Discussion
Home ‣ Chemical Engineering ‣ Fuels and Combustion See What Others Are Saying!
- Question
A coal with high ash content is undesirable, as
Options- A. it is abrasive to the coal pulveriser (ie.g. ball mill) and the combustion chamber.
- B. the ash in molten condition gets absorbed in the pores of the refractory lining of the furnace and causes its spalling due to different co-efficient of expansion/contraction of the refractory and the ash.
- C. the ash retains the sulphur & phosphorus and thus affects the quality of products in metallurgical furnace apart from increasing the slag volume. Besides, it may fuse and stick to the boiler tubes thereby reducing the heat transfer.
- D. all (a), (b) and (c).
- Correct Answer
- all (a), (b) and (c).
- 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
Comments
There are no comments.More in Chemical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.