Electric Drives Mock Test 6

10%

Question 1 of 10

1. Which of the following are the classes of insulating material in electrical machines?

Γ, A, E, F, H, C

Γ, E, B, F, H, C

A, E, B, F, H, C

Γ, A, E, F, C

Question 1 of 10

Question 2 of 10

2. Full form of PWM.

Pulse width modulation

Power width modulation

Pulse wisdom mode

Pulse run modulation

Question 2 of 10

Question 3 of 10

3. The capacity of the Crane is expressed in terms of tonnes.

False

True

Question 3 of 10

Question 4 of 10

4. 1800 second rated motors are used for __________

Intermittent duty cranes

Medium duty cranes

Heavy duty cranes

Light duty cranes

Question 4 of 10

Question 5 of 10

5. Single phase induction motor is self-starting.

True

False

Question 5 of 10

Question 6 of 10

6. Choose the correct relationship in Star connection with the positive sequence.

V_L=V_p

I_L=√3I_p

V_L=√2V_p

V_L=√3V_p

Question 6 of 10

Question 7 of 10

7. Power input to an induction motor is given by _________

V_pI_pcosΦ

3V_pI_pcosΦ

5V_pI_pcosΦ

2V_pI_pcosΦ

Question 7 of 10

Question 8 of 10

8. Which type of force phenomenon is used in Sugar mills?

Nuclear forces

Centrifugal force

Electrostatic force

Centripetal force

Question 8 of 10

Question 9 of 10

9. Calculate the value of the angular acceleration of the machine using the given data: J = .541 kg-m², load torque = 10 N-m, motor torque = 2 N-m.

51 rad/s²

45 rad/s²

The machine will fail to start

30 rad/s²

Question 9 of 10

Question 10 of 10

10. The use of the capacitor banks in the 3-phase Induction motor is ________

To decrease the power factor

To decrease the speed

To increase the speed

To increase the power factor

Question 10 of 10