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49.

Sensitiveness of a level tube is designated by

A.	radius of level tube	B.	length of level tube
C.	length of bubble of level tube	D.	none of the above

50.

Size of a theodolite is specified by

A.	the length of telescope	B.	the diameter of vertical circle
C.	the diameter of lower plate	D.	the diameter of upper plate

51.

Subtense bar is an instrument used for

A.	levelling	B.	measurement of horizontal distances in plane areas
C.	measurement of horizontal distances in undulated areas	D.	measurement of angles

52.

The adjustment of horizontal cross hair is required particularly when the instrument is used for

A.	leveling	B.	prolonging a straight line
C.	measurement of horizontal angles	D.	all of the above

53.

The allowable length of an offset depends upon the

A.	degree of accuracy required	B.	method of setting out the perpendiculars and nature of ground
C.	scale of plotting	D.	all of the above

54.

The angle between the prolongation of the preceding line and the forward line of a traverse is called

A.	deflection angle	B.	included angle
C.	direct angle	D.	none of the above

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