Surveying
For plane ground the scale of a vertical photograph will be same as that of a tiled photograph along the photo parallel through

Principal point
Isocenter
Plumb point
None of these

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Surveying
The First Point of Aeries

Is the point in the celestial sphere where zero meridian crosses the celestial equator
Is usually denoted by the Greek letter ?
Is located near the very conspicuous rectangle of stars in the constellations of Pegasus and Andromeda
All listed here

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Surveying
Spring tides are caused when

Sun and moon are in line with earth
Solar tidal force acts opposite to lunar tidal force
None of these
Solar tidal force and lunar tidal force both coincide

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Surveying
A ’level line’ is a

line parallel to the mean spheriodal surface of earth
line passing through the objective lens and the eye-piece of a dumpy or tilting level
horizontal line
line passing through the center of cross hairs and the center of eye piece

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