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Which publication should be consulted for electrical safety precautions?
NSTM 300
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Which system is the vital link connecting the generators that produce electric power to the equipment that uses it?
Distribution
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What is the primary power distribution system installed in ships?
Alternating Current (AC)
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The New Attack Submarine (NSSN) has high voltage dc generators that supply static frequency converters to produce 450V, three-phase, how many Hz power for the ship’s user equipment, and to provide dc power for main battery charging?
60
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Which type of distribution systems are used for combat systems, auxiliary systems, and emergency systems in submarines?
Direct Current (DC)
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The primary power distribution voltage, phase, and frequency used on U.S. Navy ships is how many volts (V), three-phase, 60 hertz (Hz)?
450
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Secondary voltage, phase, and frequency is how many volts (V), three-phase, 60 Hz?
120
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Single-phase power is available from the 450V and which other systems?
120V
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How many ground connection points are allowed for each grounded power system?
1
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What are all AC distribution systems on U.S. Navy ships?
Ungrounded
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Valuable information on a ship’s electrical installation can be found in which publication?
Ship Information Book (SIB)
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The ship service generators and distribution systems in most naval ships are designed so that the electric plants can be operated in how many ways?
2
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How many things should personnel operating naval electrical installations have?
5
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Which type of electric plant operation provides continuity of power to all ship service loads even if one generator suddenly trips offline and minimizes the magnitude of system voltage and frequency variations?
Parallel
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Which type of operation is the preferred mode of operating ship service generators on most surface ships?
Parallel
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On ships with diesel generators, generators should be operated so that the load on engines used is not less than what percent of full load?
50
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What virtually eliminates the likelihood that all the circuit breakers for paralleled generators will trip as a result of a system fault?
Selective tripping
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Which type of operation is the preferred mode of operating ship service generators on submarines because maintaining continuity of electrical power is secondary to preventing total loss of power?
Split plant
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Increased watchfulness is necessary to prevent overloading of the emergency generators when what is used?
Feedback tie
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Operation under casualty conditions depends on the type of casualty. Which type of operation is the preferred mode?
Parallel
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When the PMS is installed, preventive maintenance shall be performed in accordance with what?
MRC's
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Distribution system equipment requiring maintenance can be grouped into how many general classes?
2
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What is the phase sequence on United States Navy ships?
ABC
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The terminals on switchboards, distribution panels, and equipment are marked with what to identify the phase?
A, B, or C
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Exposed ends of individual conductor casualty power cables should be inspected at least how often?
Annually
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The older-style, casualty power portable cable terminates at each end of individual conductors with copper ferrules. After how many years or more of exposure, the conductor insulation may have aged and lost elasticity to the extent that it will crack open when bent during rigging of the casualty power system for emergency use?
5
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How many fundamental rules are there for the maintenance of electrical equipment?
3
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The older-style, casualty power portable cable terminates at each end of individual conductors with which type of ferrules?
Copper
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