Refrigeration System Quiz

What are the two broadest categories of special HVACR system components?

• Controls and accessories

• Filters and compressors

• Evaporators and condensers

• Thermostats and fans

What is the purpose of an oil pressure safety control?

• To prevent compressor damage

• To increase refrigerant levels

• To enhance system cooling

• To reduce energy consumption

What is the set suction pressure for the evaporator pressure regulator for R-134a?

• No less than 29.5 psig

• No more than 29.5 psig

• Exactly 30 psig

• Exactly 28 psig

What happens to the EEPR valve when the discharge air temperature drops to the valve's set point?

• It fully opens

• It starts to throttle closed

• It remains unchanged

• It shuts off completely

What happens when the CPR valve is properly adjusted?

• The compressor will overheat

• The valve will remain closed

• The valve will be fully open and the outlet pressure will equal the inlet pressure

• The refrigerant will freeze

What is the role of the screen layer in a helical oil separator?

• Acts as an oil stripping and draining medium

• Increases the temperature of the oil

• Compresses the refrigerant

• Cools the oil

What is the primary function of a crankcase heater in a refrigeration system?

• To increase the temperature of the refrigerant

• To keep the oil in the compressor's crankcase at a temperature higher than the coldest part of the system

• To cool down the compressor

• To reduce the pressure in the crankcase

What is the role of low-ambient controls in refrigeration systems?

• To increase the system's cooling capacity

• To operate year-round and manage head pressure

• To reduce system noise

• To enhance energy efficiency

What is a common problem with compressor start-ups in cold ambient conditions?

• Increased system efficiency

• Refrigerant migration

• Reduced cooling capacity

• Enhanced energy efficiency

What is a potential issue with compressor start-ups with liquid refrigerant in the crankcase?

• Increased system efficiency

• Reduced cooling capacity

• Liquid refrigerant floodback

• Enhanced energy efficiency