A simple heat pump used for home heating contains four basic components arranged in a loop. According to the source, what are these four components?
AFurnace, thermostat, duct and vent
BBoiler, turbine, generator and condenser
CPiston, cylinder, valve and crankshaft
DCondenser, valve, evaporator and compressor
Answer & Solution
Correct answer: D. Condenser, valve, evaporator and compressor
1. The basic components of a simple heat pump in its heating mode are given as a numbered set of four parts.
2. Those four parts are named directly: the condenser, the expansion valve, the evaporator and the compressor.
3. Furnaces, thermostats, ducts and vents belong to conventional heating systems rather than to the heat pump's own refrigerant loop, ruling out option A.
4. Boilers, turbines and generators belong to the power stations described earlier, and pistons, cylinders and crankshafts belong to the gasoline engine's Otto cycle, so options B and C both borrow components from unrelated devices.
_Source: OpenStax College Physics (CC BY 4.0), Ch 15 "Thermodynamics", section 15.5 Applications of Thermodynamics: Heat Pumps and Refrigerators_
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