Surveying
According to Napier's Rules of circular parts for a right angled triangle, sine of middle part equals the product of

Sines of two adjacent parts
Both (A) and (B) above
Cosines of two adjacent parts
Tangents of two adjacent parts

ANSWER DOWNLOAD EXAMIANS APP

Surveying
Dumpy level is most suitable when

fly levelling is being done over long distance
many readings are to be taken from a single setting of the instrument
All of these
the instrument is to be shifted frequently

ANSWER DOWNLOAD EXAMIANS APP