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  1. Case hardening is not done by

  2. A.
    nitriding
    B.
    hot dipping
    C.
    electroplating
    D.
    both b & c

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  3. Satellites burn off during re-entry to earth's atmosphere, because of the

  4. A.
    combustion with air.
    B.
    gravitational pull by earth.
    C.
    friction with earth's atmosphere.
    D.
    loss in weight of the satellite.

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  5. With increase in compression ratio, the volumetric efficiency of air compressor

  6. A.
    increases.
    B.
    decreases.
    C.
    remains same.
    D.
    may increase or decrease (depends on the suction pressure).

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  7. Neutrons are present in all atoms except that of

  8. A.
    He
    B.
    C
    C.
    H
    D.
    Ar

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  9. Biological shield in a nuclear reactor is generally provided to protect against the

  10. A.
    α-rays
    B.
    β-rays
    C.
    gamma rays & neutrons
    D.
    electrons

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  11. __________ circuit is most commonly used to measure strain with the help of a strain gauge.

  12. A.
    Ballast
    B.
    Voltage balancing potentiometric
    C.
    Simple current sensitive
    D.
    none of these

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  13. Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines ?

  14. A.
    Air filter
    B.
    Fuel injector
    C.
    Exhaust silencer
    D.
    Battery

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  15. __________ is a special constituent of chlorophyll without which photosynthesis is not possible.

  16. A.
    Calcium
    B.
    Nitrogen
    C.
    Phosphorous
    D.
    Hydrogen

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  17. __________ is used as a material of construction for the blade of power saw.

  18. A.
    Wrought iron
    B.
    Stainless steel
    C.
    Mild steel
    D.
    High speed steel

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  19. During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to

  20. A.
    time
    B.
    square root of time
    C.
    square of time
    D.
    cube of time

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