Govt Exams Mock Test FREE | Online Quiz Competition

Q1. The frequency of e.m.f. generated in an 8-pole alternator running at 900 r.p.m. is

50 Hz

60 Hz

120 HZ

none of the above

Q2. A 220 V dc motor has an armature resistance of 1 Ω. If the full load armature current is 20 A, then the induced emf is_________.

180V

200 V

220 V

240V

Q3. If the field winding of a D. C. shunt motor gets opened while the motor is running,

The motor speed will reduce

The armature current will reduce

The motor will attain dangerously high speed

The motor will continue to run at constant speed

Q4. A leading power factor load on an alternator implies that its voltage regulation shall be

positive

negative

zero

any one of these

Q5. In case of a 6 pole DC machine, 90 mechanical degree equals to how many eletrical degrees?

45 degree

90 degree

270 degree

15 degree

Q6. which of the following will not prevent a self excited generator from building up to its full voltage?

open field

wrong direction of rotation

no residual magnetism

speed to high

Q7. 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

Q8. The full load copper loss of a transformer is 1600 W Its copper loss at half full load will be

6400 W

1600 W

800 W

400 W

Q9. During hunting in a synchronous motor

Negative sequence currents are induced

Harmonics are developed in the armature circuit

Damper bar develops torque

Field excitation increases

Q10. A 50 kVA, 4400/220 V transformer has primary winding and secondary winding resistance are R1 = 3.45 \(\Omega\) and R2 = 0.009 \(\Omega\) respectively. Calculate the equivalent resistance of the transformer as referred to primary side.

17.62 \(\Omega\)

13.80 \(\Omega\)

3.45 \(\Omega\)

7.05 \(\Omega\)

Quiz

Year 2025

March
Week # 2 Quiz 2

Q1. The frequency of e.m.f. generated in an 8-pole alternator running at 900 r.p.m. is

Q2. A 220 V dc motor has an armature resistance of 1 Ω. If the full load armature current is 20 A, then the induced emf is_________.

Q3. If the field winding of a D. C. shunt motor gets opened while the motor is running,

Q4. A leading power factor load on an alternator implies that its voltage regulation shall be

Q5. In case of a 6 pole DC machine, 90 mechanical degree equals to how many eletrical degrees?

Q6. which of the following will not prevent a self excited generator from building up to its full voltage?

Q7. 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

Q8. The full load copper loss of a transformer is 1600 W Its copper loss at half full load will be

Q9. During hunting in a synchronous motor

Q10. A 50 kVA, 4400/220 V transformer has primary winding and secondary winding resistance are R1 = 3.45 \(\Omega\) and R2 = 0.009 \(\Omega\) respectively. Calculate the equivalent resistance of the transformer as referred to primary side.

Quiz

Year 2025

February Week # 3 Expire on 14 Mar 2025

February Week # 4 Expire on 21 Mar 2025

March Week # 1 Expire on 31 Mar 2025

March Week # 2 Expire on 07 Apr 2025

March Week # 2 Quiz 2

Q1. The frequency of e.m.f. generated in an 8-pole alternator running at 900 r.p.m. is

Q2. A 220 V dc motor has an armature resistance of 1 Ω. If the full load armature current is 20 A, then the induced emf is_________.

Q3. If the field winding of a D. C. shunt motor gets opened while the motor is running,

Q4. A leading power factor load on an alternator implies that its voltage regulation shall be

Q5. In case of a 6 pole DC machine, 90 mechanical degree equals to how many eletrical degrees?

Q6. which of the following will not prevent a self excited generator from building up to its full voltage?

Q7. 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

Q8. The full load copper loss of a transformer is 1600 W Its copper loss at half full load will be

Q9. During hunting in a synchronous motor

Q10. A 50 kVA, 4400/220 V transformer has primary winding and secondary winding resistance are R1 = 3.45 \(\Omega\) and R2 = 0.009 \(\Omega\) respectively. Calculate the equivalent resistance of the transformer as referred to primary side.

Record & Track Your Performance

March
Week # 2 Quiz 2