Design of Electrical Machines Mock Test 4

10%

Question 1 of 10

1. What class does the plastic foil baked with polyamide fibres belong to?

Question 1 of 10

Question 2 of 10

2. The increase in number of poles, the dispersion coefficient increases and this gives a low power factor.

true

false

Question 2 of 10

Question 3 of 10

3. The pulsation losses are caused by the direct axis pulsation of magnetic flux.

true

false

Question 3 of 10

Question 4 of 10

4. The length of the mean turn of the winding is smallest with circular poles.

false

true

Question 4 of 10

Question 5 of 10

5. The no load power factor is the ratio of full load current to no load current.

true

false

Question 5 of 10

Question 6 of 10

6. What type of winding is made use of for the small motors?

cross windings

mush windings

rounded windings

interconnected windings

Question 6 of 10

Question 7 of 10

7. How much does the addition iron losses relate with the supplied power?

additional iron losses = 0.9% of supplied power

additional iron losses = 0.8% of supplied power

additional iron losses = 0.5% of supplied power

additional iron losses = 0.6% of supplied power

Question 7 of 10

Question 8 of 10

8. Which among the following are the applications of synchronous motors?

compressors, fans, blowers

fans

blowers

compressors

Question 8 of 10

Question 9 of 10

9. What is the rating of the turbo-alternators?

750 MW

700 MW

20 MW

1000 MW

Question 9 of 10

Question 10 of 10

10. What is the relation between the dispersion coefficient and maximum power factor?

dispersion coefficient is indirectly proportional to the square of the power factor

dispersion coefficient is directly proportional to the square of the power factor

dispersion coefficient is directly proportional to the power factor

dispersion coefficient is indirectly proportional to the power factor

Question 10 of 10