ASE 609 review 2-5-21

The ozone layer filters out most of the sun's harmful:

• infrared radiation

• ultraviolet radiation

• gamma radiation

• alpha radiation

The reduction of ozone in the stratosphere could cause:

• an increase in skin cancer and eye cataracts

• an increase in plant life growth

• an increase in the earth's polar ice

• an increase in marine life growth

Technician A says that sunlight striking CFC molecules can cause chlorine to be released.

Tech B says that chlorine atoms react with ozone to produce chlorine monoxide.

Who is right?

• A only

• B only

• Both A and B

• Neither A nor B

R-1234YF has a global warming potential (GWP) of:

• 1

• 4

• 124

• 1430

The recovery process on an R-12 or R-134a AC system should continue until a stable vacuum is held by the system for:

• 1 minute

• 2 minutes

• 4 minutes

• 5 minutes

A recycled refrigerant container has been checked and found to be above the given pressure limit for the ambient temperature. Technician A says that the refrigerant container should be placed in a cooler storage area before use. Technician B says that the vapor in the container should be slowly vented into a refrigerant handling unit.

• A only

• B only

• Both A and B

• Neither A nor B

R-134a refrigerant must berecycled to meet which of these purity standards?

• J2788

• DOT-4BA

• J1991.

• J2099

If the required charge level of refrigerant for an MVAC system is 40 ounces, which of these is the correct charge level measured in pounds?

• 1.751b (794g)

• 2.50 lb (1.13 kg)

• 3·75lb (1.70kg)

• 4.501b (2.04 kg)

Technician A says that recovery/recycling/recharging equipment for R-1234yf refrigerant requires integration with a refrigerant identifier. Technician B says that recovery/recycling/recharging . equipment for R-1234yf refrigerant uses a 17mm O.D.quick coupler on the low-side service hose.

• A only

• B only

• Both A and B

• Neither A nor B

Which of these identifies a cylinder of R-1234yf refrigerant?

• White

• Gray

• Light blue

• White with red band