Coast Guard Exams
Question 425Electricity/Electronics - Assistant Engineer70% to pass

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?

AI Explanation
The correct answer is A) close all watertight doors twice and open them once. According to 46 CFR Part 112, the storage battery for an emergency lighting and power system must have the capacity to operate all watertight doors at least twice in the closed position and once in the open position. This requirement ensures that the emergency power system can reliably control the watertight doors during an emergency situation. The other answer choices are incorrect because they do not align with the specific requirements outlined in the regulation. Option B requires more door cycles than necessary, while options C and D specify time frames that are not part of the regulatory standard.

Related Questions

#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? #424 According to 46 CFR, Subchapter J (Electrical Engineering), which of the following statements concerning battery installations is correct? #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? #428 Incorrect brush pressure can result in accelerated brush wear on a DC generator. What statement concerning brush pressure is true?