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- Question
In producer gas making furnace, steam is added along with air to mainly control the
Options- A. fusion of coal ash & clinker formation.
- B. C. V. of producer gas.
- C. temperature of producer gas.
- D. tar content in producer gas.
- Correct Answer
- fusion of coal ash & clinker formation.
- 1. Solvent used in duo-sol extraction for lube oil upgradation is a mixture of
Options- A. propane & phenol-cresol mixture.
- B. methyl ethyl ketone & glycol.
- C. phenol & furfural.
- D. propane & liquid sulphur dioxide. Discuss
- 2. __________ substances present in sewage are removed in grit chamber during sewage treatment.
Options- A. Organic
- B. Fatty
- C. Inorganic
- D. Dissolved Discuss
- 3. Presence of nitrogen and phosphorous in waste water discharged into lakes and ponds causes
Options- A. foaming
- B. odour nuisances
- C. undesirable plant growth
- D. turbidity Discuss
- 4. __________ is normally used for the manufacture of refrigerator components and transistor parts.
Options- A. Polyproylene
- B. Polystyrene
- C. Polyester
- D. Polyurathene Discuss
- 5. Fireclay bricks are used in the
Options- A. coke ovens regenerator.
- B. outer lining of L.D. converter.
- C. hearth bottom of blast furnace.
- D. coke oven walls. Discuss
- 6. Pick out the wrong statement.
Options- A. The disintegration rate of a radioactive substance can not be increased by heating it.
- B. Electrons have negligible mass and unit negative change.
- C. Deuterium atom has one proton and two neutrons in its nucleus.
- D. Cadmium is capable of absorbing neutrons. Discuss
- 7. A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the
Options- A. atomic weight of the metal is 4.
- B. equivalent weight of the metal is 4.
- C. atomic weight of the metal is 2.
- D. equivalent weight of the metal is 8. Discuss
- 8. Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an
Options- A. blast furnace.
- B. steam boiler.
- C. salt bath furnace.
- D. annealing furnace. Discuss
- 9. Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m3 . The diffusivity of aniline in air is 0.74xl0-5m2/s.The numerical value of mass transfer co-efficient is 7.4 x 10-3. Its units are
Options- A. m/s
- B. cm/s
- C. mole/m2.s.Pa
- D. kmole/m2.s.Pa Discuss
- 10. A copolymer is formed by the combination of two or more monomer molecules
Options- A. in a chain without the elimination of water.
- B. with the elimination of small amount of water.
- C. of the same monomer by elimination of small molecules of water.
- D. none of these. Discuss
More questions
Correct Answer: propane & phenol-cresol mixture.
Correct Answer: Inorganic
Correct Answer: undesirable plant growth
Correct Answer: Polystyrene
Correct Answer: coke ovens regenerator.
Correct Answer: Deuterium atom has one proton and two neutrons in its nucleus.
Correct Answer: equivalent weight of the metal is 4.
Correct Answer: salt bath furnace.
Correct Answer: mole/m2.s.Pa
Correct Answer: in a chain without the elimination of water.
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