Discussion
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- Question
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
- Correct Answer
- 20.8
- 1. 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
- 2. 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
- 3. Safety valves are provided in chemical equipments to guard against excessive
Options- A. temperature
- B. pressure/pressure fluctuation
- C. turbulence
- D. noise Discuss
- 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
- 5. 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
- 6. 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
- 7. 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
- 8. Mc Cable Thiele method used for finding theoretical stages in a distillation column assumes that the
Options- A. sensible heat differences are small, because the temperature changes from tray to tray is small.
- B. Trouton's rule is applicable.
- C. liquid/vapor loading across the column remains constant.
- D. all (a), (b) and (c). Discuss
- 9. What is the value of 'q' for saturated vapor feed to a distillation column?(where q = fraction of the feed stream that is liquid.)
Options- A. 0
- B. 1
- C. <0
- D. > 1 Discuss
- 10.
for 90° elbow (medium radius) and 90°square elbow would be respectively around
Options- A. 25 and 60
- B. 3 and 5
- C. 100 and 250
- D. 250 and 600 Discuss
Process Equipment and Plant Design problems
Search Results
Correct Answer: thrice
Correct Answer: Centre to centre distance between two consecutives rivets in a row is called the pitch.
Correct Answer: pressure/pressure fluctuation
Correct Answer: both (a) and (b).
Correct Answer: not related with
Correct Answer: twice
Correct Answer: creating turbulence.
Correct Answer: all (a), (b) and (c).
Correct Answer: 0
Correct Answer: 25 and 60
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