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- Question
'If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity', which is affected by the
Options- A. pressure
- B. temperature
- C. both (a) & (b)
- D. neither (a) nor (b)
- Correct Answer
- temperature
- 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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