Q. Bituminous coal

View solution

Q. Ratio of primary air to secondary air increases with increase in the rank of coal, because the

View solution

Q. Higher percentage of ash in coal meant for the production of metallurgical grade coke

View solution

Q. Combustion of pulverised coal as compared to that of lump coal

View solution

Q. 'Wobbe index' is a characteristic of

View solution

Q. A coal with high ash content is undesirable, as

View solution

Q. Presence of free moisture in coal during its high temperature carbonisation

View solution

Q. Higher efficiency in the combustion of solid fuel can not be achieved by

View solution

Q. A coal containing very high percentage of durain is called __________ coal.

View solution

Q. During combustion of gaseous fuels, deficiency of air

View solution

Q. Gross and net calorific value of a fuel will be the same

View solution

Q. Low temperature carbonisation

View solution

Q. Gray King Assay and Swelling Index of a coal is a measure of its

View solution

Q. Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent.

View solution

Q. Prime coking coal is always blended with medium or non- coking coal before ear-bonisation

View solution

Q. Actual flame temperature is always lower than the adiabatic flame temperature, because there is

View solution

Q. Coke oven gas consists mainly of

View solution

Q. Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around __________ Nm³ .

View solution

Q. Coking coals are invariably

View solution

Q. Which of the following accounts for maximum energy loss in a boiler ?

View solution