Process Equipment and Plant Design problems
- 1. Hold up of material in a operating rotary drier is in the range of
Options- A. 0.05 to 0.15
- B. 0.25 to 0.50
- C. 0.5 to 0.8
- D. 0.8 to 0.9 Discuss
Correct Answer: 0.05 to 0.15
- 2. In case of design of a shell and tube heat exchanger,
Options- A. minimum cleaning lane of 6.5 mm is provided, when tubes are on a square pitch.
- B. minimum tube sheet thickness (in which tubes are fixed) is equal to the O.D. of the tube upto 15 mm tube diameter; and for > 15 mm tube diameter, tube sheet thickness is smaller than tube diameter.
- C. O.D. of the tube is 6 to 40 mm while the tube lengths used are 0.5, 2.5, 3.0, 4.0, 5.0, 6 metres.
- D. all (a), (b) & (c). Discuss
Correct Answer: all (a), (b) & (c).
- 3. Commercial packed scrubbers are normally designed for a pressure drop range of __________ mm water coloumn per metre of packed height.
Options- A. 4-8
- B. 17-34
- C. 52-68
- D. 88-105 Discuss
Correct Answer: 17-34
- 4. A binary liquid azeotropic mixture has boiling point higher than either of the components, when it shows __________ deviation from Raoult's Law.
Options- A. positive
- B. negative
- C. no
- D. none of these Discuss
Correct Answer: negative
- 5. Vertical condenser is advantageous to the horizontal condenser from operation point of view, when
Options- A. hydrostatic head is required for refluxing the condensate.
- B. only the function of condensation is to be carried out.
- C. sub cooling of condensate is desired.
- D. both the functions of condensation & sub cooling are carried out in a single unit. Discuss
Correct Answer: both the functions of condensation & sub cooling are carried out in a single unit.
- 6. In common bubble cap distillation column design practice, riser area is approximately equal to (where, Aa = Annular passage area, and Sa = Slot area)
Options- A. Aa = Sa
- B. 1.2 Aa = 1.2 Sa
- C. Sa = 1.5 Aa
- D. Aa = 1.5 Sa Discuss
Correct Answer: Aa = Sa
- 7. For storing hazardous chemicals in large storage tanks, the minimum safe distance between the two tanks should range between __________ times the tank diameter.
Options- A. 1 to 1.5
- B. 2.5 to 3.5
- C. 4 to 5
- D. 6 to 8 Discuss
Correct Answer: 1 to 1.5
- 8. Theoretically calculated diameter of the stripping section of the continuous rectification column is __________ that of the enriching section.
Options- A. less than
- B. more than
- C. same as
- D. either more or less (depending upon relative volatility) Discuss
Correct Answer: more than
- 9. A pressure vessel is said to be made of 'thick' shell, if the ratio of its diameter to wall thickness is
Options- A. 10
- B. 10
- C. 20
- D. 20 Discuss
Correct Answer: 10
- 10. Rate of filtrate delivery is inversely proportional to the
Options- A. filtering area & the pressure difference driving force.
- B. viscosity of filtrate.
- C. cake & filter medium resistance.
- D. both (a) and (b) Discuss
Correct Answer: both (a) and (b)
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