Question

REFILLABLE cylinders used to transport recovered refigerants MUST __________.

1) DOT approved
2) properly labeled and tagged
3) hydrostatically tested every 5 years
4) of the above

Answer 1

Refillable cylinders for transporting recovered refrigerants are required to meet all listed conditions: DOT approval, proper labeling and tagging, and hydrostatic testing every 5 years.

Step-by-step explanation:

Refillable cylinders used to transport recovered refrigerants must be DOT approved, properly labeled and tagged, and hydrostatically tested every 5 years.

The regulations for transportation of hazardous materials, such as refrigerants, are strict, and adherence to these guidelines is mandatory to ensure safety and compliance. Therefore, the correct answer to the question is option 4, "all of the above".