Froth floatation is used for Removing ash from the coal based on difference in specific gravity of coal and ash Washing fine coal dust (< 0.5 mm size) All of these Washing lump coal (> 80 mm size) TRUE ANSWER : ? YOUR ANSWER : ?
Junker's calorimeter is used to determine the calorific value of None of these Pulverised coal Gaseous fuels Fuel oil TRUE ANSWER : ? YOUR ANSWER : ?
Flue gas discharge velocity through chimney of a big thermal power plant may be around __________ m/sec. 10 50 0.5 500 TRUE ANSWER : ? YOUR ANSWER : ?
Blast furnace coke is made from coal by Medium temperature carbonisation Heating the coal in an oven in presence of air High temperature carbonisation Low temperature carbonisation TRUE ANSWER : ? YOUR ANSWER : ?
In low temperature carbonisation of coal, the Yield of tar is about 3% of dry coal Yield of coke oven gas is 290 Nm³ /ton dry coal Temperature maintained is 700°C Volatile matter in coke is zero TRUE ANSWER : ? YOUR ANSWER : ?
Grindability index of a coal is 100. It implies that the Power consumption in grinding the coal will be very high Coal can be pulverised with great difficulty Coal can't be pulverised Coal can be easily pulverised TRUE ANSWER : ? YOUR ANSWER : ?
Width of the coke oven towards coke side is slightly more than that on pusher side to None of these Facilitate uniform heating of the oven Increase the output of the coke Facilitate easy discharging of coke as it swells during carbonisation TRUE ANSWER : ? YOUR ANSWER : ?
A fuel with high heat release rate will Have high calorific value Have high adiabatic flame temperature Require smaller combustion chamber None of these TRUE ANSWER : ? YOUR ANSWER : ?
Orsat apparatus is meant for Finding out combustion efficiency Gravimetric analysis of flue gas Direct determination of nitrogen in flue gas by absorbing it in ammoniacal cuprous chloride None of these TRUE ANSWER : ? YOUR ANSWER : ?
Dust content in raw blast furnace gas is about __________ gm/Nm³ , hence it is cleaned to the dust level of about < 10 mg /Nm³ before use. 70-100 15-30 150-200 43832 TRUE ANSWER : ? YOUR ANSWER : ?