Process Equipment and Plant Design Objective Questions - ObjectiveBooks

Process Equipment and Plant Design Objective Questions

Practice Test: Question Set - 26

1. Pick out the wrong statement pertaining to the design of a basket type evaporator.
    (A) It is used for high viscosity liquor having large rate of scaling
    (B) The tube bundle is suspended on bracket
    (C) There is no central downtake
    (D) Downtake is formed by the annular space between the bundle and the shell

2. Diameter of bubble caps used in high pressure columns is _________ as compared to that used in identical vacuum columns.
    (A) Less
    (B) More
    (C) Same
    (D) Either (a) or (b); no generalization can be made

3. Liquid/petroleum fuel storage tanks are built underground (as in case of petrol pumps), when the storage capacity is less than _________ kiloliters.
    (A) 20
    (B) 30
    (C) 45
    (D) 85

4. In packed absorption tower, onset of flooding usually occurs at a pressure drop of about _________ mm of water column per meter height of packing.
    (A) 25-50
    (B) 50-75
    (C) 200-250
    (D) 750-1000

5. In a heat exchanger, shell side fluid velocity can be changed by changing the tube
    (A) Layout
    (B) Pitch
    (C) Both (a) & (b)
    (D) Neither (a) nor (b)

6. Which of the following lengths of heat exchanger tubes are normally not used in practice?
    (A) 2.5 meters
    (B) 6 meters
    (C) 10 meters
    (D) 0.5 meter

7. Steam side heat transfer co-efficient for design consideration under ordinary condition can be assumed to be about _________ kcal/hr.m2.°C.
    (A) 1250
    (B) 2500
    (C) 7500
    (D) 15000

8. The operating pressure drop range in a bag filter is about _________ mm water gauge.
    (A) 50-150
    (B) 5-10
    (C) 500-1500
    (D) 1500-2500

9. The safe distance of habitation from a hazardous chemical plant (TLV of its product < 1000 ppm) should be about _________ kms.
    (A) 1
    (B) 5
    (C) 15
    (D) 25

10. (Le/D) for fully open globe value may be around
    (A) 10
    (B) 25
    (C) 75
    (D) 300

11. In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer co-efficient (hi) vanishes after a Reynold number of
    (A) 1000
    (B) 3000
    (C) 5000
    (D) 10000

12. The value of fouling factor depends upon the
    (A) Characteristic of process fluid
    (B) Velocity of process fluid containing suspended solids
    (C) Suspended solids in the fluid
    (D) All (a), (b) and (c)

13. Pick out the wrong statement pertaining to a shell and tube heat exchanger.
    (A) The minimum value of baffle spacing is 50 mm
    (B) The maximum value of baffle spacing is equal to the I.D. of the shell
    (C) The maximum unsupported tube span is generally about 75 times tube diameter, but is reduced to about 60 times for aluminium, copper & alloys of these
    (D) Disk and doughnut baffle is the most commonly used baffle

14. Bracket supports are the most suitable for supporting _________ vessels.
    (A) Thick walled vertical
    (B) Horizontal
    (C) Thin spherical (e.g. Horton sphere)
    (D) None of these

15. In perforated plate towers, the
    (A) Hole sizes may be around 1/8" or 3/16"
    (B) Total hole area may be around 6 to 15% of tower cross-sectional area
    (C) Pressure drop is less compared is similar bubble cap towers
    (D) All (a), (b) and (c)

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