Surveying objective questions and answers pdf

91.   In Question no. 89, the R.L. of last point
a) is greater than R.L. of first point
b) is same as R.L. of first point
c) is smaller than R.L. of first point
d) cannot be determined from the given data
Ans: c

92. If the horizontal distance between the staff point and the point of observation is d, then the error due to curvature of earth is proportional to
a) d
b) 1/d
c) d2
d) 1/d2
Ans: c

93. Sensitiveness of a level tube is designated by
a) radius of level tube
b) length of level tube
c) length of bubble of level tube
d) none of the above
Ans: a

94. Which of the following statements is in-correct ?
a) Error due to refraction may not be completely eliminated by reciprocal levelling.
b) Tilting levels are commonly used for precision work.
c) The last reading of levelling is always a foresight.
d) All of the above statements are incorrect.
Ans: d

95. Dumpy level is most suitable when
a) the instrument is to be shifted frequ-ently
b) fly levelling is being done over long distance
c) many readings are to be taken from a single setting of the instrument
d) all of the above
Ans: c

96. The difference of levels between two stations A and B is to be determined. For best results, the instrument station should be
a) equidistant from A and B
b) closer to the higher station
c) closer to the lower station
d) as far as possible from the line AB
Ans: a

97. Contour interval is
a) inversely proportional to the scale of the map
b) directly proportional to the flatness of ground
c) larger for accurate works
d) larger if the time available is more
Ans: a

98. An imaginary line lying throughout the surface of ground and preserving a constant inclination to the horizontal is known as
a) contour line
b) horizontal equivalent
c) contour interval
d) contour gradient
Ans: d

99. The suitable contour interval for a map with scale 1 : 10000 is
a) 2 m
b) 5m
c) 10 m
d) 20 m
Ans: a

100. Select the correct statement.
a) A contour is not necessarily a closed curve.
b) A contour represents a ridge line if the concave side of lower value con¬tour lies towards the higher value contour.
c) Two contours of different elevations do not cross each other except in case of an overhanging cliff.
d) All of the above statements are correct.
Ans: c
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