500 Best Surveying MCQ
Q65). The process of turning the telescope of a theodolite over its supporting axis through 180° in a vertical plane, is called
a).transiting
b).reversing
c).plunging
d).any one of these
Correct Answer:
any one of these
Explanation:
Q66). An imaginary line joining the point of intersection of the cross-hairs of the diaphragm and the optical centre of the object glass, is known as
a).fundamental line
b).axis of telescope
c).axis of level tube
d).line of collimation
Correct Answer:
line of collimation
Explanation:
Q67). A line joining the optical centre of the object glass and the centre of the eye piece, is known as
a).fundamental line
b).axis of telescope
c).axis of level tube
d).line of collimation
Correct Answer:
axis of telescope
Explanation:
Q68). 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
Correct Answer:
front of the eye piece
Explanation:
Q69). 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
Correct Answer:
nearer to the eye piece
Explanation:
Q70). 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
Correct Answer:
real and inverted
Explanation:
Q71). 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
Correct Answer:
axis of the level tube
Explanation:
Q72). 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
Correct Answer:
vertical axis
Explanation: