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  • Question

  • The Huygen's telescope eye piece


  • Options
  • A. is aplanatic
  • B. achromatic
  • C. both (a) and (b)
  • D. neither (a) nor (b).

  • Correct Answer
  • both (a) and (b) 

    • More questions

    • 1. A beam of length L supported on two intermediate rollers carries a uniformly distributed load on its entire length. If sagging B.M. and hogging B.M. of the beam are equal, the length of each overhang, is

    • Options
    • A. 0.107 L
    • B. 0.207 L
    • C. 0.307 L
    • D. 0.407 L
    • E. 0.5 L.
      • Discuss
    • 2. In Indian railways, the ratio of axle load and weight of rail, is

    • Options
    • A. 312
    • B. 412
    • C. 512
    • D. 600
      • Discuss
    • 3. According to the recommendations of IS : 456-1978, the expansion joints

    • Options
    • A. are provided where plane changes abruptly
    • B. are provided to ensure minimum resistance
    • C. are supported on separate columns
    • D. do not carry reinforcement across them
    • E. all the above.
      • Discuss
    • 4. For lifting a load of 50 kg through a distance of 2.5 cm, an effort of 12.5 kg is moved through a distance of 40 cm. The efficiency of the lifting machine, is

    • Options
    • A. 60%
    • B. 65%
    • C. 70%
    • D. 75%.
      • Discuss
    • 5. For clear distinct vision, images of obstructions should fall on the retina with a cone of

    • Options
    • A. 2°
    • B. 3°
    • C. 4°
    • D. 5°
    • E. 6°
      • Discuss
    • 6. Full amount of extra width of a pavement on the curve, is provided at

    • Options
    • A. beginning of the transition curve
    • B. centre of the transition curve
    • C. beginning of the circular curve
    • D. centre of the circular curve.
      • Discuss
    • 7. Imhoff cone is used to determine

    • Options
    • A. settlable solids
    • B. suspended solids
    • C. dissolved solids
    • D. none of these.
      • Discuss
    • 8. The economical depth d of a web plate in which allowable bearing stress is fb, and the maximum bending moment is M, as suggested by Rawater and Clark, is

    • Options
    • A.
    • B.
    • C.
    • D.
    • E.
      • Discuss
    • 9. If q is the discharge per unit width of a channel and D1 D2 are the depths of water before and after hydraulic jump, the following relationship is true

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. The width of the right of way in urban area, is kept between 24 m to 60 m for

    • Options
    • A. National Highways
    • B. State Highways
    • C. Both (a) and (b)
    • D. None of these.
      • Discuss

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