Temperature of preheated air used for the transportation of pulverised coal through pipes to the burner of a boiler furnace is restricted to a maximum limit of about 300° C to avoid the Risk of explosion Chances of clinker formation Incomplete combustion of coal Requirement of large volume combustion chamber TRUE ANSWER : ? YOUR ANSWER : ?
Fuel consumption in coke making can be reduced by Stamped charging of coal Preheating, blending and de-ashing the coal Dry quenching of coke All of these TRUE ANSWER : ? YOUR ANSWER : ?
Bulk density of pulverised coal may be about __________ kg/m³. 100 1000 1500 500 TRUE ANSWER : ? YOUR ANSWER : ?
Calorific value of gobar gas (containing CH₄ = 60% , H₂ = 10% ; CO₂ = 30%) may be about __________ Kcal/Nm³. 1800 5400 3200 10200 TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is not applicable to fluidised bed combustion of coal? None of these Less heat transfer surface area is required in boilers It can not burn low grade coal It achieves higher fuel combustion efficiency TRUE ANSWER : ? YOUR ANSWER : ?
Main use of soft coke is as __________ fuel. None of these Domestic Blastfurnace Foundary TRUE ANSWER : ? YOUR ANSWER : ?
Dry air required to burn 1 kg of carbon completely may be around __________ kg. 38 11 2 20 TRUE ANSWER : ? YOUR ANSWER : ?
Fusion point of coal ash increases with increase in its __________ content. All of these Iron silicate Lime and magnesia Iron sulphate TRUE ANSWER : ? YOUR ANSWER : ?
Coke oven gas is stripped of its H₂S and mercaptans content by Bubbling it through dilute sulphuric acid Adsorption on silica gel Absorption in wash oil Adsorption on bog iron bed TRUE ANSWER : ? YOUR ANSWER : ?