IEC Year 2 Final Review Questions And Answers Graded A+.
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IEC
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IEC
IEC Year 2 Final Review Questions And Answers Graded A+.
Refer to the information shown in Figure 234.151. When the tap for Motor 3 terminates in a safety switch, the maximum permitted size for DETD fuses in this switch would be _____ A. - correct answer. 15
Refer to the informatio...
IEC Year 2 Final Review Questions And
Answers Graded A+.
Refer to the information shown in Figure 234.151. When the tap for Motor 3 terminates
in a safety switch, the maximum permitted size for DETD fuses in this switch would be
_____ A. - correct answer. 15
Refer to the information shown in Figure 234.151. When the tap for Motor 1 terminates
in a breaker enclosure, the maximum permitted size for an ITCB in this enclosure would
be ____ A. - correct answer. 70
Refer to the information shown in Figure 234.151. When th etap for Motor 3 terminates
in a breaker enclosure, the maximum permitted size for an ITCB in this enclose would
be ____ A. - correct answer. none of these
Voltage Drop Scenario #3
The distance between the panel and a load is 150 feet. The circuit to the load consists
of two 12 AWG solid copper coated conductors that are connected to a 1-pole breaker
in a 277/480-volt, 3Ø, 4-wire panel and the neutral bar. The load draws 9.8 amps.
Refer to Voltage Drop Scenario #3. If the voltage drop is to be limited to 2.2%, this is
___ volts. - correct answer. 6.09
Refer to Figure 221.404. The voltage applied to Heating Element B is ___ volts. -
correct answer. 138.6
Refer to the nameplate and heater selection table, shown above in Figure 230.122. For
a correctly sized starter, the heater catalog number for the heaters is ___. This motor is
supplied power from a 120/240-volt, 3-phase, 4-wire panelboard. - correct answer.
B32
, Refer to the nameplate shown in Figure 230.122. The branch circuit for the motor is
supplied from a 240/120-volt, 3Ø, 4-wire panelboard. What is the minimum size (3 wire
+ ground) SO cord that could be used as a flexible connection for the motor? - correct
answer. 8
Refer to the nameplate shown in Figure 230.122. This motor should draw ___ amps at
rated voltage when connected to Circuit 4-6-8 that is fed from a 3-pole breaker in a
120/240-volt, 3Ø, 4-wire panelboard. - correct answer. 18.6
Two lighting circuits are supplied from a multiwire branch circuit that originates in a
120/240 volt, 1Ø, 3-wire panelboard. Two, 20 Amp, 1-pole breakers are installed in
spaces 22 & 24 for the multiwire circuit. Circuit 22 has 2600 watts of lights connected to
it, and Circuit 24 has 2100 watts of lights connected to it. Which of the following should
happen to Circuit 22? - correct answer. An overload will occur and the breaker will trip.
Refer to Figure 221.402. If Ammeter 2 indicates 38.5 amps, the generator is delivering
___ kW of power. - correct answer. 16.0
The service disconnecting means for a 3-phase service is permitted to consist of ___. -
correct answer. any of the above
Nontime-delay fuses are to be installed in a safety switch adjacent to a motor. See
Figure 230.225. Fuses with a rating not exceeding ___ A are permitted. - correct
answer. 100
The classification of a location, where ignitable concentrations of flammable liquid-
produced vapors or combustible liquid-produced vapors exist under normal operating
conditions, is ___. - correct answer. Class I, Division 1
If a 4-wire, wye-connected supply system has a line-to-line voltage of 13.5 kV, what is
the line-to-neutral voltage? - correct answer. 7,800
Refer to the motor nameplate shown in Figure 230.108. A NEMA starter will be used for
this motor. The fewest number of heaters that can be installed in the starter per the
NEC ® is ___. The motor circuit is supplied from a 2-pole breaker in a 120/240-volt, 3Ø,
4-W panel. - correct answer. 1
A transformer has a primary rated voltage of 120 and a secondary rated voltage of 16. If
the current in the circuit conductors connected to the primary is 1.1 amps, the load that
is connected to the secondary must be drawing ___ amps. - correct answer. 8.25
A set of wires (black, red, blue and green) are installed between a 3-pole safety switch
and a 3Ø motor. The direction of rotation of the motor can be changed by swapping the
___ wire connections on the load side of the switch. - correct answer. black and blue
___ is permitted to be installed in a concrete floor slab.
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