Best Calculators for the PE Exam 2026: All NCEES-Approved Models Compared
Video
What is the RMS value of a sinusoidal voltage with a peak value of 170V?
Pe Electrical Power Systems
Question · Easy
Lockout/tagout, called like a cup final
Short
Complete guide to every NCEES-approved calculator for the 2026 PE exam. Side-by-side comparison of TI-36X Pro, Casio fx-115ES Plus, fx-991CW, TI-30XIIS & more — with discipline-specific tips for Civil, Mechanical, Electrical, Chemical, and Environmental PE exams.
Blog
In a balanced three-phase system, what is the relationship between line voltage (VL) and phase voltage (Vph) in a wye-connected system?
Chapter 1: Exam Overview & Power Engineering Fundamentals
1.1 PE Power Exam Structure, Official Specification & NCEES Reference Strategy
Study guide
What is the power factor of a purely resistive load?
Engineering Exam Prep Podcast
Listen on Spotify
Podcast
FE Exam Study Guide 2026: Pass Rates by Discipline
A transformer has 1000 turns on the primary and 100 turns on the secondary. If the primary voltage is 2400V, what is the secondary voltage?
FE exam pass rates vary by discipline (Civil, Mechanical, Electrical and Computer, Other). Free guide with NCEES study schedules and strategies to pass first try.
What is the per unit value of a 50 MVA transformer base when using a 100 MVA system base?
In a balanced three-phase delta-connected system, what is the relationship between line current (IL) and phase current (Iph)?
1.2 Units, Conversions, Engineering Constants & Fundamental Power Equations
What is the synchronous speed of a 4-pole, 60 Hz induction motor?
What is the purpose of a current transformer (CT)?
What is the power consumed by a 10 Ω resistor with 5A current flowing through it?
In a series RL circuit, what is the phase relationship between voltage and current?
1.3 Measurement & Metering Principles (Power, Energy, Power Factor)
What is the total apparent power (S) for a load consuming 800 kW with a power factor of 0.8?
What is the primary purpose of a circuit breaker in a power system?
What is the binary representation of decimal number 13?
Pe Electrical Computer
What is the impedance of a 10 mH inductor at 60 Hz?
1.4 Instrument Testing & Diagnostics (Insulation Megger & Ground Resistance)
What does the term "grounding" primarily refer to in power systems?
A three-phase, 480V system supplies a balanced wye-connected load with 10 Ω per phase. What is the total three-phase power?
Question · Medium
A 50 MVA, 13.8 kV/138 kV transformer has an impedance of 8% on its own base. What is the per unit impedance on a 100 MVA base?
A transmission line has a resistance of 0.5 Ω and reactance of 2 Ω. If 100A flows through the line, what is the voltage drop?
Chapter 2: Circuit Analysis Fundamentals
2.1 DC Circuit Laws, Network Theorems (Thevenin, Norton, Superposition) & Transients
A 3-phase induction motor draws 50A at 480V with a power factor of 0.85. What is the real power consumed?
In a balanced 3-phase system with phase sequence ABC, if Van = 277∠0° V, what is Vcn?
A synchronous generator has a synchronous reactance of 1.3 pu and is operating at 1.0 pu terminal voltage. If the excitation voltage Ef is 1.3 pu and the generator delivers 0.4 pu real power, what is the power angle δ?
What is the slip of a 4-pole, 60 Hz induction motor operating at 1755 RPM?
2.2 Single-Phase AC Steady-State Analysis, Phasors & Impedance
A 230 kV transmission line has a surge impedance of 400 Ω. What is the approximate SIL (Surge Impedance Loading)?
A load draws 100 kW with a lagging power factor of 0.8. What capacitor size is needed to correct the power factor to unity?
What is the Thevenin equivalent voltage for a circuit with a 24V source and two 4Ω resistors in series, with the output taken across one resistor?
A single-phase transformer has a turns ratio of 10:1, is rated 100 kVA, and has a secondary voltage of 240V. What is the full-load secondary current?
2.3 AC Power Relationships (Real, Reactive, Apparent Power & Power Factor Correction)
What is the resonant frequency of a series LC circuit with L = 10 mH and C = 100 μF?
A 500 MVA, 34.5 kV generator has a synchronous reactance of 1.2 pu. What is the actual reactance in ohms?
In a negative sequence protection scheme, what type of fault is being detected?
What is the Boolean expression for a 3-input AND gate with inputs A, B, and C?
2.4 Resonance, Frequency Response & Harmonic Distortion
A DC shunt motor operates at 1200 RPM with 240V applied and armature current of 50A. If the flux is reduced by 10% while keeping the load torque constant, what is the new speed?
What is the purpose of a pilot wire in differential protection?
A 3-phase system has a line-to-line voltage of 4160V. What is the phase voltage in a delta-connected system?
What is the efficiency of a transformer delivering 450 kW at 0.9 power factor if the total losses are 10 kW?
Loading more…
