Refrigerant Piping Techniques 3-2

What is the primary goal of maintaining proper refrigerant feed to the evaporators?

• To enhance compressor noise

• To reduce energy consumption

• To ensure correct refrigerant quantity

• To minimize installation costs

What is the recommended oil return pitch for a horizontal line?

• 3/4" per 10 ft

• 1/2" per 10 ft

• 1" per 10 ft

• 1/4" per 10 ft

What is the minimum velocity required to maintain refrigerant flow in a vertical suction riser?

• 1000 fpm

• 1500 fpm

• 2000 fpm

• 2500 fpm

What is the purpose of an inverted trap in a suction riser?

• To reduce noise levels

• To prevent oil and refrigerant from flowing back

• To increase refrigerant pressure

• To enhance heat transfer

In a double suction riser, what is the purpose of the smaller line?

• To manage part load conditions

• To reduce oil return

• To handle full load capacity

• To increase pressure drop

What is the function of multiple evaporator traps?

• To increase pressure drop

• To eliminate compressor cycling

• To reduce refrigerant flow

• To maintain proper oil return

What is the main concern with the discharge riser?

• Pressure drop

• Noise pulsations

• High temperature

• Excessive oil return

What does a condenser inverted trap prevent?

• Noise generation

• Pressure loss

• Refrigerant from flowing back

• Oil from leaking

What is the purpose of valve equalizer lines?

• To enhance oil return

• To increase refrigerant flow

• To sense evaporator outlet pressure

• To reduce pressure drop

What is the effect of altitude on liquid line pressure?

• No effect

• Eliminates pressure drop

• Increases pressure loss

• Decreases pressure gain