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- Question
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.
- Correct Answer
- 1.345
- 1. 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
- 2. 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
- 3. 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
- 4. 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
- 5. 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
- 6. 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
- 7. 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
- 8. The rise and fall method of reduction of levels, provides a check on
Options- A. back sights
- B. fore sights
- C. intermediate sights
- D. all of these. Discuss
- 9. An angles of 45° with a chain line may be set out with
Options- A. optical square
- B. open cross staff
- C. Fench cross staff
- D. prismatic square. Discuss
- 10. In chain surveying, perpendiculars to the chain line, are set out by
Options- A. a theodolite
- B. a prismatic compass
- C. a level
- D. an optical square Discuss
Surveying problems
Search Results
Correct Answer: and plotting proceed simultaneously
Correct Answer: telescopic alidade
Correct Answer: staff normal
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: some where near zero and reading both verniers on back station
Correct Answer: all the above.
Correct Answer: all of these.
Correct Answer: Fench cross staff
Correct Answer: an optical square
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