6-40.
6-41.
6-42.
6-43.
6-44.
Before using a torque wrench, you
should check which of the following
labels?
1.
Safety
2.
Adjustment
3.
Collimation
4.
Calibration
Which of the following substances
offers resistance to electric
current?
1.
Iron
2.
Copper
3.
Aluminum
4.
Mica
What term defines the rate at which
current passes through a circuit?
1.
Ampere
2.
volt
3. ohm
4.
Watt
A unit of electrical resistance is
known as a/an
1.
watt
2.
ampere
3. ohm
4.
volt
A soldering iron is rated at 100
watts.
This statement provides
which of the following information
about the soldering iron?
1.
The power consumed by the
soldering iron
2.
The emf of the iron
3.
The resistance of the iron
4.
The rate at which current flows
through the soldering iron
6-45.
A shipboard generator operates at
maximum efficiency under which of
the following conditions?
1.
At full-rated load
2.
With all batteries fully
charged
3.
At periods of minimum power
demand
4.
When in series with other
generators of the same rated
output
6-46.
The rotating member of a dc
generator is known as the
1.
field winding
2.
armature
3.
rotor
4.
yoke
6-47.
Most emergency generators installed
on ships operate at what voltage
and frequency, respectively?
1.
450 volts, 60 hertz
2.
220 volts, 50 hertz
3.
450 volts, 50 hertz
4.
110 volts, 60 hertz
6-48.
Revolving-field generators are
superior to revolving-armature
generators for which of the
following reasons?
1.
2.
3.
4.
The load current from the
stator is connected to the
external circuit without the
use of a commutator
Only two slip rings are
required to supply excitation
The stator windings are not
subjected to mechanical
stresses
All of the above
36
