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- Question
Bond crushing law
Options- A. calls for relatively less energy for the smaller product particles, than does the Rittinger law.
- B. is less realistic in estimating the power requirements of commercial crushers.
- C. states that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product.
- D. states that the work required for the crushing is proportional to the new surface created.
- Correct Answer
- calls for relatively less energy for the smaller product particles, than does the Rittinger law.
- 1. During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.
Options- A. filtration
- B. digestion
- C. sedimentation
- D. both (b) and (c) Discuss
- 2. Sillimanite is a __________ refractory.
Options- A. basic
- B. neutral
- C. high alumina
- D. insulating Discuss
- 3. In catalytic alkylation, higher iso-butane to olefin ratio gives
Options- A. low final boiling point product
- B. higher yield
- C. both (a) and (b)
- D. neither (a) nor (b) Discuss
- 4. Pick out the symbol for "locally mounted instrument" in instrumentation diagram.
Options- A.
- B.
- C.
- D.
Discuss
- 5. Paraffin base crude oil as compared to asphalt base crude gives
Options- A. higher yield of straight run gasoline.
- B. higher octane number gasoline.
- C. lower viscosity index lube oil.
- D. poorer yield of lube oil. Discuss
- 6. Normal mercury thermometer can be used to measure a temperature of about 300°C. However, its maximum temperature measurement range can be increased upto about 500°C by
Options- A. filling nitrogen under pressure in the stem.
- B. increasing the diameter of the tube.
- C. using steel tube in place of glass tube.
- D. accounting for the tube expansion. Discuss
- 7. For measuring the temperature of a red hot furnace, which is the most suitable instrument?
Options- A. Platinum resistance thermometer
- B. Thermocouple
- C. Optical pyrometer
- D. Bimetallic thermometer Discuss
- 8. In second order underdamped system,
Options- A. decay ratio = overshoot
- B. decay ratio = (overshoot)2
- C. overshoot increases for increasing damping co-efficient.
- D. large damping co-efficient means smaller damping. Discuss
- 9. The main use of heavy gas oil produced by the vacuum distillation unit is as a
Options- A. blending component for kerosene.
- B. blending component for petrol.
- C. feedstock for fluid catalytic cracking unit.
- D. none of these. Discuss
- 10. Catalyst used in the production of high density polythene by low pressure Ziegler process is
Options- A. aluminium triethyl activated with TiCl4
- B. platinum
- C. molybdenum
- D. Nickel Discuss
More questions
Correct Answer: both (b) and (c)
Correct Answer: high alumina
Correct Answer: low final boiling point product
Correct Answer:
Correct Answer: higher yield of straight run gasoline.
Correct Answer: filling nitrogen under pressure in the stem.
Correct Answer: Optical pyrometer
Correct Answer: decay ratio = (overshoot)2
Correct Answer: feedstock for fluid catalytic cracking unit.
Correct Answer: aluminium triethyl activated with TiCl4
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