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# Olympiad Test: Combustion And Flame - 2

## 15 Questions MCQ Test Science Olympiad Class 8 | Olympiad Test: Combustion And Flame - 2

Description
This mock test of Olympiad Test: Combustion And Flame - 2 for Class 8 helps you for every Class 8 entrance exam. This contains 15 Multiple Choice Questions for Class 8 Olympiad Test: Combustion And Flame - 2 (mcq) to study with solutions a complete question bank. The solved questions answers in this Olympiad Test: Combustion And Flame - 2 quiz give you a good mix of easy questions and tough questions. Class 8 students definitely take this Olympiad Test: Combustion And Flame - 2 exercise for a better result in the exam. You can find other Olympiad Test: Combustion And Flame - 2 extra questions, long questions & short questions for Class 8 on EduRev as well by searching above.
QUESTION: 1

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QUESTION: 2

### For combustion to take place, we need

Solution:

Three things are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel.

• There must be Fuel to burn.
• There must be Air to supply oxygen.
• There must be Heat (ignition temperature) to start and continue the combustion process.
QUESTION: 3

### To extinguish a flame, which of these methods is used?

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QUESTION: 4

The combustion in which a material bursts into flames without the application of heat is called

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QUESTION: 5

Which of these material represents spontaneous combustion?

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QUESTION: 6

Which of these is a solid pollutant?

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QUESTION: 7

SPM, also called dangerous pollutants, means

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QUESTION: 8

The coldest zone of flame is –––– zone.

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QUESTION: 9

In which zone is carbon monoxide burns with a blue colour at the base of the wick?

Solution:

Blue zone: This is due to the combustion of incompletely combusted carbon-monoxide.

QUESTION: 10

The SI unit of calorific value is

Solution:
QUESTION: 11

The calorific value of petrol is

Solution:

The calorific value of diesel fuel is roughly 45.5 MJ/kg (megajoules per kilogram), slightly lower than petrol which is 45.8 MJ/kg.

QUESTION: 12

A fuel is considered good if it

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QUESTION: 13

Burning of magnesium is an example of which combustion?

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QUESTION: 14

The most commonly used fire extinguisher is soda-acid fire extinguisher. Cylinder is filled with a solution of

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QUESTION: 15

Which of these is gaseous fuel?

Solution: