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- Question
The function of an economiser in a boiler is to preheat the
Options- A. feedwater
- B. combustion air
- C. pulverised coal
- D. furnace oil
- Correct Answer
- feedwater
- 1. Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter)
Options- A. 0.5 D
- B. D
- C. 1.5 D
- D. 2 D Discuss
- 2. Naphthenic acid is represented by
Options- A. CnH2n+2O2
- B. CnH2n-2O2
- C. CnH2n+2O2 (n ? 6)
- D. CnH2n+6O2 (n ? 6) Discuss
- 3. Naphtha yield in straight run distillation of crude oil may be about __________ percent.
Options- A. 2
- B. 6
- C. 12
- D. 18 Discuss
- 4. Perspex can be used as a substitute of glass. Its monomer is
Options- A. methyl methacrylate
- B. DMT
- C. butadiene
- D. tetrafluroethylene Discuss
- 5. Value of Peclet number = 0, is the representative of
Options- A. laminar flow.
- B. complete back mixing.
- C. plug flow.
- D. eddy diffusivity = 0. Discuss
- 6. Hydrocracking employs
Options- A. high pressure & temperature.
- B. low pressure & temperature.
- C. high pressure and low temperature.
- D. high temperature and low pressure. Discuss
- 7. Visco-elastic behaviour exhibited by plastics is a __________ like behaviour.
Options- A. solid
- B. liquid
- C. combination of solid & liquid
- D. neither solid nor liquid Discuss
- 8. Acrilan fibres used for making cloth, carpet & blankets, which is a hard, horny & high melting polymeric material is nothing but
Options- A. polyacrylonitrile
- B. polyamide
- C. saturated polyester
- D. alkyd resin Discuss
- 9. The organic acid monomer in nylon 66 is
Options- A. sebasic acid
- B. terephthalic acid
- C. adipic acid
- D. benzoic acid Discuss
- 10. In the context of the chemical process industries, the term BOD is normally associated with the
Options- A. characterisation of solid wastes.
- B. organic concentration in gaseous effluents.
- C. characterisation of liquid effluents.
- D. characterisation of boiler feed water. Discuss
More questions
Correct Answer: D
Correct Answer: CnH2n-2O2
Correct Answer: 6
Correct Answer: methyl methacrylate
Correct Answer: complete back mixing.
Correct Answer: high pressure & temperature.
Correct Answer: combination of solid & liquid
Correct Answer: polyacrylonitrile
Correct Answer: adipic acid
Correct Answer: characterisation of liquid effluents.
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