EPA 608 Type III

If the EPA regulations change after a technician has been certified

• the technician will be "grandfathered" into the new changes

• this will only affect technicians who have not yet been certified

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

• this will only affect technicians who have been certified after January 1, 2000

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

• because air is attracted to R-11 and R-123 more than to R-12 and R-22

• because a low pressure system operates in a vacuum

• because low pressure systems often use a centrifugal compressor

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

At what pressure does a rupture disk open on a low pressure system?

• 10 psig

• 15 psig

• 20 psig

• 25 psig

What is the easiest way to leak test a low pressure system?

• connect your gauges and add 15 psig of nitrogen

• connect your gauges and add 150 psig of nitrogen with a trace amount of R-22

• Add warm water over the coils until you reach 10 psig

• recover all refrigerant, then pull the system down to a 500 micron vacuum and see if the vacuum holds

Why is it important not to exceed 10 psig when leak testing a low pressure system?

• Because the relief valve on the reciever would blow

• Because the condenser test pressure is 10 psig max.

• because the rupture disc on the evaporator could fail

• because the shaft seals cannot withstand more than 10 psig without leaking

When using an electronic leak detector, where is a water box leak tested after the water has been removed?

• at the drain valve

• at the rupture disk

• at the inlet valve

• at the shaft seal

What is used when leak testing a water tube on a low pressure chiller?

• a hydrometer

• a psychrometer

• a manometer

• a hydrostatic tube test kit

The EPA requires that all comfort cooling systems with more than 50 lb. of refrigerant be repaired when the annual leak rate exceeds

• 50%

• 30%

• 25%

• 15%

Tags

NGSS.HS-ESS3-4

The EPA requires that all commercial and industrial process refrigeration systems with more that 50 lb. of refrigerant be repaired when leak rates exceed

• 15%

• 25%

• 35%

• 50%

What pressure is a high-pressure cut-out set for on a recovery system that is used on low-pressure refrigeration systems?

• 10 psig

• 15 psig

• 20 psig

• 25 psig