Electric Drives Mock Test 3

10%

Question 1 of 10

1. Calculate the moment of inertia of the apple having a mass of .4 kg and diameter of 12 cm.

.0001 kgm²

.0008 kgm²

.0009 kgm²

.0007 kgm²

Question 1 of 10

Question 2 of 10

2. A particular current is made up of two components: a 10 A and a sine wave of peak value 14.14 A. The average value of current is _________

14.14 A

10 A

24.14 A

Zero

Question 2 of 10

Question 3 of 10

3. Calculate the value of the angular acceleration of the motor using the given data: J = 36 kg-m², load torque = 66 N-m, motor torque = 26 N-m.

3.33 rad/s²

4.44 rad/s²

2.22 rad/s²

1.11 rad/s²

Question 3 of 10

Question 4 of 10

4. 440 V, 77 A, 700 rpm DC separately excited motor having a resistance of 0.11 ohms excited by an external dc voltage source of 24 V. Calculate the torque developed by the motor on full load.

452.64 N-m

440.45 N-m

453.51 N-m

451.24 N-m

Question 4 of 10

Question 5 of 10

5. The generated e.m.f from 4-pole armature having 1 conductors driven at 1 rev/sec having flux per pole as 10 Wb, with wave winding is ___________

20 V

70 V

40 V

30 V

Question 5 of 10

Question 6 of 10

6. Calculate the total heat dissipated in a resistor of 50 Ω when 1.4 A current flows through it.

98 W

91 W

93 W

92 W

Question 6 of 10

Question 7 of 10

7. Calculate the moment of inertia of the stick about its center having a mass of 1.1 kg and length of 2.9 m.

.77 kgm²

.47 kgm²

.88 kgm²

.66 kgm²

Question 7 of 10

Question 8 of 10

8. Calculate the value of the duty cycle if the system is on for 1 sec and off for 0 sec.

Question 8 of 10

Question 9 of 10

9. The power factor of a squirrel cage induction motor generally is ___________

.5-.7

.6-.8

.1-.2

.2-.4

Question 9 of 10

Question 10 of 10

10. Calculate the active power in a 1.2 Ω resistor with 1.8 A current flowing through it.

3.12 W

2.18 W

3.88 W

3.44 W

Question 10 of 10