| 1. | Rise and fall method is used in ? | |
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heck levelling
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profile levelling
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none of these
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differential levelling
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Report Question| 2. | According to Lehman's rule of plane tabling ? | |
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when looking in the direction of the reference points, the point sought is on the same side of each of the three rays
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the distance to the point sought from each of the three rays is proportional to the distance of the three known points from the instrument station
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when the instrument station is outside the great circle, the point sought is always on the same side of the ray drawn to the most distant point as the intersection of the other two rays
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all of the above
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| 3. | When the latitudes and departures are so adjusted that the algebraic sum of the latitudes and departures are equal to zero, the operation is called ? | |
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balancing the traverse
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balancing the departure
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balancing the latitude
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none of these
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| 4. | The deflection angle may have any value between ? | |
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0° and 45°
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0° and 90?
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0° and 120?
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0° and 180°
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| 5. | The distance between the midpoint of the long chord and the mid-point of the curve, is equal to ? | |
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R (1-sin ?)
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R (1-cos ?)
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R(1- sin ?/2)
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R (1-cos ?/2)
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| 6. | In levelling, the effect of refraction may be taken as ........... of that due to curvature ? | |
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one-half
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one-third
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one-fifth
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one-seventh
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| 7. | The method of surveying used for determining the relative height of points on the surface of the earth is called ? | |
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levelling
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differential levelling
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simple levelling
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longitudinal levelling
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| 8. | Collimation method is used in ? | |
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check levelling
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profile levelling
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differential levelling
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both (a) and (b)
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| 9. | In levelling, the correction for combined curvature and refraction (in metres) is equal to ? | |
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0.0785 D²
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0.00785 D²
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0.0673 D²
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0.0112 D²
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| 10. | The length of a long chord is equal to ? | |
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R sin ?
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R cos ?
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2 R sin ?/2
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2 R cos ?/2
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