Heat Pumps quiz

More questions about Heat Pumps

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Easy

   About how warm is a heat pump's water for underfloor heating?

   Answer: 35 °C

   Why: Classic radiators usually need water at about 45 to 55 °C to heat a room properly, far warmer than underfloor heating.

2. 2 Medium

   Which air heat pump design keeps everything outdoors in one box?

   Answer: Monobloc

   Why: With the refrigerant circuit sealed in the outdoor box, a flammable refrigerant such as propane stays outside the house.

3. 3 Hard

   What was Peter von Rittinger's 1850s heat pump meant to help make?

   Answer: Salt

   Why: The Ebensee saltworks finally made salt with the heat pump method from 1953, almost a century after Rittinger's trials there.

4. 4 Easy

   Where do most heat pumps sold in Germany get their heat?

   Answer: Outdoor air

   Why: Ground-source models are the rarer choice: Germany sold about 8,000 of them in 2024, against roughly 178,000 air-source units.

5. 5 Medium

   Where does the refrigerant lose pressure and turn cold again?

   Answer: Expansion valve

   Why: Past the valve the chilled, low-pressure refrigerant enters the evaporator, where it boils and soaks up heat from outside.

6. 6 Hard

   Which gas is the refrigerant in Japan's EcoCute water heaters?

   Answer: Carbon dioxide

   Why: Unlike toxic ammonia or highly flammable propane, carbon dioxide is a refrigerant that does not burn and has low toxicity.