7-28.
What voltage is needed to operate
the single-phase motor at the motor
pool?
1.
110 V
2.
220 V
3. 330 V
4.
440 V
7-29.
When the voltage remains constant,
what happens to amperage when
(a) resistance is decreased or
(b) power consumption is decreased?
1.
(a) It
(b) it
2.
(a) It
(b) it
3.
(a) It
(b) it
4. (a) It
(b) it
increases
decreases
decreases
decreases
increases
increases
decreases
increases
7-30.
Which of the following reasons is
NOT an advantage of installing
electrical distribution systems
underground, rather than overhead?
1.
Underground installation costs
are less
2.
Underground lines are secure
against high winds
3.
Underground lines are less
susceptible to enemy attack
4.
Underground installation
provides open land areas free
from distribution systems
7-31.
Electrical power is brought into a
building through what device or
conductor?
1.
Panel board
2.
Switchboard
3.
Service drop
4. Service entrance
7-32.
What electrical device
automatically opens a circuit when
the amperage exceeds the rated
value for that device?
1.
Panel box
2.
Circuit breaker
3.
Switch
4.
Disconnect
7-33.
Compared to a No. 4 AWG conductor,
the size of a No. 16 AWG conductor
is
1.
smaller
2.
equal
3.
larger
7-34.
7-35.
7-36.
7-37.
7-38.
7-39.
7-40.
What size wire is
used for interior
most frequently
wiring?
1.
2.
3.
4.
In
is
1.
2.
3.
4.
No.
16 AWG
No. 12 AWG
No.
8 AWG
No.
6 AWG
which of the following locations
ROMEX NOT authorized for use?
Embedded in concrete
In garages
In an explosives storage
building
All of the above
Which of the following types of
insulation should be used for
installation in wet locations?
1. RH
2.
RHW
3. RUH
4.
Each of the above
Which, if any, of the following
types of insulation is considered
to be suitable for use in dry
locations?
1.
RHW
2. T
3. TW
4. None of the above
Instead of manually making a sharp
bend in rigid aluminum conduit,
which of the following fittings
should you use?
1.
Coupling
2.
Conduit union
3.
Condulet
4.
Galvanized steel elbow
Which of the following types of
conduit can be
1.
2.
3.
4.
For
the
you
1.
2.
3.
4.
Rigid
PVC
EMT
Greenfield
installing
threaded?
a switch, which of
following outlet boxes should
use?
4-inch octagon box
Gem box
Handy box
4-inch square box
46
