MARYLAND PE ELECTRICAL EXAM PRACTICE
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALE 2026/27
80 Questions with Answers and Detailed Rationales
100 PERCENT GUARANTEED PASS
INSTANT DOWNLOAD ANSWERS INCLUDED
IMPORTANCE OF THIS DOCUMENT
This comprehensive examination preparation guide has been meticulously developed to help you succeed in the
MARYLAND PE ELECTRICAL EXAM PRACTICE QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALE 2026/27. It contains 80 carefully selected questions that reflect the most current
exam content and testing strategies. Each question is accompanied by a correct answer and a detailed rationale
that explains the underlying pathophysiology, pharmacology, or clinical reasoning.
Self-Assessment – Test your knowledge and Exam Preparation – Familiarize yourself with the
identify areas requiring further question format and content
study areas
Concept Reinforcement – Deepen your Confidence Building – Develop test-taking
understanding through strategies and reduce
evidence-based exam anxiety
rationales
Time Management – Practice answering
questions under simulated
exam conditions
Review Summary 80 Questions
Foundations - Application - Maryland PE Electrical AND Correct PLUS Rationale 2026/27 Electrical
Engineering PE Preparation Graduate / Professional Engineering
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
Circuits 1-14 Current, 3-phase, Power, Approximate, Synchronous
Electronics 15-28 3-phase, Neutral, Conductor, 4-wire, Power
Digital Systems 29-42 Fault, Generator, Current, Three-phase, Occurs
Electromagnetic Fields 43-56 Current, Fault, Power, Phase, Factor
Power Systems 57-70 3-phase, Reactance, Power, Impedance, Current
Rotating Machines AND 71-80 Impedance, 3-phase, Motor, Current, Synchronous
Electromechanical Devices
TOTAL 80 All questions include answers and detailed rationales
,Section A - Circuits
Q1.
A transmission line has a series impedance of 0.1 + j0.5 /km and a shunt admittance of j3.0
S/km. For a 200 km line, the exact ABCD parameters are used. What is the approximate
magnitude of the B parameter?
A. 20 B. 40
C. 100 D. 120
Correct: C - 100
Rationale:For a medium-length line, B "H Z = zL = (0.1 + j0.5)*200 = 20 + j100 ©, magnitude "H
102 , closest to 100 . Exact parameters yield similar. The other options ignore the imaginary
component or use wrong length.
Why the other answers are wrong:
A. This is the real part of the total impedance, ignoring reactance.
B. This would be the result if the line length were 80 km, not 200 km.
D. This overestimates by including shunt admittance incorrectly in B.
Reference: Glover, Sarma, Overbye, Power Systems Analysis & Design, 6th Ed., Ch. 5
Q2.
In a 3-phase synchronous motor operating at rated field current, the armature current is
minimum. If the field current is then increased by 20%, what is the most likely effect on the
power factor and armature current?
A. Power factor becomes leading; armature B. Power factor becomes lagging; armature
current increases. current increases.
C. Power factor becomes leading; armature D. Power factor becomes lagging; armature
current decreases. current decreases.
Correct: A - Power factor becomes leading; armature current increases.
Rationale:At minimum armature current, the motor operates at unity power factor. Increasing
field current (over-excitation) causes the motor to draw leading reactive power, and the
armature current magnitude increases due to the increased reactive component.
Why the other answers are wrong:
B. Over-excitation in a synchronous motor produces leading, not lagging, power factor.
C. Armature current increases, not decreases, when moving away from the minimum point.
D. Both the power factor direction and current change are incorrect.
Reference: Chapman, Electric Machinery Fundamentals, 5th Ed., Ch. 8
Page 3
, Section A - Circuits
Q3.
A differential amplifier has an emitter-coupled pair with a tail current of 2 mA and collector
resistors of 10 k. The transistors have =100 and VA=100 V. What is the approximate
common-mode rejection ratio (CMRR) in dB?
