Sidereal day
A. Is the period of time taken by the earth in making a complete rotation with reference to stars
B. Is slightly shorter than an ordinary solar day
C. Is divided into the conventional hours, minutes and seconds
D. All the above
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In a tropical year, the numbers of sidereal days are
A. 365
B. 365.2224
C. 365.2422
D. 366.2422
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In a tropical year, the numbers of sidereal days are
A. One less than mean solar days
B. One more than mean solar days
C. Equal to mean solar days
D. None of these
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The point on the celestial sphere vertically below the observer's position, is called
A. Zenith
B. Celestial point
C. Nadir
D. Pole
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The circle in which a plane tangent to the earth's surface at the point of observation, intersects the celestial sphere, is called
A. Visible horizon
B. Sensible horizon
C. Celestial horizon
D. True horizon
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The type of surveying which requires least office work is
A. tacheomefry
B. trigonometrical levelling
C. plane table surveying
D. theodolite surveying
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During chaining along a straight line, the . leader of the party has 4 arrows in his hand while the follower has 6. Distance of the follower from the starting point is
A. 4 chains
B. 6 chains
C. 120 m
D. 180m
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The difference of levels between two stations A and B is to be determined. For best results, the instrument station should be
A. equidistant from A and B
B. closer to the higher station
C. closer to the lower station
D. as far as possible from the line AB
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Subtense bar is an instrument used for
A. levelling
B. measurement of horizontal distances in plane areas
C. measurement of horizontal distances in undulated areas
D. measurement of angles
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Cross staff is an instrument used for
A. measuring approximate horizontal angles
B. setting out right angles
C. measuring bearings of the lines
D. none of the above
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Theodolite is an instrument used for
A. tightening the capstan-headed nuts of level tube
B. measurement of horizontal angles only
C. measurement of vertical angles only
D. measurement of both horizontal and vertical angles
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Systematic errors
A. Always follow some definite mathematical law
B. Can be removed by applying corrections to the observed values
C. Are also known as cumulative errors
D. All the above
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In a spherical triangle ABC, right angled at C, sin b equals
A. sin a cos A
B. cos a sin A
C. tan a cot A
D. cot A tan a
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Pick up the correct statement from the following:
A. The plane passing through the perspective centre of a stereo pair and a ground point, is known as basal plane
B. Each pair of image points on stereo pair have their own basal plane
C. Relative orientation means reconstructing the basal plane
D. All the above
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Pick up the correct statement from the following:
A. The principal point coincides with plumb point on a true vertical photograph
B. The top of a hill appears on a truly vertical photograph at greater distance than its bottom from the principal point
C. The top of a hill is represented on a vertical photograph at larger scale than the area of a nearby valley
D. All the above
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On vertical photographs, height displacement is
A. Positive for points above datum
B. Negative for points below datum
C. Zero for points vertically below the air station
D. All the above
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The First Point of Aeries
A. Is the point in the celestial sphere where zero meridian crosses the celestial equator
B. Is usually denoted by the Greek letter γ
C. Is located near the very conspicuous rectangle of stars in the constellations of Pegasus and Andromeda
D. All the above
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The process of determining the locations of the instrument station by drawing re sectors from the locations of the known stations is called
A. radiation
B. intersection
C. resection
D. traversing
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If the lower clamp screw is tightened and upper clamp screw is loosened, the theodolite may be rotated
A. on its outer spindle with a relative motion between the vernier and graduated scale of lower plate
B. on its outer spindle without a relative motion between the vernier and gra-duated scale of lower plate
C. on its inner spindle with a relative motion between the vernier and the graduated scale of lower plate
D. on its inner spindle without a relative motion between the vernier and the graduated scale of lower plate
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The position of a heavenly body on the celestial sphere can be completely specified by
A. Its altitude and azimuth
B. Its declination and hour angle
C. Its declination and right ascension
D. All the above
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