Surveying
A plate parallel is the line on the plane of the negative

Parallel to the principal line
Perpendicular to the principal line
None of these
Along the bisector of the angle between the principal line and a perpendicular line through principal plane

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Surveying
Circumpolar stars

Are seldom seen near the pole star
Remain always above the horizon
Rotate round the celestial pole
Rotate round the North Pole

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Surveying
If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference toi) altitude bubble on index frameii) altitude bubble on index frame if it is to be used as a leveliii) altitude bubble on telescopeiv) altitude bubble on telescope if it is to be used as a levelThe correct answer is

only (i)
both (i) and (iv)
only (iii)
both (ii) and (iii)

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Surveying
Which of the following errors is not eliminated by the method of repetition of horizontal angle measurement ?

error due to displacement of station signals
error due to inaccurate graduation
error due to eccentricity of verniers
error due to wrong adjustment of line of collimation and trunnion axis

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