Govt Exams Mock Test FREE | Online Quiz Competition

Q1. What will be the effect of opening of field of a DC shunt motor while motor is running?

The speed of motor will be reduced

The armature current will reduce

The motor will attain dangerously high speed

The motor will continue to constant speed

Q2. In a d.c. generator, the main function of the compensating winding is to

Assist in commutation

Eliminate reactance voltage

Reduce the demagnetizing effect of armature reaction

Reduce the distorting effect of armature reaction

Q3. At maximum efficiency, the iron loss in a transformer is 400 W. What will be its copper loss at half full load.

100 W

400 W

300 W

200 W

Q4. An alternator running at 1500RPM & Delivering 30Amp current to Purely inductive load, With the field current remaining constant, if the speed is reduced to 1000RPM , The load current becomes

Little less than 20Amp

Little more than 20Amp

20Amp

30Amp

Q5. A 3\(\phi\)- 4 pole induction motor is supplied from 3-\(\phi\) 50 Hz AC supply. Find the rotor frequency when it runs at 600 RPM.

25 Hz

30 Hz

20 Hz

35 Hz

Q6. Consider the following two statements and choose the correct answer.
Statement 1: The V-curves of a synchronous motor show relationship between armature current and supply voltage.
Statement 2: The plot of power factor against the field current of synchronous motor is known as inverted V curves.

Statement 1 is TRUE and Statement 2 is FALSE

Statement 1 is FALSE and Statement 2 is TRUE

Both Statement 1 and Statement 2 are TRUE

Both Statement 1 and Statement 2 are FALSE

Q7. The number of electrical degrees passed through in one revolution of a six pole synchronous alternator used for a wind turbine generator is____________.

360

2160

720

1080

Q8. A three phase, 4-pole, 50 Hz induction motor has full load speed of 1455 rpm. What will be the frequency of the rotor-induced EMF?

1.5 Hz

2 Hz

1 Hz

3 Hz

Q9. In case of double cage induction motor, the inner cage has

high inductance and low resistance

low inductance and high resistance

low inductance and low resistance

high inductance and high resistance

Q10. Fractional pitch windings are used in DC machines to

Reduce copper losses

Improve cooling

Increase the generated emf

Reduce sparking

Quiz

Year 2025

November
Week # 2 Quiz 2

Q1. What will be the effect of opening of field of a DC shunt motor while motor is running?

Q2. In a d.c. generator, the main function of the compensating winding is to

Q3. At maximum efficiency, the iron loss in a transformer is 400 W. What will be its copper loss at half full load.

Q4. An alternator running at 1500RPM & Delivering 30Amp current to Purely inductive load, With the field current remaining constant, if the speed is reduced to 1000RPM , The load current becomes

Q5. A 3\(\phi\)- 4 pole induction motor is supplied from 3-\(\phi\) 50 Hz AC supply. Find the rotor frequency when it runs at 600 RPM.

Q6. Consider the following two statements and choose the correct answer.
Statement 1: The V-curves of a synchronous motor show relationship between armature current and supply voltage.
Statement 2: The plot of power factor against the field current of synchronous motor is known as inverted V curves.

Q7. The number of electrical degrees passed through in one revolution of a six pole synchronous alternator used for a wind turbine generator is____________.

Q8. A three phase, 4-pole, 50 Hz induction motor has full load speed of 1455 rpm. What will be the frequency of the rotor-induced EMF?

Q9. In case of double cage induction motor, the inner cage has

Q10. Fractional pitch windings are used in DC machines to

Quiz

Year 2025

January Week # 2 Expire on 07 Feb 2025

January Week # 3 Expire on 14 Feb 2025

January Week # 4 Expire on 21 Feb 2025

February Week # 1 Expire on 28 Feb 2025

November Week # 2 Quiz 2

Q1. What will be the effect of opening of field of a DC shunt motor while motor is running?

Q2. In a d.c. generator, the main function of the compensating winding is to

Q3. At maximum efficiency, the iron loss in a transformer is 400 W. What will be its copper loss at half full load.

Q4. An alternator running at 1500RPM & Delivering 30Amp current to Purely inductive load, With the field current remaining constant, if the speed is reduced to 1000RPM , The load current becomes

Q5. A 3\(\phi\)- 4 pole induction motor is supplied from 3-\(\phi\) 50 Hz AC supply. Find the rotor frequency when it runs at 600 RPM.

Q7. The number of electrical degrees passed through in one revolution of a six pole synchronous alternator used for a wind turbine generator is____________.

Q8. A three phase, 4-pole, 50 Hz induction motor has full load speed of 1455 rpm. What will be the frequency of the rotor-induced EMF?

Q9. In case of double cage induction motor, the inner cage has

Q10. Fractional pitch windings are used in DC machines to

Record & Track Your Performance

November
Week # 2 Quiz 2