Fire
Trending Questions
Q.
Which forms of energy are produced in a fire? From where does this energy come?
Q. Foam type fire extinguishers cannot be used to put out electrical fires, due to the presence of which of these?
- HCl which burns with electricity.
- HF which burns with electricity.
- Dissolved salts.
- Dissolved base.
Q. Mark the correct statement(s) among the following:-
A. Water is a very good fire extinguisher as it cools downs fuels (such as wood) below their ignition temperature.
B. Water is a very good fire extinguisher for burning oils and electrical equipment since it covers the surface of oils.
C. Sand may act as a good fire extinguisher for burning oils.
A. Water is a very good fire extinguisher as it cools downs fuels (such as wood) below their ignition temperature.
B. Water is a very good fire extinguisher for burning oils and electrical equipment since it covers the surface of oils.
C. Sand may act as a good fire extinguisher for burning oils.
- A
- B
- C
- A and C
Q. Mention few example of exothermic reactions.
Q.
What is fire?
Q. Among the gases present in air, which one supports burning of a substance?
- Nitrogen
- Carbon dioxide
- Oxygen
- Water vapour
Q. Question 33
What are the three essential requirements to produce fire? How fire extinguisher is useful for controlling the fire.
What are the three essential requirements to produce fire? How fire extinguisher is useful for controlling the fire.