Podcast
Questions and Answers
Which of the following is NOT considered a combustible substance?
Which of the following is NOT considered a combustible substance?
Ignition temperature refers to the highest temperature at which a substance can catch fire.
Ignition temperature refers to the highest temperature at which a substance can catch fire.
False
What are the three essential requirements for combustion?
What are the three essential requirements for combustion?
Fuel, air (oxygen), and ignition temperature.
Substances like petrol and alcohol are classified as ______ substances.
Substances like petrol and alcohol are classified as ______ substances.
Signup and view all the answers
Match the following types of substances with their classifications:
Match the following types of substances with their classifications:
Signup and view all the answers
Which statement about water as a fire extinguisher is correct?
Which statement about water as a fire extinguisher is correct?
Signup and view all the answers
Carbon dioxide ($CO_2$) is suitable for use on petrol fires.
Carbon dioxide ($CO_2$) is suitable for use on petrol fires.
Signup and view all the answers
What is the primary reason water is unsuitable for electrical equipment fires?
What is the primary reason water is unsuitable for electrical equipment fires?
Signup and view all the answers
$CO_2$ extinguishes fires by forming a _____ over the flame.
$CO_2$ extinguishes fires by forming a _____ over the flame.
Signup and view all the answers
Match the fire extinguishing methods to their primary characteristics:
Match the fire extinguishing methods to their primary characteristics:
Signup and view all the answers
What gas is produced when concentrated sulphuric acid reacts with potassium bicarbonate?
What gas is produced when concentrated sulphuric acid reacts with potassium bicarbonate?
Signup and view all the answers
Spontaneous combustion involves a material igniting only when exposed to external heat.
Spontaneous combustion involves a material igniting only when exposed to external heat.
Signup and view all the answers
What is the main effect of covering a person with a blanket when their clothes catch fire?
What is the main effect of covering a person with a blanket when their clothes catch fire?
Signup and view all the answers
What was used in ancient Egypt as matches over 5000 years ago?
What was used in ancient Egypt as matches over 5000 years ago?
Signup and view all the answers
Modern safety matches contain white phosphorus in their head composition.
Modern safety matches contain white phosphorus in their head composition.
Signup and view all the answers
An example of rapid combustion is the burning of __________.
An example of rapid combustion is the burning of __________.
Signup and view all the answers
Why does a matchstick catch fire when rubbed against a rough surface?
Why does a matchstick catch fire when rubbed against a rough surface?
Signup and view all the answers
Match the following types of combustion with their descriptions:
Match the following types of combustion with their descriptions:
Signup and view all the answers
A paper cup can boil water without burning because the ignition temperature of the paper is not reached due to the presence of __________.
A paper cup can boil water without burning because the ignition temperature of the paper is not reached due to the presence of __________.
Signup and view all the answers
Which method does water use to control a fire?
Which method does water use to control a fire?
Signup and view all the answers
Match the fire-extinguishing methods with their corresponding features:
Match the fire-extinguishing methods with their corresponding features:
Signup and view all the answers
Water is the best extinguisher for electrical fires.
Water is the best extinguisher for electrical fires.
Signup and view all the answers
CO₂ is best for __________ equipment fires.
CO₂ is best for __________ equipment fires.
Signup and view all the answers
