Electric Drives Mock Test 2

10%

Question 1 of 10

1. Calculate the phase angle of the sinusoidal waveform z(t)=8cos(45t+2π÷15).

2π÷15

2π÷39

π÷4

2π÷44

Question 1 of 10

Question 2 of 10

2. Calculate the phase angle of the sinusoidal waveform z(t)=18cos(1546πt+1900π÷76).

25π÷5

25π÷39

π÷4

25π÷1

Question 2 of 10

Question 3 of 10

3. Calculate the active power in a 17 ω resistor with 18 A current flowing through it.

5558 W

5104 W

5508 W

5554 W

Question 3 of 10

Question 4 of 10

4. In an induction motor, when the number of stator slots is equal to an integral number of rotor slots _________

The maximum torque will be high

A high starting torque will be available

The machine may fail to start

There may be a discontinuity in torque slip characteristics

Question 4 of 10

Question 5 of 10

5. The conduction loss versus device current characteristic of a power MOSFET is best approximated by a ________

Exponential decaying functions

Straight line

Rectangular hyperbola

Parabola

Question 5 of 10

Question 6 of 10

6. Calculate the moment of inertia of the thin spherical shell having a mass of 73 kg and diameter of 36 cm.

1.47 kgm²

1.48 kgm²

1.56 kgm²

1.38 kgm²

Question 6 of 10

Question 7 of 10

7. Calculate the moment of inertia of the disc having a mass of 1 kg and radius of 1 m.

2 kgm²

1 kgm²

3 kgm²

.5 kgm²

Question 7 of 10

Question 8 of 10

8. Calculate the moment of inertia of the hollow cylinder having a mass of 78 kg and radius of 49 cm.

9.787 kgm²

9.265 kgm²

9.363 kgm²

9.568 kgm²

Question 8 of 10

Question 9 of 10

9. The slope of the V-I curve is 78°. Calculate the value of resistance. Assume the relationship between voltage and current is a straight line.

4.648 Ω

4.543 Ω

4.732 Ω

4.608 Ω

Question 9 of 10

Question 10 of 10

10. Calculate the active power in a 1 Ω resistor with 2 A current flowing through it.

4 W

2 W

1 W

7 W

Question 10 of 10