Online Quiz Questions Process Equipment and Plant Design - Set 20 - ObjectiveBooks

Online Quiz Questions Process Equipment and Plant Design - Set 20

Practice Test: Question Set - 20

1. In the design of a shell and tube heat exchanger, the corrosion allowance
    (A) Need not be provided for non-pressure parts like tie rods, spacers, baffles, supports etc.
    (B) For carbon steel and cast iron pressure parts is 1.5 mm (except for tubes) and for severe conditions it is 3 mm
    (C) For internal cover and tube sheet is provided on both the sides
    (D) All (a), (b) & (c)

2. Vapor velocity in a distillation column for non-foaming mixture is in the range of _________ times the flooding velocity.
    (A) 0.1 to 0.3
    (B) 0.6 to 0.7
    (C) 0.85 to 0.95
    (D) 1.5 to 2

3. _________ strain is measured using a 'strain rosetter'.
    (A) Volumetric
    (B) Shear
    (C) Linear
    (D) None of these

4. Nominal size of a pipe is an indication of its _________ diameter.
    (A) Inner
    (B) Outer
    (C) Approximate
    (D) None of these

5. The minimum plate spacing in most of the petroleum refinery distillation columns (of dia > 3 ft) is normally _________ inches.
    (A) 6
    (B) 12
    (C) 18
    (D) 36

6. In packed towers provided with saddle packing, liquid redistributors are positioned at every _________ times column diameter or 6 meters whichever is less.
    (A) 2-3
    (B) 5-8
    (C) 10-15
    (D) 20-25

7. _________ shaped roof is most commonly used for cylindrical tanks.
    (A) Cone
    (B) Dome
    (C) Umbrella
    (D) Flat

8. The ideal size of round bubble caps to be used in industrial distillation column having a diameter of 3-6 meters is _________ cms.
    (A) 5
    (B) 15
    (C) 7.5
    (D) 50

9. (Le/D) for fully open gate valves would be
    (A) Much more than that for fully open globe valves
    (B) Much less (say 2% than that for fully open globe valves)
    (C) Around 7
    (D) Both (b) and (c)

10. Excessive liquid gradient on a tray may result in the
    (A) Maldistribution of gas
    (B) Back trapping
    (C) Gas blowing beneath cap skit
    (D) All (a), (b) and (c)

11. Smoker's equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the
    (A) Relative volatility is close to one (e.g., separation of close boiling isomers)
    (B) Feed is not at its bubble point
    (C) Number of equilibrium stages in only stripping section is to be calculated
    (D) Number of equilibrium stages required is likely to be very small

12. An under-designed steam trap will
    (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

13. In actual operation of a bubble cap distillation tower, the _________ at the bottom of the tower is more than that at the top of the tower.
    (A) Molal flow rate of vapor
    (B) Vapor molecular weight
    (C) Pressure and temperature
    (D) All (a), (b) and (c)

14. Baffles may be eliminated for
    (A) Low viscosity liquids (< 200 poise)
    (B) High viscosity liquids (> 600 poise)
    (C) Large diameter tanks
    (D) None of these

15. In a _________ riveted joint, the rivets in the various rows are opposite to each other.
    (A) Zig-zag
    (B) Chain
    (C) Diamond
    (D) None of these

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