Surveying and Levelling

291. The method generally preferred to for contouring an undulating area, is

1. Chain surveying
2. Plane table surveying
3. Tacheometrical surveying
4. Compass surveying

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292. The method of finding out the difference in elevation between two points for eliminating the effect of curvature and refraction, is

1. Reciprocal levelling
2. Precise levelling
3. Differential levelling
4. Flying levelling

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293. The method of reversal

1. Is usually directed to examine whether a certain part is truly parallel or perpendicular to another
2. Makes the erroneous relationship between parts evident
3. Both (a) and (b)
4. Neither (a) nor (b)

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294. The methods used for locating the plane table stations are
(i) Radiation
(ii) Traversing
(iii) Intersection
(iv) Resection
The correct answer is

1. (i) and (ii)
2. (iii) and (iv)
3. (ii) and (iv)
4. (i) and (iii)

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295. The minimum range for sliding the focusing lens in the internal focusing telescope for focusing at all distances beyond 4 m is

1. 5 mm
2. 10 mm
3. 15 mm
4. 20 mm

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296. The most reliable method of plotting a theodolite traverse, is

1. By consecutive co-ordinates of each station
2. By independent co-ordinates of each station
3. By plotting included angles and scaling off each traverse leg
4. By the tangent method of plotting

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297. The number of horizontal cross wires in a stadia diaphragm is

1. One
2. Two
3. Three
4. Four

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298. The operation of making the algebraic sum of latitudes and departures of a closed traverse, each equal to zero, is known

1. Balancing the sights
2. Balancing the departures
3. Balancing the latitudes
4. Balancing the traverse

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299. The operation of resection involves the following steps
1. Rough orientation of the plane table
2. The three lines form a triangle of error
3. Drawing lines back through the three control points
4. Select a point in the triangle of error such that each ray is equally rotated either clockwise oranti clockwise
5. The points obtained by three rays are the correct location.
The correct sequence is

1. 1, 3, 2, 4, 5
2. 1, 2, 3, 4, 5
3. 1, 4, 3, 2, 5
4. 1, 3, 2, 4, 5

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300. The operation of revolving a plane table about its vertical axis so that all lines on the sheet become parallel to corresponding lines on the ground, is known

1. Levelling
2. Centering
3. Orientation
4. Setting

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