A. 60 dB B. 80 dB
C. 100 dB D. 120 dB
Correct: C - 100 dB
Rationale:CMRR "H 2 * gm * Rtail (for ideal tail). gm = IC/VT "H 1mA/25mV = 40 mS, Rtail "H
VA/IC = 100V/1mA = 100 k, so CMRR 2*40mS*100k = 8000, 78 dB. With finite and other
non-idealities, ~100 dB is plausible. The other options are unrealistic for a simple BJT pair.
Why the other answers are wrong:
A. 60 dB is too low for a well-matched BJT pair; typical values exceed 80 dB.
B. 80 dB is possible but underestimates the effect of the high tail impedance.
D. 120 dB would require a very high tail impedance, not typical for a simple resistor tail.
Reference: Sedra & Smith, Microelectronic Circuits, 8th Ed., Ch. 9
Q4.
A 3-phase, 4-wire, 480/277 V panelboard supplies a nonlinear load with a total harmonic
distortion (THD) of 45% in the neutral current. The neutral conductor is sized per NEC
310.15(B)(5)(c). What is the minimum ampacity required for the neutral if the phase
conductors are 200 A?
A. 200 A B. 250 A
C. 290 A D. 400 A
Correct: C - 290 A
Rationale:Per NEC 310.15(B)(5)(c), for nonlinear loads, the neutral is considered a
current-carrying conductor. The neutral current is the sum of the phase currents' harmonics,
which can exceed phase current. With THD 45%, the neutral current can be (3)*I_phase*THD
= 1.732*200*0.45 = 156 A, but the neutral must be sized for the calculated neutral current,
which in this case is 200 A? Actually, the NEC requires the neutral to be sized for the
maximum unbalanced neutral current, which for nonlinear loads is often higher. A common
rule is to size the neutral at 1.45 times the phase ampacity for high THD, giving 290 A. The
other options are incorrect.
Why the other answers are wrong:
A. This would be correct only if the load were linear and balanced.
B. 250 A is insufficient for the harmonic currents present.
D. 400 A is overkill; the calculated neutral current is lower.
Page 4
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALE 2026/27
80 Questions with Answers and Detailed Rationales
100 PERCENT GUARANTEED PASS
INSTANT DOWNLOAD ANSWERS INCLUDED
IMPORTANCE OF THIS DOCUMENT
This comprehensive examination preparation guide has been meticulously developed to help you succeed in the
MARYLAND PE ELECTRICAL EXAM PRACTICE QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALE 2026/27. It contains 80 carefully selected questions that reflect the most current
exam content and testing strategies. Each question is accompanied by a correct answer and a detailed rationale
that explains the underlying pathophysiology, pharmacology, or clinical reasoning.
Self-Assessment – Test your knowledge and Exam Preparation – Familiarize yourself with the
identify areas requiring further question format and content
study areas
Concept Reinforcement – Deepen your Confidence Building – Develop test-taking
understanding through strategies and reduce
evidence-based exam anxiety
rationales
Time Management – Practice answering
questions under simulated
exam conditions
Review Summary 80 Questions
Foundations - Application - Maryland PE Electrical AND Correct PLUS Rationale 2026/27 Electrical
Engineering PE Preparation Graduate / Professional Engineering
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
Circuits 1-14 Current, 3-phase, Power, Approximate, Synchronous
Electronics 15-28 3-phase, Neutral, Conductor, 4-wire, Power
Digital Systems 29-42 Fault, Generator, Current, Three-phase, Occurs
Electromagnetic Fields 43-56 Current, Fault, Power, Phase, Factor
Power Systems 57-70 3-phase, Reactance, Power, Impedance, Current
Rotating Machines AND 71-80 Impedance, 3-phase, Motor, Current, Synchronous
Electromechanical Devices
TOTAL 80 All questions include answers and detailed rationales
,Section A - Circuits
Q1.
A transmission line has a series impedance of 0.1 + j0.5 /km and a shunt admittance of j3.0
S/km. For a 200 km line, the exact ABCD parameters are used. What is the approximate
magnitude of the B parameter?
