Discussion
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- Question
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
- Correct Answer
- decreases
- 1. 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
- 2. 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
- 3. 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 Discuss
- 4. 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
- 5. 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
- 6. 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
- 7. 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
- 8. Cylindrical pressure vessels in horizontal condition is generally supported on a __________ support.
Options- A. lug
- B. skirt
- C. saddle
- D. guy wire Discuss
- 9. Pick out the wrong statement.
Options- A. Rivetting provides a permanent fastening method.
- B. The joint made by overlapping of one plate over the other, and then rivetting the two plates together with two rows of rivets is called 'double rivetted butt joint'.
- C. Shank diameter of the rivets should be less than the size of the hole drilled in the plate for rivetting.
- D. The efficiency of a rivetted joint is the ratio of the strength of the rivetted joint to the strength of the solid plate. Discuss
- 10. In a shell and tube heat exchanger having triangular pitch, the shell side equivalent diameter is given by
Options- A.
- B.
- C.
- D.
Discuss
Process Equipment and Plant Design problems
Search Results
Correct Answer: a finite stage contactor.
Correct Answer: 5
Correct Answer: increase by 21.6
Correct Answer: To increase the tube side heat transfer co-efficient by inducing turbulence.
Correct Answer: 0.07 - 0.12
Correct Answer: 0.3 to 0.5 d
Correct Answer: Triangular pitch.
Correct Answer: saddle
Correct Answer: The joint made by overlapping of one plate over the other, and then rivetting the two plates together with two rows of rivets is called 'double rivetted butt joint'.
Correct Answer:
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