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  1. Ammonia leakage in the refrigeration system is detected by

  2. A.
    sulphur stick, which on detection gives white smoke.
    B.
    using chemical reagents.
    C.
    its smell.
    D.
    soap solution.

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  3. Fibre glass is a composite material of

  4. A.
    glass fibre in a polymer matrix.
    B.
    glass fibre in a metallic matrix.
    C.
    polymer fibre in a glassy matrix.
    D.
    both 'b' & 'c'.

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  5. According to thermodynamic Farenhite scale, the fundamental interval between ice point to steam point is

  6. A.
    180°
    B.
    212°
    C.
    32°
    D.
    273°

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  7. Maximum consumption of limestone is in the __________ industry.

  8. A.
    iron and steel
    B.
    cement
    C.
    glass
    D.
    fertiliser

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  9. Austenite is not

  10. A.
    ductile
    B.
    malleable
    C.
    magnetic
    D.
    soft

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  11. Factor of safety in machine design is defined as the ratio of ultimate stress to __________ stress.

  12. A.
    working
    B.
    bearing
    C.
    yield
    D.
    none of these

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  13. Out of the following, the __________ pipe has the least corrosion resistance.

  14. A.
    mild steel
    B.
    copper
    C.
    cast iron
    D.
    wrought iron

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  15. With increase in steam pressure, its specific volume decreases

  16. A.
    rapidly first and then slowly.
    B.
    linearly.
    C.
    slowly first and then rapidly.
    D.
    exponentially.

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  17. Which of the following rays has the least wavelength?

  18. A.
    Ultraviolet rays
    B.
    Infrared rays
    C.
    Cosmic rays
    D.
    X-rays

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  19. Hydrocyclone is a

  20. A.
    crusher
    B.
    wet classifier
    C.
    dry classifier
    D.
    magnetic separator

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