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- Question
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.
- Correct Answer
- staff normal
- 1. 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
- 2. 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
- 3. 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
- 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
- 5. 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
- 6. 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
- 7. 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
- 8. A dumpy level was set up at mid-point between pegs A and B, 80 m apart and the staff readings were 1.32 and 1.56. When the level was set up at a point 10 m from A on BA produced, the staff readings obtained at A and B were 1.11 and 1.39. The correct staff reading from this set up at S should be
Options- A. 1.435
- B. 1.345
- C. 1.425
- D. none of these. Discuss
- 9. In a precision traverse, included angles are measured by setting the vernier
Options- A. to read zero exactly on back station
- B. to read 5° exactly on back station
- C. some where near zero and reading both verniers on back station
- D. all the above. Discuss
- 10. Pick up the correct statement from the following :
Options- A. an observation or the resulting reading with the level on a levelling staff is called sight
- B. a back sight is the first sight taken after setting up the instrument in any position
- C. the first sight on each change point is a fore sight
- D. the second sight on each change point is a back sight
- E. all the above. Discuss
Surveying problems
Search Results
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
Correct Answer: large for steeply inclined sights.
Correct Answer: contour gradient
Correct Answer:
Correct Answer: 10 cm
Correct Answer: telescopic alidade
Correct Answer: and plotting proceed simultaneously
Correct Answer: 1.345
Correct Answer: some where near zero and reading both verniers on back station
Correct Answer: all the above.
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