The want of correspondence in stereo-photographs
A. Is a good property
B. Is a function of tilt
C. Is not affected by the change of flying height between photographs
D. Is minimum when θ is 3°
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If two points differing by 1° of latitude and of the same longitude is 110 km apart on the earth, then two astronomical positions on the moon is about
A. 10 km
B. 25 km
C. 30 km
D. 50 km
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With standard meridian as 82° 30' E the standard time at longitude 90° E is 8 h 30 m. The local mean time at the place will be
A. 7 h 00 m
B. 7 h 30 m
C. 8 h 00 m
D. 9 h 00 m
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In a truly vertical photograph,
A. Principal point coincides the isocenter
B. Iso-centre coincides the plumb point
C. Plumb point coincides the principal point
D. All the above
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Polaris is usually observed for the determination of the latitude when it is
A. At culmination
B. At elongation
C. Neither at culmination nor at elongation
D. Either at culmination or at elongation
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The parallax of a point on the photograph is due to
A. Ground elevation
B. Flying height
C. Length of air base
D. All the above
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To have greatest coverage of the area, the type of photography used, is
A. High oblique
B. Low oblique
C. Vertical
D. None of these
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Which of the following methods of theodolite traversing is suitable for locating the details which are far away from transit stations?
A. Measuring angle and distance from one transit station
B. Measuring angles to the point from at least two stations
C. Measuring angle at one station and distance from other
D. Measuring distance from two points on traverse line
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Horizontal distances obtained by thermometric observations
A. require slope correction
B. require tension correction
C. require slope and tension corrections
D. do not require slope and tension corrections
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A star may culminate at zenith if its declination is
A. Greater than the longitude of the place
B. Less than the latitude of the place
C. Equal to the latitude of the place
D. None of these
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Which of the following statements is incorrect ?
A. Error due to refraction may not be completely eliminated by reciprocal levelling.
B. Tilting levels are commonly used for precision work.
C. The last reading of levelling is always a foresight.
D. All of the above statements are incorrect.
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The displacement of the pictured position of a point of h elevation on a vertical photograph taken with a camera of 30 cm focal length, from an altitude of 3000 m, is
A. 4.4 mm
B. 5.5 mm
C. 6.5 mm
D. 7.5 mm
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Bowditch rule is applied to
A. an open traverse for graphical adjustment
B. a closed traverse for adjustment of closing error
C. determine the effect of local attraction
D. none of the above
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The adjustment of horizontal cross hair is required particularly when the instrument is used for
A. leveling
B. prolonging a straight line
C. measurement of horizontal angles
D. all of the above
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Pick up the correct statement from the following:
A. The horizontal direction of the pole is called astronomical north
B. The angle between the direction of true north and the direction of a survey line is called astronomical bearing
C. The astronomical bearing is generally called azimuth
D. All the above
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Pick up the correct statement from the following:
A. The measured stereoscopic base of photographs is obtained by dividing the air base in metres by the mean scale of the photograph
B. The difference between the absolute parallax of two points depends upon the difference in their elevations
C. The line joining the principal point of a photograph and the transferred principal point of the adjoining photograph, is called stereoscopic base
D. All the above
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For any star to be a circumpolar star, its
A. Declination must be 0°
B. Declination must be 90°
C. Distance from the pole must be less than the latitude of the observer
D. Hour angle must be 180°
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The sidereal day is the time interval between two successive upper transits of
A. Mean sun
B. First point of Aries
C. First point of Libra
D. The polar star
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If a tripod settles in the interval that elapses between taking a back sight reading and the following foresight reading, then the elevation of turning point will
A. increase
B. decrease
C. not change
D. either ‘A’ or ‘B’
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The prismatic compass and surveyor’s compass
A. give whole circle bearing (WCB) of a line and quadrantal bearing (QB) of a line respectively
B. both give QB of a line and WCB of a line
C. both give QB of a line
D. both give WCB of a line
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