage of *a.they can be used for low,medium and high pressures b.they can be used for measurement of dynamic pressures c.they do not need any temperature compensating devices d.drift and hysteresis allow their use in applications having +-2% of full span accuracy 2.The disadvantages of strain gauge pressure transducer are a.They have a poor frequency response b.They do not have a continous resolution c.They cannot be powered by a.c. sources *d.They have a low output 3.Which of the following types of Bourdon tube shapes has a small tip travel and nevessitates amplification? *a.C-type b.Spiral c.Helical shaped d.round 4.Manometers measure unknown pressure by a.measuring liquid levels b.measuring height of liquid columns *c.balancing the unknown force produced by pressure against a known force d.noting the deflection of a pointer 5.In thermal conductivity gauges,the major source of error is heat lost on account of *a.radiation b.conduction c.convection d.both conduction and reduction 6.The desirable property of manometric fluid is a.High viscosity b.high co-effecient of thermal expansion *c.low vapour pressure d.corrosiveness and sickness 7.The advantages of manometer are *a.higher accuracy,repeatibility,wide range of filling liquids and their ability to work as primary standards b.fragility and probability c.ability to work in hazardous environments d.ability to work under all conditions and at all altitudes 8.Piezometer is used for measuring *a.gauge pressure b.vaccum c.absolute pressure d.pressure differences between two fluids
9.A U-tube differential manometer is used inverted when *a.pressure difference is small b.pressure difference is large c.cannot be used inverted d.no pressure difference 10.A typical piezoelectric pressure transducer has a range of a.0 to 10 kpa b.0 to 100 kpa c.0 to 700 kpa *d.0 to 20 kpa 11.In thermocouple gauges, the temperature of heated strip lies between a.0 to 100 degree celcius *b.50 to 400 degree celcius c.200 to 1000 degree celcius d.10 to 50 degree celcius 12.In order to avoid errors on account of changes in ambient temperature Pirani gauges a.are enclosed in temperature controlled chambers *b.use one active and one dummy element c.use bridge measuring circuits d.none of the given options 13.Vaccum pressure is a.equal to gauge pressure b.equal to atmospheric pressure *c.lower than atmospheric pressure d.equal to absolute pressure 14.Velocity pressure is difference between a.dynamic pressure and static pressure *b.stagnation pressure and static pressure c.impact pressure and dynamic pressure d.impact pressure and stagnation pressure 15.A well-type manometer is used in preference to a simple U-tube manometer to obtain a.better accuracy b.better precision c.a constant zero *d.higher sensitivity 16.Which of the following cannot be used for negative pressures *a.piezometer b.Pirani gauge c.U-tube manometer d.Bourdon gauge
17.The accuracy of dead weight tester is affected by a.friction force b.uncertainity of the value of effective area of piston c.uncertainity of the value of gravitational constant *d.all of the given reasons 18.Signal conditioning is carried out by the capillary tubes which convert gas pressure into a mercury height.This statement pertains to a.bourdon tube pressure gauge b.pireni gauge *c.McLeod gauge d.diaphragm pressure transducer 19.The angular error in a Bourdon tube refers to a.pointer or hand becomes loose on the spindle b.gauge tends to give a progressively higher or lower reading *c.gauge reads correctly both at maximum and minimum readings but gives an inaccurate reading at the mid point d.any of the given options 20.McLeod gauge a.can be used for pressure below 0.1x10^-3 torr b.gives continous output *c.is sensitivity to condensed vapours that may be present in the sample of the gas whose pressure is being measured d.cannot be used as standard for vaccum measurement 21.Inductive pressure transducer a.have poor dynamic response *b.have high sensitivity c.are sensitive to vibrations d.none of the given option 22.Pressure transducer using LVDT have *a.poor dynamic response b.linear response over a large range c.low sensitivity d.all of the given options 23.Unit of Vaccum pressure is a.bar b.N/m^2 *c.torr d.kg/cm^2 24.At standard conditions One torr is equal to a.10 mm of Hg b.760 mm of Hg c.-1 mm of Hg *d.1 mm of Hg
