Discussion
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- Question
In a size reduction crushing operation, feed size is 100 to 300 mm. while the product size is 10 to 50 mm. This is a case of the __________ crushing.
Options- A. primary
- B. secondary
- C. fine
- D. ultrafine
- Correct Answer
- secondary
- 1. An amplitude ratio of 0.1 corresponds to __________ decibels.
Options- A. 20
- B. -20
- C. 10
- D. -10 Discuss
- 2. Acrylonitrile is mainly used in the __________ industry.
Options- A. polymer
- B. printing
- C. dyeing
- D. photographic Discuss
- 3. Reingleman chart is used for the evaluation of __________ pollution.
Options- A. air
- B. water
- C. noise
- D. radioactive Discuss
- 4. In a working refrigerator, the value of COP is always
Options- A. 0
- B. < 0
- C. < 1
- D. > 1 Discuss
- 5. Isotopes of an element have different
Options- A. mass number
- B. electronic configuration
- C. nuclear charge
- D. chemical properties Discuss
- 6. 1 BTU/lb.?°F is equivalent to __________ kcal/kg.°C.
Options- A. 1
- B. 2.42
- C. 1.987
- D. 4.97 Discuss
- 7. Carbon black is pulverised in a
Options- A. hammer crusher
- B. ball mill
- C. roll crusher
- D. gyratory crusher Discuss
- 8. Butadiene is a/an
Options- A. di-olefin
- B. naphthene
- C. aromatic
- D. olefin Discuss
- 9. __________ nozzles are used in continuous casting of steel,
Options- A. Zircon
- B. Thoria
- C. Carborundum
- D. Beryllia Discuss
- 10. Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels.
Options- A. 85
- B. 105
- C. 125
- D. 145 Discuss
More questions
Correct Answer: -20
Correct Answer: polymer
Correct Answer: air
Correct Answer: > 1
Correct Answer: mass number
Correct Answer: 1
Correct Answer: ball mill
Correct Answer: di-olefin
Correct Answer: Zircon
Correct Answer: 105
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