Fuels And Combustion MCQ Questions & Answers | Chemical Engineering

A. Less volatile matter

B. More carbon

C. Greater percentage of ash

D. All of the above

A. Preheating of fuel gases & combustion air

B. Reducing sulphur content in the fuel

C. Adopting proper fuel firing technique & fuel preparation

D. Supplying correct amount of combustion air

A. Oxygen content decreases from lignite to bituminous coal as the coalification increases

B. The less the oxygen content, better is the coal, as it reduces the calorific value

C. With increase in oxygen content, moisture holding capacity of coal increases and the caking power decreases

D. All of the above

A. Proper fuel preparation

B. Keeping the flue gas exhaust temperature very high

C. Adopting efficient-fuel firing technique & equipment

D. Supplying correct quantity of combustion air

A. Higher methane content and thus higher calorific value

B. Higher carbon monoxide content

C. Lower carbon dioxide content

D. None of these

A. Blast furnace gas

B. Coke oven gas

C. Carburetted water gas

D. Oil refinery gas

A. Porosity

B. Coke reactivity index (CRI)

C. Critical air blast (CAB) value

D. Both B and C

A. Flue gases

B. Ash content in the fuel

C. Incomplete combustion

D. Unburnt carbon in flue gases

A. Less moisture content

B. High fusion point of its ash

C. High bulk density

D. Lower ash content

A. M = 1.8 A

B. M = 0.5 A

C. M = 1.1 A

D. M = A