Process Equipment and Plant Design problems
- 1. Welded joint efficiency in the design of chemical process equipment is taken as
Options- A. 0.55
- B. 0.75
- C. 0.85
- D. 0.95 Discuss
Correct Answer: 0.85
- 2. Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling.
Options- A. CO2
- B. SO2
- C. NH3
- D. none of these Discuss
Correct Answer: NH3
- 3. The equivalent diameter for pressure drop is __________ that for heat transfer.
Options- A. smaller than
- B. greater than
- C. equal to
- D. not related with Discuss
Correct Answer: not related with
- 4. Most of the storage vessels/tanks are made cylindrical, because of the fact that a cylinder
Options- A. has greater structural strength.
- B. is easy to fabricate.
- C. both (a) and (b).
- D. neither (a) nor (b). Discuss
Correct Answer: both (a) and (b).
- 5. Safety valves are provided in chemical equipments to guard against excessive
Options- A. temperature
- B. pressure/pressure fluctuation
- C. turbulence
- D. noise Discuss
Correct Answer: pressure/pressure fluctuation
- 6. Pick out the correct statement
Options- A. Centre to centre distance between two consecutives rivets in a row is called the pitch.
- B. A rivetted joint made in overlapping plates is called butt joint.
- C. Hole size drilled in rivetted plates is less than the actual size of the rivet.
- D. none of these. Discuss
Correct Answer: Centre to centre distance between two consecutives rivets in a row is called the pitch.
- 7. For identical situation, condensing film coefficient in case of a horizontal condenser is almost __________ the value expected in case of vertical condenser.
Options- A. half
- B. twice
- C. thrice
- D. five times Discuss
Correct Answer: thrice
- 8. A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of
Options- A. 2
- B. 20.8
- C. 20.2
- D. none of these Discuss
Correct Answer: 20.8
- 9. The thickness of segmental baffles (25 -35% cut truncated plates usually) is generally __________ the tube wall thickness.
Options- A. equal to
- B. twice
- C. four times
- D. half Discuss
Correct Answer: twice
- 10. In a multipass shell and tube heat exchanger, the baffles on shell side is primarily provided for
Options- A. reducing scale deposition.
- B. increasing pressure drop.
- C. fixing the tubes.
- D. creating turbulence. Discuss
Correct Answer: creating turbulence.
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