5/1 NFPA70E Final Exam 2023 With 100% Correct Answers

NFPA 70E, Standard for Electrical Safety in the Workplace, consists of ? chapters; 17 informative annexes; the Foreword to NFPA 70E; and Article 90, Introduction. Chapter 1 is divided into ? articles. - correct answer3/5 The appointment of the NFPA 70E Committee was announced on January 7, ? , and was formed to assist ? in preparing electrical safety standards that would serve its requirements. - correct answer1976/OSHA The 1995 edition of NFPA 70E included the concepts of ? and the establishment of an arc. The 2000 edition continued to focus on establishment of flash protection boundaries, the use of personal protective equipment, and ? to assist the user in applying appropriate protective clothing and personal protective equipment for common tasks. - correct answerLimits of Approach/Charts The 2004 edition of NFPA 70E introduced the requirements of ? . The 2018 edition ? all previous editions. - correct answerThe energized electrical work permit / supersedes NFPA 70E Chapter 1 applies generally to electrical safety in the workplace. Chapter 2 addresses safety-related ? requirements. Chapter 3 ? Chapter 1 with safety requirements for special equipment. - correct answermaintenance / supplements or modifies Explanatory material is included in the form of informational notes, which are not enforceable as requirements. Brackets containing section references to another NFPA document are for informational purposes only and are provided as a guide to indicate the source of the extracted text. - correct answerTrue An arc flash hazard is defined in Article 100 as a source of possible injury or damage to health associated with the release of energy caused by an electric arc. Informational Note No. 1 indicates that the likelihood of occurrence of an arc flash incident increases when energized electrical conductors or circuit parts are exposed or when they are within equipment in a(n) ? condition, provided a person is interacting with the equipment in such a manner that could cause an electric arc. An arc flash incident is not likely to occur under normal operating conditions when enclosed energized equipment has been properly installed and ? - correct answerguarded or enclosed / maintained Arc rating is defined in Article 100, in part, as the value attributed to materials that describes their performance with exposure to an electrical arc discharge and is expressed ? . Informational Note No. 1 states, in part, that arc-rated clothing or equipment has been tested for exposure to an electric arc and that flame-resistant (FR) clothing without an arc rating ? been tested for exposure to an electric arc - correct answerin cal/cm2 / has not ATPV is defined in ASTM F1959/F1959M as the incident energy (cal/cm2) on a material or a multilayer system of materials that results in a ? probability that sufficient heat transfer through the tested specimen is predicted to cause the onset of a second degree skin burn injury based on the Stoll curve. EBT is defined in ASTM F 1959-06 as the incident energy (cal/cm2) on a material or a material system that results in a ? probability of break open. - correct answer50% / 50% The Informational Note to the definition of arc flash boundary states that, according to the Stoll skin burn injury model, the onset of a second degree burn on unprotected skin is likely to occur at an exposure of ? for one second. - correct answer1.2 cal/cm2 An approach limit at a distance from an exposed energized electrical conductor or circuit part within which a shock hazard exists - correct answerLimited Approach Boundary An approach limit at a distance from an exposed energized electrical conductor or circuit part within which there is an increased likelihood of electric shock, due to electrical arc-over combined with inadvertent movement - correct answerRestricted Approach Boundary When an arc flash hazard exists, an approach limit from an arc source at which incident energy equals 1.2 cal/cm2 (5 J/cm2) - correct answerArc-Flash Boundary An electrical hazard is defined as a dangerous condition such that contact or ? can result in electric shock, arc flash burn, thermal burn, or ? . - correct answerequipment failure / arc blast injury Incident energy is defined as the amount of thermal energy impressed on a surface, a certain distance from the source, generated during an electrical arc event. Incident energy is typically expressed in ? - correct answercalories per centimeter squared (cal/cm2) A qualified person is defined as one who has demonstrated skills and knowledge related to the construction and ? of electrical equipment and installations, and has received safety training to ? the hazard