CRST Safety Procedures & Environmental Regulations 2

Question 1

Under EPA Section 608, which refrigerants are classified as Class I ozone-depleting substances?

Accepted Answer

R-11, R-12, and R-113

Answer

Class I ODS include CFCs such as R-11, R-12, and R-113, which have the highest ozone depletion potential.

Question 2

What is the maximum allowable leak rate for comfort cooling equipment containing more than 50 pounds of refrigerant before repair is required?

Accepted Answer

15% per year

Answer

EPA regulations require repair when leak rates exceed 15% of the system charge per year for comfort cooling appliances.

Question 3

Which PPE is most critical when handling liquid refrigerant to prevent cryogenic burns?

Accepted Answer

Insulated cryogenic gloves and face shield

Answer

Cryogenic gloves and a face shield protect against liquid refrigerant contact, which can cause severe frostbite-like burns.

Question 4

A technician discovers a system leaking R-22 at a rate of 25% per year. What is the required response timeline under EPA regulations?

Accepted Answer

Repair within 60 days of discovery

Answer

EPA Section 608 requires that leaking systems exceeding threshold rates be repaired within 30 days, with a possible 60-day extension for complex repairs.

Question 5

What does the OSHA permissible exposure limit (PEL) for ammonia (R-717) in the workplace?

Accepted Answer

50 ppm TWA

Answer

OSHA sets the PEL for ammonia at 50 ppm as an 8-hour time-weighted average.

(CRST) Certified Refrigeration Service Technician Practice Test

(CRST) Certified Refrigeration Service Technician Practice Test

CRST Safety Procedures & Environmental Regulations 2