The main object of the astronomer to obtain
A. Astronomical latitude
B. Astronomical longitude
C. Astronomical bearing
D. All of these
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Stellar astronomy deals with
A. Plane surveying
B. Geodetic surveying
C. Star observations
D. Planet observations
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The line of collimation method of reduction of levels, does not provide a check on
A. Intermediate sights
B. Fore sights
C. Back sights
D. Reduced levels
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Transit rule of adjusting the consecutive coordinates of a traverse is used where
A. linear and angular measurements of the traverse are of equal accuracy
B. angular measurements are more accurate than linear measurements
C. linear measurements are more accurate than angular measurements
D. all of the above
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The moon rotates round the earth once in every
A. 29 days
B. 29.35 days
C. 29.53 days
D. 30 days
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The height displacement on a vertical photograph
A. Increases as the horizontal distance increases from the principal point
B. Increases as the ground elevation increases
C. Decreases as the flying height increases
D. All the above
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The chord of a curve less than peg interval, is known as
A. Small chord
B. Sub-chord
C. Normal chord
D. Short chord
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The angle between the axis of earth and the vertical at the station of observation is called
A. Astronomical latitude
B. Astronomical co-latitude
C. Co-declination of star
D. Declination of star
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Pick up the correct statement from the following:
A. The vertical plane containing the zenith, the station of observation and the celestial pole is the observer's meridian plane
B. The angle between the direction of star in vertical plane and the direction of the star in horizontal plane is called the altitude of the star
C. The complement of the altitude of star is called the zenith distance of the star
D. All the above
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Pick up the correct statement from the following:
A. Ursa Minor's remains always north of pole star
B. Polar star remains always north of Polaris
C. Polaris remains always north of Ursa Minor's
D. Ursa Minor's pole star and Polaris are the names of the same star
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In field astronomy, the quantities observed are entirely
A. Lengths
B. Angles
C. Heights
D. All of these
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The net ground area of a vertical photograph 20 cm × 20 cm on scale 1 : 10,000 having overlaps 60% and 30%, is
A. 0.50 sq km
B. 0.56 sq km
C. 0.60 sq km
D. 0.64 sq km
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Spring tides are caused when
A. Sun and moon are in line with earth
B. Solar tidal force acts opposite to lunar tidal force
C. Solar tidal force and lunar tidal force both coincide
D. None of these
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Equation of time which is the difference between apparent solar time and mean solar time at any instant, vanishes during one year
A. Once
B. Twice
C. Thrice
D. Four times
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The time interval between successive transits of the moon, is
A. 24 hours 10 minutes
B. 20 hours 25 minutes
C. 24 hours 50 minutes
D. 23 hours 50 minutes
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If the horizontal distance between the staff point and the point of observation is d, then the error due to curvature of earth is proportional to
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A star in northern sphere is said to transit
A. When its altitude is maximum
B. When its azimuth is 180°
C. When it is in south
D. All the above
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Normal tension is that pull which
A. is used at the time of standardising the tape
B. neutralizes the effect due to pull and sag
C. makes the correction due to sag equal to zero
D. makes the correction due to pull equal to zero
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After fixing the plane table to the tripod, the main operations which are needed at each plane table station are (i) Levelling (ii) Orientation (iii) Centering The correct sequence of these operations is
A. (i), (ii), (iii)
B. (i), (iii), (ii)
C. (iii), (i), (ii)
D. (ii), (iii), (i)
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For accurate work, the steel band should always be used in preference to chain because the steel band
A. is lighter than chain
B. is easier to handle
C. is practically inextensible and is not liable to kinks when in use
D. can be easily repaired in the field
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