200+ Free PE Electrical Practice Questions

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Question 1

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What is the RMS value of a sinusoidal voltage with a peak value of 170V?

85V

120V

170V

240V

to track

2026 Statistics

Key Facts: PE Electrical Exam

Exam Questions

NCEES

8 hrs

Test Time

NCEES

57%

Power Pass Rate

NCEES 2024

$400

Exam Fee

NCEES

Main Topics

NCEES

9 hrs

Total Appointment

NCEES

The PE Electrical exam has first-time pass rates of approximately 57% for the Power track and 65% for the Electronics/Controls track. The 80-question computer-based exam allows 9 hours total (including tutorial and break). The exam uses the NCEES PE Electrical Reference Handbook. The Power track is the most common and covers circuit analysis, power systems, rotating machines, protection, and power electronics. Strong preparation in circuit analysis, power systems fundamentals, and protection systems is essential.

Sample PE Electrical Practice Questions

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1What is the RMS value of a sinusoidal voltage with a peak value of 170V?

A.85V

B.120V

C.170V

D.240V

Explanation: The RMS value of a sinusoidal waveform is Vpeak/√2. Therefore, 170V/√2 = 170/1.414 = 120V. This is the standard RMS value for a 120V AC outlet in North America.

2In a balanced three-phase system, what is the relationship between line voltage (VL) and phase voltage (Vph) in a wye-connected system?

A.VL = Vph

B.VL = √3 × Vph

C.VL = Vph/√3

D.VL = 2 × Vph

Explanation: In a wye-connected system, the line voltage is √3 times the phase voltage (VL = √3 × Vph). This is because the line voltage is the vector difference between two phase voltages that are 120° apart.

3What is the power factor of a purely resistive load?

A.0

B.0.5

C.0.707

D.1.0

Explanation: A purely resistive load has a power factor of 1.0 (unity). This is because the voltage and current are in phase, so the phase angle θ = 0°, and cos(0°) = 1.

4A transformer has 1000 turns on the primary and 100 turns on the secondary. If the primary voltage is 2400V, what is the secondary voltage?

A.240V

B.480V

C.1200V

D.24000V

Explanation: The transformer turns ratio is N1/N2 = 1000/100 = 10. The secondary voltage is V1/(N1/N2) = 2400V/10 = 240V. This is a step-down transformer.

5What is the per unit value of a 50 MVA transformer base when using a 100 MVA system base?

A.0.25

B.0.5

C.1.0

D.2.0

Explanation: Per unit value = Actual value / Base value = 50 MVA / 100 MVA = 0.5 pu. The per unit system normalizes values to a common base for easier system analysis.

6In a balanced three-phase delta-connected system, what is the relationship between line current (IL) and phase current (Iph)?

A.IL = Iph

B.IL = √3 × Iph

C.IL = Iph/√3

D.IL = 2 × Iph

Explanation: In a delta-connected system, the line current is √3 times the phase current (IL = √3 × Iph). This is the opposite relationship from the wye connection for voltages.

7What is the synchronous speed of a 4-pole, 60 Hz induction motor?

A.900 RPM

B.1200 RPM

C.1800 RPM

D.3600 RPM

Explanation: Synchronous speed Ns = 120f/P = (120 × 60)/4 = 7200/4 = 1800 RPM. The synchronous speed is determined by the supply frequency and number of poles.

8What is the purpose of a current transformer (CT)?

A.Step up voltage

B.Step down voltage

C.Measure high currents

D.Provide electrical isolation

Explanation: Current transformers (CTs) are used to measure high currents by producing a proportional lower current suitable for metering and protection devices. The secondary is typically rated at 5A or 1A.

9What is the power consumed by a 10 Ω resistor with 5A current flowing through it?

A.25W

B.50W

C.125W

D.250W

Explanation: Using P = I²R: P = (5A)² × 10Ω = 25 × 10 = 250W. Alternatively, V = IR = 50V, and P = VI = 50V × 5A = 250W.

10In a series RL circuit, what is the phase relationship between voltage and current?

A.Current leads voltage

B.Current lags voltage

C.Voltage and current are in phase

D.Phase relationship depends on frequency

Explanation: In an inductive circuit (RL), the current lags the voltage. The inductor opposes changes in current, causing the current waveform to lag behind the voltage waveform by an angle between 0° and 90°.

