1000+ Fuels and Combustion Objective Type Questions and Answers - 2

Question: 6

The largest heat loss in the heat balance of a coal fird boiler due to

(A) hydrogen in the fuel

(B) moisture in the air

(C) radiation loss

(D) dry flue gas loss

Question: 7

Furnace wall heat loss does not depend on the

(A) thermal conductivity of wall brick

(B) material of stock to be heated

(C) velocity of air around the furnace

(D) temperature of external wall surface

Question: 8

Which of the following fuels has the highest calorific value (in kcal/kg)

(A) Natural gas

(B) Hydrogen

(C) LPG

(D) Petrol

Question: 9

Which of the following has the highest theoretical flame temperature?

(A) acetylene

(B) blast furnace gas

(C) coke oven gas

(D) hydrogen

Question: 10

Main use of hard coke produced by high temperature carbonization is in the

(A) domestic ovens

(B) sinter making

(C) cupola in foundries

(D) iron blast furnace