1000+ Fuels and Combustion MCQ Questions and Answers - 1

Question: 1

Which of the following gaseous fuels has the lower calorific value?

(A) blast furnace gas

(B) converter gas

(C) refinery gas

(D) gobar gas

Question: 2

Combustion of large size and irregular lump coal does not result in higher

(A) unburnts in the ash

(B) thermal efficiency

(C) stack loss

(D) higher excess air requirement

Question: 3

Blast furnace coke is made from coal by

(A) heating the coal in an oven in presence of air

(B) medium temperature carbonisation

(C) high temperature carbonisation

(D) low temperature carbonisation

Question: 4

Which of the following has the highest calorific value?

(A) anthracite

(B) peat

(C) lignite

(D) sub-bituminous coal

Question: 5

Coal is pulverised before burning in large capacity boiler furnaces mainly to

(A) provide trouble free operations

(B) enhance its calorific value

(C) facilitate easy ash removal

(D) ensure its complete combustion