About the PE Electrical Exam

The NCEES PE Electrical exam is an 80-question computer-based test designed for engineers with a minimum of four years of post-college work experience. The Power exam track covers Power Systems Analysis (45%), Electronics & Controls (30%), and Computer Engineering (25%). Key topics include circuit analysis, three-phase power, transformers, motors and generators, power electronics, transmission and distribution systems, protective relaying, grounding, power quality, control systems, digital logic, and microprocessors. The exam emphasizes practical application of electrical engineering principles.

Questions

80 scored questions

Time Limit

8 hours

Passing Score

Approximately 70% (scaled)

Exam Fee

$400 (NCEES (Pearson VUE))

PE Electrical Exam Content Outline

45%

Power Systems Analysis

Circuit analysis, three-phase power, transformers, per unit system, load flow, fault analysis, transmission lines, voltage regulation, power factor correction

30%

Electronics & Controls

Power electronics, rectifiers, inverters, DC-DC converters, motor drives, control systems, PID controllers, transfer functions, stability analysis

25%

Computer Engineering

Digital logic, Boolean algebra, combinational/sequential circuits, microprocessors, memory systems, data acquisition, communication systems

How to Pass the PE Electrical Exam

What You Need to Know

Passing score: Approximately 70% (scaled)
Exam length: 80 questions
Time limit: 8 hours
Exam fee: $400

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

PE Electrical Study Tips from Top Performers

1Master the NCEES PE Electrical Reference Handbook - know where formulas and tables are located

2Focus on Circuit Analysis, Three-Phase Power, and Power Systems as the foundation

3Practice time management - 6 minutes per question on average

4Work through many fault analysis and protection relaying problems

5Understand the per unit system thoroughly - used throughout power systems analysis

6Study symmetrical components for unbalanced fault calculations

7Know transformer connections (delta-wye, wye-delta) and phase shifts

8Review control systems fundamentals - transfer functions, Bode plots, stability

9Practice with the electronic handbook format before exam day

Frequently Asked Questions

What is the PE Electrical exam pass rate?

First-time taker pass rates vary by exam track: Power exam approximately 57%, Electronics/Controls/Communications approximately 65%, and Computer Engineering approximately 62% (NCEES 2024 data). The Power track has the lowest pass rate but is the most commonly taken. Repeat takers have significantly lower pass rates of approximately 30-40%.

How hard is the PE Electrical exam?

The PE Electrical exam is considered challenging, particularly the Power track which has a 57% pass rate. The exam tests both theoretical knowledge and practical engineering application. Most successful candidates study 250-350 hours over 3-6 months. The Power track requires strong fundamentals in circuit analysis, power systems, and protection. Many candidates take review courses specifically focused on the Power exam.

What are the PE Electrical exam requirements?

To take the PE Electrical exam, you need: (1) a bachelor's degree from an ABET-accredited engineering program, (2) passing the FE exam, (3) typically 4 years of progressive electrical engineering experience (varies by state), and (4) state board approval. Some states have additional requirements like references. The experience should be under a licensed PE and demonstrate increasing responsibility.

Which PE Electrical exam track should I choose?

Most candidates choose the Power track as it aligns with utility and industrial power systems work. Choose the Electronics/Controls track if you work in electronics design, control systems, or manufacturing. Choose Computer Engineering if you work in digital design, embedded systems, or computer hardware. Select the track that matches your professional experience for the best preparation.

What references are provided during the exam?

NCEES provides the PE Electrical Reference Handbook as a searchable PDF during the exam. You cannot bring personal reference materials. The handbook includes formulas, tables, and reference data. It's critical to familiarize yourself with the electronic handbook format before exam day. The NCEES website offers a free PDF version for study purposes.

What topics are most heavily tested on the PE Electrical Power exam?

The most heavily tested topics are Circuit Analysis, Three-Phase Power, Transformers, Motors/Generators, and Power System Protection. Expect questions on load flow, fault calculations, per unit system, protective relaying, grounding, and power quality. The exam balances theoretical calculations with practical power system design and analysis.