400. Pick up the correct statement from the following :

A. The method of measuring angular measurements in degrees, minutes and seconds, is called the sexagesimal system

B. The method of measuring angular measurements in grades, centesimals and centecentesimals, is called centesimal system

C. Incentesimal system, angles are expressed as decimals

D. All the above.

401. Pick up the correct statement from the following :

A. Mass haul diagrams is of great value inplanning and construction of railway/road embankments

B. The aggregate volumes of earthwork quantities are plotted as ordinates

C. The distance specified for transporting the excavated anaterial in the bill estimate, is called free-haul

D. All the above.

402. Pick up the planetable method which needs the help of other planetable for surveying the entire area completely from the following

A. Method of radiation

B. Method of intersection

C. Method of resection

D. Method of traversing.

403. Pick up the correct statement regarding the nautical sextant from the following :

A. It contains a 60? arc divided in degrees.

B. Its index glass is wholly silvered and pivoted at the pivot end of index arm.

C. Its horizon glass is half-silvered glass.

D. All the above.

404. Assume that a and 13 are the angles of elevations of two points. If the observed horiontal angle by a sextant is 0 then the true horizontal angle is

A. is n 0 - sin a . sin 13

B.cos 0 - cos a . cos 13

C.sin 0 + sin a. sin 13

D. cos 0 - cos a. cos 13

405. Which one of the following statements is not correct in respect of a prismatic compass :

A. It consists of a glass-topped case of diameter 114 mm.

B. An engine-divided aluminium ring carrying the needle rotates on a jewelled centre

C. The scale is divided round the ring from 0? to 360? in degrees and half degree in an anticlock wise direction

D. The zero reading is engraved at the south end of the graduated ring.

406. The actual staff intercept (Si) for a 6? tilt and 0 angle of slope is obtained from the following formula s cos 0 Si - cos (0 - 6) provided : -

A. the vertical angle 0 is not greater than ? 30?

B. The vertical angle 0 is always greater than angle of tilt 6

C. The angle of tilt is small and not greater than 3?

D. All the above.

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