Most people take their refrigerators for granted, except when they break down. While the main idea of how refrigerators work is fairly simple, how they are built is more complex. Chill out with this cool quiz to test your knowledge of how refrigerators work.
Question 1 of 20
What is the core principle that makes refrigerators work?
Question 2 of 20
How long will it take the bacteria in your milk to spoil it if you leave it unrefrigerated?
Question 3 of 20
What is special about the liquid inside your refrigerator's coils?
Question 4 of 20
Why does your refrigerator need a compressor?
Question 5 of 20
What does your refrigerator's expansion valve do?
Question 6 of 20
At what temperature does water start to boil?
Question 7 of 20
What happens to water's boiling point as you go higher in the mountains?
Question 8 of 20
Why does liquid nitrogen feel cold to humans even while it is boiling?
Question 9 of 20
What is a refrigerator's regenerating cycle?
Question 10 of 20
After the refrigerant leaves your refrigerator's compressor, where does it go next?
Question 11 of 20
What creates the low-pressure area in a refrigerator's inner coils?
Question 12 of 20
At what temperature does ammonia boil?
Question 13 of 20
Why don't refrigerators use pure ammonia as a refrigerant?
Question 14 of 20
When were CFCs developed?
Question 15 of 20
Why did people stop using CFCs as refrigerants in new refrigerators?
Question 16 of 20
What substances are used in the closed refrigeration system of a gas refrigerator?
Question 17 of 20
What does the separator in a gas refrigerator do?
Question 18 of 20
What is the Peltier effect?
Question 19 of 20
How do instant cold packs work?
Question 20 of 20