Question 1

A transformer can have regulation closer to zero

Accepted Answer

A) on full-load 
B) on overload 
C) on leading power factor 
D) on zero power factor 
A) on full-load 
B) on overload 
C) on leading power factor 
D) on zero power factor

Question 2

The secondary of a current transformer is always short-circuited underoperating conditions because it

Accepted Answer

A) avoids core saturation and high voltage induction 
B) is safe to human beings 
C) protects the primary circuit 
D) none of the above 
A) avoids core saturation and high voltage induction 
B) is safe to human beings 
C) protects the primary circuit 
D) none of the above

Question 3

The efficiency of two identical transformers under load conditionscan be determined by

Accepted Answer

A) short-circuit test 
B) back-to-back test 
C) open circuit test 
D) All of the above 
A) short-circuit test 
B) back-to-back test 
C) open circuit test 
D) All of the above

Question 4

Which of the following is not the standard voltage for power supply in India ?

Accepted Answer

A) llkV 
B) 33kV 
C) 66 kV 
D) 122 kV 
A) llkV 
B) 33kV 
C) 66 kV 
D) 122 kV

Question 5

For given applied voltage, with the increase in frequency of the applied voltage

Accepted Answer

A) eddy current loss will decrease 
B) eddy current loss will increase 
C) eddy current loss will remain unchanged 
D) none of the above 
A) eddy current loss will decrease 
B) eddy current loss will increase 
C) eddy current loss will remain unchanged 
D) none of the above

A transformer can have regulation closer to zero

The secondary of a current transformer is always short-circuited underoperating conditions because it

The efficiency of two identical transformers under load conditionscan be determined by

Which of the following is not the standard voltage for power supply in India ?

For given applied voltage, with the increase in frequency of the applied voltage

Transformer Fundamentals and Operation

Transformer Technology and Design

Transformer: Resistance, Oil, Relays, Harmonics, and Core Properties

Transformers: Efficiency, Design, and Testing

Transformer and D.C Motor

D.C Motors and Starters

D.C Motors and Speed Control

D.C Motors and Controls

D.C Motors and Generators

D.C Machine and Generator Laminations, Commutation, and Components

D.C Generators and Commutators

D.C Generator Operation and Construction

D.C Generators

Direct Current Generators and Parallel Operation

Filters

Exam 5: Transformers: Voltage Regulation, Efficiency, and Protection

A transformer can have regulation closer to zero

The secondary of a current transformer is always short-circuited underoperating conditions because it

The efficiency of two identical transformers under load conditionscan be determined by

Which of the following is not the standard voltage for power supply in India ?

For given applied voltage, with the increase in frequency of the applied voltage

Transformer Fundamentals and Operation

Transformer Technology and Design

Transformer: Resistance, Oil, Relays, Harmonics, and Core Properties

Transformers: Efficiency, Design, and Testing

Transformer and D.C Motor

D.C Motors and Starters

D.C Motors and Speed Control

D.C Motors and Controls

D.C Motors and Generators

D.C Machine and Generator Laminations, Commutation, and Components

D.C Generators and Commutators

D.C Generator Operation and Construction

D.C Generators

Direct Current Generators and Parallel Operation

Filters