02. ACR-104 UNIT 21 REVIEW QUESTIONS

The sensible heat that is added to a saturated vapor after all of the liquid

has boiled away is referred to as _______.

• radiant heat

• superheat

• real heat

• thermal heat

Refrigerant in the evaporator

• changes from vapor to liquid.

• changes from liquid to vapor.

• stays in the vapor state.

• stays in the liquid state.

A refrigerant system’s evaporator typically runs about______degrees of superheat.

• 16°F-20°F

• 10°F-14°F

• 8°F-12°F

• 8°F-15°F

A low evaporator superheat indicates

• undercharge.

• system restriction.

• overcharge.

• dirt buildup.

Flooded evaporators use a(n)_______type of expansion device.

• even-flow

• low-side float

• high-side float

When an evaporator experiences a heat-load increase, the suction pressure

• remains constant.

• decreases.

• varies up and down.

• increases.

A medium-temperature refrigeration box operates within what temperature range?

• 28°F to 40°F

• 40°F to 60°F

• 0°F to 220°F

• 0°F to 50°F