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Electrical Engineering Objective Questions 1. How is window space factor related to higher voltage rating of transformer? A. larger B. smaller C. not related D. none of the above 2. What is the effect of frequency variation on eddy loss in transformer core if voltage remains constant? A. remains constant B. becomes less C. becomes more D. none of the above 3. Tappings of a transformer are provided on A. at phase end of L.V. side B. at phase end of H.V. side C. at neutral end of H.V. side D. at middle of H.V. side 4. What is necessary to make connection of external circuit with windings? A. bushing B. conservator tank C. radiator D. none of the above 5. Turbo generator is a how many pole machine A. 2 B. 1 C. 3 D. 4 6. Important applications of dc motor are A. rolling mill B. traction C. both A and B D. neither A nor B 7. When the load power factor in a three phase short transmission line is leading, the voltage regulation is A. positive B. negative C. positive or negative D. zero
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Electrical Engineering Objective Questions 8. The capacitance effects of short transmission line is A. negligible B. high C. same as medium transmission line D. same as long transmission line 9. In nominal T method A. full charging current flows over full the line B. half charging current flows over the full the line C. full charging current flows over half the line D. half charging current flows over half the line 10. Which statement is false for long transmission line? A. The line constants are uniformly distributed over the entire length B. Leakage susceptance and leakage conductance are shunt conductance are series elements C. Resistance and inductive reactance are the series elements D. If a line is divided in n section, each section will have line constants n times of whole line 11. Which combination is true for short lines? A. A =1, B=Z, C=0, D=1 B. A=0, B=1, C= Z, D=1 C. A=1, B=1, C= Z, D=0 D. A=0, B=0, C=1, D=Z 12. In a DC transmission line A. there is no effects due to inductive and capacitive reactance B. the effects of inductive and capacitive reactance are greater than in an AC transmission line of the same rating C. it is necessary for the sending end and receiving end to be operated in synchronism D. power transfer capability is limited by stability considerations 13. For a 500 Hz frequency excitation, a 50 km long power line will be modeled as A. short line B. long line C. medium line D. data insufficiency for decision 14. The wound rotor type IM is used for ____________ speed operation. A. constant B. maximum C. minimum D. variable 15. Pole changing methods are suitable only for ___________ type induction motor. A. wound B. cage C. linear D. none of the above devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 16. In a three phase induction motor, in order to eliminate cogging the number of stator slots must be A. unequal to number of rotor slots and skewed in shape B. equal to number of rotor slots C. an integral multiple of number of rotor slots D. either B or C 17. _____________ types of Induction Motor are widely used. A. slip ring IM B. squirrel Cage IM C. single Phase IM D. three Phase IM 18. In an induction motor, the no-load slip is generally equal to A. 1.5% B. zero C. 4% D. less than 1% 19. Star-delta method of starting of motor is not possible in case of. A. high speed motor B. low horse power motor C. single phase Induction motor D. high torque motor 20. If s is the slip and f is the supply frequency of an induction motor, the frequency of rotor current is given by A. sf B. s2 C. sf/2 D. f/s 21. In case of IM, the torque is A. inversely proportional to √slip B. directly proportional to slip C. directly proportional to slip2 D. inversely proportional to slip 22. The torque developed in IM is nearly proportional to A. 1/V B. V2 C. V D. 1/V2 23. In case of three phase IM, plugging means A. pulling the motor directly on line without a rotor B. locking of rotor due to harmonics C. interchanging two supply phases for quick stopping D. starting the motor on load which is more than the rated load devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 24. When R2 is rotor resistance, X2 the rotor reactance at supply frequency and s the slip, then the condition for maximum torque under running condition will be. A. s R2=X2 B. R2= s2X2 C. R2= s2X2 D. R2=s X2 25. The principle of operation of a three phase IM is most similar to that of a. A. transformer with a shorted secondary B. repulsion start IM C. induction start motor D. synchronous motor 26. In a star-delta starting of an IM. A. reduced voltage is applied to the stator B. applied voltage per stator phase is 57.7% of a line voltage C. line voltage is 57.7% of stator voltage D. resistance is inserted in the rotor 27. A three phase induction motor can also be referred to as A. an asynchronous motor B. a transformer C. a repulsion motor D. a shunt motor 28. Which of the following methods of speed control is not affected through stator side? A. change of rotor resistance B. change of number of pole C. change of supply voltage D. change of supply frequency 29. The difference between the synchronous speed and rotor speed with respect to synchronous speed is known as A. slip B. number of poles C. normal speed D. none of the above 30. Which of the following is not determined by circle diagram? A. power factor B. frequency C. efficiency D. output
