Elevator Mechanic Practice Exam 2025 - Free Elevator Mechanic Practice Questions and Study Guide

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How would you connect an ohm-meter to check load resistance?

Black to common, Red to V ohm, switch at Ohm

Connecting an ohm-meter to check load resistance requires establishing a proper measurement setup. The correct approach involves connecting the black probe to the common terminal and the red probe to the V-ohm terminal. The switch should be set to the ohm setting to correctly measure resistance.

Using this configuration allows the ohm-meter to complete the circuit necessary for measuring resistance effectively, ensuring accurate readings. Setting to "Ohm" is crucial because it enables the meter to apply a small voltage across the load and measure the current to calculate resistance according to Ohm's law.

The other options involve incorrect connections or settings that do not align with standard practices for measuring resistance. They either focus on current measurement or incorrect terminal assignments that wouldn't yield a valid resistance reading.

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Black to live, Red to ground, switch at V

Red to common, Black to V ohm, switch at Amp

Red to live, Black to ground, switch at mA

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