Surveying problems
- 1. If L is the specified length of a tape, L1 its actual length and S the measured distance, then, the true distance is given by the formula,
Options- A.
- B.
- C.
- D.
.
Discuss
Correct Answer:
- 2. You have to observe an included angle with better accuracy than what is achievable by a vernier, you will prefer the method of
Options- A. repetition
- B. reiteration
- C. double observations
- D. exactness. Discuss
Correct Answer: repetition
- 3. Accidental or compensating errors of length L are proportional to
Options- A. L
- B. L
- C.
- D. 1/L. Discuss
Correct Answer: L
- 4. If a linear traverse follows a sharp curve round a large lake where it is difficult to have long legs, the accuracy of the traverse may be improved by
Options- A. taking short legs
- B. making repeated observations of angular and linear measurements
- C. making a subsidiary traverse to determine the length of a long leg
- D. all the above. Discuss
Correct Answer: making a subsidiary traverse to determine the length of a long leg
- 5. The operation of resection involves the following steps
- rough orientation of the plane table
- the three lines form a triangle of error
- drawing lines back through the three control points
- select a point in the triangle of error such that each ray is equally rotated either clockwise or anti clockwise
- the points obtained by three rays is the correct location.
The correct sequence is
Options- A. 1, 3, 2, 4, 5
- B. 1, 2, 3, 4, 5
- C. 1, 4, 3, 2, 5
- D. 1, 4, 2, 3, 5 Discuss
Correct Answer: 1, 3, 2, 4, 5
- 6. Pick up the correct statement from the following
Options- A. 1 second of arc corresponds to a displacement ratio of 1:206, 300
- B. 1 degree of arc corresponds to a displacement ratio of 1:57
- C. the angular errors tend to propagate themselves along a traverse as the square root of the number of stations
- D. the errors arising from the linear measures tend to be roughly proportional to the lengths of the lines
- E. all the above. Discuss
Correct Answer: all the above.
- 7. Check lines (or proof lines) in Chain Surveying, are essentially required
Options- A. to plot the chain lines
- B. to plot the offsets
- C. to indicate the accuracy of the survey work
- D. to increase the out-turn Discuss
Correct Answer: to indicate the accuracy of the survey work
- 8. The distance between terminal points computed from a subsidiary traverse run between them, is generally known, as
Options- A. traverse leg
- B. a base
- C. traverse base
- D. all the above. Discuss
Correct Answer: traverse base
- 9. A sewer is laid from a manhole A to a manhole B, 250 m away along a gradient of 1 in 125. If the reduced level of the invert at A is 205.75 m and the height of the boning rod is 3 m, the reduced level of the sight rail at B, is
Options- A. 208.75 m
- B. 202.75 m
- C. 206.75 m
- D. 211.75 m Discuss
Correct Answer: 206.75 m
- 10. For locating a distant object visible from two transit stations, the method usually preferred to, is
Options- A. Angles and distances from transit stations
- B. Angles from two transit stations
- C. distance from two transit stations
- D. Angle from one transit station and distance from the other. Discuss
Correct Answer: Angles from two transit stations
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