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chemical engineering process equipment and plant design MCQs

Practise multiple-choice questions from chemical engineering process equipment and plant design for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering process equipment and plant design Mcqs
1. Frame thickness in the plate and frame filter press is normally in the range of ______________ inches?
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A. 0.25 to 4

B. 1 to 12

C. 0.25 to 8

D. 1 to 5

2. Large process vessels operating under extreme temperature and pressure conditions are normally clad/ lined with materials like stainless steel, aluminium, nickel & its alloys, copper & its alloys and titanium. The cladding thickness is generally about ______________ percent of the total thickness?
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A. 30 to 40

B. 1 to 5

C. 10 to 20

D. 40 to 50

3. Scale up problem in design based on the similarity concept takes into account _______________ similarity?
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A. All A., B. and C.

B. Kinematic

C. Dynamic

D. Geometrical

4. High pressure fluid in a shell and tube heat exchanger should preferably be routed through the________________?
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A. Shell side for smaller total pressure drop

B. Shell side for large overall heat transfer co-efficient

C. Shell side, if the flow is counter-current and tube side if the flow is co-current

D. Tubes to avoid the expansion of high pressure shell construction
5. The LMTD correction factor (FT) is defined as the __________________?
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A. Ratio of LMTD to the true temperature difference

B. Ratio of true temperature difference to the LMTD

C. Geometric mean of the true temperature difference and the LMTD

D. Differenced of true temperature difference and the LMTD

6. In case of a thin pressure vessel, the ratio of its diameter to wall thickness is_________________?
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A. < 10

B. > 10

C. 30

D. > 20

7. In the allocated cap area, bubble caps are generally arranged on equilateral triangular pitch. Number of caps fixed on a plate is with a __________________?
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A. Neither A. nor B.

B. Either A. or B.

C. Cap pitch of 1.3-2 times the cap diameter

D. Clearance of 25-75 mm

8. At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure____________________?
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A. May increase or decrease depending upon the solubility of the gas in the liquid

B. Decreases

C. Remain same

D. Increases

9. Value of Peclet number = 0, is the representative of ____________________?
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A. Plug flow

B. Complete back mixing

C. Eddy diffusivity = 0

D. Laminar flow

10. The minimum baffle height should be ______________?
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A. Twice the impeller diameter

B. 3/4 of the tank height

C. Twice the tank diameter

D. Equal to the impeller diameter

11. In distillation columns, bubble caps are held in place over trays by ________________?
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A. Rivets

B. A hold down bar

C. Bolts

D. Both B. and C.
12. The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the _______________ stress?
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A. Allowable

B. None of these

C. Working

D. Damaging
13. Steam economy is defined as the amount of evaporation per unit amount of steam used, while the capacity is the total evaporation obtained per hour. Use of multiple effects in evaporation ?
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A. Increases capacity

B. Increases economy

C. Does not affect the capacity

D. Both B. & C.
14. For a cylindrical shell, (subject to the thickness of uppermost course being more than the minimum for dia of the tank in question), the thickness of the courses of shell_________________?
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A. ld be maintained inside the shell

B. May decrease or increase upwards depending upon whether vacuum or positive pressure

C. Decreases upwards

D. Remains same throughout

E. Increases upwards

15. In a shell and tube heat exchanger, the shortest centre to centre distance between the adjacent tubes is__________________?
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A. Called tube pitch

B. Always less than the diameter of the tube

C. Called tube clearance

D. None of these

16. Power required for agitation depends upon the______________________?
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A. Agitator type & speed of agitation

B. Height & properties of the liquid

C. Size of agitator & the tank

D. All A., B. and C.
17. What is the value of q for saturated vapor feed to a distillation column? (where q = fraction of the feed stream that is liquid ?
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A. 1

B. 0

C. 1

18. In case of plain carbon steel, butt welded joints are used for shell plate thickness ? _____________ cms?
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A. 3.8

B. 1.2

C. 0.5

D. 6.8

19. In a pressure vessel containing multiple openings of various dimensions at different parts, stress concentration at the edges of the opening is maximum which becomes negligibly small beyond the area covered by ______________ times the hole diameter?
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A. Ten

B. Two

C. Five

D. Twenty

20. The ratio of the largest load in a test to the original cross-sectional area of the test specimen is called the _____________ stress?
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A. None of these

B. Ultimate

C. Yield point

D. Breaking