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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_1.606and_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‚Äö√Ñ√∂‚àö√ë‚Äö√¢‚Ä¢ | |