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Exam 17: Dc Motors

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Question 1

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Insulation tests are a type of maintenance task that should be performed on a regular basis.

A) True
B) False

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Question 2

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In some types of DC motor arrangements, a flywheel assists the motor in driving the load.

A) True
B) False

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In a brushless DC motor, a special circuit is used to perform the commutation of the applied DC.

What is an application of a phototransistor?

Because the armature of a DC motor is wound in much the same way as a DC generator, the current from the supply must divide and flow through three or more paths.

Which type of motor has the ability to control the rotation to less than 1 degree?

Stepping motors that are designed with non-permanent-magnet rotors are referred to as ____ stepping motors.

The operation of a motor depends upon the interaction between ____ magnetic fields.

An instrument designed to measure rotating torque is called a(n) ____ .

____ motors are designed to be used for jobs requiring minimum torque.

A(n) ____ is a type of rotating switch.

When using the right hand rule for a motor, the thumb points in the direction of ____.

The starting torque of a shunt motor is about ____ times the full-load torque.

A good commutator will have a very dark brown film of oxide.

A(n) ____ motor has a very high starting torque.