#6 EPA 608 Type II

A comfort-cooling appliance containing 50 pounds or more of R-22 is found to be leaking beyond the applicable leak rate threshold. Unless granted additional time, how many days do you have to repair the leak and conduct the initial leak verification test?

• 1 days

• 10 days

• 30 days

• 45 days

After a leak repair of a supermarket rack using 3000 lbs of R-22 and a successful initial verification test, when must a follow-up leak verification test be conducted?

• The same day.

• The next day.

• Within 10 days.

• Within 30 days.

Before making a major repair, technicians must evacuate an appliance or component containing more than 200 pounds of R-410A to which of the following levels?

• 0 psig

• 25 mm Hg absolute

• 10 inches of Hg vacuum

• 15 inches of Hg vacuum

During evacuation with large amounts of moisture it may be necessary to increase pressure to counteract freezing with gas such as;

• R-410A.

• R-22.

• Air.

• Nitrogen.

How would you remove moisture from refrigerant in a system?

• Purge the condenser.

• Drain the oil separator.

• Reduce water flow to the condenser.

• Use a filter drier.

Refrigerant has been recovered from an air-conditioning system and held in a refillable cylinder, in order to replace the condenser coil. The refrigerant;

• may be charged back into the system.

• may be sold as is to another equipment owner.

• must be reclaimed.

• must be destroyed.

To determine if the system is leaking more than the allowable rate, the EPA allows the use of which one of the following methods to determine the full charge?

• Use of the calculations based on power consumption, in kWh.

• Use of the calculations based on compressor horsepower

• Use of calculations based on component and pipe sizes.

• Use of the calculations based on the BTU capacity of the system.

What is a deep vacuum usually measured in?

• Psig

• Psia

• Inches of Hg

• Microns

What is a moisture indicating sight glass useful for?

• Determining the type of refrigerant.

• Checking for moisture in refrigerant.

• Providing sub-cooling.

• Determining the type of oil used.

What is the approximate refrigerant pressure in an R-134a refrigerator, when it has been off for a long time and the room temperature has been maintained at 80°F?

• 87 psig

• 158 psig

• 219 psig

• 300 psig