Akwe Akel Maseka's Quiz History_ Quiz - Chapter 4 (Three-Phase Circuits)

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Arizona State University *

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Feb 20, 2024

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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 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