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  1. A material expanding freely due to heating will develop __________ stress.

  2. A.
    no
    B.
    compressive
    C.
    tensile
    D.
    thermal

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  3. A machine having assumed life of 20 years is purchased for Rs 32000/-. Its scrap value at the end of its life is Rs 8000/-. If the depreciation is calculated by diminishing balance method, then percentage reduction in its value at the end of first year is __________ percent.

  4. A.
    6.7
    B.
    7.6
    C.
    10.3
    D.
    15.2

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  5. More than 1000 tons refrigeration capacity plants are usually of __________ type.

  6. A.
    vapour compression
    B.
    vapour absorption
    C.
    air refrigeration
    D.
    none of these

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  7. Pick out the wrong statement.

  8. A.
    In a thin spherical shell under internal pressure, hoop stress is equal to the half of axial stress.
    B.
    Thermoplastic material does not follow Hooke's law of elasticity.
    C.
    Components under longitudinal compression is called 'struts' and the load under which strut fails is called crippling or buckling load.
    D.
    At low temperatures (sub-zero) in pressure vessels, the ductility of metal diminishes and brittle fracture occurs while at high temperature in pressure vessels, embrittlement of material may take place.

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  9. The increase in hardness of metal due to its cold working is termed as the __________ hardening.

  10. A.
    work
    B.
    age
    C.
    induction
    D.
    flame

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  11. The maximum axial compression stress during cold upsetting of a cylinderical rod of radius (r) occurs at

  12. A.
    the outer edge of the rod.
    B.
    r/3 from the centre.
    C.
    r/2 from the centre.
    D.
    the centre.

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  13. Electrode potential is not concerned with the measurment of

  14. A.
    pH value
    B.
    temperature
    C.
    viscosity
    D.
    density

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  15. __________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.

  16. A.
    Packed
    B.
    Bubble
    C.
    Spray
    D.
    Tray

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  17. Tungsten in high speed steel is responsible for its

  18. A.
    toughness & wear resistance
    B.
    cold hardness
    C.
    hot hardness
    D.
    sharp cutting edge

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