The magnetic bearing of a lines is 55°30' and the magnetic declination is 4°30' west. The true bearing of a line will be ............

An invert is taken when the point is ............

The telescope of a dumpy level ............

The desirable multiplying and additive constants for a tacheometer ............

The instrument attached to the wheel of a vehicle in order to measure the distance travelled, is called ............

Dumpy level is most suitable when ............

If a tacheometer is fitted with an anallatic lens ............

Which of the following can be neutralized by setting the level midway between the two stations?

Drop arrow is used in ............