ASE 609 Review

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

• ultraviolet radiation

• gamma radiation

• alpha radiation

• infrared radiation

The reduction of ozone in the stratosphere could cause

• an increase in marine life growth

• an increase in the earth's polar ice

• an increase in skin cancer and eye cataracts

• an increase in plant life growth

Technician A says that sunlight striking CFC molecules can cause chlorine to be released. Technician B says that the chlorine atoms react with ozone to produce chlorine monoxide. Who is right?

• Neither A nor B

• A only

• B only

• Both A and B

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

• 1

• 1430

• 4

• 124

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

• 2 minutes

• 1 minute

• 5 minutes

• 4 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. Who is right?

• B only

• A only

• Neither A nor B

• Both A and B

R-134a refrigerant must be recycled to meet which of the purity standards?

• J1991

• J2788

• DOT-4BA

• 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)

• 3.75lb (1.70kg)

• 4.501 b (2.04kg)

• 2.50 lb (1.13kg)

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 hose.

• Neither A nor B

• A only

• Both A and B

• B only

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

• White

• Light blue

• Gray

• White with red band