Valve Design and Functions Quiz pt2

What is the purpose of an evaporator pressure regulating (EPR) valve?

• To increase compressor amperage

• To divert refrigerant flow

• To maintain minimum evaporator pressure

• To regulate crankcase pressure

What type of valve is a solenoid valve when it is open when electrical power is not applied to the valve's operating coil?

• Direct Acting or Normally Open (NO)

• Reverse Acting or Normally Closed (NC)

• Crankcase Pressure Regulating (CPR) Valve

• Pressure Differential (PD) Valve

What is the function of a crankcase pressure regulating (CPR) valve?

• To regulate evaporator pressure

• To divert refrigerant flow

• To increase compressor amperage

• To maintain maximum crankcase pressure at the entrance to the compressor

What is the basic function of a pressure differential (PD) valve?

• To regulate crankcase pressure

• To start and stop refrigerant flow

• To maintain minimum evaporator pressure

• To provide a pressure difference between two points in a refrigeration system

What is the main difference between manual and automatic valves?

• Manual valves require human intervention, while automatic valves do not

• Automatic valves require human intervention, while manual valves do not

• Manual valves are used for refrigeration, while automatic valves are used for air conditioning

• Automatic valves are used for refrigeration, while manual valves are used for air conditioning

What is the purpose of a solenoid valve in a refrigeration system?

• To start and stop refrigerant flow

• To regulate crankcase pressure

• To maintain minimum evaporator pressure

• To provide a pressure difference between two points in a refrigeration system

What is the function of a pressure differential (PD) valve?

• To provide a pressure difference between two points in a refrigeration system

• To maintain minimum evaporator pressure

• To regulate crankcase pressure

• To start and stop refrigerant flow

What is the main function of an automatic valve?

• To be used only in refrigeration systems

• To require constant human intervention

• To be used only in air conditioning systems

• To operate without human intervention

What is the purpose of a manual valve in a refrigeration system?

• To regulate crankcase pressure

• To maintain minimum evaporator pressure

• To provide a pressure difference between two points in a refrigeration system

• To stop, start and regulate flow by the physical action of turning a stem

What is the function of a crankcase pressure regulating (CPR) valve?

• To maintain maximum crankcase pressure at the entrance to the compressor

• To regulate evaporator pressure

• To increase compressor amperage

• To divert refrigerant flow