Question 1

What are two advantages to a single-phase, three-wire system?

Accepted Answer

1. The system provides two different vol...

Question 2

Magnetic materials contain tiny magnetic structures in their molecular material, known as ____________________.

Accepted Answer

The answer of Magnetic materials contain tiny magnetic structures in...

Question 3

There is no voltage loss in high-voltage distribution circuits.

Accepted Answer

A) True 
 B)False  False

Question 4

The single-phase transformer is a simple alternating-current device.

Accepted Answer

A) True 
 B)False

Question 5

Describe the core-and-coil assembly.

Accepted Answer

The core-and-coil assembly is placed in a pressed steel tank and is completely covered with an insulating oil. This insulating oil removes heat from the core and the coil windings and insulates the windings from the core and the transformer case. The core-and-coil assembly for a typical transformer contains channels or ducts. These ducts permit the oil to circulate and remove the heat. As the oil gains heat, its density decreases and it rises. As it rises and circulates in the transformer, it contacts the tank walls and the heat is transferred from the oil to the tank walls. The walls are cooled by air circulation. The specific gravity of the oil increases as it loses heat. As a result, the oil flows down to the bottom of the tank and again circulates up through the coil ducts to repeat the cooling process.

Question 6

In a(n) ____________________ test, the high-voltage winding is used as the primary and the low-voltage winding is short-circuited.

Accepted Answer

The answer of In a(n) ____________________ test, the high-voltage winding...

Question 7

List the three factors that limit the amount of inrush current in the primary transformer.

Accepted Answer

1. The amount of applied voltage.
2. The...

Question 8

The ____________________ may be described as an alternating-current device that transfers energy from one ac circuit to another ac circuit.

Accepted Answer

The answer of The ____________________ may be described as an...

Question 9

A transformer does not require any moving parts to transfer energy.

Accepted Answer

A) True 
 B)False

Question 10

A stepdown transformer delivers energy from the output winding at a higher voltage than at the input.

Accepted Answer

A) True 
 B)False

Question 11

How is transformer impedance determined?

Accepted Answer

Transformer impedanc...

Question 12

Describe a transformer, in its simplest form.

Accepted Answer

The transformer is a stationary device. ...

Question 13

The transformer capacity is rated in kilovolt-amperes, not in kilowatts.

Accepted Answer

A) True 
 B)False

Question 14

A(n) ____________________ receives energy at the input winding at one voltage and delivers energy from the output winding at one voltage.

Accepted Answer

stepdown t...

Question 15

The primary current at no load is called the ____________________.

Accepted Answer

exciting current

Exam 13: Transformers

What are two advantages to a single-phase, three-wire system?

Correct Answer
verified
1. The system provides two different vol...
View Answer

Magnetic materials contain tiny magnetic structures in their molecular material, known as ____________________.

Correct Answer
verified

There is no voltage loss in high-voltage distribution circuits.

Correct Answer
verified
False

The single-phase transformer is a simple alternating-current device.

Correct Answer
verified

Describe the core-and-coil assembly.

In a(n) ____________________ test, the high-voltage winding is used as the primary and the low-voltage winding is short-circuited.

Correct Answer
verified

List the three factors that limit the amount of inrush current in the primary transformer.

Correct Answer
verified
1. The amount of applied voltage.
2. The...
View Answer

The ____________________ may be described as an alternating-current device that transfers energy from one ac circuit to another ac circuit.

Correct Answer
verified

A transformer does not require any moving parts to transfer energy.

Correct Answer
verified

A stepdown transformer delivers energy from the output winding at a higher voltage than at the input.

Correct Answer
verified

How is transformer impedance determined?

Correct Answer
verified
Transformer impedanc...
View Answer

Describe a transformer, in its simplest form.

Correct Answer
verified
The transformer is a stationary device. ...
View Answer

The transformer capacity is rated in kilovolt-amperes, not in kilowatts.

Correct Answer
verified

A(n) ____________________ receives energy at the input winding at one voltage and delivers energy from the output winding at one voltage.

Correct Answer
verified
stepdown t...
View Answer

The primary current at no load is called the ____________________.

Correct Answer
verified
exciting current

Exam 13: Transformers

What are two advantages to a single-phase, three-wire system?

Correct Answerverified1. The system provides two different vol...View AnswerShow Answer

Magnetic materials contain tiny magnetic structures in their molecular material, known as ____________________.

Correct AnswerverifiedShow Answer

There is no voltage loss in high-voltage distribution circuits.

Correct AnswerverifiedFalse

The single-phase transformer is a simple alternating-current device.

Correct AnswerverifiedShow Answer

Describe the core-and-coil assembly.

In a(n) ____________________ test, the high-voltage winding is used as the primary and the low-voltage winding is short-circuited.

Correct AnswerverifiedShow Answer

List the three factors that limit the amount of inrush current in the primary transformer.

Correct Answerverified1. The amount of applied voltage.2. The...View AnswerShow Answer

The ____________________ may be described as an alternating-current device that transfers energy from one ac circuit to another ac circuit.

Correct AnswerverifiedShow Answer

A transformer does not require any moving parts to transfer energy.

Correct AnswerverifiedShow Answer

A stepdown transformer delivers energy from the output winding at a higher voltage than at the input.

Correct AnswerverifiedShow Answer

How is transformer impedance determined?

Correct AnswerverifiedTransformer impedanc...View AnswerShow Answer

Describe a transformer, in its simplest form.

Correct AnswerverifiedThe transformer is a stationary device. ...View AnswerShow Answer

The transformer capacity is rated in kilovolt-amperes, not in kilowatts.

Correct AnswerverifiedShow Answer

A(n) ____________________ receives energy at the input winding at one voltage and delivers energy from the output winding at one voltage.

Correct Answerverifiedstepdown t...View AnswerShow Answer

The primary current at no load is called the ____________________.

Correct Answerverifiedexciting current

Correct Answer
verified
1. The system provides two different vol...
View Answer

Correct Answer
verified

Correct Answer
verified
False

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
1. The amount of applied voltage.
2. The...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Transformer impedanc...
View Answer

Correct Answer
verified
The transformer is a stationary device. ...
View Answer

Correct Answer
verified

Correct Answer
verified
stepdown t...
View Answer

Correct Answer
verified
exciting current