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Electrical Engineering Objective Questions 31. For a three phase transmission, line transmission efficiency of a line decreases with A. increase in load p.f. B. Does not vary with power factor C. increase in load current D. decrease in load p.f. 32. For a medium transmission line which one is true? A. D = 1 + YZ/2 B. C = 1 + YZ/2 C. B = 1 + YZ/2 D. A = 1 + YZ/2 33. Power system is protected from lightning by use of A. surge diverter B. earthing screen C. both A and B D. neither A nor B 34. When a neutral point of three phase system is directly connected to earth then it has what type of grounding? A. solid B. resistance C. reactance D. Peterson coil 35. In substations most commonly used arrestor is A. horngap B. thyrite C. rodgap D. multigap 36. Calorific value of solid fuel is expressed as A. kcal/gm B. cal/gm C. kcal/lt D. cal/lt 37. Percentage of carbon is highest in A. anthracite coal B. bituminous coal C. lignite D. coal gas 38. Cheapest plant in operation and maintenance is A. steam power B. diesel power C. nuclear D. hydroelectric devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 39. What are the types of lightning arresters? A. horn gap B. rod gap C. expulsion type D. all of the above 40. The 1st nuclear plant in world was commissioned in A. U.S.S.R B. U.S.A C. U.A.E D. U.K. 41. Maximum demand / Connected load = A. average demand B. demand factor C. load factor D. diversity factor 42. Safety factor of insulator is A. puncture strength /flash over voltage B. flash over voltage /puncture strength C. string efficiency/flashover D. puncture strength / string efficiency 43. What is the full form of MNP? A. Magnetic neutral pole B. Magnetic neutral plane C. Magnetic field neutral pole D. Magnetic field neutral plane 44. The concept of an electrically short, medium and long line is primarily based on A. nominal voltage of the line B. physical length of the line C. wavelength of the line D. power transmitted over the line 45. Keeping in view the cost and overall effectiveness, the following circuit breaker is suited for capacitor bank switching A. vacuum B. oil C. air blast D. SF6 46. In a biased differential relay the bias is defined as the ratio of A. fault current and operating coil current B. operating coil current and restraining coil current C. number of turns of restraining and operating coil D. fault current and restraining coil current devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 47. What is the coincidence factor? A. reciprocal of the diversity factor B. reciprocal of the load factor C. reciprocal of the plant factor D. none of the above 48. Where is annealed copper conductor used? A. overhead conductors B. both wiring and winding wires C. cables D. bus bars 49. What is the full form of EMU? A. Electrical Multiple Unit B. Electro Motive Unit C. Electrical Motors Unit D. Electro Motors Unit 50. What materials are used for overhead trolley wire? A. Aluminum B. Bronze C. nickel D. Copper Alloys 51. What is the basic function of zener diode in static relay? A. Stabilize the Voltage B. Increase the Voltage C. unstabilize the voltage D. decrease the voltage 52. Where air circuit breakers are used? A. up to 11 KV B. up to 33 KV C. up to 12 KV D. up to 66 KV 53. Where is one & half breaker arrangement used? A. high voltage system B. extra high voltage system C. medium voltage system D. none of the above 54. The bridge used to measure insulation of cable. A. Wien B. Schering C. Maxwell D. Kelvin devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 55. What is the unit of measuring dielectric strength of the transformer oil? A. Kilo-volt B. Kilo-volt/milimeter C. Kilo-volt/meter D. Volt/meter 56. What material is used to fill in the breather? A. CaCl2 B. Ca(OH)2 C. Mica D. CaHCO3 57. What is/are the factor/s on which the hysteresis loss depend/s? A. frequency B. frequency and flux density C. magnetic flux intensity D. none of the above 58. A switch-tail ring counter is made by using a single D-FF , the following circuit is A. T FF B. D FF C. S-R FF D. J-K FF 59. The MOSFET switch on state may be considered equivalent to A. capacitor B. inductor C. resistor D. battery 