RSES Safety Practices & Regulatory Compliance 4

Question 1

What does the DOT classification 'UN 1018' identify?

Accepted Answer

Chlorodifluoromethane (R-22)

Answer

UN 1018 is the DOT identification number for chlorodifluoromethane, commonly known as R-22, a refrigerant regulated under both DOT and EPA rules.

Question 2

A refrigeration system using R-717 (ammonia) requires special consideration because ammonia is classified as:

Accepted Answer

B2L — higher toxicity, lower flammability

Answer

Ammonia (R-717) is classified B2L under ASHRAE 34, indicating higher toxicity (B) and lower flammability with a low burning velocity (2L).

Question 3

Which federal agency regulates the transportation of refrigerant cylinders on public roads?

Accepted Answer

DOT (PHMSA)

Answer

The Department of Transportation's Pipeline and Hazardous Materials Safety Administration (PHMSA) regulates the transportation of refrigerant cylinders as hazardous materials.

Question 4

What action must be taken when a refrigerant cylinder's hydrostatic test date has expired?

Accepted Answer

Remove it from service immediately and send for retesting or disposal

Answer

DOT requires cylinders to be retested at specified intervals; an expired cylinder must be removed from service until retested, or it must be disposed of properly.

Question 5

What is the primary purpose of the EPA's Significant New Alternatives Policy (SNAP) program?

Accepted Answer

To evaluate and regulate substitutes for ozone-depleting substances

Answer

The SNAP program evaluates and lists acceptable and unacceptable substitutes for ozone-depleting substances to protect human health and the environment.

(RSES) Refrigeration Service Engineers Society Certification Practice Test

(RSES) Refrigeration Service Engineers Society Certification Practice Test

RSES Safety Practices & Regulatory Compliance 4