#2 EPA 608 Type III

Where would you place a leak detector probe to check gas leaks into the water box with water removed?

• At the rupture disc seal.

• Around the vent valve.

• Around a test plug.

• In the drain valve opening.

Which of the following actions would always be considered "major" under EPA's regulations?

• Replacement of an evaporator coil

• Replacement of a filter-drier

• Replacement of a switch

• Replacement of a purge unit

During evacuation of a system containing large amounts of moisture, it may be necessary to prevent freezing by increasing pressure using a gas such as;

• air.

• carbon dioxide.

• R-134a.

• nitrogen.

Which of the following always falls under the EPA definition for "major maintenance, service, or repair?"

• Replacing an oil filter

• Replacing an expansion valve

• Replacing a compressor

• Replacing an accumulator

What should be used to remove ice from sight glasses or viewing glasses?

• A torch

• Water

• A screwdriver

• lsopropyl alcohol

Starting in 2019, what is the leak rate threshold for comfort cooling appliances with a full charge of 50 or more pounds?

• 5%

• 10%

• 20%

• 30%

Charged low-pressure refrigeration machines may be most efficiently leak checked by;

• adding dry nitrogen to increase the pressure.

• adding refrigerant leak detection tracer dye.

• adding heat with circulated hot water or heating blankets.

• operating the purge system to see how much air comes out.

Why do chillers using low-pressure refrigerants require purge units?

• These systems require the removal of contaminated refrigerant.

• These systems operate below atmospheric pressure.

• Purge units remove refrigerant from the oil sump.

• These systems require the removal of condensables from the chiller.

When must the leak rate of an appliance be calculated?

• When topping off or recharging a system due to a loss of charge.

• Following a retrofit with a new refrigerant.

• Following the installation of a new appliance.

• When adding refrigerant for a seasonal variance.

Which of the following CANNOT be used as a reason to extend the appliance leak repair deadlines?

• Requirements of federal, state or local regulations make the repair within 30 days impossible.

• The appliance is located in an area that is subject to radiological contamination.

• Necessary repair parts are unavailable.

• A certified service technician is not available.