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  • Question

  • The thickness of heat transfer plates used in the plate type heat exchanger ranges from __________ mm, pressed in a single piece provided with grooves & corrugations.


  • Options
  • A. 0.3 to 0.8
  • B. 1.25 to 3.125
  • C. 3.5 to 7.0
  • D. 8-12

  • Correct Answer
  • 1.25 to 3.125 

    • Process Equipment and Plant Design problems

    Search Results

    • 1. With increase in pressure drop (for a given particle size), the dust collection efficiency of a cyclone separator will

    • Options
    • A. increase
    • B. decrease
    • C. remain unaffected
    • D. increase or decrease depending on the nature of the dust.
      • Discuss
    • 2. The most common standard size of bubble caps used in industrial operation is

    • Options
    • A. 1" dia cap with 0.5" dia riser.
    • B. 6" dia cap with 4" dia riser.
    • C. 8" dia cap with 1" dia riser.
    • D. 4" dia cap with 8" dia riser.
      • Discuss
    • 3. Which of the following is used to set the diameter of the distillation column?

    • Options
    • A. Number of theorectical plates.
    • B. Static submergence.
    • C. Allowable vapour velocity.
    • D. Length of straight rectangular weir on cross-flow tray.
      • Discuss
    • 4. Saddle supports are used for supporting __________ vessels.

    • Options
    • A. horizontal cylinderical
    • B. tall vertical
    • C. thick walled vertical
    • D. thick spherical
      • Discuss
    • 5. Needle valves are generally not used for

    • Options
    • A. very large diameter pipes.
    • B. high pressure throttling service.
    • C. very accurate flow control.
    • D. smaller sizes of pipe.
      • Discuss
    • 6. Cooling water fouling factors vary in the range of 0.001 to 0.003

    • Options
    • A. (BTU/hr.ft2 . °F)-1
    • B. (kcal/hr.m2 .°C)-1
    • C. (W/m2.°K)-1
    • D. (kcal/hr. m. °C)-1
      • Discuss
    • 7. Optimum reflux ratio in a continuous distillation column is determined by the

    • Options
    • A. maximum permissible vapour velocity.
    • B. flooding limit of the column.
    • C. total cost consideration (fixed cost of the column plus the cooling water & steam cost).
    • D. none of these.
      • Discuss
    • 8. Multiple blade paddle agitator is used for mixing high viscosity liquids/paste in which the paddle diameter is commonly 0.8 times the tank diameter. However, the width of the blade is in the range of __________ times the paddle diameter.

    • Options
    • A. 0.1 to 0.25
    • B. 0.3 to 0.5
    • C. 0.5 to 0.6
    • D. 0.65 to 0.80
      • Discuss
    • 9. Rivets are generally specified by the

    • Options
    • A. head diameter
    • B. shank diameter
    • C. overall length
    • D. none of these
      • Discuss
    • 10. An underdesigned steam trap will

    • Options
    • A. waste steam.
    • B. destroy itself of acceleration wear due to rapid recycling.
    • C. back up condensate and cause water hammer in steam line.
    • D. none of these.
      • Discuss

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