Chemical Engineering - Fuels and Combustion

41.
Coking time in a commercial high temperature coal carbonisation plant is about __________ hours.
6
18
28
36
Answer: Option
Explanation:
No answer description is available. Let's discuss.

42.
Which of the following has the least calorific value (kcal/Nm3) ?
Blast furnace gas
Coke oven gas
Sewage gas
Natural gas
Answer: Option
Explanation:
No answer description is available. Let's discuss.

43.
Commercial production of petrol from coal (as practised in a factory at Sasol in South Africa) is done by the __________ of coal.
hydrogenation
gasification
carbonisation
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

44.
The combustion reaction, C + O2 = CO2, is
exothermic
endothermic
autocatalytic
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

45.
For maximum discharge through a chimney, its height should be
200 meters.
infinitely long.
more than 105.7 metres.
equal to the height of the hot gas column producing draught.
Answer: Option
Explanation:
No answer description is available. Let's discuss.