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Electrical calculations practice test

Ohm's law, load calculations, branch circuits, conductor sizing, and voltage drop basics.

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What this page targets

Use this page to drill Electrical calculations practice test concepts before opening the full sample set. Start with the focus below, answer a few questions, then review the explanation for each miss.

Practice focus: Ohm's law, load calculations, branch circuits, conductor sizing, and voltage drop basics.

Sample 1

A 120V circuit carries 10A. What is the apparent power?

  1. 1,200 VA
  2. 12 VA
  3. 120 VA
  4. 12,000 VA

Answer: A. For a basic single-phase calculation, volts times amps equals volt-amperes.

Sample 2

Before applying a value from an NEC table, what should be verified?

  1. Only the article number without reading its scope
  2. The table's scope, headings, units, notes, and any applicable exceptions
  3. A value remembered from a different code edition
  4. Only the largest value shown in the table

Answer: B. A table value is valid only when its scope, row, column, units, notes, and exceptions match the installation.

Sample 3

What is a branch circuit?

  1. Conductors between service equipment and the final branch-circuit overcurrent device
  2. Utility conductors delivering power to the service point
  3. The circuit conductors between the final overcurrent device and the outlets or loads served
  4. A grounding electrode conductor connecting the system to earth

Answer: C. A branch circuit is the final circuit portion between its overcurrent device and the outlets or utilization equipment it supplies.

Sample 4

What is the basic formula for power in a simple DC circuit?

  1. P = V + I
  2. P = V / I only
  3. P = I - V
  4. P = V x I

Answer: D. Power can be calculated as voltage times current in basic circuit calculations.

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 Answer

What is Ohm's law and power basics on the Journeyman Electrician Practice Test?

Definition answer for Journeyman Electrician Practice Test: Ohm's law and power basics. Includes a plain-English explanation, study move, and related practice links.

 Answer

Why does Ohm's law and power basics matter for the Journeyman Electrician Practice Test?

Why it matters answer for Journeyman Electrician Practice Test: Ohm's law and power basics. Includes a plain-English explanation, study move, and related practice links.

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Electrical calculations practice test review with sample questions, answer explanations, and a link into Journeyman Electrician Practice Test. The site includes practice paths for EPA 608, CDL, IBEW aptitude, journeyman electrician, CWI welding inspector, NASCLA, NCCCO, NHIE, and plumbing license exams.

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