EPA 608 Practice Test

Disposable cylinders must be:

Discarded.

After the installation of any type of system, the unit should first be:

Pressurized with an inert gas and leak checked.

Which HC refrigerant is allowed for use in new domestic small appliances?

R-600a

Which of the following best describes the refrigerant recovery process from an R-123 system?

Start with liquid removal and then switch over to vapor recovery.

Recovery equipment must be;

certified by an EPA - approved testing laboratory

When a system is in deep vacuum, you should never:

energize the compressor.

A high-pressure appliance containing 200 lbs. of an HCFC or HFC refrigerant must be evacuated (recovered) to a level of:

0 inches of vacuum

A high-pressure appliance containing 210 lbs. of R-407c refrigerant must be evacuated (recovered) to a level of;

10 inches of vacuum

When removing oil from a low‐pressure system, a temperature of what must be attained?

130 degrees F.

The EPA-required evacuation level for recovery or recycling equipment used on low-pressure systems is:

25 mm of Hg absolute.

Leaks must be repaired on industrial process and refrigeration units with a 50- pound charge or greater when the annualized leak rate reaches _____ or more

30%

When charging a low-pressure system, refrigerant should be introduced to the system as a vapor to raise the system's saturation temperature to a minimum of;

36 degrees.

The standard for machine room safety is:

ASHRAE 15

A small appliance is defined by the EPA as:

Appliances manufactured, charged, and hermetically sealed in a factory that contain 5 lbs. or less of refrigerant.

Before shipping any used refrigerant cylinders, what standards should be checked?

Department of transportation

Corp loss, eye disease and skin cancer have been attributed to:

Depletion of Stratospheric ozone

Proper recovery techniques begin with the use of appropriate recovery equipment that has been certified by:

EPA approved laboratory

A refrigerant cylinder designed to hold recovered refrigerant has a:

Grey body and yellow top

The EPA requirement for repairing leaks on small appliances states that:

Leaks should be repaired whenever possible

What type of equipment can be worked on with Type III certification?

Low-pressure

After the refrigerant has been recovered, which of the following should be used to flush the system?

Nitrogen

Which of the following refrigerant has a GWP of "1"?

R-1233zd

When using a system-dependent recovery system on an appliance that has an operating compressor, the technician should;

Run the compressor and recover from the high side of the system only.

EAP regulation state that removal of witch component constitutes a "major repair"?

compressor

To repair a chiller operating with R-22, the technician:

must have a Type II certification.

If a leaking appliance with a regulated refrigerant is not going to be repaired it must be:

retrofitted or retried within 12 months

The chlorine in CFCs and HCFCs:

will not dissolve in water

The use and release of CFCs and HCFCs has a far reaching effect on...

The stratosphere

Technicians who perform sealed system service on small appliances must have;

Type 1 or Universal Certification

Water must be circulated through the tubes when evacuating refrigerant in order to prevent:

Water from freezing.