Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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_________ are required to prevent shock hazards that occur from touching
metallics parts of an electrical system.
a. | Fuses | c. | Electrical grounding switches | b. | Circuit
Breakers | d. | Disconnect
switches |
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2.
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Every panel and many external components in an electrical control system must be
grounded by connecting ground wire to the __________.
a. | main panel enclosure | c. | control transformer winding | b. | dc power ground
source | d. | main power ground
conductor |
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3.
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The ___________ defines a set of requirements for the conductors that are used
in electrical panel grounding systems.
a. | National Electrical Code | c. | National Association of
Manufacturers | b. | Occupational Safety and Health Administration | d. | National Electrical Contractors
Association |
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4.
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When using a DMM to verify a grounding system, the measurement mode is set to
__________.
a. | AC voltage | c. | current | b. | DC voltage | d. | resistance |
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5.
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____________ provide the channels that route wire between the components inside
and electrical panel.
a. | Wire ties | c. | Wire anchors | b. | Wireways | d. | Wire sleeves |
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6.
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Before connecting a wire to an electrical panel component, it is important to
first determine the wire ____________.
a. | length | c. | connectivity | b. | resistance | d. | temperature |
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7.
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When connecting wire to a screw terminal using the straight wire method, it is
important to make sure that the terminal clamp is in contact with the __________.
a. | wire insulation | c. | ground wire | b. | terminal screw | d. | bare wire |
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8.
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If solid wire is nicked during the stripping process, a good practice is to
__________.
a. | smooth our the wire with a file | c. | cut and strip the wire
again | b. | repair the wire using solder | d. | splice the wire with another
wire |
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9.
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Two common methods to identify wires that are run between panels are _________
method and continuity test method.
a. | terminal block | c. | resistance test | b. | wire label | d. | wire length |
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10.
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Wires fed through conduit by hand or by using __________.
a. | electrical tape | c. | wireways | b. | fish tape | d. | wire ties |
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11.
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Using ________ is the best wire bundling method when there is more space inside
the panel.
a. | wire ties | c. | wireways | b. | wire sleeves | d. | wire tape |
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12.
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____________ are used together with wire ties to bundle wire along the back of a
panel.
a. | Fish tape | c. | Wireways | b. | Sleeves | d. | Anchors |
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13.
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When taping motor leads with wire having insulation rated for 450 VAC, there
should be _____________ layers of tape.
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14.
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Operation verification of a motor control system is done by verifying
____________.
a. | wiring connections | c. | disconnect voltage | b. | circuit breaker connections | d. | power phase |
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Matching
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Segment 1 Matching
a. | NEC | d. | terminal blocks | b. | normal | e. | stranded | c. | resistance |
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15.
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The grounding conductors install in an electrical control panel should comply
with ________ standards.
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16.
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Ground __________ are used to conect ground wires between panels.
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17.
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The NEC requires that insulated wire used for grounding conductors must be
either solid or ________.
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18.
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Grounding conductors will not carry current during _______ operating
conditions.
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19.
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One way to verify proper installation of a grounded system is to check the
electrical continuity by measuring the wire _______ with a DMM.
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Segment 2 and 3 Matching
a. | five | f. | mechanical
strength | b. | identified | g. | tape | c. | label | h. | wireways | d. | fish
tape | i. | continuity
test | e. | length | j. | lug
connector |
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20.
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__________ are used in electrical panels to route wire between panel
components.
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21.
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A wire’s ________ must be determined before it can be installed in an
electrical panel.
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22.
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Two common methods to connect wires to screw terminals are the straight wire
and _______ method.
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23.
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It is important to properly strip and ________ a wire before it is terminated
inside an electrical panel.
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24.
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Nicked solid wire reduces the __________ of the wire.
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25.
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When feeding wire through conduit, each wire must have a way of being _______
in the other panel.
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26.
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Two common methods to identify wires are the wire label method and _______
identification method.
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27.
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The wire label method is used when the longest wire length is less than ______
feet.
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28.
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A(n) ________ tool is used to pull wires when the conduit is long or has many
bends.
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29.
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It is common practice to _________ the ends of the wires before feeding them
through the conduit.
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Segment 4 and 5 Matching
a. | wire tie tool | f. | 100 | b. | terminal blocks | g. | wireways | c. | wire
sleeves | h. | ring
lug | d. | 6.25 | i. | anchors | e. | wire ties | j. | power leads |
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30.
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A(n) ________ is used to tighten and cut wire ties.
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31.
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Three common methods of bundling wires are _____, wire ties, and wire
sleeves.
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32.
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_________ are nylon straps that are used to pull loose wires together into a
bundle.
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33.
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______ are used to secure wire bundles to the inside of a panel.
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34.
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______ are often used in areas where wires might get pinched or
damaged.
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35.
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Motor leads must be spliced to the _______.
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36.
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_________ connectors are commonly used to splice motor wires.
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37.
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The rule for taping motor leads is there should be one layer of tape for every
________ volts(s) of the wire’s insulation rating.
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38.
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Each turn of the tape should overlap the previous turn by ______ mm.
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39.
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__________ are used to connect the motor power wiring that is run between the
control panel and the motor junction box.
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