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- Question
The major constituent of laminate of safety glass, which holds the broken glass, pieces in their places during accident (and thus minimises the danger from flying glass fragments) is
Options- A. polyvinyl alcohol
- B. polyvinyl acetale
- C. polyvinyl butyral
- D. PVC
- Correct Answer
- polyvinyl butyral
- 1. Quartz is
Options- A. stable form of silica upto 870°C.
- B. converted to tridymite on firing between 870 to 1470°C.
- C. transformed to crystoballite on heating above 1470°C.
- D. all (a), (b) and (c). Discuss
- 2. In a heat exchanger, floating head is provided to
Options- A. facilitate cleaning of the exchanger.
- B. increase the heat transfer area.
- C. relieve stresses caused by thermal expansion.
- D. increase log mean temperature gradient. Discuss
- 3. A moderator __________ the neutrons.
Options- A. slows down
- B. absorbs
- C. accelerates
- D. reflects Discuss
- 4. 75% of a radioactive element decays in 6 hours. Its half life period is __________ hours.
Options- A. 3/4
- B. 1/6
- C. 3
- D. 4 Discuss
- 5. Electric furnace method for production of phosphorous uses phosphate rock
Options- A. and phosphoric acid
- B. and coke
- C. and sulphuric acid
- D. silica and coke Discuss
- 6. Maximum stability of white phosphorous is at
Options- A. very high pressure
- B. atmospheric pressure
- C. room temperature
- D. >600°C Discuss
- 7. Compressibility factor of a real gas is the ratio of the actual volume to that predicted by ideal gas law. As the pressure of the gas approaches zero, the compressibility factor approaches
Options- A. ?
- B. 0
- C. 1
- D. 0.24 Discuss
- 8. The filtrate flow rate in constant pressure filtration
Options- A. continuously increases.
- B. continuously decreases.
- C. remains constant throughout.
- D. may increase or decrease ; depends on the pressure. Discuss
- 9. Permissible safe limit (TLV) of __________ toxic gas is 100-1000 parts per million (ppm).
Options- A. highly
- B. moderately
- C. extremely
- D. very extremely Discuss
- 10. Green house effect is accentuated by
Options- A. deforestation.
- B. rapid industrialisation.
- C. increased transportation activity.
- D. all (a), (b) and (c). Discuss
More questions
Correct Answer: all (a), (b) and (c).
Correct Answer: relieve stresses caused by thermal expansion.
Correct Answer: slows down
Correct Answer: 3
Correct Answer: silica and coke
Correct Answer: >600°C
Correct Answer: 1
Correct Answer: continuously decreases.
Correct Answer: moderately
Correct Answer: all (a), (b) and (c).
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