Process Equipment and Plant Design pdf Practice Test - Set 05 - ObjectiveBooks

Process Equipment and Plant Design pdf Practice Test - Set 05

Practice Test: Question Set - 05

1. The ratio of the largest load in a test to the original cross-sectional area of the test specimen is called the _________ stress.
    (A) Yield point
    (B) Breaking
    (C) Ultimate
    (D) None of these

2. Liquid gradient over a tray can be minimized by
    (A) Providing a higher skirt clearance or a higher weir
    (B) Decreasing the number of rows of caps through which the liquid flows or by decreasing the velocity of liquid flow past the caps or by reducing the distance along the tray through which the liquid must flow
    (C) Using split flow, radial flow or cascade flow for column diameter large than 4 ft
    (D) All (a), (b) and (c)

3. Factor of safety (i.e., overdesign factor) in heat transfer equipments is about __________ percent more than the actual/theoretical design factor.
    (A) 5-10
    (B) 15-20
    (C) 30-35
    (D) 35-40

4. Slope of counter-current flow rotary drier is in the range of __________ meter/meter.
    (A) 0 to 0.08
    (B) 0 to 0.8
    (C) 0 to 1.5
    (D) 0 to 2.2

5. Wind load consideration in the design of a support can be neglected, when the vessel is
    (A) Tall (say 30 meters), but is full of liquid
    (B) Tall but empty
    (C) Short (< 2 m) and housed indoor
    (D) None of these

6. In a multiple effect evaporator system having 'n' effects, the amount of water evaporated per unit surface area in approximately equal to _________ times that in a single effect.
    (A) nth
    (B) (1/n)th
    (C) 0.5 nth
    (D) 1.5 nth

7. Heat transfer co-efficient for a horizontal condenser as compared to a vertical condenser operating under similar conditions is
    (A) Same
    (B) Less
    (C) About 3 times
    (D) About 0.33 times

8. Tubes are fixed to the tube sheet (a thick circular metallic plate) by the method of tube rolling and brazing (non-removable) or ferrule connection (removable). Thickness of the tube, sheet is normally _________ the outside diameter of the tube but in no case it should be less than 22 mm (7/8").
    (A) Half
    (B) Three fourth
    (C) Equal to
    (D) 1.5 times

9. For identical operating conditions, the pressure drop over _________ tray is the highest out of the following.
    (A) Sieve
    (B) Valve
    (C) Counter flow
    (D) Bubble cap

10. Maximum plate efficiency is achieved in case of _________ flow.
    (A) Split
    (B) Cross
    (C) Cascade
    (D) Reverse

11. In a shell and tube heat exchanger having square pitch, the shell side equivalent diameter is given by (where, P = pitch, d = outside diameter of the tube)
    (A) 4(P2 - πd2/4)/πd
    (B) (P2 - rd2/4)/rd
    (C) 4P2/πd
    (D) πd/4P2

12. Diameter of the sieve tray column is determined by the
    (A) Lower limit of vapor velocity
    (B) Upper limit of the vapor velocity
    (C) Hole diameter of the sieve tray
    (D) Height of the plate spacing

13. In the allocated cap area, bubble caps are generally arranged on equilateral triangular pitch. Number of caps fixed on a plate is with a
    (A) Clearance of 25-75 mm
    (B) Cap pitch of 1.3-2 times the cap diameter
    (C) Either 'a' or 'b'
    (D) Neither 'a' nor 'b'

14. (Le/D) for 90° elbow (medium radius) and 90°square elbow would be respectively around
    (A) 25 and 60
    (B) 3 and 5
    (C) 100 and 250
    (D) 250 and 600

15. Maximum acceptable total liquid gradient over a tray is about _________ mm.
    (A) 5.5
    (B) 12.5
    (C) 30.5
    (D) 45.5

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