60. The fast logic Family is A. TTL B. ECL C. TRL D. DRL 61. Litz wires are used for intermediate frequencies to overcome A. corona effect B. radio interface C. skin effect D. Ferranti effect 62. The heating time constant of an electrical machine gives an induction of its A. rating B. cooling C. overload capacity D. short time rating devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 63. The amplitude spectrum of a Gaussian pulse is A. uniform B. A sin function C. Gaussian D. impulse function 64. In single pulse modulation PWM inverters sixth harmonic can be eliminated if pulse width equal to A. 30 Degree B. 60 Degree C. 36 Degree D. 1080 Degree 65. A single phase full bridge inverter can operated in load commutation mode in case load consist of A. RL B. RLC underdamped C. RLC overdamped D. RLC critically damped 66. Equal area criterion gives the information regarding A. stability region B. relative stability C. absolute stability D. swing curves 67. Thermistor is used for measurement of A. displacement B. pressure C. flow D. temperature 68. The high torque by weight ratio in an analog indicating instrument indicates A. high friction loss B. fast response C. low friction loss D. show response 69. In a rectifier circuit, the diode converts A. Alternating voltage to direct voltage B. Both A and C options are connect C. Alternating voltage to direct current D. Alternating current to direct voltage 70. Why are capacitors used with large AC induction motors? A. improve voltage level B. improve power factor C. improve power level D. improve current level devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 71. Which motors not used for sub-urban services? A. AC single phase series motor B. ordinary Dc series motor C. three phase induction motor D. DC shunt motor 72. Where is metadyne control employed? A. sub-urban railway B. urban railway C. main line service railway D. underground railway 73. Which material is mostly used for the filament of incandescent lamps? A. Tantalum B. Carbon C. Copper D. Tungsten 74. Which is connected in parallel with the starter of a fluorescent tube? A. condenser B. resistance C. choke D. reversing switch 75. Which one of the following is a passive transducer? A. piezoelectric B. LVDT C. photovoltaic cell D. thermocouple 76. Majority of distribution substations are of which type? A. indoor B. pole mounted C. outdoor D. none of the above 77. What is the value of safety factor of pin type insulator? A. 12 B. 8 C. 10 D. 7 78. In an active filter, which element is absent? A. inductor B. capacitor C. both A and B D. resistor devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 79. Advantage/s of active filter is/are A. do not offer gain B. easy to tune C. both A and B D. derive high impedance load 80. Disadvantage/s of constant k type filter. A. characteristic impedance unchanged in pass band B. attenuation does not increase rapidly beyond cutoff frequency. C. both A and B D. none of the above 81. Piezoelectric effect is carried out in A. composite filter B. crystal filter C. m derived D. constant k prototype 82. In Cauer 1 form, last element in the network is A. Lseries B. Cseries C. Lshunt D. Cshunt 83. Property of pure inductor is A. only stores energy B. do not dissipate energy and do not store also C. dissipated energy and also stores it D. do not dissipate energy but only stores it 84. Hydrogen cooling is used in A. small plant B. medium plant C. both A and B D. large plant 85. Pre-commissioning test/s to be carried out on a transformer. A. polarity tests B. ratio test C. vector group tests D. all of the above 86. Peterson coil is used in A. DC power transmission line B. AC transmission line C. DC motor D. both A and B devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 87. Effect of gap between horns in horn gap arrestor A. gap increases arrestor will not work B. gap decreases arrestor will not work C. gap increases arrestor will work better D. none of the above 88. Alternating current is found most suitable for A. arc welding B. resistance welding C. gas welding D. electric arc welding 89. R.T.T stands for A. round trip time B. relay trip time C. relay trip tune D. relay tripping target 90. The speed of rotation of 5th harmonic component in the stator of an induction motor is A. 5 times the synchronous speed B. 1/15 times the synchronous speed C. 1/5 times the synchronous speed D. 0.5 times the synchronous speed 91. How does the depth of laying affect the current carrying capacity of cables? A. decreases B. increases C. unchanged D. doubles 92. Function of bituminous compound in joints of cable is A. Protect joints from heat B. protect joints from moisture penetration C. provide mechanical strength D. none of the above 93. In illumination, what is lamp efficiency? A. total flux in lumen / 2pi B. lumens/watt C. lumen-watt D. total