Surveying problems
- 1. Pick up the correct statement from the following :
Options- A. Box sextant is used for the measurement of horizontal angles
- B. Cross staff is used for setting out right angles
- C. Gradiometer is used for setting out any required gradient
- D. Line ranger is used for locating intermediate stations on a survey line
- E. All the above. Discuss
Correct Answer: All the above.
- 2. ABCD is a regular parallelogram plot of land whose angle BAD is 60°. If the bearing of the line AB is 30°, the bearing of CD, is
Options- A. 90°
- B. 120°
- C. 210°
- D. 270° Discuss
Correct Answer: 210°
- 3. The intercept of a staff
Options- A. is maximum if the staff is held truly normal to the line of sight.
- B. is minimum if the staff is held truly normal to the line of sight.
- C. decreases if the staff is tilted away from normal
- D. increases if the staff is tilted towards normal. Discuss
Correct Answer: is minimum if the staff is held truly normal to the line of sight.
- 4. Closed contours of decreasing values towards their centre, represent
Options- A. a hill
- B. a depression
- C. a saddle or pass
- D. a river bed. Discuss
Correct Answer: a depression
- 5. Hydrographic surveys deal with the mapping of
Options- A. large water bodies
- B. heavenly bodies
- C. mountaineous region
- D. canal system
- E. movement of clouds. Discuss
Correct Answer: large water bodies
- 6. The difference of level between a point below the plane of sight and one above, is the sum of two staff readings and an error would be produced equal to
Options- A. the distance between the zero of gradient and the foot of the staff
- B. twice the distance between the zero of graduation and the foot of the staff
- C. thrice the distance between the zero of graduation and the foot of the staff
- D. none of the above. Discuss
Correct Answer: twice the distance between the zero of graduation and the foot of the staff
- 7. In chain surveying field work is limited to
Options- A. linear measurements only
- B. angular measurements only
- C. both linear and angular measurements
- D. all the above. Discuss
Correct Answer: linear measurements only
- 8. Diopter is the power of a lens having a focal length of
Options- A. 25 cm
- B. 50 cm
- C. 75 cm
- D. 100 cm
- E. 125 cm Discuss
Correct Answer: 100 cm
- 9. In quadrantal bearing system, back bearing of a line may be obtained from its forward bearing, by
Options- A. adding 180°, if the given bearing is less than 180°
- B. subtracting 180°, if the given bearing, is more than 180°
- C. changing the cardinal points, i.e. substituting N for S and E for W and vice-versa
- D. none of these. Discuss
Correct Answer: changing the cardinal points, i.e. substituting N for S and E for W and vice-versa
- 10. If the radius of a simple curve is R, the length of the chord for calculating offsets by the method of chords produced, should not exceed.
Options- A. R/10
- B. R/15
- C. R/20
- D. R/25. Discuss
Correct Answer: R/20
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