Question 1

Direct water cooling of rotor winding presents

Accepted Answer

A) no mechanical difficulties 
B) lesser mechanical difficulties 
C) greater mechanical difficulties 
D) none of the above 
A) no mechanical difficulties 
B) lesser mechanical difficulties 
C) greater mechanical difficulties 
D) none of the above

Question 2

With direct water cooling it is possible to have ratings of about

Accepted Answer

A) 200 MW 
B) 300 MW 
C) 400 MW 
D) 600 MW 
A) 200 MW 
B) 300 MW 
C) 400 MW 
D) 600 MW

Question 3

The slot leakage can be calculated by making which of the following assumptions ?

Accepted Answer

A) The current in the slot conductors is uniformly distributed over their cross-section 
B) The leakage path is straight across the slot and around the iron at the bottom 
C) The permanence of air paths is only considered. The reluctance of iron paths is assumed as zero 
D) All of the above 
A) The current in the slot conductors is uniformly distributed over their cross-section 
B) The leakage path is straight across the slot and around the iron at the bottom 
C) The permanence of air paths is only considered. The reluctance of iron paths is assumed as zero 
D) All of the above

Question 4

Which of the following methods is most accurate ?

Accepted Answer

A) Equivalent current method 
B) Equivalent power method 
C) Equivalent torque method 
D) Method of average losses 
A) Equivalent current method 
B) Equivalent power method 
C) Equivalent torque method 
D) Method of average losses

Question 5

Machines cooled by direct cooling method may be called

Accepted Answer

A) "supercharged" 
B) "inner cooled" 
C) "conductor cooled" 
D) any of the above 
A) "supercharged" 
B) "inner cooled" 
C) "conductor cooled" 
D) any of the above

Direct water cooling of rotor winding presents

With direct water cooling it is possible to have ratings of about

The slot leakage can be calculated by making which of the following assumptions ?

Which of the following methods is most accurate ?

Machines cooled by direct cooling method may be called

Design Considerations and Materials for Electrical Machines

Transformer Design and Electromagnets

Design and Operation of DC Machines

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Exam 2: Cooling and Electromagnets for Machines

Direct water cooling of rotor winding presents

With direct water cooling it is possible to have ratings of about

The slot leakage can be calculated by making which of the following assumptions ?

Which of the following methods is most accurate ?

Machines cooled by direct cooling method may be called

Design Considerations and Materials for Electrical Machines

Transformer Design and Electromagnets

Design and Operation of DC Machines

Filters