EPA 608 609 609 3

Question 1

Which refrigerant replaced R-12 in most vehicles built in the mid-1990s and later?

Accepted Answer

R-134a (HFC-134a)

Answer

R-22

Answer

R-404A

Answer

R-507

Question 2

What is the newer low-GWP refrigerant being adopted in modern MVAC systems?

Accepted Answer

R-1234yf (HFO)

Answer

R-410A

Answer

R-32

Answer

R-290

Question 3

Why is it illegal to knowingly vent R-134a from an MVAC system into the atmosphere?

Accepted Answer

It is a potent greenhouse gas prohibited from venting under the Clean Air Act

Answer

It is explosive at room temperature

Answer

It is acutely toxic to humans

Answer

It corrodes recovery equipment

Question 4

Before connecting recovery equipment, why must a technician identify the refrigerant in the system?

Accepted Answer

To avoid cross-contaminating recovery equipment with mixed refrigerants

Answer

To set the cabin temperature

Answer

To determine the vehicle's mileage

Answer

To verify the warranty status

Question 5

What instrument is recommended to confirm the type and purity of refrigerant in a vehicle?

Accepted Answer

A refrigerant identifier

Answer

A multimeter

Answer

A manometer

Answer

A torque wrench

Question 6

Refrigerant containers used to store recovered MVAC refrigerant must be which color or marked for the specific refrigerant?

Accepted Answer

DOT-approved containers labeled for the specific refrigerant

Answer

Any clean steel drum

Answer

Open-top buckets

Answer

Glass jars

Question 7

What happens to a vehicle's R-12 system that is being retrofitted to R-134a?

Accepted Answer

It must use unique service fittings and proper labeling to prevent cross-contamination

Answer

It can use the same fittings as R-12

Answer

It no longer needs recovery equipment

Answer

It can be vented during conversion