Maintenance Technician Practice Test 2025 - Free Maintenance Technician Practice Questions and Prep Guide

A shaded pole induction motor is a type of single-phase AC motor that operates on the principle of electromagnetic induction. This motor is characterized by its simple construction and ease of use in low-power applications.

The first point about needing an external starting device refers to the fact that while shaded pole motors do not require external components for starting, their design allows them to start under certain conditions without additional starting mechanisms, making them easier to use.

The notion of being highly effective is more nuanced, as shaded pole motors typically have lower efficiency and performance compared to other motor types. They are generally used for small applications, like fans or small household appliances, where their relatively low efficiency is acceptable due to the simplicity and cost-effectiveness of their design.

The characteristic of rotating in only one direction is accurate since shaded pole motors inherently do not have a defined mechanism for reversing direction, as the shading coils create a rotating magnetic field that can only sustain rotation in one direction.

Given these points, the choice indicating that all these statements about shaded pole induction motors are true effectively captures the essence of their functionality and limitations, highlighting their operational characteristics in a straightforward manner.