Electric Drives Mock Test 9

10%

Question 1 of 10

1. Calculate the value of the Input power factor for 3-Φ Fully controlled rectifier if the firing angle value is 16°.

.96

.91

.94

.93

Question 1 of 10

Question 2 of 10

2. Full form of FET is ___________

Fire engage transistor

Field effect terminal

Field effect transistor

Field engage transistor

Question 2 of 10

Question 3 of 10

3. Calculate the output voltage of the Buck converter if the supply voltage is 789 V and duty cycle value is .9.

722.2 V

713.2 V

710.1 V

711.1 V

Question 3 of 10

Question 4 of 10

4. Calculate the circuit turn-off time for 3-Φ Fully controlled rectifier if the firing angle is 13° and supply frequency is 49.5 Hz.

755.1 msec

754.5 msec

730.2 msec

740.8 msec

Question 4 of 10

Question 5 of 10

5. Short circuit problem is severe in case of current source inverter.

False

True

Question 5 of 10

Question 6 of 10

6. Calculate the average value of thyristor current in 3-Φ Full wave converter for the load current=9 A and α=26°.

3 A

5 A

4 A

7 A

Question 6 of 10

Question 7 of 10

7. Buck-Boost acts as Buck converter for duty cycle is equal to _________

Question 7 of 10

Question 8 of 10

8. Calculate Fill factor using the data: P_max=15 W, V_oc=18 V, I_sc=4 A.

.20

.98

.59

.65

Question 8 of 10

Question 9 of 10

9. 1600 V rated 8 SCRs are connected in series. The operation voltage of the string is 4400. Calculate the string efficiency.

35.84 %

30.15 %

34.37 %

38.48 %

Question 9 of 10

Question 10 of 10

10. Short circuit problem is severe in case of Voltage source inverter.

True

False

Question 10 of 10