Design of Electrical Machines Mock Test 10

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Question 1 of 10

1. What are the factors the permeance depends upon in the zigzag leakage?

relative position of stator and rotor

relative position of stator

stored energy at any position

relative position of rotor

Question 1 of 10

Question 2 of 10

2. What is the assumption made in the calculation of the specific permeance?

current is kept constant

speed is kept constant

mmf is kept constant

voltage is kept constant

Question 2 of 10

Question 3 of 10

3. What is one of the major aspects in the modern day design?

design machines to provide a single system

design machine to form multiple group with interconnection

design machines to provided integrated systems

design machines to form a group

Question 3 of 10

Question 4 of 10

4. What happens in the rotating electrical machine?

the rotor slots are rotating

armatures are slotted and results in the movement of rotor

the rotor remains stationary

armatures are slotted

Question 4 of 10

Question 5 of 10

5. What is the formula for the zigzag permeance?

zigzag permeance = average width of the rotor tooth * (1/2 * mmf per slot²)

zigzag permeance = 1/average width of the rotor tooth *(1/2 * mmf per slot²)

zigzag permeance = average width of the rotor tooth *(1/2 / mmf per slot²)

zigzag permeance = average width of the rotor tooth / (1/2 * mmf per slot²)

Question 5 of 10

Question 6 of 10

6. What is the relation of the specific electric loading and the diameter?

specific electric loading is indirectly proportional to the diameter

specific electric loading is indirectly proportional to the square of the diameter

specific electric loading is directly proportional to the square of the diameter

specific electric loading is directly proportional to the diameter

Question 6 of 10

Question 7 of 10

7. What is the relationship between power factor, current and conductor sizes?

poor power factor leads to small amount of current and hence high conductor sizes should be used

poor power factor leads to high amount of current and hence high conductor sizes should be used

high factor leads to small amount of current and hence high conductor sizes should be used

high power factor leads to small amount of current and hence small conductor sizes should be used

Question 7 of 10

Question 8 of 10

8. What is the relation between the output and the flux density?

flux density is indirectly proportional to the square of the output

flux density is directly proportional to the square of the output

flux density is directly proportional to the output

flux density is indirectly proportional to the output

Question 8 of 10

Question 9 of 10

9. How many parts are used in the design of the machines?

Question 9 of 10

Question 10 of 10

10. What is specific permeance?

specific permeance is the permeance per unit length

specific permeance is the permeance per unit pole

specific permeance is ratio of permeance of unit length and depth of field

specific permeance is product of permeance of unit length and depth of field

Question 10 of 10