7000+ Metallurgical Engineering Objective Questions on Fuel Technology - 1

Question: 1

Preheating combustion air is done to

(A) Reduce its requirement for complete combustion of fuel

(B) Complete the combustion of fuel

(C) Increase the calorific value of the fuel

(D) Increase the adiabatic flame temperature

Question: 2

The cooling medium used in dry quenching of coke is

(A) Phenolic water

(B) Carbon dioxide

(C) Air

(D) Nitrogen

Question: 3

Coalification means

(A) Direct hydrogenation of coal

(B) Complete combustion of coal

(C) The process of conversion of lignite into anthracite

(D) Underground gasification of coal

Question: 4

Largest constituent of blast furnace gas is

(A) H₂

(B) N₂

(C) CO₂

(D) CO

Question: 5

With increase in the calorific values of fuels, their adiabatic flame temperatures

(A) Increases

(B) Decreases

(C) May increase or decrease; depends on the quantity of products of combustion

(D) Remains unchanged