Question

1. to purchase r - 1234yf refrigerant for mvac service, a person must: 3 point

use sae approved j - 1234yf service equipment
have received formal training in a/c system diagnosis and repair
have a valid epa - approved section 609 credential
have received formal training on high - voltage electrical safety

1. which of the following refrigerants is listed as unacceptable under snap 4 poir for all newly manufactured vehicles as of the 2026 model year (my)?

hfc - 134a (r - 134a)
r - 401c
hfc - 152a

Explanation:

• Question 28: According to regulations, to purchase R - 1234yf refrigerant for MVAC service, having a valid EPA - approved Section 609 credential is a requirement. This credential is related to the proper handling of refrigerants in motor vehicle air - conditioning systems.
• Question 29: As of the 2026 Model Year (MY), HFC - 134a (R - 134a) is listed as unacceptable under SNAP for all newly manufactured vehicles. This is due to its relatively high global warming potential compared to more environmentally friendly alternatives.

Answer:

1. Have a valid EPA - approved Section 609 credential
2. HFC - 134a (R - 134a)