Core/6

Which one of the following is an HCFC refrigerant?

• R-11

• R-22

• R-113

• R-410

When will the ban on the production or importing of any HCFC refrigerant take effect?

• 2017

• 2018

• 2020

• 2024

2024 Many refillable cylinders have which of the following attachments to automatically shut off the system when the storage tank level exceeds the 80% full?

• International magnetic-reed float valves

• Electronic shut-off device

• Either

What explains the purpose of recovery?

• To prevent stratospheric ozone depletion

• To provide adequate supplies for service after production bans

• To present venting into the atmosphere

• All options are correct.

What isthe range of calibration of the high pressure of gauge manifold?

• 0 to 100 psi

• 0 to 200 psi

• 0 to 500 psi

• 0 to 1000 psi

In the evacuation system, vacuum lines (hoses) should be equal to or larger than the pump intake connection

• True

• False

The most effective method for checking small leaks uses a halide torch.

• True

• False

The refrigerant recovery rate will be ______ than the smaller the refrigerant system size.

• Slower

• Faster

Only cylinders designated as “refillable” by the _____can be used for refrigerant recovery.

• Department of Transportation (DOT)

• EPA

• Clean Air Act (CAA)

• ASHRAE

UV radiation can cause which of the following: 1) Suppression of the immune system 2) Increase in skin cancers and cataracts?

• Option (1)

• Option (2)

• Both options (1) and (2)

• Neither option (1) and (2)