Which of the following fuels is the best for burning on chain grate stoker ?

A. Non-caking coal
B. Caking coal
C. Coking coal
D. Pulverised coal

Desirable “Micum Index” values of metallurgical coke are ___________________?

A. M40 > 78% and M10 < 10%
B. M40 > 4% and M10 10% and M10 98% and M10 < 2%

The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to___________________?

A. Minimise its corrosion
B. Avoid radiation heat loss
C. Make it look attractive
D. None of these

Advantages of fluidised bed combustion are ____________________?

A. Reduced NOx formation in flue gas
B. Lower furnace operating temperature
C. High heat transfer rate
D. All A., B. & C.

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

With increase in C/H ratio of a fuel, the amount of CO2 formed on its complete combustion____________________?

A. Increases
B. Decreases
C. Remain same
D. Either A. or B., depends on other factors

‘Fat coals’ are those coals which have very high____________________?

A. Caking capacity
B. Volatile matter content
C. Fusion point of its ash
D. Inherent moisture content

Dry air required to burn 1 kg of carbon completely may be around ______________ kg?

A. 11
B. 2
C. 20
D. 38

Catalyst used in Fischer-Tropsch process is_______________?

A. Nickel
B. Zinc oxide
C. Alumina
D. Thorium oxide

Nitrogen present in the flue gas is determined in the Orsat apparatus by absorbing it in_____________________?

A. KOH
B. Ammoniacal cuprous chloride
C. Pyrogallol solution
D. None of these