500 Best Surveying MCQ
Q73). 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
Correct Answer:
the objective should be focussed
Explanation:
Q74). When the cross-hairs are not clearly visible,
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
Correct Answer:
the eye-piece should be focussed
Explanation:
Q75). For removing the parallex,
a).the eye-piece should be focussed for distinct vision of cross-hairs
b).the image of the object should be brought in the plane of cross-hairs
c).either A or B
d).both A and B
Correct Answer:
both A and B
Explanation:
Q76). The capacity of a telescope of producing a sharp image is called its
a).definition
b).brightness
c).sensitivity
d).magnification
Correct Answer:
definition
Explanation:
Q77). The brightness of the image …………. the magnifying power.
a).is directly proportional to
b).is inversely proportional to
c).varies directly as the square of
d).varies inversely as the square of
Correct Answer:
varies inversely as the square of
Explanation:
Q78). The ratio of the focal length of the objective to that of an eye-piece of a telescope, is called its
a).definition
b).brightness
c).sensitivity
d).magnification
Correct Answer:
magnification
Explanation:
Q79). The power of a telescope to form distinguishable images of objects separated by small angular distance is called its
a).definition
b).brightness
c).sensitivity
d).resolving power
Correct Answer:
resolving power
Explanation:
Q80). The angle of field of the telescope
a).is independent of the size of the object glass
b).increases as the size of the eye piece increases
c).decreases as the distance between eye piece and object increases
d).all of the above
Correct Answer:
all of the above
Explanation: