Civil Engineering - Surveying
d) all involve equal measurement on the
Multiple Choice Questions and
ground
Answers
Ans: a 5. The correction for sag is
1.
A metallic tape is made of
a) steel b) invar
a) always additive b) always subtractive
c) linen
c) always zero
d) cloth and wires
d) sometimes additive and sometimes
Ans: d
subtractive
2.
Ans: b
For a well-conditioned triangle, no
angle should be less than
6.
a) 20°
a) measuring approximate horizontal
b) 30°
angles
c) 45°
b) setting out right angles
d) 60°
c) measuring bearings of the lines
Ans: b
d) none of the above
3.
Ans: b
The angle of intersection of the two
Cross staff is an instrument used for
plane mirrors of an optical square is
7. Normal tension is that pull which
a) 30°
a) is used at the time of standardizing the
b) 45°
tape
c) 60°
b) neutralizes the effect due to pull and sag
d) 90°
c) makes the correction due to sag equal to
Ans: b
zero
4. Which of the following methods of offsets
d) makes the correction due to pull equal
involves less measurement on the ground?
to zero
a) method of perpendicular offsets
Ans: b
b) method of oblique offsets
8.
c) method of ties
measuring perpendicular offsets ?
Which of the following is not used in
a) line ranger
handle
b) steel tape
d) inside of one handle to inside of other
c) optical square
handle
d) cross staff
Ans: b
Ans: a
12.
9.
a) The true meridians at different places
If the length of a chain is found to be
Select the incorrect statement.
short on testing, it can be adjusted by
are parallel to each other.
a) straightening the links
b) The true meridian at any place is not
b) removing one or more small circular
variable.
rings
c) The true meridians converge to a point
c) closing the joints of the rings if opened
in northern and southern hemispheres.
out
d) The maps prepared by national survey
d) all of the above
departments of any country are based on
Ans: a
true meridians. Ans: a
10.
The maximum tolerance in a 20 m
13. In the prismatic compass
chain is
a) the magnetic needle moves with the box
a) ±2 mm
b) the line of the sight does not move with
b) ±3 mm
the box
c) ±5 mm
c) the magnetic needle and graduated
d) ±8 mm
circle do not move with the box
Ans: c
d) the graduated circle is fixed to the box
11.
and the magnetic needle always remains in
The length of a chain is measured from
a) centre of one handle to centre of other
the N-S direction
handle
Ans: c
b) outside of one handle to outside of other
14.
handle
a) the forebearing of AB and back bearing
c) outside of one handle to inside of other
of AB differ by 180°
For a line AB
b) the forebearing of AB and back bearing
line
of BA differ by 180°
c) both give QB of a line
c) both (a) and (b) are correct.
d) both give WCB of a line
d) none is correct
Ans: a
Ans: a
18.
15..
meridian and magnetic meridian at a place is
Local attraction in compass surveying
The horizontal angle between the true
may exist due to
called
a) incorrect levelling of the magnetic
a) azimuth
needle
b) declination
b) loss of magnetism of the needle
c) local attraction
c) friction of the needle at the pivot
d) magnetic bearing
d) presence of magnetic substances near
Ans: b
the instrument Ans: d
19.
16.
magnetic meridian is to the'
In the quadrantal bearing system, a
A negative declination shows that the
whole circle bearing of 293° 30' can be
a) eastern side of the true meridian
expressed as
b) western side of the true meridian
a) W23°30'N
c) southern side of the true meridian
b) N66°30'W
d) none of the above
c) S113°30'N
Ans: b
d) N23°30'W
20.
Ans: b
i) are inverted
17.
ii) are upright
The prismatic compass and surveyor's
The graduations in prismatic compass
compass
iii) run clockwise having 0° at south
a)
iv) run clockwise having 0° at north
give whole circle bearing (WCB) of a
line and quadrantal bearing (QB) of a line
The correct answer is
respectively
a) (i) and (iii)
b) both give QB of a line and WCB of a
b) (i) and (iv)
c) (ii) and (iii)
24. If the lower clamp screw is tightened
d) (ii) and (iv)
and upper clamp screw is loosened, the
Ans: a
theodolite may be rotated
21.
a) on its outer spindle with a relative
Theodolite is an instrument used for
a) tightening the capstan-headed nuts of
motion between the vernier and graduated
level tube
scale of lower plate
b) measurement of horizontal angles only
b) on its outer spindle without a relative
c) measurement of vertical angles only
motion between the vernier and gra-duated
d) measurement of both horizontal and
scale of lower plate
vertical angles
c) on its inner spindle with a relative
Ans: d
motion between the vernier and the
22.
