Spray undercoating or spray body lining of vehicles shall be conducted a minimum of what distance from open flames or spark-producing equipment?

Spray undercoating or spray body lining of vehicles shall be conducted a minimum of what distance from open flames or spark-producing equipment?
A . 3 ft (914 mm)
B . 5 ft (1,524 mm)
C . 10 ft (3,048 mm)
D . 20 ft (6,100 mm)

View Answer

Answer: D

Explanation:

The minimum distance required for spray undercoating or spray body lining of vehicles from open flames or spark-producing equipment is specified in NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials.

Spraying operations involving combustible coatings pose a significant fire risk due to flammable vapors, which can ignite from open flames or sparks.

To ensure safety, these operations must be conducted at least 20 feet (6,100 mm) away from ignition sources, as vapors can travel and accumulate in the surrounding air.

3 ft (914 mm) (A) and 5 ft (1,524 mm) (B) are insufficient to prevent ignition.

10 ft (3,048 mm) (C) may be acceptable for certain low-risk operations but does not meet the requirements for vehicle spray applications.

Reference: NFPA 33, Section 9.3: Minimum distance from open flames and spark-producing equipment.