What indication occurs when using a growler if there is a short between armature segments?

When using a growler to test an armature, a short between segments typically leads to a condition known as "chattering." This occurs because the growler produces an alternating magnetic field that can create an unequal magnetic pull on the armature when there is a short. The result is that the armature does not spin smoothly; instead, it experiences erratic motion, which manifests as a chattering effect. This chattering is an indication of shorted segments within the armature winding, as the normal functioning of the motor is disrupted.

It’s important to note that the other options describe effects that could occur in different circumstances. For example, while excessive heat can be a concern in motors with other forms of damage, chattering is a direct and observable symptom of the specific electrical issue of shorted segments when testing with a growler. Similarly, increased noise or failure to operate would suggest issues but are not as directly indicative of shorted armature segments during growler testing.