Surveying
The correction for sag is

always zero
always subtractive
sometimes additive and sometimes subtractive
always additive

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Surveying
The prismatic compass and surveyor’s compass

both give QB of a line and WCB of a line
both give WCB of a line
give whole circle bearing (WCB) of a line and quadrantal bearing (QB) of a line respectively
both give QB of a line

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Surveying
Spring tides are caused when

Solar tidal force acts opposite to lunar tidal force
Sun and moon are in line with earth
Solar tidal force and lunar tidal force both coincide
None of these

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