Design of Electrical Machines Mock Test 9

10%

Question 1 of 10

1. What is the first step in the design of the field regulators for dc machines?

calculation of the total field circuit resistance

calculation of the resistance of section

resistance to be inserted

calculation of the field circuit resistance

Question 1 of 10

Question 2 of 10

2. What is the output equation of a single phase induction motor developed by P.H Tricky?

diameter² * length = 16.5 * H.P / output coefficient * frequency constant * motor type constants * rpm * 10⁶

diameter² * length = 16.5 * H.P * output coefficient / frequency constant * motor type constants * rpm * 10⁶

diameter² * length = 16.5 * H.P * output coefficient * frequency constant * motor type constants /rpm * 10⁶

diameter² * length = 16.5 / H.P * output coefficient * frequency constant * motor type constants * rpm * 10⁶

Question 2 of 10

Question 3 of 10

3. What is the product of the ratio of the current and the useful flux per pole?

product of ratio of current and useful per pole = (useful flux per pole due to upper limit current - upper limit current) / (useful flux per pole due to lower limit current - lower limit current)

product of ratio of current and useful per pole = (useful flux per pole due to upper limit current + upper limit current) / (useful flux per pole due to lower limit current + lower limit current)

product of ratio of current and useful per pole = (useful flux per pole due to upper limit current * upper limit current) / (useful flux per pole due to lower limit current * lower limit current)

product of ratio of current and useful per pole = (useful flux per pole due to upper limit current * lower limit current) / (useful flux per pole due to lower limit current * upper limit current)

Question 3 of 10

Question 4 of 10

4. What is the range of the transformation ratio in the pole machines?

0.1-0.25

0.1-0.2

0.05-0.1

0.3-0.4

Question 4 of 10

Question 5 of 10

5. How many factors are present in the operating characteristics?

Question 5 of 10

Question 6 of 10

6. The magnetizing reactance is directly proportional to the saturation factor.

false

true

Question 6 of 10

Question 7 of 10

7. What factor is the core length made equal to in theoretical conditions?

pole length

pole proportion

pole length

number of poles

Question 7 of 10

Question 8 of 10

8. How many steps are present in the calculation of the determination of main dimensions?

Question 8 of 10

Question 9 of 10

9. What is the angle at which the electromagnetic torque is maximum?

90°

30°

60°

45°

Question 9 of 10

Question 10 of 10

10. What happens in the dc shunt motor when the notching process occurs?

current remains constant

flux remains constant

speed remains constant

voltage remains constant

Question 10 of 10