Which of the following has the highest heat of combustion ?

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In flue gas analysis by Orsat’s apparatus, carbon monoxide is absorbed by__________________?

A. Cuprous chloride B. Potassium hydroxide C. Alkaline pyrogallol solution D. None of these...

Percentage of carbon monoxide in blast furnace gas may be around ____________________ ?

A. 8 B. 14 C. 22 D. 52...

Coals used for the generation of producer gas should have ____________________?

A. High caking index B. Low fusion point of ash C. High volatile matter content D. Very low ash content (8-10%)...

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...