CUSP T&D Exam 2026 Study Guide | Complete Question Bank with Verified Answers & Detailed Rationales for Transmission & Distribution Certification

CUSP T&D Exam 2026 Study Guide |
Complete Question Bank with Verified
Answers & Detailed Rationales for
Transmission & Distribution Certification
• This study guide contains 200 expertly curated multiple-choice questions covering
the full CUSP T&D 2026 exam syllabus, each with verified answers and detailed
EXPERT RATIONALE to reinforce understanding.

• Use this material by reading each question carefully, selecting your answer before
checking the highlighted correct option, and studying the EXPERT RATIONALE to
solidify the concept before moving on.



CUSP T&D EXAM 2026 — COMPLETE QUESTION BANK Transmission &
Distribution Certification



SECTION 1: ELECTRICAL FUNDAMENTALS



1. What is the unit of electrical resistance?

A. Ampere

B. Volt

C. Watt

D. Ohm

E. Farad

EXPERT RATIONALE: The Ohm (Ω) is the SI unit of electrical resistance, named after
Georg Simon Ohm. It measures the opposition to current flow in a conductor.



2. Ohm's Law states that voltage equals:

A. Current divided by resistance

,B. Power multiplied by current

C. Current multiplied by resistance

D. Resistance divided by current

E. Power divided by resistance

EXPERT RATIONALE: Ohm's Law is expressed as V = I × R, where V is voltage in
volts, I is current in amperes, and R is resistance in ohms.



3. Which of the following is the correct formula for electrical power?

A. P = V / I

B. P = I / R

C. P = V × I

D. P = R × V

E. P = V² / I

EXPERT RATIONALE: Power (P) in watts equals voltage (V) in volts multiplied by
current (I) in amperes. This is the fundamental power formula used in AC and DC
circuit analysis.



4. In a series circuit, which quantity remains constant throughout?

A. Voltage

B. Power

C. Current

D. Resistance

E. Impedance

,EXPERT RATIONALE: In a series circuit, the same current flows through every
component. Voltage divides across each element, but current remains the same at
every point.



5. What is the total resistance of two 10-ohm resistors connected in parallel?

A. 20 ohms

B. 10 ohms

C. 5 ohms

D. 2.5 ohms

E. 0.2 ohms

EXPERT RATIONALE: For two equal resistors in parallel, total resistance = R/2 =
10/2 = 5 ohms. The formula is 1/Rt = 1/R1 + 1/R2.



6. Which type of current reverses direction periodically?

A. Direct current

B. Pulsating current

C. Alternating current

D. Static current

E. Transient current

EXPERT RATIONALE: Alternating current (AC) reverses direction at regular intervals,
typically at 60 Hz in North America, meaning it changes direction 120 times per
second.



7. What does the term "frequency" refer to in AC systems?

A. The peak voltage level

, B. The average power consumed

C. The number of complete cycles per second

D. The total current in the circuit

E. The resistance of the conductor

EXPERT RATIONALE: Frequency is measured in Hertz (Hz) and represents the
number of complete cycles occurring each second. North American systems
operate at 60 Hz.



8. What instrument is used to measure electrical current?

A. Voltmeter

B. Ohmmeter

C. Ammeter

D. Wattmeter

E. Megohmmeter

EXPERT RATIONALE: An ammeter measures current flow in amperes. It is
connected in series with the circuit so all the current flows through it.



9. In AC circuits, what is the term for the combined opposition to current flow
from resistance and reactance?

A. Conductance

B. Susceptance

C. Impedance

D. Admittance

E. Reluctance