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IFE Level 3 Certificate in Fire Science, Operations, Fire Safety and Management Unit 1: Fire Engineering Science 3. Heat and Temperature Assessment Criteria Knowledge, Understanding and Skills IFE Level 3 Certificate in Fire Science, Operations, Fire Safety and Management Unit 1: Fire Engineering Science 3. Heat and TemperatureAssessment Criteria Knowledge, Understanding and Skills3.4 Define and explain the terms used in the context of heat transfer • Specific heat • Change of state • Latent heat • Latent heat of vaporisation • The effect of change of pressure on the boiling point and latent heat • Latent heat of fusion • Cooling by evaporation 3.5 Describe and explain processes of heat transmission • Conduction • Convection • Radiation 3.6 Describe and explain the principles of thermal expansion • Solids o The coefficient of linear expansion o Nickel-iron alloy (Invar) o Expansion in metal structures o Thermostats o The coefficient of superficial and cubical expansion of solids • Liquids o Cubical expansion o The effect of expansion on density • Gases (Liquefaction) o Critical temperature and pressure o Liquefied gases in cylinders • Sublimation 3.7 Define the Gas Laws and undertake calculations involving them • Boyle’s Law • Charles’s Law • Law of Pressures • The General Gas Law

What is the specific heat of a substance?
The amount of heat required to raise the temperature of one gram of the substance by one degree Celsius
The amount of heat required to raise the temperature of one kilogram of the substance by one degree Celsius
The amount of heat required to raise the temperature of one liter of the substance by one degree Celsius
The amount of heat required to raise the temperature of one mole of the substance by one degree Celsius
Which term describes the process of changing from one state of matter to another without a change in temperature?
Change of state
Latent heat
Conduction
Radiation
What is the latent heat of vaporization?
The amount of heat required to change a substance from a solid to a liquid state
The amount of heat required to change a substance from a liquid to a gas state
The amount of heat required to change a substance from a gas to a liquid state
The amount of heat required to change a substance from a liquid to a solid state
How does a change in pressure affect the boiling point and latent heat of a substance?
An increase in pressure raises the boiling point and increases the latent heat
An increase in pressure lowers the boiling point and decreases the latent heat
A decrease in pressure raises the boiling point and increases the latent heat
A decrease in pressure lowers the boiling point and decreases the latent heat
What is the latent heat of fusion?
The amount of heat required to change a substance from a solid to a liquid state
The amount of heat required to change a substance from a liquid to a gas state
The amount of heat required to change a substance from a gas to a liquid state
The amount of heat required to change a substance from a liquid to a solid state
How does cooling by evaporation occur?
Heat is transferred through direct contact between objects
Heat is transferred through the movement of fluid particles
Heat is transferred through electromagnetic waves
Heat is transferred through the expansion and contraction of materials
Which process of heat transmission occurs through direct contact between objects?
Conduction
Convection
Radiation
Expansion
How does convection transfer heat?
Through direct contact between objects
Through the movement of fluid particles
Through electromagnetic waves
Through the expansion and contraction of materials
Which process of heat transmission occurs through electromagnetic waves?
Conduction
Convection
Radiation
Expansion
What is the coefficient of linear expansion for solids?
The ratio of the change in length to the original length per degree Celsius
The ratio of the change in volume to the original volume per degree Celsius
The ratio of the change in pressure to the original pressure per degree Celsius
The ratio of the change in density to the original density per degree Celsius
Which alloy has a low coefficient of linear expansion and is used in precision instruments?
Nickel-iron alloy (Invar)
Copper-zinc alloy (Brass)
Aluminum-silicon alloy (Silumin)
Iron-carbon alloy (Steel)
How does expansion occur in metal structures?
Through the absorption of heat energy
Through the release of heat energy
Through the movement of metal particles
Through the transfer of electromagnetic waves
What is the coefficient of superficial expansion for solids?
The ratio of the change in length to the original length per degree Celsius
The ratio of the change in volume to the original volume per degree Celsius
The ratio of the change in area to the original area per degree Celsius
The ratio of the change in density to the original density per degree Celsius
What is the coefficient of cubical expansion for solids?
The ratio of the change in length to the original length per degree Celsius
The ratio of the change in volume to the original volume per degree Celsius
The ratio of the change in area to the original area per degree Celsius
The ratio of the change in density to the original density per degree Celsius
How does expansion affect the density of liquids?
Expansion increases the density of liquids
Expansion decreases the density of liquids
Expansion has no effect on the density of liquids
Expansion causes liquids to change state
What are the critical temperature and pressure of a gas?
The temperature and pressure at which a gas changes state
The temperature and pressure at which a gas becomes a solid
The temperature and pressure at which a gas becomes a liquid
The temperature and pressure above which a gas cannot be liquefied, regardless of pressure
How are liquefied gases stored in cylinders?
At room temperature and pressure
At low temperature and high pressure
At high temperature and low pressure
At extreme temperature and pressure
What is sublimation?
The process of changing from a solid to a liquid state
The process of changing from a liquid to a gas state
The process of changing from a gas to a liquid state
The process of changing from a solid to a gas state without passing through the liquid state
What is Boyle's Law?
The volume of a gas is directly proportional to its temperature, assuming constant pressure
The pressure of a gas is directly proportional to its temperature, assuming constant volume
The volume of a gas is inversely proportional to its pressure, assuming constant temperature
The pressure of a gas is inversely proportional to its temperature, assuming constant volume
What is Charles's Law?
The volume of a gas is directly proportional to its temperature, assuming constant pressure
The pressure of a gas is directly proportional to its temperature, assuming constant volume
The volume of a gas is inversely proportional to its pressure, assuming constant temperature
The pressure of a gas is inversely proportional to its temperature, assuming constant volume
What is the Law of Pressures?
The pressure of a gas is directly proportional to its temperature, assuming constant volume
The volume of a gas is inversely proportional to its pressure, assuming constant temperature
The pressure of a gas is inversely proportional to its temperature, assuming constant volume
The pressure of a gas is directly proportional to its volume, assuming constant temperature
What is the General Gas Law?
A combination of Boyle's Law and Charles's Law
A combination of Boyle's Law and the Law of Pressures
A combination of Charles's Law and the Law of Pressures
A combination of Boyle's Law, Charles's Law, and the Law of Pressures Note: The remaining questions will be added in subsequent responses.
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