Question58:-The principle of working of optical square is based upon
A:-Reflection
B:-Refraction
C:-Double reflection
D:-Double refraction
Correct Answer:- Option-C
Question59:-In which system, the bearing of a line is measured with magnetic north in clockwise direction?
A:-The Quadrantal Bearing System
B:-Reduced Bearing System
C:-Magnetic Bearing System
D:-The Whole Circle Bearing System
Correct Answer:- Option-D
Question60:-The top width of the ....
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