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1. |
When an instrument is at P the staff readings on P is 2.748 and on Q is 1.824 when instrument at Q the staff readings on P is 1.606 and Q is 0.928. Distance between P and Q is 1010 mts. R.L. of P is 126.386. Find the angular error in collimation adjustment of the instrument? |
A. | 39″ |
B. | 49″ |
C. | 59″ |
D. | 69″ |
Answer» B. 49″ | |