Lesson 2 Assessment

Voltage Diagnostics & Meter Probe Placement

A passing grade of 80% or higher is required to advance to Lesson 3.

Additional Training Resource for This Lesson:

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TRANSFORMER120 / 24 V24 VAC SWITCH ABCDEF HOTCOMMON
VOLTAGE READING
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● Red: A   ● Black: F
LESSON 2 • QUESTION 1

Measure Across the Closed Switch

Using the voltage lab: Turn the power ON, CLOSE the switch, and place your meter probes across the closed switch.

What voltage do you measure, and what does that reading tell you?

A. 0 V — There is no power in the circuit.
B. 0 V — Both sides of the switch are at the same electrical potential.
C. 24 V — The closed switch is dropping the full supply voltage.
D. 24 V — The motor is receiving the full supply voltage.

Explainer Video

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