EPA 608 Type III

If EPA regulations change after a technician has been certified...

• the technician will have been grandfathered into the new changes

• the changes will only affect technicians who have not yet been certified

• it is the technicians responsibility to comply with any future changes

• the changes will only affect technicians certified after 2020

Why is it easier to have air enter gaskets and fittings on a low pressure chiller than on a high pressure chiller

• because air is attracted more to low pressure refrigerants than it is to high pressure refrigerants.

• because a low pressure system operates in a vacuum

• because low pressure systems use centrifugal compressors

• because low pressure systems use gaskets that are semi-permeable

Rupture disks on low pressure systems rupture at ____ PSIG

• 10

• 15

• 20

• 25

How can I easily leak test a low pressure chiller

• connect your gauges and add 15 PSIG of nitrogen and see if if holds pressure without dropping

• connect gauges and add a trace amount of refrigerant and increase the pressure using nitrogen to 150 PSIG

• run warm water through the coils till the pressure is up to 10 PSIG

• recover all of the refrigerant then pull a vacuum down to 500 microns and see if it holds

Since water is often present in the chilled water pump and water tubing of low pressure chillers, the circulating pump should...

• be turned off during recovery

• should be running during recovery

• should be unbolted and removed during recovery

• have anti-freeze added during recovery

If a sight glass or viewing glass is used on the system and it becomes obscured with ice, it can be cleared with

• an ice pick

• with liquid refrigerant

• an ice scrapper from your service truck

• isopropyl alcohol spray

Corrective action must be taken on an appliance with a full charge of _____ lbs. or more, when a leak exceeds the applicable trigger rate over a 12 month period.

• 50

• 100

• 350

• 500

Owners must identify and repair leaks that exceed acceptable levels within _____ days of when the refrigerant is added.

• 10

• 20

• 30

• 40

Once the technician has reached the required level of vacuum when evacuating a system, they should wait a few minutes and monitor the system. If the pressure rises, indicating that there is _________ in the system, recovery must be repeated

• nitrogen

• refrigerant

• ozone

• non-condensables

To protect from over pressurization, low pressure chillers typically use a rupture disk or a PRV mounted on the

• condenser

• compressor

• metering device

• evaporator