Keeping the instrument height as 1.5 m, length of staff 4 m, the slope of the ground as 1 in 10, the 

sight on the down-slope, must be less than 

(A) 30 m 

(B) 25 m 

(C) 20 m 

(D) 15 m 

1 Answer

Answer :

(B) 25 m 

Related questions

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Description : Pick up the correct statement from the following: (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 ... position (C) The first sight on each change point is a fore sight (D) All the above

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Description : A level when set up 25 m from peg A and 50 m from peg B reads 2.847 on a staff held on A and 3.462 on a staff held on B, keeping bubble at its centre while reading. If the reduced levels of A and B are 283.665 m ... collimation error per 100 m is (A) 0.015 m (B) 0.030 m (C) 0.045 m (D) 0.060 m

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