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

Related Mcqs:

In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of__________________?

A. Transportation of coal B. Drying of coal C. Combustion of coal by supplying it around the burner D. Preheating the primary air...

Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the____________________?

A. Decolourisation of sugar B. Solvent recovery from air and gases C. Absorption of gases and vapor D. Electrode manufacture...

Softening temperature of coal ash is a measure of the _____________ of coal?

A. Caking tendency B. Coking tendency C. Clinkering tendency D. Size stability...

Gross heating value of coal is ______________ the net heating value?

A. Higher than B. Lower than C. Same as D. None of these...

Removal of hydrogen from coke oven gas ___________________?

A. Increases its calorific value B. Decreases its calorific value C. Does not alter its calorific value D. Is not possible on commercial scale...