Discussion
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- Question
Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about __________ percent.
Options- A. 5
- B. 20
- C. 35
- D. 55
- Correct Answer
- 20
- 1. With rise in pressure, the solubility of gases in solvent, at a fixed temperature
Options- A. increases
- B. decreases
- C. remains unchanged
- D. decreases linearly Discuss
- 2. Presence of nickel in steel improves its
Options- A. corrosion resistance.
- B. cutting ability.
- C. wear resistance.
- D. all (a), (b) and (c). Discuss
- 3. With increase in the number of carbon and hydrogen atoms in hydrocarbon molecules, the density of petroleum products
Options- A. decreases
- B. increases
- C. remains same
- D. unpredictable from the data Discuss
- 4. If dp is the equivalent diameter of a non-spherical particle, Vp its volume and sp its surface area, then its sphericity is ?s is defined by
Options- A. ?s = 6 Vp/dp sp
- B. ?s = Vp/dp sp
- C. ?s = 6 dp Sp/Vp
- D. ?s = dp Sp/Vp Discuss
- 5. Teflon is
Options- A. phenol formaldehyde
- B. an inorganic polymer
- C. polytetra florouethylene (PTFE)
- D. a monomer Discuss
- 6. The unit of Cp in S.I. units is
Options- A. W/m2.°K
- B. J/kg.°K
- C. W/m.°K
- D. J/m3. °K Discuss
- 7. Ferromagnetic ceramic material is not used in the
Options- A. thermal insulation
- B. transformers
- C. magnetic switches
- D. television sets Discuss
- 8. In a __________ rivetted joint, the rivets in the various rows are opposite to each other.
Options- A. zig-zag
- B. chain
- C. diamond
- D. none of these Discuss
- 9. Dilute wine was used as a thermometric liquid initially to develop temperature scale. First emperical temperature scale developed was the __________ scale.
Options- A. Kelvin
- B. Centigrade
- C. Fahrenheit
- D. Reaumer Discuss
- 10. Hazards associated with the relief valve leakage for extremely hazardous material storage can be taken care of by providing
Options- A. rupture diaphragm
- B. dikes
- C. surge chamber
- D. none of these Discuss
More questions
Correct Answer: increases
Correct Answer: corrosion resistance.
Correct Answer: increases
Correct Answer: ?s = 6 Vp/dp sp
Correct Answer: polytetra florouethylene (PTFE)
Correct Answer: J/kg.°K
Correct Answer: thermal insulation
Correct Answer: chain
Correct Answer: Fahrenheit
Correct Answer: rupture diaphragm
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