Plutonium
Uranium
Radium
Neptunium
✅ The correct answer is option A.
Fuel and Combustion MCQs
Bituminous coal
Ignites less easily than anthracite
Is generally coking
Burns with smoky yellow flame
Both B and C
✅ The correct answer is option D.
When the coal is heated in absence of air, it is called its
Deoxidation
Gasification
Coalification
Carbonisation
✅ The correct answer is option D.
The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always
1
< 1
> 1
Unpredictable
✅ The correct answer is option C.
The temperature at which plastic layer formation takes place during carbonisation of coal varies from __________ °C.
100 to 150
350 to 450
550 to 650
700 to 850
✅ The correct answer is option B.
Calorific value of tar is about __________ Kcal/kg.
8800
12000
5000
16000
✅ The correct answer is option A.
The ratio of maximum adiabatic flame temperature in air to that in pure oxygen is always
1
<1
> 1
Unpredicatable
✅ The correct answer is option B.
Coke ovens in steel plant are heated by
Electricity
Coke oven gas
Mixed gas
Both B & C
✅ The correct answer is option D.
Caking index of coal blend used for blast furnace coke making is about
8
12
22
36
✅ The correct answer is option C.
Natural draft created by the chimney depends upon
Temperature of the flue gas
Its height
Both A & B
Neither A nor B
✅ The correct answer is option C.