Discussion
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- Question
Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about __________ mm.
Options- A. 10
- B. 50
- C. 100
- D. 150
- Correct Answer
- 100
- 1. The ratio of linear stress to linear strain is termed as the
Options- A. modulus of elasticity
- B. modulus of rigidity
- C. bulk modulus
- D. none of these Discuss
- 2. Diameter of rivet hole (d, mm) and the plate thickness (t, mm) are related by Unwin's formula as
Options- A. d = 1.1 t
- B. d = 1.6 t
- C. d = 1.5 t
- D. 3t Discuss
- 3. Which of the following packing materials provides for maximum mass transfer?
Options- A. Lessig rings.
- B. Raschig rings.
- C. Cross-partition rings.
- D. All give the same value. Discuss
- 4. Pick out the wrong statement.
Options- A. In practical operation, distillation towers having diameter 3-6 metres equipped with bubble cap (round) size of 15 cms are used.
- B. Height of packing in a packed tower is about 3 times the column diameter for raschig rings and about 5 to 10 times the column diameter for saddle packing.
- C. In a seive tray, the minimum hole diameter is equal to the tray thickness.
- D. In a stainless steel seive tray, the minimum hole diameter is equal to 10 times the plate thickness. Discuss
- 5. Fouling factor must be included in the calculation of over all design heat transfer coefficient, when the liquid
Options- A. containing suspended solids flows at low velocity.
- B. containing suspended solids flows at high velocity.
- C. is highly viscous.
- D. is of high specific gravity. Discuss
- 6. __________ head is the most economical for cylindrical vessels designed for operating at high pressure (> 15 atm.).
Options- A. Hemispherical
- B. Dished
- C. Ellipsoidal
- D. Conical Discuss
- 7. The distance between the top of the slots and the liquid surface when the static liquid is just ready to flow over the overflow weir is called
Options- A. downcomer liquid seal
- B. static submergence
- C. skirt clearance
- D. none of these Discuss
- 8. The approximate liquid depth in an agitation tank is equal to (where, d = tank diameter)
Options- A. 0.5 d
- B. 0.75 d
- C. d
- D. 2 d Discuss
- 9. For given number of passes, pitch & tube diameter, the maximum number of tubes that can be accommodated in a shell of tripled inside diameter will be __________ times.
Options- A. about 9
- B. considerably more than 9
- C. considerably less than 9
- D. about 3 Discuss
- 10. A binary liquid azeotropic mixture has boiling point lower 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
Process Equipment and Plant Design problems
Search Results
Correct Answer: modulus of elasticity
Correct Answer: d = 1.6 t
Correct Answer: Cross-partition rings.
Correct Answer: In a stainless steel seive tray, the minimum hole diameter is equal to 10 times the plate thickness.
Correct Answer: containing suspended solids flows at low velocity.
Correct Answer: Ellipsoidal
Correct Answer: static submergence
Correct Answer: d
Correct Answer: considerably more than 9
Correct Answer: positive
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