Surveying and Levelling

241. The bearings of the lines AB and BC are 146° 30' and 68° 30'. The included angle ABC is

1. 102°
2. 78°
3. 45°
4. None of these

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242. The bearings of two traverse legs AB and BC are N52° 45' E and N34° 30' E respectively. The deflection angle is

1. 18° 15' E
2. 18° 15' N
3. 18° 15' W
4. 18° 15' L

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243. The best method of interpolation of contours, is by

1. Estimation
2. Graphical means
3. Computation
4. All of these

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244. The boundary of water of a still lake represents

1. Level surface
2. Horizontal surface
3. Contour line
4. A concave surface

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245. The branch of surveying in which both horizontal and vertical positions of a point, are determined by making instrumental observations, is known

1. Tacheometry
2. Tachemetry
3. Telemetry
4. All the above

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246. The bubble tube is nearly filled with

1. Alcohol or chloroform
2. A liquid which is very mobile
3. A liquid having low freezing point
4. All the above

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247. The chaining on sloping ground is

1. Easier along the falling gradient
2. Easier along the up gradient
3. Equally convenient along falling as well as up gradient
4. All the above

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248. The chord of a curve less than peg interval, is known as

1. Small chord
2. Sub-chord
3. Normal chord
4. Short chord

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249. The combined effect of curvature and refraction over a distance 'L kilometres is

1. 67.2 L² mm
2. 76.3 L² mm
3. 64.5 L² mm
4. None of these

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250. The constant vertical distance between two adjacent contours, is called

1. Horizontal interval
2. Horizontal equivalent
3. Vertical equivalent
4. Contour interval

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