Question 1

In D.C. generators, lap winding is used for

Accepted Answer

A) high voltage, high current 
B) low voltage, high current 
C) high voltage, low current 
D) low voltage, low current 
A) high voltage, high current 
B) low voltage, high current 
C) high voltage, low current 
D) low voltage, low current

Question 2

Which of the following statement about D.C. generators is false ?

Accepted Answer

A) Compensating winding in a D.C. machine helps in commutation 
B) In a D. C. generator interpoles winding is connected in series with the armature winding 
C) Back pitch and front pitch are both odd and approximately equal to the pole pitch 
D) Equilizing bus bars are used with parallel running of D.C. shunt generators 
A) Compensating winding in a D.C. machine helps in commutation 
B) In a D. C. generator interpoles winding is connected in series with the armature winding 
C) Back pitch and front pitch are both odd and approximately equal to the pole pitch 
D) Equilizing bus bars are used with parallel running of D.C. shunt generators

Question 3

Compensating windings are used in D.C. generators

Accepted Answer

A) mainly to reduce the eddy currents by providing local short-circuits 
B) to provide path for the circulation of cooling air 
C) to neutralise the cross-magnetising effect of the armature reaction 
D) none of the above 
A) mainly to reduce the eddy currents by providing local short-circuits 
B) to provide path for the circulation of cooling air 
C) to neutralise the cross-magnetising effect of the armature reaction 
D) none of the above

Question 4

In case of D.C. machine winding, number of commutator segments is equal to

Accepted Answer

A) number of armature coils 
B) number of armature coil sides 
C) number of armature conductors 
D) number of armature turns 
A) number of armature coils 
B) number of armature coil sides 
C) number of armature conductors 
D) number of armature turns

Question 5

Which of the following components of a D.C, generator plays vital role for providing direct current of a D.C. generator ?

Accepted Answer

A) Dummy coils 
B) Commutator 
C) Eye bolt 
D) Equilizer rings 
A) Dummy coils 
B) Commutator 
C) Eye bolt 
D) Equilizer rings

In D.C. generators, lap winding is used for

Which of the following statement about D.C. generators is false ?

Compensating windings are used in D.C. generators

In case of D.C. machine winding, number of commutator segments is equal to

Which of the following components of a D.C, generator plays vital role for providing direct current of a D.C. generator ?

Transformer Fundamentals and Operation

Transformer Technology and Design

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

Transformers: Efficiency, Design, and Testing

Transformers: Voltage Regulation, Efficiency, and Protection

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 Generator Operation and Construction

D.C Generators

Direct Current Generators and Parallel Operation

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Exam 12: D.C Generators and Commutators

In D.C. generators, lap winding is used for

Which of the following statement about D.C. generators is false ?

Compensating windings are used in D.C. generators

In case of D.C. machine winding, number of commutator segments is equal to

Which of the following components of a D.C, generator plays vital role for providing direct current of a D.C. generator ?

Transformer Fundamentals and Operation

Transformer Technology and Design

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

Transformers: Efficiency, Design, and Testing

Transformers: Voltage Regulation, Efficiency, and Protection

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 Generator Operation and Construction

D.C Generators

Direct Current Generators and Parallel Operation

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