It contains large amount of volatile matter
It is stored in tall heaps
Smaller fines are stored in large quantity
All of the above
✅ The correct answer is option D.
Chemical Engineering MCQs
Combustion of pulverised coal as compared to that of lump coal
Develops a non-luminous flame
Develops a low temperature flame
Can be done with less excess air
Provides a lower rate of heat release
✅ The correct answer is option C.
Efficient burning of anthracite coal requires
Low preheat of air
Fine grinding
High excess air
All of the above
✅ The correct answer is option B.
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.
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.
Ignition temperature decreases progressively from anthracite to lignite, because
Volatile matter content increases
Carbon content decreases
Moisture content increases
Ash content increases
✅ The correct answer is option A.
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.
Initial pressure of oxygen introduced into the ‘bomb’ of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm.
3-May
25-30
60-65
95-100
✅ The correct answer is option B.
Mott and Wheeler test is conducted on coke to find its
Reactivity with O₂
Abradability
Phosphorus content
Volatile matter content
✅ The correct answer is option A.
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.