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Fuels And Combustion(Chemical Engineering ) Questions and Answers
Home
Topic
Chemical Engineering
Fuels And Combustion
Question 1.
A coal with high __________ content, would ignite most easily.
Fixed carbon
Volatile matter
Ash
Oxygen
Explanation:-
Answer: Option B. ->
Volatile matter
Question 2.
Preheating of a gaseous fuel results in increased
Flame length
Flame temperature
Quantity of flue gas
Ignition temperature
Explanation:-
Answer: Option B. ->
Flame temperature
Question 3.
The shift conversion reaction taking place during water gas manufacture is given by
C + H₂O ⟷ CO + H₂
C + 2H₂O ⟷ CO₂ + 2H₂
CO + H₂O ⟷ CO₂ + H₂
None of these
Explanation:-
Answer: Option C. ->
CO + H₂O ⟷ CO₂ + H₂
Question 4.
Main constituents of purified Lurgi gas are
H₂, CmHn & CO₂
CO, H₂ & CH₄
CO₂, O₂ & CO
N₂, H₂ & CO₂
Explanation:-
Answer: Option B. ->
CO, H₂ & CH₄
Question 5.
In high temperature carbonisation (as compared to low temperature carbonisation) of coal
Coke oven gas yield is more
Tar yield is less but free carbon in tar is more
Calorific value of coke oven gas is less
All of the above
Explanation:-
Answer: Option D. ->
All of the above
Question 6.
Stoichiometric combustion of 12 kg of carbon requires __________ of oxygen.
1kg mole
22.4 Nm³
32 kg
All of the above
Explanation:-
Answer: Option D. ->
All of the above
Question 7.
One kg of carbon for theoretically complete combustion requires __________ kg of air.
11.5
0.5
23
12
Explanation:-
Answer: Option A. ->
11.5
Question 8.
Insitu theory and drift theory are related to the
Origin of petroleum oil
Origin of coal
Coalification
Variation of coal quality with depth
Explanation:-
Answer: Option B. ->
Origin of coal
Question 9.
Presence of __________ in a dry gaseous fuel does not contribute to its calorific value.
Sulphur
Oxygen
Hydrogen
Carbon
Explanation:-
Answer: Option B. ->
Oxygen
Question 10.
Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is
H₂
CH₄
CO₂
N₂
Explanation:-
Answer: Option B. ->
CH₄
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