NCCER 26403 Questions with correct Answers

NCCER 26403 Questions with correct Answers NEC Article 701 covers the requirements for _. optional standby systems emergency systems storage batteries legally required standby systems legally required standby systems The MOST common method of cooling standby generator sets is . liquid-to-liquid heatexchangers a mounted radiator with an engine-driven fan battery-powered systems compressed air systems a mounted radiator with an engine-driven fan Which of the following commercial loads can be fed from a regular circuit rather than an emergency circuit? Exit lights Computer equipment Fire alarm systems Life safety systems Computer equipment In an AC generator, the field windings are energized by the . rotor exciter armature stator exciter Transfer switches are sized based on . 80% of the generator capacity 125% of the maximum critical load 150% of the emergency load the calculated continuous current the calculated continuous current NEC Article 517 contains . requirements for places of assembly information on transferswitches requirements for health care facilities information on the installation of emergency systems requirements for health care facilities The nominal open circuit voltage of a lead-acid cell is . 1.0V 2.0V 3.0V 4.0V 2.0V Overcharging a lead-acid battery will . destroy the positiveplate increase battery power extend battery life destroy the negative plate destroy the positiveplate Which of the following is TRUE regarding a single-conversion UPS system? It has poor noise isolation from line to load. It provides excellent frequency stability. It supplies AC power directly to critical loads through a series inductor or transformer. It may achieve zero transfer time. It supplies AC power directly to critical loads through a series inductor or transformer. An engine-driven AC generator may be oversized when serving a . farm fire pump HVAC system residence fire pump Systems installed to protect loads such as communications, ventilation, or lighting systems that, when stopped, could create hazards or hamper rescue or fire-fighting operations are known as . legally required standby systems emergency systems life safety systems essential systems legally required standby systems Which of the following can be used to determine battery capacity? Hydrometer Float test Specific gravity calculation Load test Load test A storage battery must supply AT LEAST . 331⁄3% of the system voltage for the total load of circuits supplying legally required standby power 671⁄3% of the system voltage for the total load of circuits supplying legally required standby power 871⁄2% of the system voltage for the total load of circuits supplying legally required standby power 100% of the system voltage for the total load of circuits supplying legally required standby power 871⁄2% of the system voltage for the total load of circuits supplying legally required standby power Each patient bed location in a health care facility MUST be supplied by . one or more branch circuits from the emergency system only one branch circuit from the normal electrical system only two branch circuits from the emergency system only one or more branch circuits from the normal electrical system and one or more from the emergency system one or more branch circuits from the normal electrical system and one or more from the emergency system NEC Article 518 contains . requirements for places of assembly information on transferswitches requirements for health care facilities information on the installation of emergency systems requirements for places of assembly