25.Which is the odd man out from below a.Pirani gauge b.Thermal conductivity gauge *c.Bourdon tube pressure gauge d.Piezoelectric pressure gauge 26.Elastic pressure elements are used for measurement of very high pressures upto about a.1000 MN/m^2 *b.700 MN/m^2 c.1000 N/m^2 d.100 N/m^2 27.Disadvantage of Bourdon tubes are *a.low spring gradient b.elliptical cross-section c.sector-pinion mechanism d.high sring gradient 28.Arc of C-type Bourdon tube is a.150 degree *b.250 degree c.50 degree d.180 degree 29.The absence of geared sector and pinion arrangement in Spiral Bourdon tube pressure gauge eliminates a.Hysteresis b.drift *c.backlash d.static loading 30.The minimum and maximum number of coils employed in Helical BOURDON TUBE PRESSURE GAUGE are a.1 and 10+ b.12 and 40+ c.9 and 11+ *d.3 and 16+ 31.Bellows used in pressure gauges are a.tough and made by machining *b.seamless and made from drawn tubing by hydraulic or other methods of rapid forming c.welded together d.used for temperature measurement 32.Which of the following type of mechanical transducer have caliberated spring a.Bourdon tubes b.manometers c.diapragms *d.bellows
33.Bellows are filled with liquids like a.ethyl alcohol *b.ethylene glycol or water c.brine solution d.mercury 34.As the pressure of gas becomes smaller and smaller , the mean free path of the molecules becomes a.slow b.small c.null *d.greater 35.Average distance a molecule travels between collisions is called a.dead zone b.lead time *c.mean free path d.pertinent dimension 36.The temperature of the heated strip lies between *a.50 to 400 degree celcius b.100 to 400 degree celcius c.1 to 100 degree celcius d.0 to 400 degree celcius 37.Dead weight tester is a.pressure measurement instrument *b.pressure gauge calliberation instrument c.weight measurement instrument d.force measurement instrument 38.Vaccum pressure gauges are used to measure *a.pressure below atmospheric pressure b.only atmospheric pressure c.pressure above atmospheric pressure d.pressure below 10 kg/cm^2 39.Most commonly used crystal for piezoelectric transducer is a.ceramic b.lead c.dipotassium tartarate *d.Quartz 40.Materials used for Diaphragm include a.Rochell salts and Quartz b.ceramics *c.phospor bronze and stainless steels beryllium copper d.lithium sulphate
b. Temperature Measurement 1.In pressure thermometers when mercury is used, the bulb capillary should be made of a.copper b.alloys of copper *c.stainless steel d.none of the above 2.Partial immertion Liquid-in-glass thermometers give errors because a.thermometer is not fully immerersed b.the temperature of the emergent portion is higher than that of the immersed portion. c.the temperature of the emergent portion is lower than that of the immersed portion. *d.the temperature of the emergent portion is different from that of the immersed portion. 3.Mercury is used in liquid filled thermometers as it gives a.wide temperature range b.high sensitivity *c.wide temperature range and approximately linear scale d.wide temperature range and high sensitivity 4.For the same temperature range, the volume of bulb of a gas filled thermometer is, *a.greater than that of a liquid filled or a vapour filled thermometer b.smaller than that of a liquid filled or a vapour filled thermometer c.greater than that of a liquid filled but lesser than that of vapour filled thermometer d.lesser than that of a liquid filled but greater than that of vapour filled thermometer 5.In filled systems used for temperature measurement, full compensation is used for compensating for effect of a.changes in ambient temperature, head and baromeric pressure b.changes in ambient temperature, where the receiving element is located *c.changes in ambient temperature, where both the receiving element and the capillary tube are located. d.all of the above 6.RTD's present no problem in measurement of temperature because a.there are no errors caused by resistance of leads when the resistance of elements is measured. b.they have a robust construction c.there are no self-heating effects when using them *d.none of the given options 7.Semi-conductor thermomrters have the disadvantage that they a.are not readily available and are expensive b.are fragile and have low sencitivity c.are large in size and have a poor frequency response *d.none of the given options 8.The advantages of thermistor are a.resistance of thermistor is high and therefore error due to resistance of leads is negligible b.errors due to self-heating are small c.their sensitivity is about 10^6 as high as that of plat6inum resistance thermometers. *d.all of the above
