Question 424Electricity/Electronics - Assistant Engineer70% to pass
According to 46 CFR, Subchapter J (Electrical Engineering), which of the following statements concerning battery installations is correct?
AI Explanation
The correct answer is C.
According to 46 CFR Subchapter J, when power ventilation is required for battery installations, the ventilation system must have blower blades that are non-sparking, and the system must be interlocked with the battery charger to prevent charger operation unless the ventilation fan is running. This ensures that the battery compartment is properly ventilated to prevent the buildup of explosive hydrogen gas.
The other options are incorrect because: A) allowing the ventilation to serve other spaces may not provide adequate ventilation for the battery compartment; B) the regulation requires the ventilation system to be interlocked with the charger, not just the charger and ventilation system to operate simultaneously; and D) the regulation does not specify that only lead-acid batteries are allowed.
Related Questions
#422 You are in the planning stages of replacing a battery charger, where an exact duplicate of the charger to be replaced is not available. Obviously the charger must be suitable for the battery to be charged. According to 46 CFR, Subchapter J (Electrical Engineering), which of the following is a true statement concerning battery chargers? #423 Suppose a cargo vessel of 1600 gross tons or more is fitted with emergency storage batteries for the purpose of supplying emergency lighting and power. According to 46 CFR, Subchapter J (Electrical Engineering), the capacity of the storage batteries is such that they should be able to successfully power the emergency loads for a period of 18 hours. Beginning with fully charged batteries, what is the minimum allowable percentage of the voltage rating of the batteries after the 18 hour discharge period assuming a nominal voltage rating of 24 VDC and operating at rated capacity? #425 In accordance with 46 CFR Part 112, a storage battery for an emergency lighting and power system must have the capacity to accomplish which of the following? #426 Suppose a cargo vessel of 1600 gross tons or more is fitted with emergency storage batteries for the purpose of supplying emergency lighting and power. According to 46 CFR, Subchapter J (Electrical Engineering), the capacity of the storage batteries is such that they should be able to successfully power the emergency loads for a period of 18 hours. Beginning with fully charged batteries, what is the minimum allowable voltage of the batteries after the 18 hour discharge period assuming a nominal voltage rating of 24 VDC and operating at rated capacity? #427 While inspecting the copper commutator bars of a DC generator, you notice a chocolate brown film covering the bars. What should be done?