Homologous points are
A. Opposite corners of a photograph
B. Nodal points of the camera lens
C. Corresponding points on the ground and photograph
D. Plumb points of stereo pair of photographs
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Limiting gradient for locating the base line on evenly-sloping ground, is
A. 1 in 12
B. 1 in 10
C. 1 in 8
D. 1 in 6
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According to Napier's Rules of circular parts for a right angled triangle, sine of middle part equals the product of
A. Tangents of two adjacent parts
B. Sines of two adjacent parts
C. Cosines of two adjacent parts
D. Both (A) and (B) above
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Pick up the incorrect statement from the following:
A. Latitudes north of the equator are taken as positive
B. Latitudes south of the equator are taken as negative
C. Longitudes east of Greenwich are taken as negative
D. Longitudes west of Greenwich are taken as positive
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Pick up the correct statement from the following:
A. North end of the polar axis is known as North Pole
B. South end of the polar axis is known as South Pole
C. Point where polar axis when produced northward intersects the celestial sphere, is known as north celestial pole
D. All the above
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The value of geocentric parallax to be added to the observed altitude of sun is
A. 9" cos α
B. 9" sin α
C. 9" tan α
D. 9" cot α
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While making astronomical observations, the observer is mainly concerned with
A. The direction of the vertical, the axis of rotation of the instrument
B. The direction of the poles of the celestial sphere
C. The direction of the star from the instrument
D. All the above
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If v, t and H f are the ground speed of the aircraft, the shutter speed of the camera and the scale of the photograph respectively, then the amount of image displacement
A. i = f v × t × H
B. i = t × H v × f
C. i = v × t × H f
D. i = v × f t × H
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An aerial photograph may be assumed as
A. Parallel projection
B. Orthogonal projection
C. Central projection
D. None of these
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G.M.T. corresponding to given mean time, equals
A. L.M.T. - East longitude in time
B. L.M.T. + East longitude in time
C. L.M.T. - West longitude in time
D. None of these
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There are two stations A and B. Which of the following statements is correct?
A. The fore bearing of AB is AB
B. The back bearing of AB is BA
C. The fore and back bearings of AB differ by 180°
D. All the above
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Homologous point is
A. Photo principal point
B. Ground principal point
C. Ground isocenter
D. All the above
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Intersection method of detailed plotting is most suitable for
A. forests
B. urban areas
C. hilly areas
D. plains
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The maximum tolerance in a 20 m chain is
A. ±2 mm
B. ±3 mm
C. ±5 mm
D. ±8 mm
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In the quadrantal bearing system, a whole circle bearing of 293° 30′ can be expressed as
A. W 23° 30’ N
B. N 66° 30’ W
C. S 113° 30’ N
D. N 23° 30’ W
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The sensitivity of a bubble tube can be increased by
A. increasing the diameter of the tube
B. decreasing the length of bubble
C. increasing the viscosity of liquid
D. decreasing the radius of curvature of tube
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Pick up the correct statement from the following:
A. Aerial photographs may be either vertical or oblique
B. Vertical photographs are taken with the axis of camera pointing vertically downward
C. Vertical photographs are used for most accurate maps
D. All the above
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Pick up the incorrect statement from the following:
A. Apparent solar time is measured from the lower transit of the true sun
B. Mean solar time is measured from the lower transit of the mean sun
C. Sidereal time is measured from the lower transit of the first point of Aries
D. Sidereal time is measured from the upper transit of the first point of Aries
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The altitudes of a circumpolar star at culminations are 70° and 10°, both culminations being north of zenith. The declination of the star, is
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The maximum error in radial line assumption, is
A. H h f tan θ
B. H h f 2 tan θ
C. H h f 2 sin θ
D. H h f cos θ
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