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
Next Tests: