Civil Engineering MCQs

Page No. 271

For which of the following permanent adjustments of theodolite, the spire test is used ?


aadjustment of plate levels

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badjustment of line of sight

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c adjustment of horizontal axis

✓


dadjustment of altitude bubble and vertical index frame

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If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated____________?


aon its outer spindle with a relative motion between the vernier and graduated scale of lower plate

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bon its outer spindle without a relative motion between the vernier and gra-duated scale of lower plate

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con its inner spindle with a relative motion between the vernier and the graduated scale of lower plate

✓


don its inner spindle without a relative motion between the vernier and the graduated scale of lower plate

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Size of a theodolite is specified by________________?


athe length of telescope

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bthe diameter of vertical circle

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cthe diameter of lower plate

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d the diameter of upper plate

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A telescope is said to be inverted if its______________?


avertical circle is to its right and the bubble of the telescope is down

✓


b vertical circle is to its right and the bubble of the telescope is up

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cvertical circle is to its left and the bubble of the telescope is down

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d vertical circle is to its left and the bubble of the telescope is up

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Which of the following is not the function of levelling head ?


a to support the main part of the instrument

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b to attach the theodolite to the tripod

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c to provide a means for leveling the theodolite

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dnone of the above

✓


View Answer none of the above

The process of turning the telescope about the vertical axis in horizontal plane is known as______________?


atransiting

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breversing

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cplunging

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d swinging

✓


View Answer swinging

The graduations in prismatic compass_____________?


aare inverted

✓


bare upright

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c run clockwise having 0° at south

✓


drun clockwise having 0° at north

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View Answer (1) and (3)

If the magnetic bearing of the sun at a place at noon in southern hemisphere is 167°, the magnetic declination at that place is________________?


a77° N

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b23° S

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c13° E

✓


d13° W

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View Answer 13° E

Agate cap is fitted with a_________________?


across staff

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blevel

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cchain

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d prismatic compass

✓


View Answer prismatic compass

A negative declination shows that the magnetic meridian is to the________________?


a eastern side of the true meridian

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bwestern side of the true meridian

✓


csouthern side of the true meridian

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d none of the above

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