In a high-temperature refrigeration unit, the boiling point of the refrigerant in the coil is normally ____ lower than the cabinet temperature.

A. 10°F to 20°F
B. 25°F to 35°F
C. 35°F to 46°F
D. 5°F to 15°F


Answer: A

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a. 1/2? b. 1? c. 1-1/2? d. 2?

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Technician A says that headers do not improve performance at low rpm unless they are specifically tuned for low rpm use. Technician B says that longer header pipes tend to improve low rpm performance. Who is right?

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