Pick the odd man out?

Related Mcqs:

In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of__________________?

A. Transportation of coal B. Drying of coal C. Combustion of coal by supplying it around the burner D. Preheating the primary air...

Which is the most matured coal ?

A. Lignite B. Bituminous C. Semi-anthracite D. Anthracite...

Caking coal is desirable for_________________?

A. Burning on travelling grate B. Coke making C. Burning on firebars D. All A., B. and C....

Hardgrove Grindability index of four coal samples are given below. Which of them is the easiest to grind ?

A. 50 B. 70 C. 85 D. 100...

A coal with high ash content is undesirable, as________________?

A. It is abrasive to the coal pulveriser (i.e. ball mill) and the combustion chamber B. The ash in molten condition gets absorbed in the pores of the refractory lining of the furnace and causes its spalling due to different co-efficient of expansion/contraction of the refractory and the ash C. The ash retains the sulphur … A coal with high ash content is undesirable, as________________?Read More...