9.Law of intermediate metals in thermocouples allows them to a.use reference junction compensation b.use meters for measurement of emf without disturbing the circuit conditions c.use extension wires of materials other than the ones used for making thermocouples *d.use of both, meters as well as extension wires 10.Thermopile is *a.a combination of a number of thermocouples connected in series b.a combination of a number of thermocouples connected in parallel c.a combination of a number of thermocouples some of which are connected in series and some in parallel d.a combination of a number of thermocouples connected neither in series nor in parallel 11.Reference junction compensation in thermocouple can be provided through use of a.hardware only b.software only *c.both hardware and software d.neither harware nor software 12.The probes used for measurement of high speed flows measure *a.recovery temperature b.stagnation temperature c.static temperature d.none of the given options 13.Radiation pyrometers are used in the temperature range of a.0 to 500 degree celcius b.500 to 1000 degree celcius c.-250 to 500 degree celcius *d.1200 to 2500 degree celcius 14.Which of the following units are employed where it is not possible to have a physical contact with the system whose temperature is to be measured? a.thermocouples b.resistance thermometers *c.resistance pyrometers d.thermister 15.A parallel combination of thermoouples is used for measurement of a.small temperature differences between the two junctions b.large temperature differences between the two junctions *c.average temperature of a number of points d.none of the given options 16.In presuure thermometers when mercury is used, the bulb and capillary should be made of a.copper b.alloys of copper *c.stainless steel d.rubber 17.Partial immersion liquid-in-thermometers give errors because a.thermometer is not fully immersed b.the temperature of the emergent portion is higher than that of the immeresed portion
c.the temperature of the emergent portion is lower than that of the immeresed portion *d.the temperature of the emergent portion is different than that of the immeresed portion 18.Recording is not possible with *a.liquid-in-thermometers b.thermocouples c.filled in system thermometers d.all of the given options 19.Which metal/non-metal has the highest temperature range? a.semiconductor b.nickel c.copper *d.platinum 20.which arrangement has the null-balance operation? *a.optical pyrometer b.resistance thermometer c.liquid-in-glass thermometer d.bimetallic thermometer 21.In filled systems used for temperature measurement,full compensation is used for compensating the effect of? a.changes in ambient temperature,head and barometric pressure b.changes in ambient temperature where the receiving element is located *c.changes in ambient temperature where both the receiving element & the capillary tube are located d. all of the given options 22.The electrical output from a thermocouple circuit is detected by using a.Wheatstone bridge b.current sensitive device *c.voltage-balancing circuit d.RTD 23.Which arrangement has the capability to measure the temperature of an object which may be either stationary or moving? a.thermocouple b.thermister *c.Total radiation pyrometer d.filled-in-system thermometer 24.Self-compensating capillary tube is used in the filled-in-thermometer to eliminate or minimize a.elevation effect b.immersion effect c.barometric effect *d.temperature effect 25.Mercury is used in liquid-in-filled systems as it gives a.wide temperature range b.high sensitivity *c.wide temperature range and approximately linear scale d.wide temperature range and high sensitivity
26.In which thermometers; liquids,gases and vapours can all be used a.liquid in thermometers b.bimetallic thermometers *c.pressure thermometers d.gas filled thermometers 27.Radition Pyromrter have *a.high speed respone b.high surface response c.moderate speed response d.low speed response 28.A device which measures total intensity of radiation emitted from a body is called a.thermister b.Resistance temperature detector c.bimetallic thermometer *d.Radion Pyrometer 29.Thermistors have a.high speed respone *b.fast thermal response c.slow surface response d.moderate thermal response 30.The gases used in gas thermometers are a.neon and argon *b.nitrogen and helium c.oxygen and helium d.nitrogen and argon 31.Seebeck effect is *a.reversible in nature b.irreversible in nature c.constant d.stable 32.The resistance element response time is of the order of *a.2 to 10 seconds, depending on construction b.15 to 20 seconds, depending on construction c.0 to 10 seconds, depending on construction d.90 to 120 seconds, depending on construction 33.The reponse of thermometer becomes faster if a.partial area of bulb is exposed to the process fluid b.point contact of bulb with the process fluid c.no contact of bulb with process fluid *d.greater area of bulb is exposed to the process fluid 34.thermisters have a.low and positive temperature coefficient b.high and positive temperature coefficient