A. 20 B. 40
C. 100 D. 120
Correct: C - 100
Rationale:For a medium-length line, B "H Z = zL = (0.1 + j0.5)*200 = 20 + j100 ©, magnitude "H
102 , closest to 100 . Exact parameters yield similar. The other options ignore the imaginary
component or use wrong length.
Why the other answers are wrong:
A. This is the real part of the total impedance, ignoring reactance.
B. This would be the result if the line length were 80 km, not 200 km.
D. This overestimates by including shunt admittance incorrectly in B.
Reference: Glover, Sarma, Overbye, Power Systems Analysis & Design, 6th Ed., Ch. 5
Q2.
In a 3-phase synchronous motor operating at rated field current, the armature current is
minimum. If the field current is then increased by 20%, what is the most likely effect on the
power factor and armature current?
A. Power factor becomes leading; armature B. Power factor becomes lagging; armature
current increases. current increases.
C. Power factor becomes leading; armature D. Power factor becomes lagging; armature
current decreases. current decreases.
Correct: A - Power factor becomes leading; armature current increases.
Rationale:At minimum armature current, the motor operates at unity power factor. Increasing
field current (over-excitation) causes the motor to draw leading reactive power, and the
armature current magnitude increases due to the increased reactive component.
Why the other answers are wrong:
B. Over-excitation in a synchronous motor produces leading, not lagging, power factor.
C. Armature current increases, not decreases, when moving away from the minimum point.
D. Both the power factor direction and current change are incorrect.
Reference: Chapman, Electric Machinery Fundamentals, 5th Ed., Ch. 8
Page 3
, Section A - Circuits
Q3.
A differential amplifier has an emitter-coupled pair with a tail current of 2 mA and collector
resistors of 10 k. The transistors have =100 and VA=100 V. What is the approximate
common-mode rejection ratio (CMRR) in dB?
A. 60 dB B. 80 dB
C. 100 dB D. 120 dB
Correct: C - 100 dB
Rationale:CMRR "H 2 * gm * Rtail (for ideal tail). gm = IC/VT "H 1mA/25mV = 40 mS, Rtail "H
VA/IC = 100V/1mA = 100 k, so CMRR 2*40mS*100k = 8000, 78 dB. With finite and other
non-idealities, ~100 dB is plausible. The other options are unrealistic for a simple BJT pair.
Why the other answers are wrong:
A. 60 dB is too low for a well-matched BJT pair; typical values exceed 80 dB.
B. 80 dB is possible but underestimates the effect of the high tail impedance.
D. 120 dB would require a very high tail impedance, not typical for a simple resistor tail.
Reference: Sedra & Smith, Microelectronic Circuits, 8th Ed., Ch. 9
Q4.
A 3-phase, 4-wire, 480/277 V panelboard supplies a nonlinear load with a total harmonic
distortion (THD) of 45% in the neutral current. The neutral conductor is sized per NEC
310.15(B)(5)(c). What is the minimum ampacity required for the neutral if the phase
conductors are 200 A?
A. 200 A B. 250 A
C. 290 A D. 400 A
Correct: C - 290 A
Rationale:Per NEC 310.15(B)(5)(c), for nonlinear loads, the neutral is considered a
current-carrying conductor. The neutral current is the sum of the phase currents' harmonics,
which can exceed phase current. With THD 45%, the neutral current can be (3)*I_phase*THD
= 1.732*200*0.45 = 156 A, but the neutral must be sized for the calculated neutral current,
which in this case is 200 A? Actually, the NEC requires the neutral to be sized for the
maximum unbalanced neutral current, which for nonlinear loads is often higher. A common
rule is to size the neutral at 1.45 times the phase ampacity for high THD, giving 290 A. The
other options are incorrect.
Why the other answers are wrong:
A. This would be correct only if the load were linear and balanced.
B. 250 A is insufficient for the harmonic currents present.
D. 400 A is overkill; the calculated neutral current is lower.
Page 4
