A star is said to elongate
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If the intercept on a vertical staff is ob-served as 0.75 m from a tacheometer, the horizontal distance between tacheometer and staff station is
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The latitude of a place was obtained by subtracting the zenith distance of a star from its declination, the observed star was between
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The latitude of a place was obtained by subtracting the declination of a star from its zenith distance, the observed star was between
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The flying height of the camera is 1,000 m above mean ground level, the distance of the top of a building from a nadir point is 10 cm and the relief displacement of building is 7.2 mm. The height of the building, is
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The stereo plotting instruments are generally manufactured on the principle of
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The true and mean suns occupy the same meridian at the same time on
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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 station which is selected close to the main triangulation station, to avoid intervening obstruction, is not known as
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In a spherical triangle ABC right angled at C, sin b equals to
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23 cm × 23 cm photographs are taken from a flying height with a camera of focal length of 3600 m and 15.23 cm respectively. A parallax difference of 0.01 mm represents
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The declination and right ascension of the sun becomes 23° 27' N and 90° respectively on
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The declination and right ascension of the sun becomes 23° 27' S and 270° respectively on
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The following sights are taken on a “turning point”
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The horizontal angle between the true meridian and magnetic meridian at a place is called
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A ’level line’ is a
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Accidental errors
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Pick up the correct statement from the following. The difference between the longitudes of the places is obtained.
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Refraction correction
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The number of horizontal cross wires in a stadia diaphragm is
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