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Subelement E
Power Sources:
Section 38
Battery Chargers and Power Sources:
How often should high charging be use with a standard lead acid battery and a fully automatic GMDSS compliant Battery charger?
  • Once every 24 hours for 1 hour.
  • Once every month till the battery reaches 2.5V/cell.
  • Never use High charging rate on a fully charged battery.
  • Correct Answer
    Once a week till the battery reaches the gassing range.
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What are the different modes of charging for a GMDSS compliant battery charger/supply?
  • Correct Answer
    Charging, Change-over, Parallel
  • Charging, float, trickle
  • Charging, Full, Trickle
  • Boots, Full, Float
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What would be an indication of a malfunction on a GMDSS station with a 24 VDC battery system?
  • All of these symptoms would indicate a potential battery charger malfunction.
  • Correct Answer
    A constant 30 volt reading on the GMDSS console voltmeter.
  • After testing the station on battery power, a voltmeter reading of 30 volts for a brief period followed by a steady 26 volt reading.
  • After testing the station on battery power, the ammeter reading indicates a high rate of charge that then declines.
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What is the meaning of "Reserve Source of Energy"?
  • High caloric value items for lifeboat, per SOLAS regulations.
  • Diesel fuel stored for the purpose of operating the powered survival craft for a period equal to or exceeding the U.S.C.G. and SOLAS requirements.
  • Correct Answer
    Power to operate the radio installation and conduct Distress and Safety communications in the event of failure of the ship's main and emergency sources of electrical power.
  • The diesel fueled emergency generator that supplies AC to the vessel's Emergency power bus.
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With a fully automatic GMDSS compliant battery charger / power supply, when must the high charging process be interrupted?
  • To keep the battery from overheating.
  • To keep the battery electrolyte from reaching 212 degrees F.
  • Correct Answer
    To inhibit the generation of electrolytic gas.
  • To keep the battery as cool as possible.
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A fully automatic GMDSS compliant Battery charger/ Power supply's high (Full) charging mode must be disabled during setup for what type batteries?
  • When the batteries are Ni Cadmium type.
  • When the Batteries are standard lead acid type.
  • When the batteries are lithium ion type.
  • Correct Answer
    When the batteries are Maintenance free lead acid gel type.
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