c.low and negative temperature coefficient *d.high and negative temperature coefficient 35.Absolute temperature is equal to a.thermometer reading in degree celcius *b.thermometer reading in degree celcius plus 273.15 c.thermometer reading in degree celcius plus 760 mm of Hg d.thermometer reading in degree celcius plus 273 36.When mercury is used in liquid-in-thermometer, temperature range for thermometer is *a.-38.9 to 600 degree celcius b.-130 to 36 degree celcius c.-100 to 78 degree celcius d.-92 to 110 degree celcius 37.Bimetallic thermometers are made with metals which have a.small difference in thermal expansion coeffients b.negligible difference in thermal expansion coeffients c.no difference in thermal expansion coeffients *d.widely different thermal expansion coeffients 38.The electrical output from a RTD circuit is detected by using *a.Wheatstone bridge b.current sensitive device c.voltage-balancing circuit d.ammeter 39.Mercury is generally used in a.low grade thermometers b.ambient grade thermometers *c.High grade thermometers d.medium grade thermometers 40.low grade thermometers use a.mercury b.invar c.copper *d.ethyl alcohol,pentane and toluene
c.Force and Torque Measurement 1.The term "method of symmetry" is used for a.measurement of weight by equal arm balances *b.checking of two sides of an equal arm balance for identical conditions on two sides of balance c.checking of two sides of an un-equal arm balance for identical conditions on two sides of balance d.none of the given options 2.In a balance with multi-lever system the unknown weight may be placed a.at any position on the platform and it will not effect the result b.at a particular position on the platform to get proper results *c.at any position on the platform subject to certain conditions and it will not affect the result d.at centre and it will affect the result 3.In an equal arm balance the buoyancy effects *a.cause lesser error if the unknown weights are made of materials having high density b.cause greater error if the unknown weights are made of materials having low density c.are independent of the density of materials d.are independent of the weight of materials 4.Eletromagnetic type of balances a.are more sensitive to environmental effects *b.give an output which can be used for display,recording and control c.are of large size and have slow response d.cannot be operated from a remote location 5.Hydraulic load cells are available which have a maximum capacity of a.10 KN b.50 KN c.10 MN *d.50 MN 6.Pendulum type of scales used for measurement of force work on the principle of a.comparing the unknown force with a known force b.converting the unknown force to power and cmparing it with known power *c.converting the unknown force to torque and cmparing it with known torque d.none of the given options 7.Elastic elements used for measurement of force give a.high sensitivity and slow response if they are stiff *b.low sensitivity and fast response if they are stiff c.low sensitivity and slow response if they are stiff d.low sensitivity and zero response 8.Piezoelctric type load cells can be used for measurement of a.dynamic forces only b.dynamic forces and static forces provided the load cells have a small time constant *c.dynamic forces and static forces provided that the load cells have a large time constant d.static forces only
9.Torque of a rotating shaft is measured by mounting a strain gauge bridge on the shaft.The supply to the bridge circuit is given to it and the output from it is taken from by using a.only slip rings b.only rotary transformers *c.slip rings,rotary transformers,telemetry equipement d.none of the given options 10.Unit of torque is *a.N-m b.N/m c.N d.N/m^2 11.Unit of force is a.N-m b.N/m *c.N d.N/m^2 12.Standard for force depends on standards of *a.mass and acceleration b.mass and velocity c.pressure and load d.mass and pressure 13.Which device is used for torque measurement being exerted along the rotating shaft so as to determine shaft power a.Tachometer b.Stroboscope *c.Dynamometer d.Scales 14.A sink is a.A transmission dynamometer b.A driving dynamometer *c.An absorption dynamometer d.Any Dynamometer 15.When the combination of strain gauge-elastic member is used for weighing, it is called a.Dynamometer *b.Load Cell c.Bridge Circuit d.None of the given options 16.The proving rings are steel rings used as a.velocity stantards b.pressure standards *c.Force standards d.temperature standards
