Fire Triangle

Q. What is the difference between combustion and flame?

Q.

You may have seen that when a person accidentally catches fire, people put a blanket around him. Identify the reason for this.

1. Blanket reduces burning

2. Blanket is non combustible

3. Material of blanket stops fire

4. Blanket cuts off the supply of oxygen which in turn stops combustion.

Q. Question 2 (d)
Fill in the blank.
Fire produced by oil cannot be controlled by ___.

Q.

An electric spark is struck between two electrodes placed near each other in a closed tank full of Will the petrol catch fire ? Explain your answer.

Q. Question 23
Match the items of Column A with the items of Column B.

Q.

On placing an inverted tumbler over a burning candle, the flame extinguishes after some time. This is because of the non-availability of:

1. Oxygen

2. Water vapors

3. Carbon dioxide

4. Wax

Q.

Which of the following factors are essential for a fire to start -

1. All of the given options are right.

2. Heat

3. Air(Oxygen)

4. Fuel

Q.

Petrol burns with flame.

1. True

2. False

Q. Question 16
Fill in the blanks in the following sentences.
(a) A ____________ process in which a substance reacts with __________ to give off heat is called combustion.

(b) When the clothes of a person catch __________, the person is covered with a __________ to extinguish fire.

(c) The __________ temperature at which a substance catches fire is called its ignition temperature.

(d) The substances which have very ________________ ignition temperature and can easily catch fire with a flame are called __________ substances.

(e) The substances which vapourise during __________, give flame.

Q. Identify the measures which could be taken to stop a fire.

1. We should cut off the supply of oxygen.

2. We should remove combustible substance.

3. We should cool down combustible substance below ignition temperature.

4. All of these.

Q.

An electric spark is passed between two electrodes placed near Each Other inside a tightly closed in can full of petrol and diesel will the petrol and diesel catch fire give reason in support of your answer

Q.

Which of the following arrangement represents the fire triangle?

1. Hydrogen, fuel and light.

2. Oxygen, fuel and wood.

3. Oxygen, fuel and heat.

4. Hydrogen, oxygen and light.

Q. Which of the following is not a component of the fire triangle?

1. Oxygen
2. Carbon dioxide
3. Heat
4. Fuel

Q.

Which of the following is necessary for combustion?

1. Both attainment of ignition temperature and adequate amount of oxygen

2. Attainment of ignition temperature

3. Adequate amount of oxygen

4. None of these

Q.

Which of the following arrangement represents the fire triangle?

1. Oxygen, Fuel and Heat.

2. Hydrogen, Fuel and Light.

3. Oxygen, Fuel and Wood.

4. Hydrogen, oxygen and light.

Q.

Apart from heat and fuel, which other component is essential to start a fire ?

1. Wood

2. Gas

3. Oxygen

4. Friction

Q.

By giving example, state three conditions for Combustion.

Q.

Which of the following factors are essential for a fire to start -

1. Heat

2. Air(Oxygen)

3. Fuel

4. All of the given options

Q.

You may have seen that when a person accidentally catches fire, people put a blanket around him. Identify the reason for this.

1. The blanket is non-combustible.

2. The blanket cuts off the supply of oxygen which in turn stops combustion.

3. The material of the blanket stops fire.

4. The blanket reduces burning.

Q.

What is the difference between COMBUSTION and INGNITION TEMPERATURE.
3.)What is the difference between INDUSTRY, FACTORY and POWER PLANT.
4.)What is firewood?

Q.

You may have seen that when a person accidentally catches fire, people put a blanket around him. Identify the reason for this.

1. The material of the blanket stops fire.

2. The blanket is non-combustible.

3. The blanket cuts off the supply of oxygen which in turn stops combustion.

4. The blanket reduces burning.

Q. Question 9
It is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain.

Q.

You may have seen that when a person accidentally catches fire, people put a blanket around him. Identify the reason for this.

1. The material of the blanket stops fire.

2. The blanket is non-combustible.

3. The blanket cuts off the supply of oxygen which in turn stops combustion.

4. The blanket reduces burning.

Q.

We wrap the burning object in woollen blanket to put off the fire and stop it from spreading further.

Q.

You may have seen that when a person accidentally catches fire, people put a blanket around him. Identify the reason for this.

1. Blanket reduces burning

2. Material of blanket stops fire

3. Blanket is non combustible

4. Blanket cuts off the supply of oxygen which in turn stops combustion.

Q. State the conditions under which combustion occurs.

Q.

You may have seen that when a person accidentally catches fire, people put a blanket around him. Identify the reason for this.

1. Material of blanket stops fire

2. Blanket cuts off the supply of oxygen which in turn stops combustion.

3. Blanket reduces burning

4. Blanket is non combustible

Q.

Which of the following arrangement represents the fire triangle?

1. Hydrogen, Fuel and Light.

2. Oxygen, Fuel and Wood.

3. Oxygen, Fuel and Heat.

4. Hydrogen, oxygen and light.

Q.

Apart from heat and fuel, which other component is essential to start a fire ?

1. Oxygen

2. Friction

3. Wood

4. Gas

Q.

Which of the following factors are essential to ignite a fire?

1. All of these

2. Heat

3. Air (oxygen)

4. Fuel