Discussion
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- Question
Which of the following is used to set the diameter of the distillation column?
Options- A. Number of theorectical plates.
- B. Static submergence.
- C. Allowable vapour velocity.
- D. Length of straight rectangular weir on cross-flow tray.
- Correct Answer
- Allowable vapour velocity.
- 1. Saddle supports are used for supporting __________ vessels.
Options- A. horizontal cylinderical
- B. tall vertical
- C. thick walled vertical
- D. thick spherical Discuss
- 2. Needle valves are generally not used for
Options- A. very large diameter pipes.
- B. high pressure throttling service.
- C. very accurate flow control.
- D. smaller sizes of pipe. Discuss
- 3. Speed of industrial paddle agitator ranges from __________ rpm.
Options- A. 1 to 5
- B. 20 to 100
- C. 500 to 750
- D. 1000 to 2000 Discuss
- 4. Pick out the wrong statement:
Options- A. The tensile strength of a brittle material is less than its compressive strength.
- B. The compressive strength of a ductile materia] is less than its tensile strength.
- C. In a thick cylindrical shell, the hoop stress is maximum at the inner radius.
- D. The value of crushing load is more than that of buckling load for long colmns. Discuss
- 5. Height equivalent to a theoretical plate (HETP) is the height of packing that will give the same separation as one theoretical plate in gas-liquid mass transfer operations like distillation, absorption/stripping and humidification/dehumidification. HETP which is experimentally determined, depends upon the
Options- A. flow rates of each fluid.
- B. type and size of packing.
- C. concentration of each fluid.
- D. all a, b & c. Discuss
- 6. The most common standard size of bubble caps used in industrial operation is
Options- A. 1" dia cap with 0.5" dia riser.
- B. 6" dia cap with 4" dia riser.
- C. 8" dia cap with 1" dia riser.
- D. 4" dia cap with 8" dia riser. Discuss
- 7. With increase in pressure drop (for a given particle size), the dust collection efficiency of a cyclone separator will
Options- A. increase
- B. decrease
- C. remain unaffected
- D. increase or decrease depending on the nature of the dust. Discuss
- 8. The thickness of heat transfer plates used in the plate type heat exchanger ranges from __________ mm, pressed in a single piece provided with grooves & corrugations.
Options- A. 0.3 to 0.8
- B. 1.25 to 3.125
- C. 3.5 to 7.0
- D. 8-12 Discuss
- 9. Cooling water fouling factors vary in the range of 0.001 to 0.003
Options- A. (BTU/hr.ft2 . °F)-1
- B. (kcal/hr.m2 .°C)-1
- C. (W/m2.°K)-1
- D. (kcal/hr. m. °C)-1 Discuss
- 10. Optimum reflux ratio in a continuous distillation column is determined by the
Options- A. maximum permissible vapour velocity.
- B. flooding limit of the column.
- C. total cost consideration (fixed cost of the column plus the cooling water & steam cost).
- D. none of these. Discuss
Process Equipment and Plant Design problems
Search Results
Correct Answer: horizontal cylinderical
Correct Answer: very large diameter pipes.
Correct Answer: 20 to 100
Correct Answer: The value of crushing load is more than that of buckling load for long colmns.
Correct Answer: all a, b & c.
Correct Answer: 6" dia cap with 4" dia riser.
Correct Answer: increase
Correct Answer: 1.25 to 3.125
Correct Answer: (BTU/hr.ft2 . °F)-1
Correct Answer: total cost consideration (fixed cost of the column plus the cooling water & steam cost).
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