flux in lumen / 4pi 94. Melting point of tungsten filament in degree centigrade is A. 3400 B. 340 C. 34 D. 2000 devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 95. Insulated conductor is termed as cable A. wire B. pipe C. conductor D. cable 96. What gases/s is/are used for TIG welding? A. argon B. helium C. nitrogen D. all of the above 97. In DC series motor, torque is A. proportional to the current B. proportional to the square of the current C. inversely proportional to current squared D. no relation with current 98. In speed time curve of train what stage comes after free running A. coasting B. initial acceleration C. constant speed D. braking 99. Metadyne control method is employed in which traction system? A. urban B. underground C. suburban D. rural 100. Bell transformer is a A. step up B. step down C. 1:1 D. misnomer not a transformer 101. Factor on which frequency of an alternator depends. A. number of poles and synchronous speed B. pole and rotor speed C. synchronous speed D. independent of any factors 102. Length of sections in overload supply system depends on factors A. substation spacing B. traffic density C. both A and B D. neither A nor B devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 103. In control systems, integrator is represented by A. s B. s2 C. 1/ s2 D. 1/s 104. In an escalator, which motor is used? A. single phase induction motor B. DC shunt motor C. three phase induction motor D. universal motor 105. For a lead compensator, pole lies A. on LHS before zero B. on origin C. on LHS D. on RHS 106. When two inductances are in series, their equivalent will be A. L 1 + L 2 B. L 1 – L 2 C. (L 1 + L 2) / L 1 L 2 D. none of the above 107. Universal motor has which of the following application? A. domestic pump B. traction C. food mixer D. lift 108. In a highly inductive circuit, a small capacitance is added in series. The angle between voltage and current will A. decrease B. increase C. remain same D. indeterminant 109. The value of current at resonance in a series RLC circuit is affected by the value of A. L B. C C. R D. none of the above 110. Superposition theorem is not applicable to this network. A. linear elements B. nonlinear elements C. dependent current source D. transformer devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 111. In a balanced wheatstone bridge if positions of detector and source are interchanged then bridge will still remain balanced. The inference can be drawn from A. duality B. reciprocity theorem C. compensation theorem D. both A and B 112. A network is linear if A. response proportional to excitation function B. principle of superposition applies C. principle of homogeneity applies D. both B and C 113. The trigonometric fourier series of a periodic function can have only A. cosine terms B. sine terms C. both A and B D. DC and cosine terms 114. OLTF G(s)=s-2/s+2 is a A. all pass filter B. band stop filter C. band reject filter D. band pass 115. When compared, a 1st order LPF a 2nd order LPF has A. lower voltage gain B. higher voltage gain C. higher cut off frequency D. faster drop in filter response 116. During hunting of a synchronous motor A. -ve phase sequence current are generated B. damper bar develops torque C. harmonics are developed D. none of the above 117. A system is stable for A. G.M & P.M both +VE B. G.M & P.M both -VE C. G.M -VE D. P.M -VE 118. T.F of zero order hold response is A. (1/s)X1-est B. (1/s)X1-e-st C. (s)X1-est D. (1/s)Xe-st devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 119. Load frequency control is achieved by properly matching the individual machine’s A. turbine inputs B. reactive powers C. generated voltages D. generator ratings 120. Right Hand Screw rule resembles A. cross product B. dot product C. both A and B D. neither A nor B 121. On which factors does the severity of electric shock depends A. only on pathway through the body B. pathway through the body, type of supply ac/dc and magnitude of voltage C. only on the amount of current D. only on magnitude of voltage 122. What type of ladder is used for overhead lines work? A. dry wooden B. stainless steel C. wooden D. aluminum 123. B.O.T.U stands for A. British Thermal Unit B. Board of Thermal Unit C. British Oxygen Trade Unit D. Board of Trade Unit 124. Capacitor banks are connected with AC induction motor A. in parallel B. in series C. not connected at all D. can be connected either way in series/parallel 125. When a circuit contains two unequal resistors in parallel, A. voltage drops across both are same B. currents in both are same C. heat losses in both are same D. voltage drops are according to their resistive value 126. Capacitor fitted with ceiling/table fans is of the value of A. 1-2 microfarads B. 2-3 microfarad C. 0.1 microfarads D. 5-10 farads devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 127. Factor/s on which the speed of a DC motor depend/s upon A. armature current B. applied voltage C. field flux D. all of the above 128. Which single phase motor does operate at high p.f.? A. capacitor start B. capacitor run C. split phase D. shaded pole 129. Reduction factor f in illumination is A. MSCP/MHCP B. MHCP/MSCP C. 1/MHCP D. 1/MSCP 130. In a transformer operation, which quantity remains fixed? A. frequency B. voltage C. current D. all of above 131. 