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  1. Dislocations are __________ defects.

  2. A.
    point
    B.
    line
    C.
    volume
    D.
    none of these

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  3. The thickness of oxide film is y at time t. If K1, K2 and K3 are the temperature dependent constants, the parabolic law of oxidation is given by

  4. A.
    y2 = 2k1t + k2
    B.
    y = k1 ln (k2t + k3)
    C.
    y = k1 t + k2
    D.
    y = k1t3 + k2

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  5. Which of the following has the least value of ultimate tensile strength (UTS) ?

  6. A.
    Medium carbon steel
    B.
    High carbon steel
    C.
    Cast iron
    D.
    Wrought iron

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  7. Which of the following is a commonly used manometric liquid for low pressure range?

  8. A.
    Ethyl alcohol
    B.
    Carbon tetrachloride
    C.
    Glycerol
    D.
    Ethylene glycol

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  9. The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength.

  10. A.
    creep
    B.
    endurance
    C.
    fatigue
    D.
    none of these

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  11. Temperature profile along the length of a gas-gas counter flow heat exchanger is correctly represented by

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  13. Metal shots used in shot blasting are made of

  14. A.
    stellite
    B.
    steel
    C.
    bronze
    D.
    lead

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  15. At the point of boundary layer separation in fluid flow, the

  16. A.
    shear stress is maximum.
    B.
    velocity gradient is flat.
    C.
    density variation is maximum.
    D.
    shear stress is zero.

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  17. Brinell Hardness Number (BHN) for talc is approximately in the range of

  18. A.
    1-5
    B.
    20-30
    C.
    100-150
    D.
    200-250

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  19. A spring material should have low

  20. A.
    elastic limit
    B.
    deflection value
    C.
    fatigue resistance
    D.
    none of these

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