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Chemical Engineering :: Fluid Mechanics

  1. Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates its

  2. A.
    inner diameter
    B.
    outer diameter
    C.
    thickness
    D.
    neither inner nor outer diameter

  3. I.D. of 1/4" schedule 40 pipe is 0.364". I.D. of a 1/2" schedule 40 pipe would be __________ inch

  4. A.
    4.728
    B.
    0.5
    C.
    0.622
    D.
    0.474

  5. A pump operating under specific conditions delivers insufficient quantity of liquid. This may be set right by

  6. A.
    decreasing the size of the inlet pipe.
    B.
    increasing the size of the inlet pipe.
    C.
    lowering the pump position.
    D.
    both (b) and (c).

  7. Two liquids manometer is used for measuring small pressure differences in

  8. A.
    liquids
    B.
    gases
    C.
    mixture of hydrocarbons
    D.
    none of these

  9. A piezometer provided in the pipe measures

  10. A.
    friction factor
    B.
    static pressure
    C.
    dynamic pressure
    D.
    none of these

  11. The pump used for irrigation purposes is generally designed for

  12. A.
    large capacity & high head.
    B.
    large capacity & low head.
    C.
    small capacity & high head.
    D.
    small capacity & low head.

  13. In centrifugal pumps, cavitation occurs, when pressure of the impeller eye or vane becomes

  14. A.
    less than atmospheric pressure.
    B.
    more than liquid vapor pressure.
    C.
    less than liquid vapor pressure.
    D.
    more than atmospheric pressure.

  15. Pressure gradient in the pipe flow is influenced by the

  16. A.
    diameter of pipe.
    B.
    velocity of the fluid.
    C.
    density & viscosity of the fluid.
    D.
    all (a), (b) and (c).

  17. __________ pump is the most suitable device for discharging a liquid against a pressure of ≥ 1500 kgf/cm2.

  18. A.
    Centrifugal
    B.
    Piston
    C.
    Plunger
    D.
    Vane

  19. Boiler feed water pump is usually a __________ pump.

  20. A.
    reciprocating
    B.
    gear
    C.
    multistage centrifugal
    D.
    diaphragm