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- Question
Pick out the wrong statement pertaining to the design of the bubble cap tray of a distillation column to give stable operation and even vapour distribution.
Options- A. The pressure drop due to the caps & slots and the static submergence should be as high as practicable for reasonable operation.
- B. Tendency towards stable operation is increased by increasing the skirt clearance of the caps, lowering the rate of liquid flow per unit plate width or increasing the spacing between the caps.
- C. The dimensionless ratio of liquid gradient to pressure drop head caused by the bubble cap assembly should be less than 0.4.
- D. none of these.
- Correct Answer
- none of these.
- 1. NPK fertiliser is a __________ fertiliser.
Options- A. complex
- B. mixed
- C. nitrogenous
- D. phosphatic Discuss
- 2. Pick out the correct statement.
Options- A. In case of liquid-liquid extraction, no separation is possible, if the selectivity of the solvent used is unity.
- B. With increase in temperature, the selectivity of the solvent used in solvent extraction decreases.
- C. The selectivity of solvent used in solvent extraction is unity at the plait point.
- D. all (a), (b) and (c). Discuss
- 3. Reducing atmosphere is maintained in a
Options- A. calcination kiln
- B. blast furnace
- C. soaking pit
- D. L.D. converter Discuss
- 4. Crude oil is pumped by a __________ pump.
Options- A. gear
- B. centrifugal
- C. screw
- D. reciprocating Discuss
- 5. From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about __________ ppm.
Options- A. 1
- B. 5
- C. 50
- D. 500 Discuss
- 6. Except for monoatomic gases, the molal heat capacity at constant volume for all gases is __________ Kcal/Kg mole.° K.
Options- A. 3
- B. > 3
- C. < 3
- D. < 1 Discuss
- 7. The reaction A + B ? C has been conducted in a reactor as shown below.
The number of balances (material) that can be made around the reactor are
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 8. In classification, particles are said to be equal settling, if they have the same terminal velocities in the
Options- A. different fluids
- B. same fluid
- C. same field of force
- D. both (b) and (c) Discuss
- 9. __________ are used for the separation of coarse particles from a slurry of fine particles.
Options- A. Thickeners
- B. Classifiers
- C. Hydrocyclones
- D. Decanters Discuss
- 10. Polymerisation of poly functional monomers produces polymers having
Options- A. good machanical strength
- B. low viscosity
- C. low melting point
- D. none of these Discuss
More questions
Correct Answer: mixed
Correct Answer: all (a), (b) and (c).
Correct Answer: blast furnace
Correct Answer: centrifugal
Correct Answer: 5
Correct Answer: > 3
Correct Answer: 3
Correct Answer: both (b) and (c)
Correct Answer: Classifiers
Correct Answer: good machanical strength
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