EPA 609 Refrigerant Recovery & Recycling 3

Question 1

After recovering refrigerant and completing repairs, what must be done before recharging the system?

Accepted Answer

Pull a deep vacuum to remove air and moisture

Answer

Immediately recharge with the same amount recovered

Answer

Add new compressor oil to the recovery cylinder

Answer

Test drive the vehicle to check for leaks

Question 2

How long should a vacuum be held on an MVAC system during evacuation?

Accepted Answer

At least 30 minutes

Answer

At least 30 seconds

Answer

At least 5 minutes

Answer

Until the gauge reads 0 psi

Question 3

What does a 'decay test' after evacuation check for?

Accepted Answer

Whether the system holds vacuum, indicating it is leak-free before recharging

Answer

Whether the refrigerant has been fully recovered

Answer

The correct oil viscosity for the compressor

Answer

Refrigerant purity level

Question 4

When recharging an MVAC system by weight, what is the most accurate method?

Accepted Answer

Using a calibrated electronic scale to measure the exact specified charge weight

Answer

Using the sight glass to estimate the correct charge

Answer

Charging until low-side pressure reaches 30 psi

Answer

Adding refrigerant until the high side reaches 200 psi

Question 5

Where can technicians find the correct refrigerant charge amount for a specific vehicle?

Accepted Answer

On the vehicle's A/C system specification label under the hood or in the service manual

Answer

On the recovery machine's default setting

Answer

By looking up the model year in a refrigerant guide

Answer

On the refrigerant cylinder label

Question 6

Refrigerant recycled on-site using SAE J2788 equipment may be recharged into:

Accepted Answer

Only the same vehicle from which it was recovered

Answer

Any vehicle of the same make and model

Answer

Any vehicle requiring the same refrigerant type

Answer

Only new vehicles under manufacturer warranty