Combustion and Flame (Best)

What is Combustion?

• A chemical reaction between a fuel and an oxidizing agent
• A type of animal
• A type of weather phenomenon
• A type of plant

Calorific Value of Hydrogen.(KJ/KG)

• 141.86
• 75.50
• 200.75
• 50.32

Which of the Following produces a Flame?

• Ice cream
• Watermelon
• Substances such as wood, paper, and gas produce a flame when they undergo combustion.
• Cotton candy

Sun is made of which gas?

Which is the cleanest fuel of the following?

• Hydrogen
• Gasoline
• Diesel
• Coal

What is Global Warming?

• The cooling of Earth's climate system due to human activities
• The natural process of Earth's climate system without any human influence
• The increase in the number of icebergs due to human activities
• The long-term heating of Earth’s climate system due to human activities, primarily the release of greenhouse gases.

Which of the following fuel vapourise during combustion?

• Wood and metal
• Water and sand
• Plastic and paper
• LPG and CNG

Which fuel is used in heavy motor vehicles?

Which fuels are used in vehicles?

• Coal

• CNG

• LPG

• Petrol

What are fuels?

• Substances that can be inflated to produce energy
• Substances that can be dissolved to produce energy
• Substances that can be frozen to produce energy
• Substances that can be burned to produce energy on a large scale