Applied Chemistry Quiz: Fuels and Combustion

What is the definition of fuels?

• A chemical compound that does not release energy

• A type of renewable energy source

• Any combustible substance that produces energy when burned

• A non-combustible material

Which of the following is a characteristic of an ideal fuel?

• High ignition temperature

• High non-combustible matter

• High calorific value

• High moisture content

What is the Gross Calorific Value (GCV)?

• The heat produced when water vapor is condensed

• The heat required to ignite a fuel

• The total heat produced when a fuel is burned completely

• The heat produced by incomplete combustion

Which of the following fuels is classified as a gaseous fuel?

• Coal

• Natural gas

• Crude oil

• Wood

What does Dulong's formula calculate?

• The calorific value of a fuel

• The ignition temperature of a fuel

• The moisture content in coal

• The percentage of ash in coal

What is the significance of moisture content in fuels?

• It enhances the ignition temperature

• It has no effect on combustion

• It reduces the calorific value

• It increases the calorific value

What is the ideal ignition temperature for fuels?

• Moderate

• Zero

• Very high

• Very low

Which analysis method determines moisture, volatile matter, ash content, and fixed carbon in coal?

• Thermal analysis

• Ultimate analysis

• Proximate analysis

• Chemical analysis

What is the formula for calculating Net Calorific Value (NCV)?

• NCV = GCV + Latent heat of water vapor

• NCV = GCV - Latent heat of water vapor

• NCV = GCV * Latent heat of water vapor

• NCV = GCV / Latent heat of water vapor

What is the primary component of coal?

• Hydrogen

• Nitrogen

• Carbon

• Oxygen