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Civil Engineering :: Surveying

  1. With standard meridian as 82° 30' E the standard time at longitude 90° E is 8 h 30 m. The local mean time at the place will be

  2. A.

     7 h 00 m

    B.

     7 h 30 m

    C.

     8 h 00 m

    D.

     9 h 00 m


  3. In a truly vertical photograph,

  4. A.

     Principal point coincides the isocenter

    B.

     Iso-centre coincides the plumb point

    C.

     Plumb point coincides the principal point

    D.

     All the above


  5. Polaris is usually observed for the determination of the latitude when it is

  6. A.

     At culmination

    B.

     At elongation

    C.

     Neither at culmination nor at elongation

    D.

     Either at culmination or at elongation


  7. The parallax of a point on the photograph is due to

  8. A.

     Ground elevation

    B.

     Flying height

    C.

     Length of air base

    D.

     All the above


  9. To have greatest coverage of the area, the type of photography used, is

  10. A.

     High oblique

    B.

     Low oblique

    C.

     Vertical

    D.

     None of these


  11. Which of the following methods of theodolite traversing is suitable for locating the details which are far away from transit stations?

  12. A.

     Measuring angle and distance from one transit station

    B.

     Measuring angles to the point from at least two stations

    C.

     Measuring angle at one station and distance from other

    D.

     Measuring distance from two points on traverse line


  13. Horizontal distances obtained by thermometric observations

  14. A.

     require slope correction

    B.

     require tension correction

    C.

     require slope and tension corrections

    D.

     do not require slope and tension corrections


  15. A star may culminate at zenith if its declination is

  16. A.

     Greater than the longitude of the place

    B.

     Less than the latitude of the place

    C.

     Equal to the latitude of the place

    D.

     None of these


  17. Which of the following statements is incorrect ?

  18. A.

     Error due to refraction may not be completely eliminated by reciprocal levelling.

    B.

     Tilting levels are commonly used for precision work.

    C.

     The last reading of levelling is always a foresight.

    D.

     All of the above statements are incorrect.


  19. The displacement of the pictured position of a point of h elevation on a vertical photograph taken with a camera of 30 cm focal length, from an altitude of 3000 m, is

  20. A.

     4.4 mm

    B.

     5.5 mm

    C.

     6.5 mm

    D.

     7.5 mm