Exam 2: Induction Motor Overview

Any part of the motor that rotates is mounted to the ____.

Rotors of induction motors are referred to as ____________________ rotors.

VARs stands for ____________________.

Describe what power factor is and what a poor power factor means.

____ is the measurement of how much work is accomplished in a specific amount of time, with time being the differentiating focus.

The highest current draw is at locked-rotor (zero RPM) speed for NEMA Design B motors, and does not start to drop off significantly until the rotor reaches ____ full-load speed.

The torque produced at full load speed that gives the rated horsepower output of the motor is called ____ torque.

Molten ____________________ is poured through the laminations into the cavities designed to form rotor bars.

The ____ holds all the parts of a motor together.

What is the label designation for the leads of the stator brought out to the conduit box?

The maximum torque the motor can develop, after having reached full operating speed at the rated voltage and frequency, before stalling (experiencing an abrupt drop in speed), is called ____ torque.

____ torque is a term used to describe when the rotor turns in jerks or increments rather than a smooth turning motion.

____ is a turning force that determines what mechanical work may be performed.

The most common general purpose NEMA motor is ____.

____________________ is defined as the capacity, or potential, to perform work.

Resistive loads are said to be ____________________, because voltage and current are always the same polarity, and are being used in the same proportion for all time points along the horizontal axis of wave forms.

The torque that the motor develops at zero speed (rotor not turning) when the rated voltage and frequency are applied is called ____ torque.

The minimum torque developed from locked-rotor to breakdown torque is called ____ torque.

What are the two reasons why there is a thin layer of insulation on magnet wire?

When electrical energy is applied to a device that can convert it to another form of energy, such as an electric motor converting it to mechanical energy, it performs ____.