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Previous year question hub

Induction Machines - Electrical Machines - Electrical Engineering Previous Year Questions

Practice Induction Machines - Electrical Machines - Electrical Engineering previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

25Papers
18Years
50Questions
1Topics

Induction Machines question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Induction Machines. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Medium 31 62%
Easy 19 38%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

MCQ 36 72%
Numerical Answer Type (NAT) 14 28%

Subject weightage

Top subjects by unique question coverage.

Electrical Engineering
50 Qs

Most asked topics

Top topics across the included previous year papers.

Electrical Machines
50 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Induction Machines
50 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

Electrical Engineering (EE) 2025
1 Qs
Electrical Engineering (EE) 2024
2 Qs
Electrical Engineering (EE) 2023
3 Qs
Electrical Engineering (EE) 2022
4 Qs
Electrical Engineering (EE) 2021
2 Qs
Electrical Engineering (EE) 2020
1 Qs
Electrical Engineering (EE) 2019
2 Qs
Electrical Engineering (EE) 2018
1 Qs
Electrical Engineering (EE) 2017 [Session 1]
2 Qs
Electrical Engineering (EE) 2017 [Session 2]
2 Qs
Electrical Engineering (EE) 2016 [Session 2]
2 Qs
Electrical Engineering (EE) 2016 [Session 1]
1 Qs
Electrical Engineering (EE) 2014 [Session 2]
3 Qs
Electrical Engineering (EE) 2014 [Session 1]
2 Qs
Electrical Engineering (EE) 2014 [Session 3]
1 Qs
Electrical Engineering (EE) 2013 [Session 1]
2 Qs
Electrical Engineering (EE) 2013 [Session 2]
2 Qs
Electrical Engineering (EE) 2013 [Session 3]
2 Qs
Electrical Engineering (EE) 2013 [Session 4]
2 Qs
Electrical Engineering (EE) 2012
2 Qs
Electrical Engineering (EE) 2011
1 Qs
Electrical Engineering (EE) 2010
1 Qs
Electrical Engineering (EE) 2009
2 Qs
Electrical Engineering (EE) 2008
3 Qs
Electrical Engineering (EE) 2007
4 Qs

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
Electrical Engineering (EE) 202520251View paper
Electrical Engineering (EE) 202420242View paper
Electrical Engineering (EE) 202320233View paper
Electrical Engineering (EE) 202220224View paper
Electrical Engineering (EE) 202120212View paper
Electrical Engineering (EE) 202020201View paper
Electrical Engineering (EE) 201920192View paper
Electrical Engineering (EE) 201820181View paper
Electrical Engineering (EE) 2017 [Session 1]20172View paper
Electrical Engineering (EE) 2017 [Session 2]20172View paper
Electrical Engineering (EE) 2016 [Session 1]20161View paper
Electrical Engineering (EE) 2016 [Session 2]20162View paper
Electrical Engineering (EE) 2014 [Session 1]20142View paper
Electrical Engineering (EE) 2014 [Session 2]20143View paper
Electrical Engineering (EE) 2014 [Session 3]20141View paper
Electrical Engineering (EE) 2013 [Session 1]20132View paper
Electrical Engineering (EE) 2013 [Session 2]20132View paper
Electrical Engineering (EE) 2013 [Session 3]20132View paper
Electrical Engineering (EE) 2013 [Session 4]20132View paper
Electrical Engineering (EE) 201220122View paper
Electrical Engineering (EE) 201120111View paper
Electrical Engineering (EE) 201020101View paper
Electrical Engineering (EE) 200920092View paper
Electrical Engineering (EE) 200820083View paper
Electrical Engineering (EE) 200720074View paper

All Induction Machines previous year questions

Practice every matching question in batches of 20, with every available option.

1
2007 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2007

A voltage source inverter is used to control the speed of a three-phase, 50 Hz, squirrel cage induction motor. Its slip for rated torque is 4%. The flux is maintained at rated value. If the stator resistance and rotational losses are neglected, then the frequency of the impressed voltage to obtain twice the rated torque at starting should be

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2
2007 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2007

A three-phase squirrel cage induction motor has a starting torque of 150% and a maximum torque of 300% with respect to rated torque at rated voltage and rated frequency. Neglect the stator resistance and rotational losses. The value of slip for maximum torque is

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3
2007 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2007

If a star-delta starter is used to start this induction motor, the per unit starting torque will be

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4
2007 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2007

If a starting torque of 0.5 per unit is required then the per unit starting current should be

