What NFPA deals with out of service criteria for apparatus?

Answer: A — NFPA 1911

NFPA 1911 is the standard that specifically addresses the inspection, maintenance, and repair of fire apparatus, which includes the criteria for determining when an apparatus is deemed "out of service." This standard establishes guidelines to ensure that fire apparatus remain in safe and effective working condition, helping departments maintain operational readiness and ensuring the safety of personnel and the public. This standard details criteria for assessing the condition of fire apparatus, which includes aspects like mechanical function and overall safety as well as performance capabilities. By adhering to the guidelines set forth in NFPA 1911, fire departments can safeguard against the risks associated with using equipment that may not meet safety standards. Other standards mentioned, such as NFPA 1002, focus on driver/operator certification and training, NFPA 1901 addresses the design and construction of fire apparatus, and NFPA 1021 pertains to fire officer qualifications, but none of them specifically cover the out of service criteria as directly as NFPA 1911 does.