1000+ Fuels and Combustion Online Test Questions & Answers - 2

Question: 6

Main constituents of benzol are

(A) ammonia and phenol

(B) anthracene and phenol

(C) tar and creosote

(D) benzene, toluene and xylene

Question: 7

As the equilibrium moisture content of the coal increases, its

(A) bulk density decreases

(B) swelling number increases

(C) swelling number decreases

(D) calorific value increases

Question: 8

Coalification means the

(A) direct hydrogenation of coal

(B) complete combustion of coal

(C) underground gasification of coal

(D) process of conversion of lignite into anthracite

Question: 9

A coal that softens and fuses on heating is

(A) caking

(B) non-caking

(C) classified

(D) carbonised

Question: 10

A coal containing high amount of volatile matter will have

(A) low adiabatic flame temperature

(B) high fusion point of its ash

(C) very little ash content

(D) low ignition temperature