Explanation
OSHA regulation 1910.110 addresses storage and handling of liquefied petroleum gas (LPG). This regulation covers the general requirements for the design, construction, installation, operation, inspection, and maintenance of LPG systems, including containers, piping, valves, fittings, regulators, burners, and appliances.
The regulation also specifies the safety precautions and procedures for the prevention of fire and explosion hazards involving LPG. The regulation applies to all employers who store, handle, or use LPG in their workplaces.References:
OSHA: 1910.110 - Storage and handling of liquefied petroleum gases1
Nebula Safety: Storage & Handling of Liquefied Petroleum Gases (LPGs)2

Explanation
Process safety is the type of process hazard analysis program that addresses the prevention of flammable and hazardous materials released from containment. Process safety is a discipline that focuses on the prevention and control of incidents that have the potentialto cause catastrophic consequences involving fire, explosion, or toxic release. Process safety involves the application of engineering and management principles, criteria, and techniques to identify, understand, and control process hazards. Process safety covers many aspects of a process, such as design, operation, maintenance, inspection, testing, and emergency response.
References: Process hazard analysis - Wikipedia1; What does the OSHA standard, - Occupational Safety and Health Administration2; Fire Protection Handbook, 20th Edition, Volume 1, Chapter 8, Section 8.3.13.

Explanation
Potassium bicarbonate is a dry chemical agent that is considered to be twice as effective as sodium bicarbonate in fire suppression, especially for Class B fires involving flammable liquids and gases. This is because potassium bicarbonate has a higher melting point and a lower decomposition temperature than sodium bicarbonate, which allows it to form a more stable and insulating layer on the burning surface.Potassium bicarbonate also has a lower pH and a higher specific gravity than sodium bicarbonate, which enhances its penetration and dispersion abilities123.References:Dry Chemical Agents - Purple-K Powder is Purple - Chemguard;Evaluation of Dry Chemical Fire Extinguishing Standards - NFPA;Potassium bicarbonate - Wikipedia.

Explanation
According to the web search results, NFPA 70, National Electrical Code (NEC), is the NFPA standard that governs wiring of a fire alarm system. NFPA 70 covers the general requirements for the design, installation, and inspection of electrical wiring and equipment, including fire alarm circuits and devices. NFPA 70 does not cover the performance of a fire alarm system, which is addressed by NFPA 72, National Fire Alarm and Signaling Code. NFPA 72 covers the application, installation, location, performance, inspection, testing, and maintenance of fire alarm systems and their components. NFPA 73, NFPA 75, and NFPA 76 are other NFPA standards that are related to fire alarm systems, but they do not specifically govern wiring. NFPA 73 covers the electrical inspection of existing dwellings. NFPA 75 covers the protection of information technology equipment. NFPA 76 covers the fire protection of telecommunications facilities.References:
NFPA 72 FAQs1
National Fire Alarm and Signaling Code - NFPA2
TECHNICAL SERVICES DEPARTMENT BULLETIN - NEMA3

Explanation
The coefficient of discharge of a fire hydrant when the outlet is smooth and well-rounded is 0.90. This is the highest coefficient given by NFPA 291 for fire hydrant outlets, and it means that the stream is almost as large as the outlet diameter. The coefficient of discharge is a factor that accounts for the difference between the actual flow and the theoretical flow from an orifice, based on the shape and condition of the outlet1. A lower coefficient means that the stream is more restricted and has a smaller cross-sectional area than the outlet. NFPA 291 provides three coefficients for fire hydrant outlets, depending on how the outlet projects into the barrel: 0.90 for smooth and well-rounded outlets, 0.80 for outlets with a hexagonal or square projection, and 0.70 for outlets with a long projection or adamaged edge2. The coefficient of discharge is used to calculate the flow rate from the pitot pressure measured at the centerline of the stream3. References:
Fire Fighting Foams - Chemguard
Guide to Hydrant Flow Testing | WSRB
New Fire Hydrant Flow Test Charts (PDF) - MeyerFire