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- Question
The value of work index does not change materially from one equipment to another. If the value of work index determined for close circuit grinding is Wi, then the same for open circuit grinding will be
Options- A. 0.5 Wi
- B. Wi
- C. 1.34 Wi
- D. 3.34 Wi
- Correct Answer
- 1.34 Wi
- 1. Soaking pits are meant for heating steel
Options- A. ingots
- B. coils
- C. sheets
- D. slabs Discuss
- 2. Percentage of heavy water in ordinary water is around
Options- A. 0.015
- B. 7.54
- C. 0.71
- D. 32.97 Discuss
- 3. Density of low density polythene is about __________ gm/c.c.
Options- A. 0.38
- B. 0.56
- C. 0.81
- D. 0.91 Discuss
- 4. Rain coats are made of
Options- A. neoprene
- B. PVC
- C. polyurathane
- D. SBR Discuss
- 5. CaCO3 contains __________ percent of Ca by weight.
Options- A. 40
- B. 48
- C. 96
- D. 12 Discuss
- 6. Pick out the material having minimum Rittinger's number.
Options- A. Calcite
- B. Pyrite
- C. Quartz
- D. Galena Discuss
- 7. Average molecular weight of air is about
Options- A. 21
- B. 29
- C. 23
- D. 79 Discuss
- 8. Both tritium and deuterium have the same number of
Options- A. neutrons
- B. electrons
- C. protons
- D. nucleons Discuss
- 9. °API gravity of water at N.T.P. is about
Options- A. 0
- B. 1
- C. 10
- D. 100 Discuss
- 10. Carbon Content by weight in air dried wood may be about __________ percent.
Options- A. 10
- B. 25
- C. 50
- D. 80 Discuss
More questions
Correct Answer: ingots
Correct Answer: 0.015
Correct Answer: 0.91
Correct Answer: PVC
Correct Answer: 40
Correct Answer: Quartz
Correct Answer: 29
Correct Answer: neutrons
Correct Answer: 10
Correct Answer: 50
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