A dumpy level was set up at the midpoint between two pegs A and B, 50 m apart and the staff 

readings at and were 1.22 and 1.06. With the level set up at , the readings at 

and were 1.55 and 1.37. The collimation error per 100 m length of sight is 

(A) 0.02 m inclined upwards 

(B) 0.04 m inclined downwards 

(C) 0.04 m inclined upward 

(D) None of these

1 Answer

Answer :

(B) 0.04 m inclined downwards 

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