Q. Presence of force moisture in coal is most disadvantageous during its

View solution

Q. Tar is a better fuel than furnace oil, because of its

View solution

Q. With increase in moisture content of coal, its

View solution

Q. Main constituent of natural gas is

View solution

Q. For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will

View solution

Q. Pick out the wrong statement.

View solution

Q. Which of the following has the highest gross calorific value ?

View solution

Q. A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the

View solution

Q. Efficient burning of anthracite coal requires

View solution

Q. C/H ratio is the minimum in case of

View solution

Q. Ignition temperature decreases progressively from anthracite to lignite, because

View solution

Q. Which of the following fuel gases is heavier than air ?

View solution

Q. Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about____°C.

View solution

Q. Theoretical flame temperature of a fuel is that temperature which is attained, when the fuel is completely burnt using theoretical amount of air in

View solution

Q. Use of preheated air for combustion of fuel in the furnace, increases the

View solution

Q. Which of the following can be made into briquettes without the use of a binder ?

View solution

Q. As the equilibrium moisture content of the coal increases, its

View solution

Q. Which of the following is a measure of the agglutinating (i.e., binding) property of coal?

View solution

Q. During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.

View solution

Q. Blast furnace gas burns with a bluish flame, because of the presence of

View solution