1 TESLA = A. 1 wb- m2 B. 1 wb/ m2 C. 1wb D. 1wb/m 132. The loss that occurs in a magnetic core of a transformer. A. copper loss B. iron loss C. stray loss D. dielectric loss 133. Which special type of motor has rotor movements in discrete steps? A. stepper motor B. reluctance motor C. hysteresis motor D. servomotors 134. Maximum KVA demand of the consumer is related to p.f. in what way? A. inversely proportional B. directly proportional C. equal D. no relation devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 135. Power factor p.f. is defined as the A. sine of the angle between voltage and current in ac circuit B. cosine of angle between voltage and current in an ac circuit C. cosine of angle between power and voltage in ac circuit D. tangent of the angle between voltage and current in ac circuit 136. Strain insulator is used for voltage level of A. >33KV B. <11KV C. >66KV D. 132KV 137. If the length of a capacitor is doubled, its capacitance value is A. halved B. doubled C. quadrupled D. no change 138. For voltage level beyond 66KV, three phase system employs A. three single core cable B. three core cable C. both A and B D. neither A nor B 139. There are how many types of DC distributors? A. 3 B. 2 C. 5 D. 4 140. Switchgear equipment include A. relays and CB B. switches C. fuses D. all of these 141. MERZE PRICE current scheme protection is used in A. transformer B. alternator C. both A and B D. busbars 142. An electric current of 6 A is same as A. 6 joule/second B. 6 Coulomb/second C. 6 watt/second D. none of the above devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 143. Majority of distribution substations are of what type? A. pole mounted B. indoor C. outdoor D. underground 144. The effect/s of temperature on internal resistance of a battery. A. directly proportional B. inversely proportional C. no effect D. none of the above 145. What are the various colors obtained in cold cathode tubes? A. yellow and oranged red B. black C. white D. both B and C 146. What dielectric material is used in the capacitor used for p.f. correction? A. vacuum B. oil impregnated paper C. mica D. glass 147. What traction system is used for suburban and urban services? A. DC system B. ac system C. either AC/DC D. none 148. The recommended preventive maintenance inspection time of bushings of a transformer. A. every 6 months B. every 18 months C. every 12 months D. time of overhaul 149. In an n-type semiconductor, elements of which group of periodic table is added as dopant? A. group 5 B. group 2 C. group 3 D. group 4 150. Clamping circuits are one which inserts? A. AC component in signal B. DC component in signal C. both AC and DC D. none of the above devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 151. Darlington connection is achieved in 2 transistors by connecting A. both emitter B. both collector C. both base D. grounding both collector 152. FM stands for A. frequent modulation B. frequency modulation C. frequency moderator D. frequent moderator 153. An operational amplifier comparator circuit employs A. no feedback B. +ve feedback C. -ve feedback D. both B and C 154. HLT opcode means A. load data to accumulator B. store result in memory C. load accumulator with contents of register D. end of program 155. Dummy strain gauges are used for A. compensation of temperature changes B. increase sensitivity of bridge C. calibration purpose D. all of the above 156. Lead network is used to improve A. improve transient response B. both A and C C. increase bandwidth D. improve steady state response 157. Name test signal/s used in time response analysis A. impulse B. unit step C. unit ramp D. all of the above 158. Energy gap of a semiconductor is approximately A. 1 eV B. 0 eV C. 5-8 eV D. >8 eV devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 159. Type and order of transfer function G(s)=K/s(s+2) A. 1, 2 B. 2, 1 C. 0, 2 D. 1, 1 160. When a circuit contains two unequal resistors in parallel, A. the voltage drops across are both the same B. the currents in both are same C. the heat losses in both are same D. the voltage drops are according to their resistive value 161. Counter is a A. sequential circuit B. combinational circuit C. both A and B D. neither A nor B 162. De Sauty Bridge is best suited for A. capacitors with dielectric loss B. lossless air capacitors C. high Q D. low Q 163. Frequency can be measured by