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Surveying

Surveying
In a spherical triangle ABC, right angled at C, sin b equals

cos a sin A
sin a cos A
tan a cot A
cot A tan a

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Surveying
If a star whose declination is 60° N culminates at zenith, its altitude at the lower culmination, is

20°
10°
30°
40°

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Surveying
The stereo plotting instruments are generally manufactured on the principle of

Optical projection
All of these
Optical mechanism projection
Mechanical projection

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Surveying
The point on the photograph where bisector between the vertical line through optical centre of the camera lens and the plate perpendicular meets, is known as

Principal point
Plumb point
Isocenter
Perspective centre

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Surveying
The process of turning the telescope about the vertical axis in horizontal plane is known as

reversing
swinging
transiting
plunging

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Surveying
Subtense bar is an instrument used for

measurement of horizontal distances in plane areas
levelling
measurement of angles
measurement of horizontal distances in undulated areas

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