Engineering :: Surveying

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111.

The axis of bubble tube must be perpendicular to the vertical axis.

Right

Wrong

112.

The line of collimation must be parallel to the horizontal axis.

Yes

113.

The axis of telescope level must be

parallel

perpendicular

114.

In the surveying telescopes, cross hairs are fitted in

A.	centre of the telescope	B.	optical centre of the eye piece
C.	front of the eye piece	D.	front of the objective

115.

In the surveying telescope, diaphragm is held

A.	inside the eye piece	B.	inside the objective
C.	nearer to the eye piece	D.	nearer to the objective

116.

The image formed by the objective in the plane of cross hairs is

A.	real and straight	B.	real and inverted
C.	virtual and straight	D.	virtual and inverted

117.

An imaginary line tangential to the longitudinal curve of the level at the centre of the tube is called

A.	horizontal axis	B.	vertical axis
C.	axis of the level tube	D.	line of collimation

118.

An axis about which the telescope can be rotated in a horizontal plane, is called

A.	horizontal axis	B.	vertical axis
C.	axis of the level tube	D.	line of collimation

119.

The real image of an object formed by the objective must lie at the centre of telescope.

Agree

Disagree

120.

When the image formed by the objective is not situated in the plane of cross-hairs,

A.	the cross-hairs should be adjusted	B.	the eye-piece should be focussed
C.	the objective should be focussed	D.	the parallex should be removed