which bridge? A. Campbell B. Wien’s C. Desauty D. none of the above 164. Head phones/audio amplifiers are used as balance detectors in an AC bridge at frequency of A. 250hz and above B. <250hz C. >4khz D. none of the above 165. This/These test/s is/are done to locate cable faults. A. short circuit tests B. Murray loop tests C. Varley loop tests D. both B and C 166. Multi meter measures A. both AC/DC current and voltage B. only ac current C. only dc voltage D. none of the above devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 167. Errors due to human mistakes are A. systematic B. instrumental C. gross D. observational 168. An electric current of 6 A is same as A. 6 joule/second B. 6 Coulomb/second C. 6 watt/second D. none of the above 169. LVDT stands for A. Linear Variable Differential Transformer B. Line Variable Differential Transformer C. Line Variable Differential Transducer D. Linear Variable Differential Transducer 170. Sensitivity factor of a strain gauge is normally of the order of A. 1.5-2.0 B. 1-1.5 C. 0.5-1 D. 5-10 171. For harnessing low variable waterheads, the suitable hydraulic turbine with high % of reaction and runner adjustable vanes is A. impeller B. Francis C. Kaplan D. Pelton 172. Which braking is not possible in series motor? A. regenerative braking B. dynamic braking C. rheostatic braking D. counter current braking 173. Polarity of supply voltage is reversed in which type of braking? A. regenerative braking B. plugging C. dynamic braking D. none of the above 174. In a traction system, electricity is collected from overhead line of voltage of A. 125KV B. 25KV C. 132KV D. 33KV devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 175. In which braking back EMF exceeds supply voltage? A. dynamic B. regenerative C. plugging D. none of the above 176. What type electric drive is used in cranes? A. multimotor B. group C. individual D. both A and C 177. The full form of VVVF control A. Variable Voltage VAR Frequency B. VAR Variable Voltage Frequency C. Variable VAR Voltage Frequency D. Variable Voltage Variable Frequency 178. P.f. can be improved by using A. series capacitor B. capacitor and resistor in series C. indictor and capacitor in parallel D. only shunt capacitor 179. The bridge used for measurement of insulation cables? A. Wien B. Maxwell C. Schering D. Kelvin 180. For a fix value of complex power flow in a transmission line having a sending end voltage V, real power loss will be proportional to A. V B. 1/V 22 C. 1/V D. V 22 181. Q meter works on principle of A. mutual inductance B. series resonance C. self-inductance D. parallel resonance 182. The conduction loss versus device current characteristics of a power MOSFET is best illustrated by A. parabola B. straight line C. rectangular hyperbola D. exponentially decaying function devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 183. The positive reactance equals to negative sequence reactance if equipment is A. motor B. transformer and transmission line C. generator D. all of the above 184. Number of sign changes in the entries in 1st column of root array denotes the no. of A. roots of characteristic polynomial in RHP B. zeroes of system in RHP C. open loop poles in RHP D. open loop zeroes in RHP 185. C eq of two capacitors connected in series is given by A. C1C2 B. C1=C2 C. C1C2/C1+C2 D. C1+C2 186. How many conductor/s rails is/are utilized for the traction system? A. 2 B. 1 C. 3 D. 4 187. Frequency of single phase traction system is A. 50 Hz B. 16.67 Hz C. 450 Hz D. 45 2/5 Hz 188. Disadvantage of a single phase traction system is A. frequency converters are required B. having only one conductor C. requires less maintenance D. none of the above 189. Major requirement/s of the motor in the traction system is/are A. high starting torque B. simplicity in speed control C. ability for with standing continuous vibartion D. all of the above 190. Speed control of a DC series motor can be done by A. field control B. voltage control C. both A and B D. neither A nor B devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 191. Voltage of a dcDC series traction system can be controlled by using A. series resistance and series parallel connection B. series resistance C. series parallel connection D. all of the above 192. Which of the following motor used in hair dryers? A. synchronous motors B. shaded pole IM C. split phase IM D. cage induction motor 193. Which of the following motor is used in grinders? A. capacitor start IM B. capacitor start capacitor run IM C. split phase IM D. synchronous motor 194. Main property of a heating element is A. specific resistance of element should be very low B. specific resistance of element should be very high C. melting point of the material should be low D. material of the heating element should be oxidized 195. Advantage/s of electric heating is/are