WorksheetsChallenging Refrigeration Principles Quiz
Total questions: 30
Worksheet time: 15mins
Which of the following is a way heat can move from one place to another?
Conduction
Reflection
Absorption
Evaporation
What is the main job of a compressor in a refrigeration cycle?
To cool the refrigerant
To increase the pressure of the refrigerant
To store the refrigerant
To clean the refrigerant
Which property of a refrigerant helps it absorb heat from inside a fridge?
High boiling point
Low boiling point
High density
Low density
What does the evaporator do in a fridge?
Heats the air
Absorbs heat from inside the fridge
Compresses the refrigerant
Releases heat outside
Which of these is a way to make a fridge use less electricity?
Leave the door open
Use good insulation
Put hot food inside
Use more refrigerant
Which part of the refrigeration cycle releases heat to the outside air?
Compressor
Condenser
Evaporator
Expansion valve
Which of these is a greenhouse gas often used in old fridges?
Oxygen
Carbon dioxide
CFCs
Nitrogen
What is the main reason for using new types of refrigerants?
They are cheaper
They are better for the environment
They are heavier
They are easier to find
Which law explains how gases change when they are heated or cooled?
Newton’s Law
Boyle’s Law
Ohm’s Law
Hooke’s Law
What does the Montreal Protocol aim to protect?
Oceans
Ozone layer
Forests
Rivers
Which of these is a common refrigerant used in modern fridges?
R-134a
R-12
R-22
R-410A
What is the main effect of refrigerants leaking into the air?
They make the air smell nice
They can harm the environment
They help plants grow
They clean the air
Which part of the fridge lowers the pressure of the refrigerant?
Compressor
Expansion valve
Condenser
Evaporator
What is the main job of insulation in a fridge?
To keep the fridge warm
To keep the cold air inside
To make the fridge heavier
To help the compressor
Which of these is NOT a heat transfer mechanism?
Conduction
Radiation
Convection
Magnetism
What is the main reason for the Kyoto Protocol?
To protect animals
To reduce greenhouse gases
To clean rivers
To save electricity
Which of these is a liquid at room temperature and used in fridges?
Water
Refrigerant
Oil
Air
What happens to the refrigerant in the condenser?
It gets colder
It changes from a gas to a liquid
It gets thicker
It changes from a liquid to a gas
Which of these helps a fridge work better?
Putting it in a hot room
Keeping the door closed
Overloading it with food
Using old refrigerants
Which law says that the pressure of a gas goes up if you squeeze it into a smaller space?
Boyle’s Law
Charles’s Law
Newton’s Law
Hooke’s Law
What is the main job of the expansion valve in a fridge?
To heat the refrigerant
To lower the pressure of the refrigerant
To clean the refrigerant
To store the refrigerant
Which of these is a way to make a fridge more energy efficient?
Use thicker insulation
Use more refrigerant
Leave the door open
Put hot food inside
Which of these is a harmful effect of old refrigerants like CFCs?
They make food taste better
They damage the ozone layer
They help plants grow
They clean the air
What is the temperature inside a fridge usually kept at?
20°C
4°C
10°C
0°C
Which of these is a gas law used in refrigeration?
Boyle’s Law
Ohm’s Law
Newton’s Law
Hooke’s Law
What is the main reason for using insulation in a fridge?
To keep the cold air inside
To make the fridge look nice
To help the compressor
To make the fridge heavier
Which of these is a way heat can move through a solid?
Conduction
Convection
Radiation
Evaporation
Which protocol helps countries work together to protect the ozone layer?
Montreal Protocol
Kyoto Protocol
Paris Agreement
Geneva Convention
Which of these is a good thing about new refrigerants?
They are better for the environment
They are heavier
They are more expensive
They are harder to find
Which of these is a way to help the environment when using fridges?
Use fridges with eco-friendly refrigerants
Use fridges with old refrigerants
Leave the fridge door open
Put hot food inside
