Explanation

Fire pump
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Typical fire pump drivers reach maximum brake horsepower (BHP) between 140% and 170% of rated capacity, depending on the type and size of the pump. This means that the driver must be able to provide enough power to operate the pump at its peak efficiency point, which is usually beyond the rated capacity. The rated capacity is the flow rate at which the pump is designed to deliver a certain pressure, as specified by NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protection. The maximum BHP is the highest power output required by the pump at any point on its performancecurve. The driver must be sized to match the maximum BHP of the pump, with some allowance for service factor and safety margin.References
:Understanding the Basics of Fire Pumps | Pumps & Systems;How are Engines and Motors Sized for Fire Pumps?; NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protection, 2023 Edition, Chapter 4, Section 4.7.

Explanation
The answer is A. According to NFPA 30: Flammable and Combustible Liquids Code, 2021 Edition, Chapter
14, lockers used for the storage of flammable or combustible liquids shall not exceed 1500 ft2 (139 m2) gross floor area. This limit applies to both indoor and outdoor lockers.Lockers are defined as self-contained, prefabricated structures that are designed to store hazardous materials and that are equipped with fire protection features, such as fire-resistance-rated walls, doors, and roofs, automatic sprinklers, spill containment, and ventilation12

Explanation
According to the CDC, exposure to hydrogen fluoride at concentrations of less than 50 ppm for two minutes may cause mild eye and upper respiratory tract irritation. The severity of the effects depends on the concentration, duration, and route of exposure, as well as the individual's susceptibility. Higher concentrations or longer exposures can cause more serious health effects, such as pulmonary edema, skin burns, or systemic toxicity.References:CDC | Facts About Hydrogen Fluoride (Hydrofluoric Acid); [Hydrogen Fluoride (HF) | Medical Management Guidelines | Toxic Substance Portal | ATSDR]2; [Hydrogen Fluoride and Hydrofluoric Acid (HF) - GOV.UK]3.