ASE 609 review 2-5-21

Front

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

Back

ultraviolet radiation

Front

The reduction of ozone in the stratosphere could cause:

Back

an increase in skin cancer and eye cataracts

Front

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

Back

Both A and B

Front

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

Back

4

Front

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

Back

2 minutes

Front

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.

Back

Technician B's statement is correct.

Front

R-134a refrigerant must be recycled to meet which of these purity standards? J2788, DOT-4BA, J1991, J2099

Back

J2099

Front

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)

Back

2.50 lb (1.13 kg)

Front

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.

Back

A only

Front

Which of these identifies a cylinder of R-1234yf refrigerant? White, Gray, Light blue, White with red band

Back

White with red band