Low preheat of air
Fine grinding
High excess air
All of the above
✅ The correct answer is option B.
Fuel and Combustion MCQs
Anthracite coal
Contains more volatile matter than bituminous coal
Ignites more easily than bituminous coal
Is essentially a coking coal
Burns with short, bluish, yellow-tipped flame producing very little smoke
✅ The correct answer is option D.
Which of the following is a primary fuel?
Blast furnace coke
Gasoline
Natural gas
Wood charcoal
✅ The correct answer is option C.
With increase in moisture content of coal, its
Calorific value increases sometimes
Bulk density always decreases
Clinkering tendency during combustion increases
None of these
✅ The correct answer is option D.
Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is
H₂
CH₄
CO₂
N₂
✅ The correct answer is option B.
Adiabatic flame temperature of a fuel is dependent on the initial temperature of
Fuel
Air
Both A & B
Neither A nor B
✅ The correct answer is option C.
A good coking coal should have high __________ content.
Ash
Sulphur & phosphorus
Moisture
None of these
✅ The correct answer is option D.
Calorific values of both the solid as well as the liquid fuels can be determined by __________ calorimeter.
Bomb
Boy’s
Junkar’s
None of these
✅ The correct answer is option A.
Percentage of methane in coke oven gas may be around
5
15
25
50
✅ The correct answer is option C.
Main constituent of natural gas is
CH₄ (upto 90%)
C₂H₆
C₃H₈
H₂
✅ The correct answer is option A.