Industrial Refrigeration Systems Quiz Obj 4

What code must industrial refrigeration systems adhere to?

• CSA B52 Mechanical Refrigeration Code

• ISO 9001

• ASME Boiler and Pressure Vessel Code

• NFPA 70

What is a characteristic of Direct Expansion (DX) systems?

• Refrigerant vaporizes before leaving the evaporator

• Requires a pump for operation

• Liquid refrigerant is always present

• Uses only R-134a refrigerant

Which of the following is NOT a configuration of flooded evaporators?

• Gravity feed

• Liquid overfeed

• Pumped overfeed

• Vapor compression

What is the primary refrigerant used in industrial refrigeration?

• Freon

• Ammonia R-717

• R-410A

• R-134a

What is a safety concern when using ammonia as a refrigerant?

• It does not require PPE

• It can cause severe injury at high concentrations

• It is non-carcinogenic

• It is safe to use copper materials

What must be available for technicians working on ammonia systems?

• Standard gloves

• Safety goggles only

• Self-contained breathing apparatus (SCBA)

• Regular face masks

What is the maximum allowed ammonia concentration for safety?

• 100 ppm

• 1000 ppm

• 500 ppm

• 2000 ppm

Which material should NOT be used in ammonia refrigeration systems?

• Aluminum

• Copper

• Stainless steel

• Steel

What is the purpose of overpressure protection?

• To increase system efficiency

• To minimize risks of vessels bursting

• To reduce refrigerant leakage

• To enhance cooling capacity

What is a requirement for Class T machinery rooms?

• Open flames are allowed

• Walls can be made of wood

• Must have one exit door to the outer air

• No ventilation system is needed