2. Thermodynamics

Refrigeration Cycles — Quiz

Test your understanding of refrigeration cycles with 5 practice questions.

Practice Questions

Question 1

In a single-effect absorption refrigeration cycle, what is the primary function of the solution heat exchanger?

Question 2

A vapor-compression cycle operates with an evaporator temperature of -10 °C and a condenser temperature of 40 °C. If the actual COP is 3.0, what is its exergetic efficiency? Use $COP_{Carnot} = \frac{T_L}{T_H - T_L}$.

Question 3

Which expansion device modulates refrigerant flow to maintain a nearly constant superheat at the evaporator outlet?

Question 4

Which refrigerant has zero ozone depletion potential and a global warming potential near unity but operates in transcritical cycles due to its low critical temperature?

Question 5

What effect does subcooling the liquid refrigerant at the condenser outlet by a temperature $\Delta T$ have on a vapor-compression refrigeration cycle (all else equal)?