Block IV Study Guide

Front

What are the two ways to connect three-phase alternators?

Back

Wye connection and delta connection.

Front

True or False: The magnetic field that escapes a transformer during operation is called leakage flux.

Back

True.

Front

How can the direction of the lines of force be determined when the direction of current flow is known?

Back

Use the left-hand rule.

Front

A dry cell is the most common type of ____ battery?

Back

Primary.

Front

True or False: AC current has replaced DC current in commercial power systems?

Back

True.

Front

What is a Wye connection in three-phase systems?

Back

A Wye connection is a method of connecting three-phase alternators where one end of each phase is connected to a common point, forming a 'Y' shape.

Front

What is a Delta connection in three-phase systems?

Back

A Delta connection is a method of connecting three-phase alternators where the ends of each phase are connected in a closed loop, forming a triangle.

Front

What is leakage flux in transformers?

Back

Leakage flux is the magnetic field that does not link with the secondary winding of a transformer, leading to energy losses.

Front

What is the left-hand rule used for in electromagnetism?

Back

The left-hand rule is used to determine the direction of force experienced by a conductor carrying current in a magnetic field.

Front

What type of battery is a dry cell classified as?

Back

A dry cell is classified as a primary battery.