Q. Which of the following is not a binder for coal briquetting ?

View solution

Q. The liquid used for the washing of coal in an industrial coal washery is a mixture of water and

View solution

Q. Spontaneous combustion of coal on storage results due to

View solution

Q. High temperature carbonisation of coal produces

View solution

Q. Which of the following is the most poisonous gas ?

View solution

Q. Bomb calorimeter can be used to determine the __________ of the coal.

View solution

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

View solution

Q. In low temperature carbonisation (as compared to high temperature carbonisation) of coal

View solution

Q. Washing of coal does not reduce its

View solution

Q. Coke having higher porosity has

View solution

Q. Calorific value of coke oven gas is around __________ Kcal/Nm³.

View solution

Q. Highly caking coals

View solution

Q. Main use of hard coke produced by high temperature carbonisation is in the

View solution

Q. Hard pitch is used for making

View solution

Q. Supply of excess air for complete combustion of fuel is necessitated to facilitate

View solution

Q. A coal gasifier opearating at 20 atm. (e.g. Lugri gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having

View solution

Q. Combustion of pulverised fuel

View solution

Q. Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C.

View solution

Q. Low temperature oxidation of coal during storage does not decrease its

View solution

Q. With increase in the oxygen content of the coal, its __________ decreases.

View solution