17.The use of which scales(weighing balance) requires that the force should be steady for 2 to 3 seconds for the scale to come to rest a.Equal arm balance *b.Pendulum balance c.digital balance d.none of the given options 18.Pneumatic load cell operates on *a.force-balance method b.pressure-balance method c.mass-balance method d.weight-balance method 19.In which torsion meter the angular deflection of a parallel length of shaft is used to measure torque a.Electrical tortion meter b.straingauge tortion meter c.Optical tortion meter *d.Mechanical tortion meter 20.In which tortion meter four bonded-wires are mounted on a 45 degree helix with the axis of rotation; and are placed in pairs diametrically opposite a.Electrical tortion meter *b.straingauge tortion meter c.Optical tortion meter d.Mechanical tortion meter 21.Which tortion meter system uses two photoelectric or magnetic transducers, where a measure of time between pulses from two slotted disc generates a signal which is proportional to the angular twist theta *a.Electrical tortion meter b.straingauge tortion meter c.Optical tortion meter d.Mechanical tortion meter 22.For which load cell, on application of force the liquid pressure increases and equals the force magnitude divided by the effective area of the diaphragm a.Strain guage load cell b.Pneumatic load cell *c.Hydraulic load cell d.none of the given options 23.The strain-guage load cell find extensive use in a.Road vehicle weighing devices b.Draw ber and tool-force dynamometers c.Crane load monitoring *d.all of the given options 24.The use of foer identical strain gauges in each arm of the bridge provides full temperature compensation and also increases the sensitivity of the bridge by *a.2(1+u) times b.4(1+u) times c.2(4+u) times d.(1+u) times
25.Which scale is used for spring-testing devices because its accuracy permits tasting a wide range of springs with high accuracy a.Pendulum scale b.even-arm scale c.weighing maching *d.pendulum scale
d.Flow Measurement 1.Which of the following meter is used for measuring flow of clean fluids only? a.Ultrasonic flow meter b.Turbine Flow meter c.Laser doppler anomometer *d.Hot wire anemometer 2.Which of the following flow meters is capable of measuring the rate of flow as well as totalized flow? a.Nutating disc flow meter b.Electromagnetic flow meter c.orifice meter *d.Lobed impeller flow meter 3.Annubar tubes can be used for measurement of flow rates of a.liquids only b.gases only c.liquids and gases *d.liquids,gases and steam 4.The meter which is suitable for flow totalization is *a.turbine meter b.venturimeter c.ultrasonic flow meters d.orifice plate 5.The fluid flow between the electrodes of an electromagnetic flow meter generates an e.m.f which is a function of a.dynamic pressure b.discharge *c.flow velocity d.all ot the given options 6.The size of venturimeter is expressed as 300x150 mm. it means that a.the diameter of the upstream pipe is 300mm and that of downstream pipe is 150mm *b.the diameter of the pipe is 300mm and that of throat is 150mm c.the diameter od pipe is 150mm and that of throat is 300mm d.none of the given opions 7.Venturimeters have a.High head loss, low co-efficient of discharge and small size b.low head loss, low co-efficient of discharge and small size c.low head loss, low co-efficient of discharge and large size *d.low head loss, high co-efficient of discharge and large size 8.In an ultrasonic flow meter, the error caused by velocity of sound propogation in medium can be eliminated by a.measuring transit time b.measuring phase shift c.measuring difference of transit times in the direction of flow and against the direction of flow *d.measuring difference of frequency in the direction of flow and against the direction of flow
