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- Question
Presence of a non-condensing gas in a condensing vapour
Options- A. increases the rate of condensation.
- B. decreases thermal resistance.
- C. is desirable to increase the film co-efficient.
- D. none of these.
- Correct Answer
- none of these.
- 1. Hot metal runner in blast furnace are lined with __________ bricks.
Options- A. silica
- B. carborundum
- C. fireclay
- D. magnesite Discuss
- 2. Pressure drop (?p) and the superficial gas mass velocity (G) in case of packed absorption tower operating in the preloading range are related as
Options- A. ?p = G
- B. ?p = G0.5
- C. ?p = G2
- D.
Discuss
- 3. Polyesters are manufactured by the polycondensation reaction of
Options- A. dibasic acid with dihydric alcohol.
- B. a single monomer.
- C. carboxylic acid with ethylene.
- D. inorganic acid with ethylene glycol. Discuss
- 4. Optimum number of effects in a multiple effect evaporator is decided by the
Options- A. cost benefit analysis.
- B. floor area availability.
- C. terminal parameters.
- D. evaporation capacity required. Discuss
- 5. Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is
Options- A. 7 kgf/cm2 and 70 °C.
- B. 1000 kgf/cm2 and 100°C.
- C. 7 kgf/cm2 and 700°C.
- D. 1 kgf/cm2 (gage) and 70°C. Discuss
- 6. __________ is a copolymer.
Options- A. styrene butadiene rubber (SBR)
- B. Neoprene
- C. PVC
- D. None of these Discuss
- 7. Crude oil is subjected to vacuum distillation in the last stage, because
Options- A. high boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose.
- B. lighter/low boiling products are prone to thermal decomposition.
- C. high purity products can be obtained thereby.
- D. none of these. Discuss
- 8. Polyvinyl chloride (PVC)
Options- A. is produced by polycondensation reaction.
- B. uses either emulsion or suspension polymerisation methods.
- C. can be made thermosetting by adding a plasticiser.
- D. softening temperature is 200°C. Discuss
- 9. Polyurathane can not be used to make
Options- A. automobile cushion
- B. thermal insulation in refrigerator
- C. coating and adhesive
- D. fibre reinforced plastic (FRP) Discuss
- 10. Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6.
Options- A. -20 to 25
- B. 50 to 75
- C. 100 to 150
- D. 250-280 Discuss
More questions
Correct Answer: fireclay
Correct Answer: ?p = G2
Correct Answer: dibasic acid with dihydric alcohol.
Correct Answer: cost benefit analysis.
Correct Answer: 7 kgf/cm2 and 70 °C.
Correct Answer: styrene butadiene rubber (SBR)
Correct Answer: high boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose.
Correct Answer: uses either emulsion or suspension polymerisation methods.
Correct Answer: fibre reinforced plastic (FRP)
Correct Answer: 250-280
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