Surveying problems
- 1. The bearing of C from A is N 30° E and from B, 50 metres east of A, is N 60° W. The departure of C from A is
Options- A. 50 m
- B. 50 3 m
- C. 25 3 m
- D. 25 m Discuss
Correct Answer: 25 m
- 2. If the long chord and tangent length of a circular curve of radius R are equal the angle of deflection, is
Options- A. 30°
- B. 60°
- C. 90°
- D. 120°
- E. 150°. Discuss
Correct Answer: 120°
- 3. The difference in the lengths of an arc and its subtended chord on the earth surface for a distance of 18.2 km, is only
Options- A. 1 cm
- B. 5 cm
- C. 10 cm
- D. 100 cm. Discuss
Correct Answer: 10 cm
- 4. If ? and ? be the elevations of two objects A and B respectively, ? be the angle observed by a sextant. The correct horizontal angle is
Options- A.
- B.
- C.
- D. none of these. Discuss
Correct Answer:
- 5. An imaginary line lying throughout on the surface of the earth and preserving a constant inclination to the horizontal, is called
Options- A. contour line
- B. contour gradient
- C. level line
- D. line of gentle scope. Discuss
Correct Answer: contour gradient
- 6. In horizontal angles, the error due to imperfect levelling of the plate bubble is
Options- A. large when sights are nearly level
- B. large for long sights
- C. less for steeply inclined sights
- D. large for steeply inclined sights. Discuss
Correct Answer: large for steeply inclined sights.
- 7. The slope correction for a 3° slope for a length of 100 m, is
Options- A. -0.11 m
- B. -0.12 m
- C. -1.87 m
- D. -0.137 m Discuss
Correct Answer: -0.137 m
Explanation:
Slope correction = -L(1-cos ?). Where L Slope Distance, ? Slope angle
(Slope correction is always negative).
= -100(1-cos 3°)
= -0.137
- 8. If vertical angles of inclined sights do not exceed 10° and non-verticality of the staff remains within 1°, stadia system of tacheometric observations are made on
Options- A. staff normal
- B. staff vertical
- C. staff normal as well as vertical
- D. none of these. Discuss
Correct Answer: staff normal
- 9. The instrument which is used in plane tabling for obtaining horizontal and vertical distances directly without resorting to chaining, is known as
Options- A. Plane alidade
- B. telescopic alidade
- C. clinometer
- D. tacheometer. Discuss
Correct Answer: telescopic alidade
- 10. While surveying a plot of land by plane tabling, the field observations
Options- A. and plotting proceed simultaneously
- B. and plotting do not proceed simultaneously
- C. and recorded in field books to be plotted later
- D. all the above. Discuss
Correct Answer: and plotting proceed simultaneously
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