Produce weak coke
Produce strong coke
May damage the coke oven walls during carbonisation
Both B and C
✅ The correct answer is option D.
Fuel and Combustion MCQs
High excess air in combustion of fuels results in
Increased fuel consumption
Incomplete combustion
Smoky flame
None of these
✅ The correct answer is option A.
Producer gas comprises mainly of
CO & N₂
CO & H₂
CO₂ & N₂
CO₂ & H₂
✅ The correct answer is option A.
Largest constituent of coke oven gas is
N₂
H₂
CH₄
CO₂
✅ The correct answer is option B.
In Orsat’s apparatus, ammoniacal cuprous chloride is used for selectivity absorbing
CO
CO₂
O₂
H₂O
✅ The correct answer is option A.
Blast furnace gas burns with a bluish flame, because of the presence of
CO
CH₄
CO₂
S
✅ The correct answer is option A.
A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon
Is less liable to spontaneous combustion on storage
Is more difficult to ignite and produces a shorter flame
Requires smaller combustion space and less secondary air
None of these
✅ The correct answer is option D.
Gobar gas is produced by the __________ of ‘gobar’ (cow dung).
Hydrolysis
Fermentation
Oxidation
Dehydration
✅ The correct answer is option B.
Removal of hydrogen from coke oven gas
Increases its calorific value
Decreases its calorific value
Does not alter its calorific value
Is not possible on commerical scale
✅ The correct answer is option A.