Chemical Engineering - Fuels and Combustion

21.
The calorific value of a gas of composition CO2 = 20%, H2 = 50%, CH4 = 30%, is y. If the composition of gas is changed to H2 = 50%, CH4 = 30%, CO2 = 10%, N2 = 10%, then the calorifice value will be
y
0.95 y
1.05 y
1.8 y
Answer: Option
Explanation:
No answer description is available. Let's discuss.

22.
For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3 ), while the C.V. is same on weight basis (i.e., kcal/kg) ?
Propane and acetylene
Propane and LPG
Sewage gas and gobar gas
B.F. gas and coke oven gas
Answer: Option
Explanation:
No answer description is available. Let's discuss.

23.
One kg of carbon for theoretically complete combustion requires __________ kg of air.
11.5
0.5
23
12
Answer: Option
Explanation:
No answer description is available. Let's discuss.

24.
If CO2 is not fully absorbed by the KOH solution meant for its absorption in the orsat apparatus, it will appear as
O2
CO
N2
SO2
Answer: Option
Explanation:
No answer description is available. Let's discuss.

25.
By-products are __________ recovered in 'Beehive ovens'.
fully
partially
not at all
negligibly
Answer: Option
Explanation:
No answer description is available. Let's discuss.