Discussion
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- Question
Which of the following is not a by-product recovered in a high temperature coal carbonisation plant?
Options- A. Benzol
- B. Pitch-cresosote mixture (PCM)
- C. Napthalene
- D. Ethylene
- Correct Answer
- Ethylene
- 1. A coal containing very high percentage of durain is called __________ coal.
Options- A. bright
- B. splint
- C. non-banded
- D. boghead Discuss
- 2. Presence of __________ in a dry gaseous fuel does not contribute to its calorific value.
Options- A. sulphur
- B. oxygen
- C. hydrogen
- D. carbon Discuss
- 3. Which of the following is not a product of tar distillation?
Options- A. Phenol & naphthalene
- B. Benzol & pitch
- C. Anthracene & creosote
- D. None of these Discuss
- 4. Which of the following is the most reactive (as regards the formation of CO + H2 from C + H2O)?
Options- A. Blast furnace coke
- B. Low temperature coke
- C. Anthracite coal
- D. Sub-bituminous coal Discuss
- 5. Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because
Options- A. the hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot.
- B. it reduces its calorific value tremendously.
- C. it reduces its flame temperature tremendously.
- D. there are chances of explosion during preheating. Discuss
- 6. Combustion reaction of fuels is a/an __________ reaction.
Options- A. auto catalytic
- B. exothermic
- C. endothermic
- D. none of these Discuss
- 7. Higher efficiency in the combustion of solid fuel can not be achieved by
Options- A. proper fuel preparation.
- B. keeping the flue gas exhaust temperature very high.
- C. adopting efficient-fuel firing technique & equipment.
- D. supplying correct quantity of combustion air. Discuss
- 8. High temperature in gasification of coal favours
Options- A. high production of CO2.
- B. low production of CO2.
- C. high production of CO.
- D. both (b) and (c). Discuss
- 9. Which of the following is used for making the explosive 'TNT'?
Options- A. Benzol
- B. Toluene
- C. Pyridine
- D. Cerosote Discuss
- 10. Gray King Assay and Swelling Index of a coal is a measure of its
Options- A. swelling characteristics.
- B. abradability.
- C. agglutinating properties.
- D. resistance to impact breakage. Discuss
Fuels and Combustion problems
Search Results
Correct Answer: splint
Correct Answer: oxygen
Correct Answer: None of these
Correct Answer: Low temperature coke
Correct Answer: the hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot.
Correct Answer: exothermic
Correct Answer: keeping the flue gas exhaust temperature very high.
Correct Answer: both (b) and (c).
Correct Answer: Toluene
Correct Answer: swelling characteristics.
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