Maintenance Technician 2026 Complete Practice Test

Question: 1 / 400

What happens when an AC solenoid is operated without adequate current?

It will hum loudly

It will not actuate

When an AC solenoid is operated without adequate current, it will not be able to generate the necessary magnetic field to actuate or move its core. Solenoids rely on electromagnetic principles, where sufficient current passing through the coil creates a magnetic field that moves the plunger. If the current is too low, the magnetic field produced will be insufficient to overcome the mechanical resistance or spring action within the solenoid, resulting in a failure to actuate.

While a solenoid may hum when inadequate current is applied due to the alternating current causing vibration, the critical factor here is that without the proper amount of current, the solenoid simply will not function as intended. The options related to excessive heat or merely creating a magnetic field do not apply, as those activities would also require adequate current to occur effectively.

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It will heat excessively

It will create a magnetic field

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