Govt Exams Mock Test FREE | Online Quiz Competition

Q1. If the back e.m.f. and speed of a DC motor are doubled, the torque developed by motor

will remain unchanged.

will reduce to one fourth value

will increase four folds

will be doubled

Q2. The core flux in a transformer depends mainly on

Supply voltage regte

Supply voltage and frequency

Supply voltage, frequency and load

Supply voltage and load but independent of frequency

Q3. Hysteresis loss in a DC machine is directly proportional to

Speed

(speed)2

(speed)1.6

2 X speed

Q4. A transformer does not transform

Power

voltage

current

impedance

Q5. The number of parallel paths in a simplex wave winding is equal to

number of poles/2

number of poles

2

2 \(\times\) number of poles

Q6. The number of commutator segments in a DC machine is equal to…......

Twice the number of poles

Number of coils

Number of conductors

None of the above

Q7. The e.m.f. generated in an alternator is independent of:

Speed

Type of alternator

Series turns per phase

Coil span

Q8. The back emf set up in the stator of a synchronous motor will depend on

rotor speed only

rotor excitation and rotor speed

rotor excitation only

coupling angle, rotor speed and

Q9. The working principle of a BLDC motor is ________________.

Fleming’s left hand rule

electromagnetic Induction

Fleming’s right hand rule

Lorentz force law

Q10. The function of the pole shoes in the case of D.C. machine is to

Spread out the flux to achieve uniform flux density.

Reduce the reluctance of the magnetic path.

Support the field coils

Discharge all the above mentioned functions.

Quiz

Year 2025

January
Week # 2 Quiz 3

Q1. If the back e.m.f. and speed of a DC motor are doubled, the torque developed by motor

Q2. The core flux in a transformer depends mainly on

Q3. Hysteresis loss in a DC machine is directly proportional to

Q4. A transformer does not transform

Q5. The number of parallel paths in a simplex wave winding is equal to

Q6. The number of commutator segments in a DC machine is equal to…......

Q7. The e.m.f. generated in an alternator is independent of:

Q8. The back emf set up in the stator of a synchronous motor will depend on

Q9. The working principle of a BLDC motor is ________________.

Q10. The function of the pole shoes in the case of D.C. machine is to

Quiz

Year 2025

December Week # 3 Expire on 14 Jan 2025

December Week # 4 Expire on 21 Jan 2025

January Week # 1 Expire on 31 Jan 2025

January Week # 2 Expire on 07 Feb 2025

January Week # 2 Quiz 3

Q1. If the back e.m.f. and speed of a DC motor are doubled, the torque developed by motor

Q2. The core flux in a transformer depends mainly on

Q3. Hysteresis loss in a DC machine is directly proportional to

Q4. A transformer does not transform

Q5. The number of parallel paths in a simplex wave winding is equal to

Q6. The number of commutator segments in a DC machine is equal to…......

Q7. The e.m.f. generated in an alternator is independent of:

Q8. The back emf set up in the stator of a synchronous motor will depend on

Q9. The working principle of a BLDC motor is ________________.

Q10. The function of the pole shoes in the case of D.C. machine is to

Record & Track Your Performance

January
Week # 2 Quiz 3