60) As applied to staff readings, the corrections for curvature and refraction are respectively The above table shows a part of a level field book. The value of X should be

98.7

100

102.3

103.3

Answer is:

100

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61) 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

1/d

d²

1/d²

Answer is:

d²

62) Sensitiveness of a level tube is designated by

radius of level tube

length of level tube

length of bubble of level tube

none of the above

Answer is:

radius of level tube

63) Which of the following statements is incorrect ?

Error due to refraction may not be completely eliminated by reciprocal levelling.

Tilting levels are commonly used for precision work.

The last reading of levelling is always a foresight.

All of the above statements are incorrect.

Answer is:

All of the above statements are incorrect.

64) Dumpy level is most suitable when

the instrument is to be shifted frequently

fly levelling is being done over long distance

many readings are to be taken from a single setting of the instrument

all of the above

Answer is:

many readings are to be taken from a single setting of the instrument

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60) As applied to staff readings, the corrections for curvature and refraction are respectively The above table shows a part of a level field book. The value of X should be

100

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Related Surveying MCQ with Answers

61) 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

d2

62) Sensitiveness of a level tube is designated by

radius of level tube

63) Which of the following statements is incorrect ?

All of the above statements are incorrect.

64) Dumpy level is most suitable when

many readings are to be taken from a single setting of the instrument

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d²