A. installation and maintenance cost are less B. It is free from dirt C. the system does not produce any flue gas D. all of the above 196. In arc heating, the electrodes used are made up of A. carbon B. graphite C. tungsten D. aluminum 197. The method of heating used for non-conducting materials. A. resistance heating B. induction heating C. dielectric heating D. arc heating 198. A cascade of three linear system time invariant systems is causal & unstable. From this we conclude thatA. Each system in the cascade is individually caused & unstable B. At least one system is unstable & at least one system is causal C. At least one system is causal & all systems are unstable D. The majority are unstable & the majority are causal devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 199. For a single phase capacitor start induction motor, which of the following statement is valid? A. The direction of rotation can be changed by reversing the main winding terminals. B. The capacitor is used for power-factor improvement. C. The direction of rotation can be changed. D. The direction of rotation can be changed by interchanging the terminal. 200. A synchronous generator is feeding a zero power factor(lagging) load at rated current, the armature reaction is A. magnetizing B. cross -magnetizing C. ineffective D. demagnetizing 201. Distributed winding & short chording employed in AC machines will result in A. increase in emf & reduction in harmonics B. reduction in emf & increase in harmonics C. increase in both emf & harmonics D. reduction in both emf & harmonics 202. In a stepper motor, the detent torque means A. the minimum of the static torque with the phase winding unexcited B. the maximum of the static torque with the phase winding excited C. the minimum of the static torque with the phase winding excited D. the maximum of the static torque with the phase winding unexcited 203. In the integral control of the single area system frequency, error is reduced to zero by the A. integrator output & speed changer position attain a constant value B. integrator output decreases but speed changer position moves up C. integrator output increases but speed changer position also becomes down D. integrator output decreases & speed changes position also comes down 204. Schering bridge is used to measure A. capacitance B. frequency C. resistance D. inductance 205. Which machines are mostly gear motors? A. DC motors B. AC single phase motor C. synchronous motor D. induction motor 206. Which machine is used for battery charging? A. DC series generator B. DC shunt generator C. compounded DC generator D. none of the above devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 207. If the rated voltage from the power lines is applied to the primary of a single phase transformer which is operated at no load, then A. both input voltage ¤t are sinusodial B. both input voltage & current are nonsinusodial C. input voltage is nonsinusodial & input current is sinusodial D. input voltage is sinusodial & input current is sinusodial 208. The positive sequence reactance will be equal to negative sequence if the equipment is A. Transformer & transmission lines B. generator C. motor D. none of the above 209. It is another name given to lumen per square centimeter. A. centicandle B. candlepower C. lux centi D. foot lambert 210. This kind of heating is nominally conducting material due to its own power loss when placed on varying magnetic field. A. radiation B. induction C. convection D. conduction 211. In communication, the decrease in power along the transmission system is called A. damping B. attenuation C. de-amplification D. deregulation 212. This is the minimum height above the floor on operating handle of switches and circuit breakers used as switch. A. 2500 mm B. 2000 mm C. 1500 mm D. 1000 mm 213. Sealing compounds must be applied to conduits entering areas producing spark or very hot. The distance of the seal on the end of the conduit entering the said area is A. 900 mm B. 750 mm C. 460 mm D. 250 mm
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Electrical Engineering Objective Questions 214. This is the commonly used motor for either DC or AC power. A. series B. shunt C. repulsion D. shaded pole 215. As a rule, the size of switch board access door with 1000 A or more capacity and has a width of 1900 mm is A. 800 x 2000 mm B. 600 x 2200 mm C. 600 x 2000 mm D. 800 x 2200 mm 216. The minimum insulation resistance for a line using 5.5 mm2 conductor, 600 volts is A. 1 m-Ω B. 250 K- Ω C. 500 K- Ω D. 100 K- Ω 217. The device function number of a relay that prevents generator from motorization. A. 22 B. 32 C. 42 D. 52 218. This kind of fuel as used on steam power plants like in Japan is pollution free. A. LPG B. LNG C. Butane D. Methane 219. The tester to check if a MCCB trips at currents above its trip