graduated scale of lower plate
The process of turning the telescope
about the vertical axis in horizontal plane is
d) on its inner spindle without a relative
known as
motion between the vernier and the
a) transiting
graduated scale of lower plate
b) reversing
Ans: c
c) plunging
25.
d) swinging
a) vertical circle is to its right and the
Ans: d
bubble of the telescope is down
23.
b) vertical circle is to its right and the
Which of the following is not the
A telescope is said to be inverted if its
function of levelling head ?
bubble of the telescope is up
a) to support the main part of the
c) vertical circle is to its left and the
instrument
bubble of the telescope is down
b) to attach the theodolite to the tripod
d) vertical circle is to its left and the
c) to provide a means for leveling the
bubble of the telescope is up
theodolite
Ans: a
d) none of the above
26.
Ans: d
telescope are placed
The cross hairs in the surveying
a) midway between eye piece and
horizontal angle measurement ?
objective lens
a) error due to eccentricity of verniers
b) much closer to the eye-piece than to the
b) error due to displacement of station
objective lens
signals
c) much closer to the objective lens than to
c) error due to wrong adjustment of line of
the eye piece
collimation and trunnion axis
d) anywhere between eye-piece and
d) error due to inaccurate graduation
objective lens
Ans: b
Ans: b
30. The error due to eccentricity of inner and
27. For which of the following permanent
outer axes can be eliminated by
adjustments of theodolite, the spire test is
a) reading both verniers and taking the
used ?
mean of the two
a) adjustment of plate levels
b) taking both face observations and
b) adjustment of line of sight
taking the mean of the two
c) adjustment of horizontal axis
c) double sighting
d) adjustment of altitude bubble and
d) taking mean of several readings dis-
vertical index frame
tributed over different portions of the
Ans: c
graduated circle
28.
Ans: a
The adjustment of horizontal cross hair
is required particularly when the instrument
31.
is used for
a) horizontal line
a) leveling
b) line parallel to the mean spheriodal
b) prolonging a straight line
surface of earth
c) measurement of horizontal angles
c) line passing through the centre of cross
d) all of the above
hairs and the centre of eye piece
Ans: a
d) line passing through the objective lens
29.
and the eye-piece of a dumpy or tilting level
Which of the following errors is not
eliminated by the method of repetition of
A'level line'is a
Ans: b
32.
The rise and fall method of levelling
c) provides a check on the reduction of
provides a complete check on
intermediate point levels
a) backsight
d) quicker and less tedious for large
b) intermediate sight
number of intermediate sights
c) foresight
Ans: c
d) all of the above
36. If the staff is not held vertical at a
Ans: d
level¬ling station, the reduced level
33.
calculated from the observation would be
If the R.L. of a B.M. is 100.00 m, the
back- sight is 1.215 m and the foresight is
a) true R.L.
1.870 m, the R.L. of the forward station is
b) more than true R.L.
a) 99.345 m
c) less than true R.L.
b) 100.345 m
d) none of the above
c) 100.655m
Ans: c
d) 101.870m
37.
Ans: a
a) completely eliminates curvature
34.
correction
Height of instrument method of
Refraction correction
levelling is
b) partially eliminates curvature correction
a) more accurate than rise and fall method
c) adds to the curvature correction
b) less accurate than rise and fall method
d) has no effect on curvature correction
c) quicker and less tedious for large
Ans: b
number of intermediate sights
38. If the horizontal distance between the
d) none of the above
staff point and the point of observation is d,
Ans: c
then the error due to curvature of earth is
35.
proportional to
The rise and fall method
a) is less.accurate than height of
a) d
instrument method
b) 1/d
b) is not suitable for levelling with tilting
c) d2
levels
d) 1/d2
Ans: c
Ans: a
39. Which of the following statements is in-
42.
correct ?
a) inversely proportional to the scale of the
a) Error due to refraction may not be
map
completely eliminated by reciprocal
b) directly proportional to the flatness of
levelling.
ground
b) Tilting levels are commonly used for
c) larger for accurate works
precision work.
d) larger if the time available is more
c) The last reading of levelling is always a
Ans: a
foresight.
43.
d) All of the above statements are
surface of ground and preserving a constant
incorrect.
inclination to the horizontal is known as
Ans: d
a) contour line
40.
b) horizontal equivalent
Dumpy level is most suitable when
Contour interval is
An imaginary line lying throughout the
a) the instrument is to be shifted frequently
c) contour interval
b) fly levelling is being done over long
d) contour gradient
distance
Ans: d
c) many readings are to be taken from a
44.
single setting of the instrument
a) A contour is not necessarily a closed
d) all of the above
curve.
