Q. Washing of coal decreases its

View solution

Q. Which of the following petrographic constituents of coal is non-coking ?

View solution

Q. __________ has the widest inflammability limit (explosion limit) of all the gases.

View solution

Q. Percentage of methane in coke oven gas may be around

View solution

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

View solution

Q. __________ present in coal is not determined in its ultimate analysis.

View solution

Q. The calorific value of L.D. converter gas is about __________ Kcal/Nm³ .

View solution

Q. __________ prohibits the use of alcohols directly in petrol engines.

View solution

Q. Higher fuel combustion efficiency can not be achieved by

View solution

Q. Softening temperature of coal ash is a measure of the __________ of coal.

View solution

Q. A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be

View solution

Q. Presence of phosphorous in metallurgical coal

View solution

Q. Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm.

View solution

Q. Fat coal' means a coal having

View solution

Q. For every 10% increase in the excess air; the fuel consumption increases by __________ percent.

View solution

Q. Fusion point of coal ash increases with increase in its __________ content.

View solution

Q. Pick out the wrong statement.

View solution

Q. Dry air required to burn 1 kg of carbon completely may be around __________ kg.

View solution

Q. Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is

View solution

Q. Atomising steam to fuel oil ratio in a burner should be around

View solution