9.A pitot-static tube measures a.static pressure b.dynamic pressure c.total pressure *d.difference between total and static pressure 10.Which of the following instrument is a rate meter? *a.Venturimeter b.Weight meter c.Volumetric d.Quantity meter 11.A flow meter that measures flow rates which are independent of density is a.rotameter *b.variable area flow meter c.variable head flow meter d.rotating propellor type flowmeter 12.Of the various methods of measuring discharge through a pipeline, the one with the least loss of energy and direct readings is by means of a.transversing a pitot statictube b.oroficemeter c.notch *d.venturimeter 13.Variable head flow meters can be used for measurement of flow of a.liquids only b.liquids and gases c.slurries only *d.liquids,gases and slurries 14.Nozzels are useful for measurement of a.fluids which are clean b.fluids which are clean and may contain solids *c.fluids which are clean and may contain solids and also for high pressure/temperature steam d.fluids which are clean and may contain solids and also corrosive liquids 15.Pitot tubes produce a.large head loss,produce high differential pressure and have high sensitivity b.high head loss,produce low-differential pressure and have high sensitivity c.high head loss,produce low-differential pressure and have low sensitivity *d.low head loss,produce low-differential pressure and have low sensitivity 16.Rotameter is a a.drag force flow meter *b.variable area flow meter c.variable head floe meter d.rotating propellor type flow meter
17.The specific gravity of the float or bob material should be *a.Higher than that of the fluid to be metered b.Lower than that of the fluid to be metered c.Equal to that of the fluid to be metered d.none of the given options 18.When a liquid flows around a pipe bend which rate meter should be used a.Rotameter b.Nutating disc meter *c.Elbow meter d.Current meters 19.A weir, which is esentially a dam with a notched opening at the top through which the liquid flows makes use of a.Rectangular notch b.V-notch c.Tapezoidal Notch *d.All of the given options 20.Unit of discharge is a.m^2/sec *b.m^3/sec c.mm of mercury d.mm/sec 21.Which type of flow meters basically capture and release a fixed volume of fluid by some type of pumping action *a.Positive displacement flow meter b.mass measurement meters c.Inferential rate meters d.Thermal flow meters 22.Which device used for open flow measurement is an open channel whose sides are arranged sharply to form a throat, followed by a fairly long expansion section. a.weirs *b.venturi flume c.annubar tube d.pitot tube 23.Flow visualisation methods utilize which basic principles for their working a.introducton of tracer particles b.detection of changes in optical properties which are related to flow c.add a coloured dye to the liquid *d.all of the given options 24.Under ordinary conditions ,the transition zone for fluid flow is considered between, when a.Reynolds number is less than 2000 b.Reynolds number is more than 4000 *c.Reynolds number lies between 2000 to 4000 d.Reynolds number is zero
25.The size of venturimeter is expressed in terms of *a.inlet and throat diameters b.outlet and throat diameters c.only trhoat diameters d.convergent and divergent cone angles
e.Speed,Velocity and Acceleration measurement 1.Speed is a.Vector quantity *b.Scalar quantity c.time per unit distance d.force per unit distance 2.Velocity is *a.Vector quantity b.Scalar Quantity c.Change is acceleration d.force per unit distance 3.Acceleration is a.scalar quantity *b.change in velocity per unit time c.change in speed per unit time d.none of the given options 4.Unit of velocity is a.m/s^2 *b.m/s c.N-m d.meter 5.Unit of acceleration is *a.m/s^2 b.m/s c.N-m d.meter 6.Which measurement instrument either continously indicates the value of rotary speed or continously displays a reading of average speed over rapidly operated short intervals of time. a.Accelerometer b.Dynamometer *c.Tachometer d.Load Cell 7.Which Tachometers are preferred generally for better output a.Mechanical *b.Electrical c.Hand speed Indicators d.Tachoscope
8.Electromagnetic velocity transducer work on the assumption(s) a.the current in the exciting coil, if any, is constant b.the current in the exiting coil, if any, is constant and the average value of reluctance is considerably greater than variations in reluctance c.the current in the exciting coil, if any, is constant, the average value of reluctance is much greater than variations in reluctance and the reluctance of iron parts is negligible. *d.the current in the exciting coil, if any, is constant, the average value of reluctance is much greater than variations in reluctance, the mmf divided by square of reluctance is constant and the reluctance of iron parts is negligible 9.The sesmic type of velocity transducer can be used for measurement of a.linear velocity only b.acceleration only *c.linear velocity and acceleration d.none of the given options 10.In measurement of linear velocity by Doppler effect radio or ultrasonic beams are used.If the moving object is travelling towards the receiver *a.the frequency of the transmitted signal