An undersized valve may cause:
A) Hunting. B) Trickling. C) Cavitation. D) Cycling.
Question 2
Liquid floodback commonly occurs on air-source heat pumps:
A) When the defrost cycle is terminated and the cycle reverses.
B) When the heat pump is operated in cooling with a low charge.
C) When the liquid filter drier is stopped up.
D) When the heat pump is operated in heating on a warm day.