Related Questions
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The scale of a vertical photograph of focal length f taken from height of H metres above M.S.L., at a point of reduced level h, is
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4
The nautical mile is the length of
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4
In field astronomy, the quantities observed are entirely
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4
Pick up the in-correct statement from the following:
A. Correction for refraction is always negative
B. Correction for parallax is always positive
C. Correction for semi-diameter is always negative
D. Correction for dip is always negative
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4
The method of surveying by triangulation was first introduced by the Dutchman Snell in
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The hour angle of the heavenly body for Greenwich meridian equals the hour angle of the body for any other meridian + longitude:
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The angular distance of a heavenly body from the equator, measured along its meridian, is called
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If θ and δ be the latitude of an observer and declination of a heavenly body respectively, the upper culmination of the body will be south of zenith if its zenith distance, is
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The latitude (λ) of a place and the altitude (α) of the pole are related by
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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
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An aerial photograph may be assumed as
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The scale of the photography taken from a height of 300 m, with a camera of focal length 15 cm, is
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The distance between the projection centre and the photograph, is called
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If E is the spherical excess and R the radius of the earth, the surface area of the triangle, is
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The distance between the minor control point and the principal point should be equal to
A. Base line of the left photograph of stereo pair
B. Base line of the right photograph of stereo pair
C. Sum of the base lines of stereo pair
D. Mean of the base lines of the stereo pair
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If the general ground level of any area is 10% of the flying height, the principal points may be used as the centres of radial directions for small scale mapping even in tilted photograph up to
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The nearest star is so far away from the earth that the directions to it from two diametrically opposite points on the earth differs less than
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The scale of a tilted photograph of focal length f, taken from an altitude H, along the plate parallel through plumb point, is
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4
The sun's declination remains north between
B. June 21 to September 21
C. September 21 to December 21
D. Both (a) and (b) of above
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4
The shortest distance between two places measured along the surface of the earth, is
A. Length of the equator between their longitudes
B. Length of the parallel between their longitudes
C. Length of the arc of the great circle passing through them
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The solar tidal force divided by lunar tidal force is
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The length of a parallel of λ latitude between two meridians is equal to difference in longitudes multiplied by
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If the altitudes of a star at its upper and lower transits are 60° 30' and 19° 30' respectively, the latitude of the place, is
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The difference of height of two points whose parallax difference is 0.8 mm on a pair of stereo pair taken from a height H is 100 m. If mean photo base is 95.2 mm, the flying height is
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The stereo plotting instruments are generally manufactured on the principle of
B. Optical mechanism projection
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The main object of the astronomer to obtain
B. Astronomical longitude
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Longitude of a place is the angular distance between the meridian of the place and
B. The international date line
D. Both (a) and (c) of above
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The angle between the direction of star and the direction of earth's axis of rotation is called
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The point at which sun's declination changes from north to south, is known as
D. Both (b) and (d) of the above
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If α, H, A and δ be the altitude, hour angle, azimuth and declination of a circumpolar star at its elongation, in latitude λ, the following relation holds good