Process Equipment and Plant Design problems
- 1. __________ head is the most economical for cylindrical vessels designed for operating at high pressure (> 15 atm.).
Options- A. Hemispherical
- B. Dished
- C. Ellipsoidal
- D. Conical Discuss
Correct Answer: Ellipsoidal
- 2. The distance between the top of the slots and the liquid surface when the static liquid is just ready to flow over the overflow weir is called
Options- A. downcomer liquid seal
- B. static submergence
- C. skirt clearance
- D. none of these Discuss
Correct Answer: static submergence
- 3. The approximate liquid depth in an agitation tank is equal to (where, d = tank diameter)
Options- A. 0.5 d
- B. 0.75 d
- C. d
- D. 2 d Discuss
Correct Answer: d
- 4. For given number of passes, pitch & tube diameter, the maximum number of tubes that can be accommodated in a shell of tripled inside diameter will be __________ times.
Options- A. about 9
- B. considerably more than 9
- C. considerably less than 9
- D. about 3 Discuss
Correct Answer: considerably more than 9
- 5. A binary liquid azeotropic mixture has boiling point lower than either of the components, when it shows __________ deviation from Raoult's Law.
Options- A. positive
- B. negative
- C. no
- D. none of these Discuss
Correct Answer: positive
- 6. Baffle width is normally taken as __________ times the tank diameter.
Options- A. 0.1-0.12
- B. 0.4-0.5
- C. 0.45-0.6
- D. 0.2-0.45 Discuss
Correct Answer: 0.1-0.12
- 7. The equivalent diameter for fluid flow through a channel of constant non-circular cross section of area 'A' is given by (where, P = perimeter of the channel in contact with the fluid)
Options- A. 4 A/P
- B. A/P
- C. 4 P/A
- D. A Discuss
Correct Answer: 4 A/P
- 8. Larger depth of liquid on the trays of a distillation column
Options- A. leads to high tray efficiency.
- B. results in higher pressure drop per tray.
- C. both (a) & (b).
- D. neither (a) or (b). Discuss
Correct Answer: both (a) & (b).
- 9. Pressure drop per tray in the atmospheric distillation column is about __________ psi.
Options- A. 0.01 - 0.5
- B. 0.07 - 0.12
- C. 0.5 - 1.0
- D. 1 - 3 Discuss
Correct Answer: 0.07 - 0.12
- 10. The centre to centre distance between two consecutive baffles in a shell and tube heat exchanger is called the baffle pitch or baffle spacing, which is more than 1/5th the I.D. of the shell. Which of the following is not a function of the baffles?
Options- A. To increase the residence time of shell side fluid.
- B. To provide support to the tube bundle.
- C. To reduce the induced vibration in the tubes.
- D. To increase the tube side heat transfer co-efficient by inducing turbulence. Discuss
Correct Answer: To increase the tube side heat transfer co-efficient by inducing turbulence.
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