30 Questions
What is ignition temperature?
The minimum temperature needed to initiate self-sustained combustion
What is adiabatic compression?
Producing heat by compressing a liquid or gas
What can cause spontaneous heating?
Oxidation giving off heat
Under what conditions can spontaneous heating lead to ignition?
When the material insulates more heat than it dissipates
What are hypergolic mixtures mainly used for?
To propel missiles or rockets
How are friction sparks created?
When two hard surfaces touch with sufficient force
Which method of heat transfer involves the movement of air or liquid?
Convection
Which of the following is a good heat conductor?
Aluminum
What is the major source of fire spread influenced by convection?
Heat movement from floor to floor
Which product is released as heat and flame when a fuel burns?
Thermal energy
What is the main difference between heat waves (infrared rays) and light waves?
Length
Which method of heat transmission involves the transfer of energy as an electromagnetic wave without an intervening medium?
Radiation
What is the main difference between gases and vapours in terms of volume?
Gases do not have specific volume, while vapours tend to assume the shape of their container.
What will happen if a gas or vapour has a vapour density less than air?
It will rise and tend to dissipate.
Which components are described by the Fire Triangle as necessary to create fire?
Oxygen, heat, and fuel
What happens if any one of the components in the Fire Triangle is removed?
The fire cannot exist.
What does the Fire Tetrahedron provide an explanation for?
Why certain chemicals burn in the absence of oxygen.
Which of the following is NOT one of the components of the Fire Tetrahedron?
Heat
What does the numeral in the fire extinguisher classification indicate?
The fire extinguishing potential of the extinguisher
What does the letter in the fire extinguisher classification refer to?
The class of fire the extinguisher is designed for
How is 'appreciable depth' defined in relation to flammable liquid?
A depth greater than 6 mm
What does a 'dual or triple classification' on a fire extinguisher imply?
It can be used for multiple types of fires
What is the basis of fire extinguisher classification according to the text?
Physical fire extinguishing potential
How does an expert compare to a novice in terms of fire extinguishing capacity with the same quantity of agent?
An expert can extinguish more fire than a novice
Which extinguishing agent absorbs more heat per volume than any other agent?
Carbon Dioxide
Which type of fire extinguisher is generally safe only for Class A fires and is electrically conductive?
Dry Powder
Which type of foam has excellent wetting and penetrating properties due to low surface tension?
Class A Foam
What can happen if water is used as an extinguishing agent in a confined or unventilated space?
Cold shock to electrical equipment
What is one limitation of Dry Chemical extinguishers?
Leaves a residue
What is the primary advantage of Wet Agents in fire extinguishing?
Saponification turns oils and fats into soap/foam
Learn about the transfer of heat through conduction and convection. Discover which materials are good and poor conductors of heat, as well as how heat is transferred through the movement of air or liquid.
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