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- Question
In case of a hammer crusher, the final product size depends on the
Options- A. feed rate.
- B. rotor speed.
- C. clearance between hammer & grinding plates.
- D. all (a), (b) and (c).
- Correct Answer
- all (a), (b) and (c).
- 1. Fusion of bauxite and __________ produces high alumina cement.
Options- A. alum
- B. limestone
- C. coke
- D. quartz Discuss
- 2. Removal of activated carbon from glycerine is done by
Options- A. plate and frame filter
- B. rotary vacuum filter
- C. batch basket centrifuge
- D. none of these Discuss
- 3. In case of a ball mill,
Options- A. coarse feed requires a larger ball.
- B. fine feed requires a larger ball.
- C. operating speed should be more than the critical speed.
- D. none of these Discuss
- 4. Operating temperature and pressure in catalytic reforming is about
Options- A. 1-5 Kgf/cm2 & 200°C.
- B. 15-45 Kgf/cm2 & 450-550°C.
- C. 50 - 75 kgf/cm2 & 600 - 800°C.
- D. 5-10 kgf/cm2 & 150 - 250°C. Discuss
- 5. In a furnace employing forced draught as compared to induced draught,
Options- A. air is sucked in, so air leaks are more and hence the furnace efficiency is reduced.
- B. the fan operates hot and hence blades are liable to corrosion and erosion.
- C. positive pressure exists in the furnace.
- D. none of these Discuss
- 6. The function of manholes provided in the shell of a distillation column is to
Options- A. keep a check on the liquid gradient over the plate by direct visual observation.
- B. give access to the individual trays for cleaning, maintenance and installation.
- C. guard against foaming & entrainment by dumping antifoaming agent through it.
- D. all (a), (b) and (c). Discuss
- 7. Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of
Options- A. phosphoric acid.
- B. superphosphate.
- C. phosphorous.
- D. triple superphosphate. Discuss
- 8. Pick out the wrong statement.
Options- A. Benzopyrene which causes cancer is present in traces in tobacco, charcoal & petrol driven automobile exhaust.
- B. NO2 is capable of penetrating the troposphere and can absorb both ultraviolet & visible light.
- C. Hydrocarbon pollutants are produced by sweet gum, oak & natural rubber trees.
- D. H2S is not at all produced during combustion of sulphur bearing fuels as all the sulphur is oxidised to SO2. Discuss
- 9. 40 gms each of the methane and oxygen are mixed in an empty container maintained at 40°C. The fraction of the total pressure exerted by oxygen is
Options- A. 1/2
- B. 1/3
- C. 1/4
- D. 2/3 Discuss
- 10. The number of kg vaporised per kg of steam fed to the evaporator is defined as
Options- A. capacity
- B. rate of evaporation
- C. economy
- D. rate of vaporisation Discuss
More questions
Correct Answer: limestone
Correct Answer: plate and frame filter
Correct Answer: coarse feed requires a larger ball.
Correct Answer: 15-45 Kgf/cm2 & 450-550°C.
Correct Answer: positive pressure exists in the furnace.
Correct Answer: give access to the individual trays for cleaning, maintenance and installation.
Correct Answer: phosphorous.
Correct Answer: H2S is not at all produced during combustion of sulphur bearing fuels as all the sulphur is oxidised to SO2.
Correct Answer: 1/3
Correct Answer: economy
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