FUELS AND COMBUSTION QUIZ

Blast furnace gas compared to coke oven gas has

Higher calorific value

Lower ignition temperature

Narrower limit of inflammability

Lower theoretical flame temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

By-products are __________ recovered in 'Beehive ovens'.

Partially

Not at all

Negligibly

Fully

TRUE ANSWER : ?
YOUR ANSWER : ?

Power alcohol as compared to straight run gasoline has lower

Specific gravity

Viscosity

Calorific value

Octane number

TRUE ANSWER : ?
YOUR ANSWER : ?

Presence of __________ in a dry gaseous fuel does not contribute to its calorific value.

Sulphur

Carbon

Hydrogen

Oxygen

TRUE ANSWER : ?
YOUR ANSWER : ?

A coal with high ash content is undesirable, as

All of these

The ash retains the sulphur & phosphorus and thus affects the quality of products in metallurgical furnace apart from increasing the slag volume. Besides, it may fuse and stick to the boiler tubes

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

It is abrasive to the coal pulveriser (ie.g. ball mill) and the combustion chamber

TRUE ANSWER : ?
YOUR ANSWER : ?