NSC Building Codes & Standards 3

Question 1

What does NFPA 505 specifically regulate regarding forklifts?

Accepted Answer

Powered industrial truck types permitted in various hazardous locations

Answer

NFPA 505 (Fire Safety Standard for Powered Industrial Trucks) classifies truck types (E, ES, EE, EX, G, GS, LP, LPS, D, DS, DY, EE, EX) and specifies where each may be used based on hazardous location class.

Question 2

Which NEC article defines Class I, Class II, and Class III hazardous locations that directly determine allowable forklift types in a facility?

Accepted Answer

Article 500

Answer

NEC Article 500 classifies hazardous locations by the type of flammable material present (gases, dusts, fibers), which NFPA 505 and OSHA use to restrict forklift types.

Question 3

In a Class I, Division 1 location, which forklift type designation is required per NFPA 505?

Accepted Answer

Type EX (explosion-proof electric)

Answer

Class I, Division 1 locations with flammable gas concentrations require EX (explosion-proof) electric forklifts that meet the most stringent ignition-prevention standards.

Question 4

Under OSHA 1910.178(b), when must a forklift's nameplate capacity be reduced?

Accepted Answer

When attachments are added that affect load center or stability

Answer

Attachments change the load center distance and stability, so OSHA 1910.178(b) requires the manufacturer-rated capacity to be derated accordingly.

Question 5

According to building code requirements, exit aisles in a warehouse where forklifts operate must be at least how wide?

Accepted Answer

44 inches

Answer

The IBC and OSHA require egress paths to be at least 44 inches wide in areas where forklifts operate to allow safe pedestrian exit separate from forklift travel lanes.

NSC Practice Test

NSC Practice Test

NSC Building Codes & Standards 3