Type 3 Flashcard

Front

A technician servicing low-pressure appliances must be certified under

Back

Type III cert. Of section 608

Front

When recharging a low-pressure system, you should allow enough ____________ to enter the system until the refrigerant saturation temperature increases to _______ degrees before introducing liquid refrigerant.

Back

vapor / 32

Front

EPA regulations require that all chillers containing 50 or more pounds of ozone-depleting refrigerant that are used for comfort cooling be repaired when the leak rate exceeds___________percent of the charge per year.

Back

10

Front

Charging liquid R-245f refrigerant into a low-pressure refrigeration system under ___ mercury vacuum can cause the system water to freeze.

Back

18"

Front

The leak rate threshold for comfort cooling appliances with a full charge of 50 pounds or more of HCFC refrigerant is _________%.

Back

10

Front

The purpose of a hydrostatic tube test is to:

Back

determine if a tube is leaking

Front

In low pressure chillers, the most frequent route of moisture entry is: air leak from gasketed areas or fittings, around compressor sweat fittings, above the condenser inlet, either a or b

Back

air leak from gasketed areas or fittings

Front

On a centrifugal system chiller, the rupture disc connects to the: condenser, evaporator, compressor, metering device

Back

evaporator

Front

Removal of refrigerant oil at high temperatures (_____F) will result in less refrigerant being contained in the oil.

Back

130

Front

The ________is particularly susceptible to leaks in low-pressure chillers with open-drive type compressors.

Back

shaft seal