2-22.
In transformer lead markings, the
2-27.
When a generator is used
2–23.
2-24.
2-25.
2-26.
high voltage leads are marked H1,
H2, H3, etc. The letter signifies
high voltage, what does the number
indicate?
1.
Numerical position from the
transformer’s core
2.
Shows total number of high
voltage leads
3.
The higher the number, the
higher the voltage
4. Used for identification and
tracing purposes
Transformer secondary lead markings
are identified by which of the
following letters?
1. R
2. H
3. X
4. S
Which of the following types of
equipment are used to supply 400
Hertz power to a transformer?
1.
Motor-generator units
2.
Static converters
3. Both 1 and 2 above
4.
Steam turbines
What is the primary purpose of the
casualty power system?
1.
To make temporary connections
to vital circuits
2.
To make permanent connections
to vital equipment
3.
To make permanent connections
to vital circuits
4.
To make temporary connections
to ac generators
Casualty power bulkhead terminals
are permanently installed on
opposite sides of bulkheads for
what reason?
1.
To provide casualty power to
selected equipment
2.
To transfer power through decks
without loss of watertight
integrity
3. To transfer power through decks
180° out of phase with other
bulkhead terminals
4.
To transfer power through decks
90° out of phase with other
bulkhead terminals
2-28.
2-29.
2-30.
2-31.
exclusively for casualty power, you
must perform which of the following
actions?
1.
Open the generator circuit
breaker
2. Open the generator disconnect
links
3.
Remove all normal circuits from
the switchboard that the
generator is feeding
4.
Transfer all bus transfer
switches to emergency power
A portable cable used to rig ac
casualty power can carry (a) what
maximum amount of current and (b)
for what maximum number of hours?
1.
(a) 93 A
(b) 4 hours
2.
(a) 93 A
(b) 40 hours
3.
(a) 200 A
(b) 40 hours
4.
(a) 200 A
(b) 4 hours
Shore power connections aboard ship
may be used to supply power to
another ship alongside.
1.
True
2.
False
When testing shore power cables,
you should use which of following
grounds as a shore ground
resistance?
1.
The ship’s hull
2.
A 16 AWG or larger wire with
one side cropped over the side
of the ship
3.
The enclosure that houses the
shore-power terminals or
receptacles
4.
Phase A of the shore-power
cable
What is the key component of the
phase-sequence indicator?
1. The three-phase induction motor
2.
The saturable reactor
3.
The ion drive clutch assembly
4. The digital display
Learning Objective: Describe and identify
components of various gyrocompass systems.
2-32.
The gyrocompass system provides a
means of determining ownship’s
1.
heading, roll, and pitch
2.
speed, distance, and bearing
3.
heading, speed, and distance
4. speed, roll, and pitch
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