M7: Review Questions (26307-20)

Front

The three basic types of iron core transformers are _____?

Back

closed core, open core, and shell

Front

If one of the transformers is damaged in a delta system, the configuration that may be used to temporarily carry the load is called a(n) _____

Back

open delta configuration

Front

What causes voltage to be induced in a transformer?

Back

Mutual induction

Front

The main purpose of a transformer is to _____

Back

change the output voltage

Front

When the field from one coil cuts through the turns of a second coil, _____

Back

voltage will be generated

Front

The meter used to measure insulation resistance is called a(n) _____

Back

megger

Front

Most control transformers are _____: dry-type, step-down; oil-filled, step-up; dry-type, step-up; oil-filled, step-down.

Back

dry-type, step-down

Front

The three parts of a basic transformer are the _____?

Back

primary winding, secondary winding, and core

Front

The power factor of a circuit can be improved by increasing the _____?

Back

capacitance

Front

In a transformer with a turns ratio of 5:1 (the primary has five times the number of turns as the secondary), what will be the voltage on the secondary if the primary voltage is 120V?

Back

24V