Ans: c
b) A contour represents a ridge line if the
41.
concave side of lower value con¬tour lies
The difference of levels between two
Select the correct statement.
stations A and B is to be determined. For
towards the higher value contour.
best results, the instrument station should be
c) Two contours of different elevations do
a) equidistant from A and B
not cross each other except in case of an
b) closer to the higher station
overhanging cliff.
c) closer to the lower station
d) All of the above statements are correct.
d) as far as possible from the line AB
Ans: c
45.
A series of closely spaced contour
The correct answer is
lines represents a
a) only (i)
a) steep slope
b) (i)and(ii)
b) gentle slope
c) (ii) and (iii)
c) uniform slope
d) (i), (ii) and (iii)
d) plane surface
Ans: d
Ans: a
49. Which of the following methods of con-
46.
touring is most suitable for a hilly terrain ?
Direct method of contouring is
a) a quick method
a) direct method
b) adopted for large surveys only
b) square method
c) most accurate method
c) cross-sections method
d) suitable for hilly terrains
d) tacheometric method
Ans: c
Ans: d
47.
50. Select the correct statement.
In direct method of contouring, the
process of locating or identifying points
a) Contour interval on any map is kept
lying on a contour is called
constant.
a) ranging
b) Direct method of contouring is
b) centring
cheap¬er than indirect method.
c) horizontal control
c)
d) vertical control
map cannot be ascertained.
Ans: d
d) Slope of a hill cannot be determined
Inter-visibility of points on a contour
with the help of contours. 48.
In the cross-section method of indirect
Ans: a
contouring, the spacing of cross-sections
51.
Closed contours, with higher value
depends upon
inwards, represent a
i) contour interval
a) depression
ii) scale of plan
b) hillock
iii) characteristics of ground
c) plain surface
d) none of the above
b) urban areas
Ans: b
c) hilly areas
52.
d) plains
Contour interval is
a) the vertical distance between two con-
Ans: c
secutive contours
56.
b) the horizontal distance between two
a) radiation
consecutive contours
b) traversing
c) the vertical distance between two points
c) resection
on same contour
d) all of the above
d) the horizontal distance between two
Ans: a
points on same contour
57.
Ans: a
a) Tracing paper method
53.
b) Bessels method
Benchmark is established by
Detailed plotting is generally done by
Three point problem can be solved by
a) hypsometry
c)
b) barometric levelling
d) all of the above
c) spirit levelling
Ans: d
d) trigonometrical levelling
58.
Ans: c
locations of the instrument station by
54.
drawing re sectors from the locations of the
The type of surveying which requires
Lehman's method
The process of determining the
least office work is
known stations is called
a) tacheomefry
a) radiation
b) trigonometrical levelling
b) intersection
c) plane table surveying
c) resection
d) theodolite surveying
d) traversing
Ans: c
Ans: c
55. Intersection method of detailed plotting
59.
is most suitable for
centering in plane table survey is
a) forests
a) spirit level
The instrument used for accurate
b) alidade
i) radiation
c) plumbing fork
ii) traversing
d) trough compass
iii) intersection
Ans: c
iv) resection
60.
The correct answer is
Which of the following methods of
plane table surveying is used to locate the
a) (i) and (ii)
position of an inaccessible point ?
b) (iii) and (iv)
a) radiation
c) (ii) and (iv)
b) intersection
d) (i) and (iii)
c) traversing
Ans: c
d) resection
64.
Ans: b
tripod, the main operations which are
61.
needed at each plane table station are
The two point problem and three point
After fixing the plane table to the
problem are methods of
i) levelling
a) resection
ii) orientation
b) orientation
iii) centering
c) traversing
The correct sequence of these operations is
d) resection and orientation
a) (i), (ii),.(iii)
Ans: d
b) (i), (iii), (ii)
62.
c) (iii), (i), (ii)
The resection by two point problem as
compared to three point problem
d) (ii), (Hi), (i)
a)
Ans: b
gives more accurate problem
b) takes less time
65.
c) requires more labour
theodolite traversing is suitable for locating
d) none of the above
the details which are far away from transit
Ans: c
stations ?
63.
a) measuring angle and distance from one
The methods used for locating the
plane table stations are
Which of the following methods of
transit station
b) measuring angles to the point from at least two stations c) measuring angle at one station and distance from other d) measuring distance from two points on traverse line Ans: b 101. The number of horizontal cross wires in a stadia diaphragm is a) one b) two c) three d) four Ans: c
66. For a tacheometer the additive and multi-plying constants are respectively a) 0 and 100 b) 100 and 0 c) 0 and 0 d) 100 and 100 Ans: a
