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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. The most ideal disinfectant used for drinking water throughout the world, is

    • Options
    • A. alum
    • B. lime
    • C. chlorine
    • D. nitrogen
    • E. ammonia.
      • Discuss
    • 2. The top soil of a water logged field becomes more alkaline and infertile if its pH value is

    • Options
    • A. 6
    • B. 8
    • C. 9
    • D. 10
    • E. 11
      • Discuss
    • 3. The desired sensitivity of a bubble tube with 2 mm divisions is 30". The radius of the bubble tube should be

    • Options
    • A. 13.75 m
    • B. 3.44 m
    • C. 1375 m
    • D. none of these.
      • Discuss
    • 4. The masses of two balls are in the ratio of 2 : 1 and their respective velocities are in the ratio of 1 : 2 but in opposite direction before impact. If the coefficient of restitution is , the velocities of separation of the balls will be equal to

    • Options
    • A. original velocity in the same direction
    • B. half the original velocity in the same direction
    • C. half the original velocity in the opposite direction
    • D. original velocity in the opposite direction
      • Discuss
    • 5. The whole circle bearing of a line is 290°. Its reduced bearing is

    • Options
    • A. N 20° E
    • B. N 20° W
    • C. N 70° W
    • D. S 70° E
      • Discuss
    • 6. Brittleness of cold is due to an excess of

    • Options
    • A. sulphur
    • B. carbon
    • C. phosphorus
    • D. silicon.
      • Discuss
    • 7. Cavitation is caused by

    • Options
    • A. high velocity
    • B. low pressure
    • C. high pressure
    • D. high temperature
      • Discuss
    • 8. Indian Road Congress (I.R.C.) was founded and constituted with its head quarters at New Delhi, in

    • Options
    • A. 1924
    • B. 1927
    • C. 1930
    • D. 1934
    • E. 1942
      • Discuss
    • 9. The layers of vegetable wastes and night soil alternatively piled above the ground to form a mound, is called

    • Options
    • A. a heap
    • B. plateu
    • C. windrow
    • D. none of these.
      • Discuss
    • 10. In network of pipes

    • Options
    • A. the algebraic sum of discharges around each circuit is zero
    • B. the algebraic sum of (pressure + datum) head drops around each circuit is zero
    • C. the elevation of hydraulic grade line is assumed for each junction point
    • D. elementary circuits are replaced by equivalent pipes
      • Discuss

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