Type 3 Quiz

A technician servicing low- pressure appliances must be certified under

• Type III cert. Of section 608

• Type II cert. Of section 608

• Type I Of section 608

• All of the above

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.

• vapor / 32

• vapor / 36

• liquid / 32

• liquid / 36

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

• 5

• 10

• 15

• 30

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

• 10"

• 25"

• 29"

• 18"

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

• 30

• 20

• 25

• 10

The purpose of a hydrostatic tube test is to:

• determine if a tube has refrigerant in it

• determine if a tube is leaking

• determine if the pressure inside of the tube is less than required

• none of the above

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

On a centrifugal system chiller, the rupture disc connects to the:

• condenser

• evaporator

• compressor

• metering device

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

• 110

• 115

• 120

• 130

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

• condenser inlet

• evaporator outlet

• shaft seal

• Schrader valve core