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5
2008 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2008

A 230V, 50 Hz, 4-pole, single-phase induction motor is rotating in the clockwise (forward) direction at a speed of 1425 rpm. If the rotor resistance at standstill is 7.8 Ω, then the effective rotor resistance in the backward branch of the equivalent circuit will be

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6
2008 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2008
A 400 V, 50 Hz, 30 hp, three-phase induction motor is drawing 50 A current at 0.8 power factor lagging. The stator and rotor copper losses are 1.5 kW and 900 W respectively. The friction and windage losses are 1050 W and the core losses are 1200 W. The air-gap power of the motor will be
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7
2008 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2008
The speed of rotation of stator magnetic field with respect to rotor structure will be

Question diagram

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8
2009 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2009

A 3-phase squirrel cage induction motor supplied from a balanced 3-phase source drives a mechanical load. The torque-speed characteristics of the motor (solid curve) and of the load (dotted curve) are shown. Of the two equilibrium points A and B, which of the following options correctly describes the stability of A and B?

Question diagram

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9
2009 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2009
A 220V, 50 Hz, single-phase induction motor has the following connection diagram and winding orientations shown. \( MM' \) is the axis of the main stator winding (\( M_1M_2 \)) and \( AA' \) is that of the auxiliary winding (\( A_1A_2 \)). Directions of the winding axes indicate direction of flux when currents in the windings are in the directions shown. Parameters of each winding are indicated. When switch \( S \) is closed, the motor

Question diagram

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10
2010 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2010
A balanced three-phase voltage is applied to a star-connected induction motor, the phase to neutral voltage being V. The stator resistance, rotor resistance referred to the stator, stator leakage reactance, rotor leakage reactance referred to the stator, and the magnetizing reactance are denoted by r_s, r_r, x_s, x_r, and X_m respectively. The magnitude of the starting current of the motor is given by:
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11
2011 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2011

A three-phase 440V, 6 pole, 50Hz, squirrel cage induction motor is running at a slip of 5%. The speed of stator magnetic field with respect to rotor magnetic field and speed of rotor with respect to stator magnetic field are

Question diagram

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12
2012 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2012

The slip of an induction motor normally does not depend on

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13
2012 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2012

The locked rotor current in a 3-phase, star connected 15 kW, 4-pole, 230 V, 50 Hz induction motor at rated conditions is 50 A. Neglecting losses and magnetizing current, the approximate locked rotor line current drawn when the motor is connected to a 236 V, 57 Hz supply is

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14
2013 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2013 [Session 1]

Leakage flux in an induction motor is

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15
2013 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2013 [Session 1]

A 4-pole induction motor, supplied by a slightly unbalanced three-phase 50 Hz source, is rotating at 1440 rpm. The electrical frequency in Hz of the induced negative sequence current in the rotor is

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16
2014 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2014 [Session 1]
An 8-pole, 3-phase, 50 Hz induction motor is operating at a speed of 700 rpm. The frequency of the rotor current of the motor in Hz is ______________.
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17
2014 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2014 [Session 1]
A 3 phase, 50 Hz, six pole induction motor has a rotor resistance of 0.1 Ω and reactance of 0.92 Ω. Neglect the voltage drop in stator and assume that the rotor resistance is constant. Given that the full load slip is 3%, the ratio of maximum torque to full load torque is
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18
2014 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2014 [Session 2]
A three-phase, 4-pole, self excited induction generator is feeding power to a load at a frequency \(f_1\). If the load is partially removed, the frequency becomes \(f_2\). If the speed of the generator is maintained at 1500 rpm in both the cases, then
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19
2014 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2014 [Session 2]
In a constant \(V/f\) control of induction motor, the ratio \(V/f\) is maintained constant from 0 to base frequency, where \(V\) is the voltage applied to the motor at fundamental frequency \(f\). Which of the following statements relating to low frequency operation of the motor is TRUE?
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20
2014 · Electrical Engineering · Electrical Machines · Induction Machines
Electrical Engineering (EE) 2014 [Session 2]
A three-phase slipping induction motor, provided with a commutator winding, is shown in the figure. The motor rotates in clockwise direction when the rotor windings are closed.
If the rotor winding is open circuited and the system is made to run at rotational speed \(f_r\) with the help of prime-mover in anti-clockwise direction, then the frequency of voltage across slip rings is \(f_1\) and frequency of voltage across commutator brushes is \(f_2\). The values of \(f_1\) and \(f_2\) respectively are
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Showing 20 of 44 questions