unit setting is the A. VOM B. Ducter C. Hi-pot D. CBRT 220. Another name given to electronic ballast. A. CEG B. ECG C. GEC D. NOTA 221. The type of ballast that causes darkening of the fluorescent lamp edges is the A. warm start B. instant start C. cold start D. nota devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 222. Efficacy as applied to lamps is the ratio of A. power / lumens B. current / lumen C. voltage / lumen D. brightness / lumen 223. The average power factor of the fluorescent lamp with magnetic ballast. A. below 50% B. 50 to 60% C. 60 to 70% D. 50 to 70% 224. The commercially available electronic ballast operates at this frequency. A. 10 to 20 Hz B. 40 to 50 Hz C. 50 to 60 Hz D. above 100 Hz 225. The operating lifespan of the fluorescent lamp is primarily due to A. operating time B. mounting conditions C. frequency of switching D. nota 226. The motor starter that can reduce the in-rush by 100%. A. ATL B. part winding C. autotransformer D. soft starter 227. The best test set to evaluate the windings of rotating electrical machines is A. Megger B. SCT C. CBRT D. Hi-pot 228. Aside from lightning, power swing, erroneous switching and other factors, the common source of harmonics on the day to day operation of most commercial buildings is A. elevators B. rectification of AC to DC C. capacitor banks D. escalators
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Electrical Engineering Objective Questions 229. The DC generator that requires very minimal change in the excitation but results to a big change in the output voltage is the; A. diverter pole B. amplidyne C. self-excited shunt D. series generator 230. This is the instrument used to determine the magnitude of harmonics present on the electric power being monitored. A. wattmeter B. hook-on ammeter C. power monitor D. power analyzer 231. It is used to determine the illumination in a given work area. A. illumination meter B. brightness meter C. stroboscope D. luxmeter 232. This is the minimum depth requirements of grounding rods. A. 3000 mm B. 10 ft C. 8 ft D. 760 mm 233. It is the material commonly used as grounding rod. A. Ai B. Cu C. CCS D. ACS 234. The de-rating factor on the ampacity of conductors when the number inside the conduit is 25. A. 75% B. 70% C. 60% D. 50% 235. The tool used in pulling electrical wires on a long conduit. A. steel tape B. G.I. wire C. galvanized tape D. fish tape
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Electrical Engineering Objective Questions 236. This is the unit of speed of electronic data transmission. A. pixel B. pulses C. baud D. nota 237. This is a unit used for magnetic moment. A. masnetorque B. magneforce C. magneton D. nota 238. The approximate lumens of a 100 watt incandescent lamp. A. 2000 lumens B. 1750 lumens C. 1500 lumens D. 4050 lumens 239. The highest wattage rating of an incandescent lamp. A. 1000 watts B. 500 watts C. 250 watts D. 100 watts 240. When using black color for ceiling, the approximate reflectance will be within this range. A. 3 to 8% B. 4 to 6% C. 2 to 5% D. 1 to 3% 241. The smallest base holder for an incandescent lamp. A. candelabra B. intermediate C. medium D. mogul 242. The circular shape of an incandescent lamp. A. globular B. ring C. arbitrary D. round sider 243. This three phase transformer connection has continuity on its zero sequence reactance representation. A. delta-delta B. wye-wye ground C. wye ground-wye ground D. nota devilbat of symbianizedotcom
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Electrical Engineering Objective Questions 244. This is the rating of a surge arrester compared to the line to line voltage of a system with its neutral isolated. A. 75% of VLL B. 90% of VLL C. VLL x 100% D. VLL x 1.732 245. This is the rating of a surge arrester to be used compared to the line to line voltage of the system with neutral grounded, it will protect A. 60% of VLL B. 70% of VLL C. 90% of VLL D. 80% of VLL 246. For extra high voltage transmission lines, this is the voltage rating of the arrester to be used. A. 75% of VLL B. 90% of VLL C. VLL x 1.73 D. VLL / 1.73 247. This is a type of surge arrester which employs a resistance element in series with the gaps. A. pellet type B. expulsion type C. valve type D. nota 248. This is used to determine the quality of electrical power. A. voltmeter B. wattmeter C. power meter D. power analyzer 249. This instrument can monitor the voltage harmonics present in an electrical system that is energized. A. voltmeter B. power factor meter C. power analyzer D. nota 250. It is a well-planned Electrical Engineering activity for the purpose of comparing actual parameters to acceptable standard values, and if discrepancies exist, corrective measures are to be recommended. A. evaluation B. inspection C. auditing D. tabulation
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