surveying civil-engineering question and answers -Page 30

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2. Pick up the correct statement from the following :
Options
A. to locate a gross error in bearing that may exist in controlled theodolite traverse, we may plot the traverse from each end. The traverse station having the same coordinates by each route is the one where the error lies
B. to locate a gross error in bearing, in a controlled traverse, we plot the traverse and the station through which perpendicular to sector of the closing line passes is the station at which the error was made
C. to locate a gross error due to taping in a controlled traverse, we plot the traverse to a convenient scale. The bearing of the closing error will be approximately the same as that of the leg in which the gross error consists
D. all the above.

4. Whole circle bearing of a line is preferred to a quadrantal bearing merely because
Options
A. bearing is not completely specified by an angle
B. bearing is completely specified by an angle
C. Sign of the correction of magnetic declination is different in different quadrants
D. its trigonometrical values may be extracted from ordinary tables easily.

5. An internal focussing type surveying telescope, may be focussed by the movement of
Options
A. objective glass of the telescope
B. convex-lens in the telescope
C. concave lens in the telescope
D. plano-convex lens in the telescope.

6. If the length of a transition curve to be introduced between a straight and a circular curve of radius 500 m is 90 m, the maximum deflection angle to locate its junction point, is
Options
A. 1�43' 08"
B. 1�43' 18"
C. 1�43' 28"
D. 1�43' 38"

7. Pick up the correct statement from the following :
Options
A. The horizontal angle between magnetic meridian and true meridian at a place is called magnetic declination or variance of the compass
B. the imaginary lines which pass through points at which the magnetic declinations are equal at a given time are called isogonic lines
C. the isogonic lines through places at which the declination is zero are termed agonic lines
D. all the above.

9. Surveys which are carried out to provide a national grid of control for preparation of accurate maps of large areas, are known
Options
A. plane surveys
B. geodetic surveys
C. geographical surveys
D. topographical surveys.

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