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  1. Device used as a standard for the calibration of pressure gauges is a

  2. A.
    bellow
    B.
    diaphragm
    C.
    dead weight pressure tester
    D.
    mercury manometer

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  3. X-rays are

  4. A.
    positively charged.
    B.
    negatively charged.
    C.
    neutral.
    D.
    of higher wavelength than visible light.

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  5. Diffusion co-efficient of a metal in a solid solution depends upon its

  6. A.
    composition
    B.
    temperature
    C.
    both (a) & (b)
    D.
    neither (a) nor (b)

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  7. Cast iron contains __________ percent carbon.

  8. A.
    2.5
    B.
    3.75
    C.
    4.75
    D.
    5.25

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  9. Alloys having more than 80% copper are generally more

  10. A.
    abrasion resistant.
    B.
    corrosion resistant.
    C.
    prone to season cracking.
    D.
    machinable.

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  11. Direct conversion of thermal energy to electrical energy is facilitated by the

  12. A.
    fuel cells.
    B.
    photo voltaic cell.
    C.
    magneto hydrodynamic generator.
    D.
    none of these.

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  13. The minimum carbon content in steel should be __________ percent for it to respond to a hardening treatment.

  14. A.
    0.2
    B.
    0.4
    C.
    0.6
    D.
    0.8

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  15. Angular displacement can be measured suitably by a

  16. A.
    shaft encoder.
    B.
    linear variable differential transducer (LVDT).
    C.
    stroboscope.
    D.
    tachometer.

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  17. Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air.

  18. A.
    wet bulb
    B.
    dry bulb
    C.
    saturation
    D.
    dew point

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  19. Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by

  20. A.
    conduction
    B.
    convection
    C.
    both 'a' & 'b'
    D.
    radiation

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