Comprehensive and Detailed Step-by-Step Explanation:
LP Gas Equipment Regulations:
NFPA 58 (Liquefied Petroleum Gas Code) provides standards for the use, storage, and operation of portable LP gas equipment, including safety requirements for restaurants and other commercial applications.
Why NFPA 58 Applies:
Portable LP gas cooking equipment poses unique hazards due to the flammability of the gas. NFPA 58 ensures proper installation and operation to minimize risks.
Other Options Explained:
Option A (NFPA 52): Applies to natural gas vehicles, not cooking equipment.
Option B (NFPA 54): Covers natural gas fuel systems, not LP gas.
Option D (NFPA 96): Focuses on ventilation and grease removal in cooking systems, not LP gas-specific requirements.
Summary:
Portable LP gas cooking equipment in a restaurant must comply with NFPA 58 for safe operation.

Comprehensive and Detailed Step-by-Step Explanation:
Clear Space Requirements for Fire Hydrants:
According to NFPA 1 (Fire Code), Section 18.5.7.1, a clear space of at least 36 inches (914 mm) must be maintained around the circumference of a fire hydrant.
Why 36 Inches is Required:
Maintaining 36 inches of clear space ensures that fire hydrants are:
Readily accessible for firefighters during emergencies.
Free from obstructions that may hinder operation or connection of hoses.
Other Options Explained:
Option A (24 in): Insufficient clearance; may obstruct hydrant accessibility.
Option C (48 in) and Option D (60 in): More than required; not mandated by NFPA 1.
Summary:
A 36-inch (914 mm) clear space must be maintained around the circumference of a fire hydrant to ensure accessibility and operability.

Comprehensive and Detailed Step-by-Step Explanation:
Storage of Class 2 Oxidizers:
Per NFPA 430 (Code for the Storage of Liquid and Solid Oxidizers), Section 6.3.4, in nonsprinklered retail sales areas open to the public, Class 2 oxidizers must not be stored at heights exceeding 5 feet (1.5 meters).
Why 5 Feet is the Limit:
Limiting the height reduces the risk of spills, accidental damage, and fire spread in a retail environment.
Other Options Explained:
Option A (3 ft): Too restrictive; NFPA allows up to 5 ft.
Option C (6 ft) and Option D (12 ft): Exceed the maximum permitted height for nonsprinklered areas.
Summary:
The maximum height for stored Class 2 oxidizers in a nonsprinklered retail area open to the public is 5 feet (1.5 meters).

Comprehensive and Detailed Step-by-Step Explanation:
Egress Width Calculation:
According to NFPA 101 (Life Safety Code), Section 7.3.3.1, for non-sprinklered occupancies, the required stair width is 0.3 inches per occupant.
Calculation:
Occupancy capacity = 650 people
Required stair width = 0.3in.×650=195inches0.3 \, \text{in.} \times 650 = 195 \, \text{inches}0.3in.×650=195inches.
Other Options Explained:
Option A (130 in): Too small for 650 occupants.
Option C (217 in): Exceeds the requirement.
Option D (455 in): Far exceeds the requirement.
Summary:
The minimum required total stair width for a non-sprinklered hotel with an occupancy capacity of 650 is 195 inches.

The ex officio member of a fire code board of appeals typically represents the Authority Having Jurisdiction (AHJ). According to fire code principles:
The AHJ serves as an advisory member to provide expert guidance on fire codes and regulations but does not have voting authority.
Jurisdiction's legal counsel (B): May assist with legal advice but is not considered an ex officio member.
General public (C): Does not typically fulfill the role of an ex officio member.
Appellant (D): Represents the party challenging a decision, not an ex officio role.
Reference:
NFPA 1, Annex A.1.10: Guidelines for fire code board of appeals and ex officio roles