Govt Exams Mock Test FREE | Online Quiz Competition

Q1. The efficiency of a 100 KVA transformer is 0.98 at full as well as at half load. For this transformer the copper loss at full load is

Less than core loss

Equal to core loss

More than core loss

None of the above

Q2. Statement 1: The reactive power drawn by an induction motor will be same irrespective of load torque. Statement 2: The active power drawn by an induction motor will be same irrespective of load torque. Statement 3: The reactive power drawn by an induction motor varies with the variation of load torque. Statement 4: The active power drawn by an induction motor varies with the variation of load torque. Which of these statements are true?

Statements 1 & 2

Statements 2 & 3

Statements 1 & 4

Statements 2 & 4

Q3. Neglecting saturation, if current drawn by a D.C. Series motor is increased from 10 A to 12 A, the percentage increase in torque will be

20

44

12

2

Q4. Calculate % voltage drop of transformer with a % resistance of 2.5 ohm and % reactance of 5 ohm of rating 500 kVA when it is delivering 400 kVA at 0.8 power factor lagging

2%

4%

3%

5%

Q5. Two transformers A and B equal outputs and voltage ratio but unequal percentage impedance of 2 and 4 are operating in parallel. The transformer A will be overloaded by___________percent.

50%

33%

66%

25%

Q6. Two transformers connected in open delta supply a 500 kVA balanced load operating at 0.866 power factor lagging. Load voltage is 440 V. kW supplied by each transformer will be

P1=288.7 kW and P2=144.35 kW

P1=218.7 kW and P2=144.35 kW

P1=218.7 kW and P2=114.35 kW

P1=318.7 kW and P2=214.35 kW

Q7. A field excitation of 20 ampere in a certain alternator results in an armature current of 400 ampere in short circuit and a terminal voltage of 2000 volt on open circuit. The magnitude of the internal voltage drop within the machine at a load current of 200 ampere is

1 V

10 V

100 V

1000 V

Q8. 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

Q9. The motor used where high starting torque is required and where the load is subject to heavy fluctuations is a

d.c. series motor

Differential compound motor

d.c. shunt motor

Cumulative compound motor

Q10. In a 100 KVA transformer, the values of full load iron loss and copper loss are of the order of 900 W and 1600W respectively. At which KVA rating this transformer offers maximum efficiency?

100 kVA

133.33 kVA

75 kVA

86.87 kVA

Quiz

Year 2025

November
Week # 2 Quiz 1

Q1. The efficiency of a 100 KVA transformer is 0.98 at full as well as at half load. For this transformer the copper loss at full load is

Q3. Neglecting saturation, if current drawn by a D.C. Series motor is increased from 10 A to 12 A, the percentage increase in torque will be

Q4. Calculate % voltage drop of transformer with a % resistance of 2.5 ohm and % reactance of 5 ohm of rating 500 kVA when it is delivering 400 kVA at 0.8 power factor lagging

Q5. Two transformers A and B equal outputs and voltage ratio but unequal percentage impedance of 2 and 4 are operating in parallel. The transformer A will be overloaded by___________percent.

Q6. Two transformers connected in open delta supply a 500 kVA balanced load operating at 0.866 power factor lagging. Load voltage is 440 V. kW supplied by each transformer will be

Q7. A field excitation of 20 ampere in a certain alternator results in an armature current of 400 ampere in short circuit and a terminal voltage of 2000 volt on open circuit. The magnitude of the internal voltage drop within the machine at a load current of 200 ampere is

Q8. 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_________.

Q9. The motor used where high starting torque is required and where the load is subject to heavy fluctuations is a

Q10. In a 100 KVA transformer, the values of full load iron loss and copper loss are of the order of 900 W and 1600W respectively. At which KVA rating this transformer offers maximum efficiency?

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

November Week # 2 Quiz 1

Q1. The efficiency of a 100 KVA transformer is 0.98 at full as well as at half load. For this transformer the copper loss at full load is

Q3. Neglecting saturation, if current drawn by a D.C. Series motor is increased from 10 A to 12 A, the percentage increase in torque will be

Q4. Calculate % voltage drop of transformer with a % resistance of 2.5 ohm and % reactance of 5 ohm of rating 500 kVA when it is delivering 400 kVA at 0.8 power factor lagging

Q5. Two transformers A and B equal outputs and voltage ratio but unequal percentage impedance of 2 and 4 are operating in parallel. The transformer A will be overloaded by___________percent.

Q6. Two transformers connected in open delta supply a 500 kVA balanced load operating at 0.866 power factor lagging. Load voltage is 440 V. kW supplied by each transformer will be

Q7. A field excitation of 20 ampere in a certain alternator results in an armature current of 400 ampere in short circuit and a terminal voltage of 2000 volt on open circuit. The magnitude of the internal voltage drop within the machine at a load current of 200 ampere is

Q8. 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_________.

Q9. The motor used where high starting torque is required and where the load is subject to heavy fluctuations is a

Q10. In a 100 KVA transformer, the values of full load iron loss and copper loss are of the order of 900 W and 1600W respectively. At which KVA rating this transformer offers maximum efficiency?

Record & Track Your Performance

November
Week # 2 Quiz 1