If a tripod settles in the interval that elapses between taking a back sight reading and the following foresight reading, then the elevation of turning point will
A. increase
B. decrease
C. not change
D. either ‘A’ or ‘B’
Answer: Option A
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Which of the following methods of contouring is most suitable for a hilly terrain?
A. Direct method
B. Square method
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A. 750 mm × 900 mm
B. 600 mm × 750 mm
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A. 22° 30'
B. 23° 27'
C. 23° 30'
D. 24° 0'
Suppose BS is 5 m taken on a benchmark which has RL=100 m.
So Height of Instrument = 100+5=105 m
Now, suppose the true staff reading for the foresight should have been 7 m but since the tripod settles, suppose we get the staff reading as 4m.
So, now we will get RL of foresight as 105-4 = 101 m, but that actually should have been 105 - 7 = 98m.
Thus we got an INCREASED RL for the foresight.
how ?------ by a ies aspirant vachan tatu
How?