Exam 13: Surveying Terminology and Techniques: Part A

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The diurnal variation of the magnetic needle is more in

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The direction of a true meridian at a station is invariable.

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The strength of 'fix' of a plane table from three known points is good if the middle station is

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When the magnetic declination is negative, the magnetic meridian is towards the west of true meridian.

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An optical square is used for the same purpose as the cross-staff, but it is more accurate.

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When the anallatic lens is provided in the telescope of a tacheometer, the additive constant is zero.

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Due to the magnetic influence of the earth, the magnetic needle of the prismatic compass will be inclined downward towards the pole. This inclination of the needle with the horizontal is known as

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In a retrograde vernier, the smallest division of a vernier is

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A reverse curve consists of

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In a whole circle bearing system N 25° 15' W corresponds to

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The real image of an object formed by the objective must lie at the centre of telescope.

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The angle by which the forward tangent deflects from the back tangent of a curve is called

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The theodolite is an instrument used for measuring very accurately

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The deflection angle may have any value between

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The spacing of cross-sections in a hilly country is usually

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If the definition of a telescope is poor, it will produce a clear and district image.

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The bearing observed with a prismatic compass is

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An open cross-staff is commonly used for setting out

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To the sum of the first and last ordinates, add twice the sum of the intermediate ordinates. The total sum thus obtained is multiplied by the common distance between the ordinates. One-half of this product gives the required area. This rule of finding the area is called

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The adjustable cross-staff is used for setting out an offset

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