What would be an indication that the vegetable box back pressure regulator is set too low?

Correct Answer: Option A — Vegetable refrigeration box is holding the correct temperature but the vegetables are dehydrated and frost is observed on the vegetable box evaporator coil back to the back pressure regulator.

A back pressure regulator set too low causes excessive pressure drop and extremely low evaporator temperatures, freezing coil surfaces and excessively drying out humidity, which dehydrates stored vegetables despite maintaining box temperature.