Exam 45: Domestic Refrigerators and Freezers

What two functions does the evaporator of a domestic refrigerator perform?

The operating pressure of the condenser in a domestic refrigerator will increase as the temperature of the room ____________________.

A household refrigerator may have more than one evaporator coil.

Why should sharp objects not be used to chip away ice from an evaporator?

How is the crisper maintained slightly cooler than the main storage area of the refrigerator?

The typical box temperature for a stand-alone freezer is about ____________________ºF.

The defrost timer motor operates independently of the compressor motor.

When a suction line filter/drier is added to the refrigerant circuit, the additional amount of refrigerant required is ignored.

The heaters located near the refrigerator door to keep the cabinet from sweating are called the ____ heaters.

The condensate from the evaporator coil is disposed of by evaporation using heat from the discharge line or ____.

The temperature of the fresh food compartment of a domestic refrigerator is ____.

What are the two reasons for fastening the capillary tube to the suction line?

When installing a line tap valve on the high-pressure side of the system, it is best to install it on the compressor process tube.

A current magnetic relay is often used to assist in the starting of the compressor, but most new appliances use a(n) ____________________ device.

One sure-fire way to determine if the system is operating with less than a full charge of refrigerant is to evaluate the ____.

An accumulator at the outlet of the evaporator is there to ____.

When performing a repair on an aluminum evaporator, the best solution is to use an acetylene torch in conjunction with phos-copper brazing rods.

Explain what is needed to properly replace a compressor in a domestic refrigerator or freezer, since visual identification of lines may be difficult.

The capillary tube metering device on a domestic refrigerator is generally fastened to the ____ for heat exchange.

To repair a leak in an aluminum evaporator a special epoxy product may be applied to the hole while the unit is in a slight ____________________.