Akwe Akel Maseka's Quiz History_ Quiz - Chapter 4 (Three-Phase Circuits)
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Arizona State University *
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Electrical Engineering
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Feb 20, 2024
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4
Uploaded by SuperHumanBadger3986
8/9/2021
Akwe Akel Maseka's Quiz History: Quiz - Chapter 4 (Three-Phase Circuits)
https://asu.instructure.com/courses/66939/quizzes/442145/history?version=2
1/4
Quiz - Chapter 4 (Three-Phase Circuits)
Results for Akwe Akel Maseka
Correct answers are hidden.
Score for this attempt: 24
out of 29
Submitted Oct 12, 2020 at 4:16pm
This attempt took 10 minutes.
3 / 3 pts
Question 1
Three-phase circuits can sometimes be modeled as single-
phase circuits.
True False 0 / 5 pts
Question 2
Answer 1:
Answer 2:
Incorrect
Incorrect
In a positive sequence, V
lead
V
by 120° and V
lag
V
by 120°.
bn
an
bn
cn
lead
lag
8/9/2021
Akwe Akel Maseka's Quiz History: Quiz - Chapter 4 (Three-Phase Circuits)
https://asu.instructure.com/courses/66939/quizzes/442145/history?version=2
2/4
Refer to slide 6 on page 1 in the lecture notes or page 146 (section
4.1) in the textbook.
5 / 5 pts
Question 3
Match the circuit configuration to its respective reference voltage.
Wye (Y)
Van
Delta (Δ)
Vab
3 / 3 pts
Question 4
For a balanced wye-connected power system, calculate the phase voltage
magnitude if the line voltage is 480 V.
277.128
3 / 3 pts
Question 5
In a wye-connected three-phase system: If the phase current = 10 A,
compute the line current magnitude (in amps).
8/9/2021
Akwe Akel Maseka's Quiz History: Quiz - Chapter 4 (Three-Phase Circuits)
https://asu.instructure.com/courses/66939/quizzes/442145/history?version=2
3/4
10
3 / 3 pts
Question 6
In a three-phase delta-connected system: if the phase voltage is 120 V,
determine the line voltage magnitude.
120
3 / 3 pts
Question 7
In a delta-connected system: if the phase current is 60 A, calculate the
line current magnitude (in amps)? 103.923
4 / 4 pts
Question 8
Select the most significant advantage of three-phase systems over single-
phase systems.
Higher efficiency of power transmission
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8/9/2021
Akwe Akel Maseka's Quiz History: Quiz - Chapter 4 (Three-Phase Circuits)
https://asu.instructure.com/courses/66939/quizzes/442145/history?version=2
4/4
Generation of constant torque which results in reduced vibration for
rotating machines
Three-phase transmissions lines carry more power than single-phase
transmission lines
Most aesthetic approach of transmitting electric power Quiz Score: 24
out of 29
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