Question 1
A 480-volt, three-phase feeder on a Mississippi commercial job supplies a balanced load of 75 amperes at a lagging power factor of 0.90. Using √3 = 1.732, what is the real power of this load?
Correct Answer:
56.1 kW
Question 2
A 60 Hz series circuit contains 12 ohms of resistance, 16 ohms of inductive reactance, and 7 ohms of capacitive reactance. What is the total impedance?
Correct Answer:
15 ohms
Question 3
A 112.5 kVA, three-phase transformer has a 480-volt primary and a 208Y/120-volt secondary. Using √3 = 1.732, what is the secondary full-load line current?
Correct Answer:
312 A
Question 4
A 480-volt, three-phase circuit carries 90 amperes for 180 feet on copper conductors. Use K = 12.9, √3 = 1.732, and a circular-mil area of 83,690 CM for 1 AWG. What is the voltage drop?
Correct Answer:
4.3 V
Question 5
What is the peak (zero-to-peak) value of a 277-volt RMS sinusoidal line-to-neutral voltage? Use √2 = 1.414.
Correct Answer:
391.7 V
Question 1
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Prepare with the MS Master Electrician Practice Questions - Mississippi Master Electrician Contractor Examination Exam practice quiz. This question bank includes 100 questions covering copper, conductors, table, volt, and conductor. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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MS Master Electrician Practice Questions - Mississippi Master Electrician Contractor Examination Exam

This practice set contains 100 questions from the matching question bank and focuses on copper, conductors, table, volt, and conductor. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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