Fuels and Combustion — Summer 2025

Discuss about the direct and indirect methods of coal liquefaction.

State the types of mining and basic system of production techniques for mining.

Cite any four industrial applications of coal washing.

With neat sketch explain the drilling process of petroleum and natural gas.

State any three industrial examples of solid, liquid and gaseous fuels.

Briefly explain the storage and handling of liquid fuels.

Write a short note on different types of coal combustion techniques.

Briefly explain the storage and handling of acetylene gas.

Enlist the refining products of petroleum.

With suitable examples differentiate between agro fuels and bio fuels.

Discuss about cleaning, purification and quality enhancement of gaseous fuels.

What is carbureted water gas? State the applications of carbureted water gas.

Discuss the different reactions involved in the production of producer gas.

Differentiate between diffusion flames and premixed flames.

Define stoichiometric air and excess air requirement for combustion.

What is net and gross calorific value of fuel? How to determine the calorific value at constant temperature?

What is adiabatic flame temperature? Derive an expression for constant pressure adiabatic flame temperature.

Define heat of combustion, heat of reaction and heat of formation.

Discuss the working principle and industrial applications of Fluidized bed combustion process.

With neat sketch discuss the working mechanism and industrial applications of rotary cup burners.

Briefly explain the mechanism and kinetics of combustion process.

With neat sketch discuss the working mechanism and industrial applications of atmospheric gas burners.

Why do furnaces operate at low efficiency? What are the methods by which furnace efficiencies can be improved?

State the two advantages and applications of walking hearth furnace.

State the industrial applications of pulverized fuel firing.