Govt Exams Mock Test FREE | Online Quiz Competition

Q1. The regulation of an alternator is likely to be negative in case of

high speed alternators

slow speed alternators

lagging power factor of the load

leading power factor of the load.

Q2. The mechanical power developed by a d.c. motor is maximum when the back e.m.f is

Equal to half of the applied voltage

Equal to the applied voltage

Equal to one third of the applied voltage

Equal to one fourth of the applied voltage

Q3. A DC shunt motor takes 5A at 100V when running light. Shunt field resistance is 50 ohm and armature resistance is 0.2 ohm. What will be driving power?

204 W

298 W

412 W

305 W

Q4. A 10-pole induction motor is supplied by a 6-pole alternator, which is driven at 1400 rpm. If the motor runs with a slip of 5%, what is its speed?

1575 rpm

882 rpm

1425 rpm

798 rpm

Q5. The desirable properties of transformer core material are

Low permeability and low hysteresis loss

High permeability and low hysteresis loss

High permeability and high hysteresis loss

Low permeability and high hysteresis loss

Q6. An alternator is supplying a load of 500 kW at a p.f of 0.5 lagging. If the power factor is raised to unity, how many more kW can alternator supply for the same kVA loading?

500 kW

1000 kW

250 kW

750 kW

Q7. A 230V dc motor has an armature circuit resistance of 0.6 ohm. If the full load armature current is 30A and the no load armature current is 4A, the change in back emf from no load to full load will be

64V

15.6V

1.5V

32.2V

Q8. In a DC series motor, the torque developed is 20 Nm at 10 A load current, if the load current is doubled, the new torque will be

40 N-m

10 N-m

80 N-m

60 N-m

Q9. The frequency of the supply to the stator of an 8-pole induction motor is 50Hz and the rotor frequency is 3Hz. The slip is_________.

0

0.02

0.04

0.06

Q10. A 230/460 V transformer has a primary resistance of 0.2 ohm and reactance of 0.5 ohm and corresponding values for secondary are 0.75 ohm and 1.8 ohm respectively. Find secondary terminal voltage when supplying 10 A and 0.8 power factor lagging

434.8 V

244.8 V

424.8 V

342.8 V

Quiz

Year 2024

June
Week # 2 Quiz 1

Q1. The regulation of an alternator is likely to be negative in case of

Q2. The mechanical power developed by a d.c. motor is maximum when the back e.m.f is

Q3. A DC shunt motor takes 5A at 100V when running light. Shunt field resistance is 50 ohm and armature resistance is 0.2 ohm. What will be driving power?

Q4. A 10-pole induction motor is supplied by a 6-pole alternator, which is driven at 1400 rpm. If the motor runs with a slip of 5%, what is its speed?

Q5. The desirable properties of transformer core material are

Q6. An alternator is supplying a load of 500 kW at a p.f of 0.5 lagging. If the power factor is raised to unity, how many more kW can alternator supply for the same kVA loading?

Q7. A 230V dc motor has an armature circuit resistance of 0.6 ohm. If the full load armature current is 30A and the no load armature current is 4A, the change in back emf from no load to full load will be

Q8. In a DC series motor, the torque developed is 20 Nm at 10 A load current, if the load current is doubled, the new torque will be

Q9. The frequency of the supply to the stator of an 8-pole induction motor is 50Hz and the rotor frequency is 3Hz. The slip is_________.

Q10. A 230/460 V transformer has a primary resistance of 0.2 ohm and reactance of 0.5 ohm and corresponding values for secondary are 0.75 ohm and 1.8 ohm respectively. Find secondary terminal voltage when supplying 10 A and 0.8 power factor lagging

Quiz

Year 2024

July Week # 1 Expire on 31 Jul 2024

July Week # 2 Expire on 07 Aug 2024

July Week # 3 Expire on 14 Aug 2024

July Week # 4 Expire on 21 Aug 2024

June Week # 2 Quiz 1

Q1. The regulation of an alternator is likely to be negative in case of

Q2. The mechanical power developed by a d.c. motor is maximum when the back e.m.f is

Q3. A DC shunt motor takes 5A at 100V when running light. Shunt field resistance is 50 ohm and armature resistance is 0.2 ohm. What will be driving power?

Q4. A 10-pole induction motor is supplied by a 6-pole alternator, which is driven at 1400 rpm. If the motor runs with a slip of 5%, what is its speed?

Q5. The desirable properties of transformer core material are

Q6. An alternator is supplying a load of 500 kW at a p.f of 0.5 lagging. If the power factor is raised to unity, how many more kW can alternator supply for the same kVA loading?

Q7. A 230V dc motor has an armature circuit resistance of 0.6 ohm. If the full load armature current is 30A and the no load armature current is 4A, the change in back emf from no load to full load will be

Q8. In a DC series motor, the torque developed is 20 Nm at 10 A load current, if the load current is doubled, the new torque will be

Q9. The frequency of the supply to the stator of an 8-pole induction motor is 50Hz and the rotor frequency is 3Hz. The slip is_________.

Q10. A 230/460 V transformer has a primary resistance of 0.2 ohm and reactance of 0.5 ohm and corresponding values for secondary are 0.75 ohm and 1.8 ohm respectively. Find secondary terminal voltage when supplying 10 A and 0.8 power factor lagging

Record & Track Your Performance

June
Week # 2 Quiz 1