Elevator Mechanic Practice Exam 2026 - Free Elevator Mechanic Practice Questions and Study Guide

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What can help reduce the noise caused by an older SCR drive powered elevator in the building power lines?

Capacitor bank

A capacitor bank can help reduce the noise caused by an older SCR drive powered elevator in the building power lines. This is because the capacitor bank is used to filter out and smooth electrical currents, which can reduce the noise that is present in the building's power lines.

B Isolation transformer, C: Surge protector, and D: Voltage regulator are all incorrect because they do not directly address the noise issue caused by an older SCR drive powered elevator. An isolation transformer is used to protect sensitive electrical devices from power surges, a surge protector is used to divert excess voltage from electrical devices, and a voltage regulator is used to maintain a steady voltage level in electrical networks. While these options may help with other issues related to electricity, they do not specifically address reducing noise in the building power lines.

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Isolation transformer

Surge protector

Voltage regulator

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