is lower than that of signal received back b.the frequencies of the transmitted signal and that of the signal received back are equal c.the frequency of the transmitted signal is greater than that of signal received back d.none of the given options 11.The mechanical tachometers should be used for measurement of angular speed of a.small machines having constant speed b.small machines having variable speed c.large machines having variable speed *d.of rotating shaft by registering the total number of revolutions per minute during the period of contact 12.Which of the following tachometer is a Mechanical Tachometer a.Capacitive Tachometer *b.Revolution counter and timer tachometer c.Stroboscopic tachometer d.D.C.Tachometer 13.Which of the following tachometer is an Electrical Tachometer *a.Photoelectric tachometer b.Vibrating reed tachometer c.Tachoscope d.Centrifugal Tachometer 14.Centrifugal tachometers are suitable to measure speeds upto a.1000 rpm *b.40000 rpm c.4000 rpm d.5000 rpm
15.Which tachometer employs a timing device and counts the number of revolutions in a measured length of time a.Drag-cup tachometer *b.Revolution counter and timer tachometer c.Capacitive Tachometer d.A.C.tachometer 16.Which tachometer works on the principle that centrifugal force is proportional to the speed of rotation a.Hand speed indicator b.Photoelectric tachometer c.Eddy current tachometer *d.Fly-ball tachometer 17.Which tachometer uses a series of consecutively timed steel rods to determine the speed on the basis of vibrations created by the machine. *a.Vibrating reed tachometer b.Photoelectric tachometer c.Drag-cup tachometer d.capacitive tachometer 18.In a D.C tachogenerator the e.m.f generated depends on a.field excitation b.shaft speed *c.field excitation and shaft speed d.voltage 19.The inherent demerits associated with D.C. tachogenerator are due to provision of a.Armature *b.commutator and brushes c.resistor d.permanent magnet 20.The number of pulses generated in a photoelectric tachometer depends on a.light source b.light sensor c.opaque disc *d.Number of holes in the opaque disc and shaft speed 21.If the number of holes on the opaque disc of photoelectric tachometer if fixed, the number of pulse generated will depend only on a.light source b.light sensor c.opaque disc *d.shaft speed 22.Automobile Speedometers operate on the principle of a.Photoelectric tachometer b.Stroboscopic tachometer *c.Eddy current od Drag-cup tachometer d.Capacitive tachometer
23.Which tachometer cannot be used where ambient lighting is above certain value; for it to be most effective, the surrounding light must be subdued. *a.Stroboscopic tachometer b.Centrifugal tachometer c.Eddy current od Drag-cup tachometer d.Photoelectric tachometer 24.Which accelerometer can also be used as Vibration sensor a.Piezoelectric accelerometer *b.seismic accelerometer c.Both Piezoelectric accelerometer and seismic accelerometer d.None of the given options 25.Which accelerometer work on the principle of Newton's second law of motion *a.Piezoelectric accelerometer b.seismic accelerometer c.Both Piezoelectric accelerometer and seismic accelerometer d.None of the given options 26.Which accelerometer senses displacement to give appropriate acceleration output a.Piezoelectric accelerometer *b.seismic accelerometer c.Both Piezoelectric accelerometer and seismic accelerometer d.None of the given options 27.Which accelerometer senses force exerted on mass and crystal to give appropriate acceleration output *a.Piezoelectric accelerometer b.seismic accelerometer c.Both Piezoelectric accelerometer and seismic accelerometer d.None of the given options 28.D.C tachometer generators are sometimes preffered over A.C. tachometer generators because a.it is possible to know the direction of rotation b.they present no maintenance problems *c.it is possible to know the direction of rotation and magnitude of speed with the help of a simple D.C. voltmeter d.all of the given options 29.A seismic transducer working in the displacement mode should be designed to have *a.weak springs and heavy mass b.weah springs and light mass c.stiff springs and heavy mass d.stiff springs and light mass 30.The advantage of Drag-cup rotor A.C. tachometer generator are a.the input voltage to the reference winding meed not be constant b.the frequency of voltage applied to the reference winding can be very low *c.they are rugged, inexpensive, require little maintenance and a ripple free putput voltage which is linearly proportional to the angular speed. d.they are easy to caliberate
