Discussion
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- Question
If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will __________ times.
Options- A. increase by 1.8
- B. decrease by 22
- C. increase by 21.6
- D. none of these
- Correct Answer
- increase by 21.6
- 1. 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
- 2. 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
- 3. 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
- 4. 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
- 5. 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
- 6. In the downcomer of a distillation column, the minimum recommended residence time is about __________ seconds.
Options- A. 2.5
- B. 5
- C. 12.5
- D. 17.5 Discuss
- 7. Bubble cap plate column is
Options- A. a finite stage contactor.
- B. used only for distillation, not for absorption.
- C. a differential stage contactor.
- D. a continuous contactor. Discuss
- 8. In case of 1.5" heat exchanger tubes, the inside flow area __________ with decrease in BWG.
Options- A. increases
- B. decreases
- C. remains same
- D. none of these Discuss
- 9. For turbine agitator, the impeller diameter is about
Options- A. 0.3 to 0.5 d
- B. 0.1 to 0.2 d
- C. 0.65 to 0.85 d
- D. 0.95 d Discuss
- 10. Which tube arrangement in a heat exchanger would facilitate highest heat transfer rate?
Options- A. Triangular pitch.
- B. Square pitch.
- C. Diagonal square pitch.
- D. Heat transfer rate is independent of tube arrangement. Discuss
Process Equipment and Plant Design problems
Search Results
Correct Answer: To increase the tube side heat transfer co-efficient by inducing turbulence.
Correct Answer: 0.07 - 0.12
Correct Answer: both (a) & (b).
Correct Answer: 4 A/P
Correct Answer: 0.1-0.12
Correct Answer: 5
Correct Answer: a finite stage contactor.
Correct Answer: decreases
Correct Answer: 0.3 to 0.5 d
Correct Answer: Triangular pitch.
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