Question 1072 of 844 · Washington 01 Journey Level Electrician Exam
Why must an ohmmeter be used only on a de-energized circuit?
Exactly one answer is correct.
You got of questions right. Here on the question pages nobody remembers which ones you got wrong. The trainer saves your progress and asks the mistakes again until they stick.
Or free: the 10 questions most people get wrong
Show solution
Correct answer to question 1072
- D: It uses its own internal battery, and line voltage can damage it and give false readings
Explanation
An ohmmeter supplies its own small test current from an internal battery. Connecting it to an energized circuit gives false readings and can damage the meter.
More questions: Definitions, Theory and Plans
- 1073Which instrument directly measures true power in watts?
- 1074A floor plan is drawn at a scale of 1/4 inch = 1 foot. A conduit run measures 6 inches on the drawing. How long is the actual run?
- 1075On an electrical floor plan, a small circle with two short parallel lines through it typically represents:
- 1076On an electrical plan, the letter S with a small subscript 3 next to it indicates:
- 1077On a branch circuit layout, a line ending in an arrowhead with a circuit number beside it means:
- 1078On a lighting plan, a curved dashed line drawn from a switch to a luminaire shows: