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  1. The best criterion for analysing an economic investment is the

  2. A.
    rate of return criterion.
    B.
    present value method.
    C.
    salvage value.
    D.
    future value method.

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  3. Deformation band is absent in materials having __________ lattice crystal structure.

  4. A.
    fcc
    B.
    bcc
    C.
    hcp
    D.
    none of these

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  5. Out of the following, the rays having the lowest wavelength is the

  6. A.
    radio waves
    B.
    ultrasonic waves
    C.
    infra red rays
    D.
    X-rays

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  7. A fine grained grinding wheel should not be used for grinding __________ materials.

  8. A.
    hard
    B.
    brittle
    C.
    soft & ductile
    D.
    none of these

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  9. What is the effect on the performance of the economiser in the thermal power plant boiler, if the feed water temperature is very low due to preheaters being out for repairs or starving of steam supply ?

  10. A.
    It results in corrosion due to the condensation on the flue gas side of the economiser tubes due to handling of low temperature water.
    B.
    Economiser tube life increases due to handling of low temperature water.
    C.
    Heat transfer efficiency of economiser increases due to picking up high heat from the flue gases.
    D.
    Scale formation rate on economiser tubes increases.

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  11. The bulk modulus of a material with Poisson's ratio of 0.5 is equal to

  12. A.
    3 x Young's modulus
    B.
    Young's modulus
    C.
    infinity
    D.
    zero

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  13. Compression ratio of an I.C. engine is the ratio of the

  14. A.
    clearance volume to the volume swept by piston per stroke.
    B.
    volume of air in cylinder before compression to that after compression.
    C.
    pressure after compression to that before compression.
    D.
    none of these

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  15. Two stroke engine compared to a four stroke engine has

  16. A.
    higher efficiency.
    B.
    less fuel consumption.
    C.
    higher power to weight ratio.
    D.
    lower initial cost.

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  17. Ferrites are __________ magnetic.

  18. A.
    anti
    B.
    para
    C.
    ferri
    D.
    ferro

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  19. The pH value is the measure of hydrogen ion concentration in a solution. The term pH stands for the __________ in the solution.

  20. A.
    power of hydrogen ion concentration
    B.
    percentage of hydrogen ions
    C.
    presence of hydrogen ions
    D.
    none of these

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