The rise and fall method of reduction of levels, provides a check on back sights

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Question
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.

Correct Answer

all of these.

Surveying problems

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1. 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.

2. 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.

3. 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.

4. 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.

5. 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.

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