ESCO LIGHT COMMERCIAL REFRIGERATION PRACTICE TEST 2026 TESTED QUESTIONS AND CORRECT ANSWERS

ESCO LIGHT COMMERCIAL
REFRIGERATION PRACTICE TEST 2026
TESTED QUESTIONS AND CORRECT
ANSWERS

◉ A hot gas defrost cycle can be initiated by a:
Answer: Timer


◉ When the defrost cycle is terminated, the evaporator fans will:
Answer: Delay coming on.


◉ An off-cycle defrost method is often used on evaporators
operating at a minimum of:
Answer: 35*F


◉ Excessive frost on the evaporator causes:
Answer: Reduced heat transfer.


◉ Automatic pump down systems are used to prevent:
Answer: Migration of refrigerant to the crankcase during of cycles.

, ◉ An automatic pump down system requires a:
Answer: Liquid line solenoid


◉ Short cycling in a pump down system is most likely caused by a
leaking:
Answer: Liquid line solenoid valve.


◉ An evaporator pressure regulator valve (EPR) is a mechanical
control that:
Answer: Limits pressure set point in the evaporator.


◉ The "low-ambient control" is used to control:
Answer: Head pressure.


◉ The crankcase heater is used to prevent:
Answer: Refrigerant migration to the compressor crankcase during
the off cycle


◉ The type of compressor that allows access to the internal
components is the:
Answer: Semi-hermetic


◉ Low ambient temperatures seriously affect: