Govt Exams Mock Test FREE | Online Quiz Competition

Q1. The speed of a DC motor is ……..

inversely proportional to flux/pole

inversely proportional to applied voltage

directly proportional to flux/pole

None of the above

Q2. The speed of 4 pole, 60 Hz synchronous machine will be

1800 rpm

2400 rpm

3000 rpm

3600 rpm

Q3. The applied voltage of a transformer is increased by 50% and its frequency is reduced to 50%. The maximum core flux density will

Become three times.

Become 1.5 times.

Become half.

Remain the same.

Q4. The chording angle for eliminating fifth harmonic should be:

\(35^\circ\)

\(45^\circ\)

\(36^\circ\)

\(40^\circ\)

Q5. Shunt generator running at 800 R.P.M. as the generated E.M.F. as 200 V. If the speed increases to 1000 R.P.M.(assuming other conditions to remain same). The generated E.M.F. will be

More than 200 V

Less than 200 V

Remain unchanged

None of the above

Q6. A separately excited DC generator has induced emf of 250 V and a full load terminal voltage of 240 V. If the value of armature resistance is 0.1 \(\Omega\) ,find the output of the generator.

26 kW

25 kW

24 kW

28 kW

Q7. A four pole d.c. generator is running at 1500 r.p.m. The frequency of current in armature winding is

25 Hz

35 Hz

50 Hz

60 Hz

Q8. Two synchronous generators G1and G2 are equally sharing the KVAR of the load while operating in parallel. Keeping the terminal voltage fixed in order to shift part of the KVAR load from G2 to G1

The field current of G1 is lowered

The field current of G2 is raised

The field current of G1 is raised and of G2 lowered

The field current of G1 is lowered and of G2 is raised

Q9. A single-phase transformer is fed with a rated supply and operates at no load. If the core of the transformer is air-core, then the waveform of steady state magnetising current drawn from the supply would be a ___________.

flat topped wave

pure sinusoidal wave

peaky wave with strong third harmonic component

rectangular wave

Q10. For a 4-pole, D.C. Lap winding with 20 slots and one conductor per layer, the number of commutator segment is

40

20

80

160

Quiz

Year 2024

September
Week # 2 Quiz 2

Q1. The speed of a DC motor is ……..

Q2. The speed of 4 pole, 60 Hz synchronous machine will be

Q3. The applied voltage of a transformer is increased by 50% and its frequency is reduced to 50%. The maximum core flux density will

Q4. The chording angle for eliminating fifth harmonic should be:

Q5. Shunt generator running at 800 R.P.M. as the generated E.M.F. as 200 V. If the speed increases to 1000 R.P.M.(assuming other conditions to remain same). The generated E.M.F. will be

Q6. A separately excited DC generator has induced emf of 250 V and a full load terminal voltage of 240 V. If the value of armature resistance is 0.1 \(\Omega\) ,find the output of the generator.

Q7. A four pole d.c. generator is running at 1500 r.p.m. The frequency of current in armature winding is

Q8. Two synchronous generators G1and G2 are equally sharing the KVAR of the load while operating in parallel. Keeping the terminal voltage fixed in order to shift part of the KVAR load from G2 to G1

Q9. A single-phase transformer is fed with a rated supply and operates at no load. If the core of the transformer is air-core, then the waveform of steady state magnetising current drawn from the supply would be a ___________.

Q10. For a 4-pole, D.C. Lap winding with 20 slots and one conductor per layer, the number of commutator segment is

Quiz

Year 2024

November Week # 4 Expire on 21 Dec 2024

December Week # 1 Expire on 31 Dec 2024

December Week # 2 Expire on 07 Jan 2025

December Week # 3 Expire on 14 Jan 2025

September Week # 2 Quiz 2

Q1. The speed of a DC motor is ……..

Q2. The speed of 4 pole, 60 Hz synchronous machine will be

Q3. The applied voltage of a transformer is increased by 50% and its frequency is reduced to 50%. The maximum core flux density will

Q4. The chording angle for eliminating fifth harmonic should be:

Q5. Shunt generator running at 800 R.P.M. as the generated E.M.F. as 200 V. If the speed increases to 1000 R.P.M.(assuming other conditions to remain same). The generated E.M.F. will be

Q6. A separately excited DC generator has induced emf of 250 V and a full load terminal voltage of 240 V. If the value of armature resistance is 0.1 \(\Omega\) ,find the output of the generator.

Q7. A four pole d.c. generator is running at 1500 r.p.m. The frequency of current in armature winding is

Q8. Two synchronous generators G1and G2 are equally sharing the KVAR of the load while operating in parallel. Keeping the terminal voltage fixed in order to shift part of the KVAR load from G2 to G1

Q9. A single-phase transformer is fed with a rated supply and operates at no load. If the core of the transformer is air-core, then the waveform of steady state magnetising current drawn from the supply would be a ___________.

Q10. For a 4-pole, D.C. Lap winding with 20 slots and one conductor per layer, the number of commutator segment is

Record & Track Your Performance

September
Week # 2 Quiz 2