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

Q. 'Fuel' can be defined as a substance which produces heat by

View solution

Q. Washing of coal

View solution

Q. Which of the following is not a manufactured fuel ?

View solution

Q. Coke oven gas constitutes mainly of

View solution

Q. Gross heating value of coal is __________ the net heating value.

View solution

Q. Which of the following is a rich fuel gas ?

View solution

Q. Low temperature carbonisation of coal produces

View solution

Q. Blast furnace coke is made from coal by

View solution

Q. Yield of blast furnace gas is about __________ Nm³ /ton of pig iron.

View solution

Q. Coke oven gas is stripped of its H₂S and mercaptans content by

View solution

Q. In Lurgi coal gasifier,

View solution

Q. Mineral matter content (M) and ash content (A) in coal are approximately related as

View solution