Electric Drives Questions and Answers

Electric Drives Interview Questions and Answers

Our 1000+ Electric Drives questions and answers focuses on all areas of Electric Drives subject covering 100+ topics in Electric Drives. These topics are chosen from a collection of most authoritative and best reference books on Electric Drives. One should spend 1 hour daily for 2-3 months to learn and assimilate Electric Drives comprehensively. This way of systematic learning will prepare anyone easily towards Electric Drives interviews, online tests, examinations and certifications.

Highlights

– 1000+ Multiple Choice Questions & Answers in Electric Drives with explanations
– Every MCQ set focuses on a specific topic in Electric Drives Subject

Who should Practice these Electric Drives Questions?
– Anyone wishing to sharpen their knowledge of Electric Drives Subject
– Anyone preparing for aptitude test in Electric Drives
– Anyone preparing for interviews (campus/off-campus interviews, walk-in interview and company interviews)
– Anyone preparing for entrance examinations and other competitive examinations
– All – Experienced, Freshers and Students

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Here’s list of Questions & Answers on Electric Drives Subject covering 100+ topics:

1. Questions & Answers on Dynamics of Electrical Drives

The section contains questions and answers on loads types, speed quadrantal diagram, load torques that depends on path or position of load during motion, motor load combination dynamics, moment of inertia determination, electric drives steady state and transient stability.

Types of Loads
Quadrantal Diagram of Speed – Torque Characteristics
Load Torques that Depend on the Path or Position Taken by the Load During Motion
Load Torques that Vary with Angle of Displacement of the Shaft
Load Torques that Vary with Time
Dynamics of Motor-Load Combination
Determination of Moment of Inertia
Steady State Stability of an Electric Drive
Transient Stability of an Electric Drive

2. Questions on Characteristics of DC & AC Motors

The section contains questions on dc motors basic relations and characteristics, dc shunt motors speed torque characteristics, modified characteristics applications, armature terminal voltage control, three phase induction and synchronous motors.

Basic Relations
Basic Characteristics
Modified Speed Torque Characteristics of DC Shunt Motors
Modified Speed Torque Characteristics of DC Series Motors
Application of Modified Characteristics
Direct Control of Armature-Terminal Voltage
Three Phase Induction Motors
Three Phase Synchronous Motors

3. Questions & Answers on Starting

The section contains questions and answers on power supply starting effect, starting electric motors methods, acceleration time, energy relations and energy loss reduce methods during starting.

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Effect of Starting on Power Supply, Motor and Load
Methods of Starting Electric Motors
Acceleration Time
Energy Relations During Starting
Methods to Reduce the Energy Loss During Starting

4. Questions on Speed Control of Direct Current Motors & Induction Motors

The section contains questions on shunt and series motor speed control, speed control basic principles, speed controlling using rotor resistance and inductance , rotor voltage injection, slip energy recovery, current source speed control, voltage/frequency control, speed controlling by adjusting stator voltage and supply frequency.

Speed Control of Shunt or Separately Excited Motors
Speed Control of Series Motor
Basics Principles of Speed Control
Controlling Speed Using Rotor Resistance
Rotor Voltage Injection
Slip Energy Recovery
Controlling Speed Using Inductance
Controlling Speed by Adjusting the Stator Voltage
Controlling Speed by Adjusting the Supply Frequency
Voltage/Frequency Control
Current Source Speed Control

5. Questions & Answers on Braking of Electric Motors

The section contains questions and answers on electric motors braking like regenerative braking, dynamic and countercurrent braking.

Regenerative Braking
Dynamic Braking
Countercurrent Braking

6. Questions on Braking of DC Motors & Induction Motors

The section contains questions on dc shunt and series motors regenerative braking, dynamic braking of dc shunt and series motors, dc shunt motors countercurrent braking, 3-phase im regenerative braking and dynamic braking.

Regenerative Braking of DC Shunt Motors
Regenerative Braking of DC Series Motors
Dynamic Braking of DC Shunt Motors
Dynamic Braking of DC Series Motors
Countercurrent Braking of DC Shunt Motors
Regenerative Braking (3-phase IM)
Dynamic Braking(IM)

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7. Questions & Answers on Rating and Heating of Motors

The section contains questions and answers on heating effects, loading conditions and duty classes, load inertia effect, electric motors determination, load equalisation and environmental factors.

Heating Effects
Loading Conditions and Classes of Duty
Determination of Power Rating of Electric Motors for Different Applications
Effect of Load Inertia
Load Equalisation
Environmental Factors

8. Questions on Introduction to Solid State Controlled Drives

The section contains questions on dc and ac motor systems, switch-reluctance motor drives and brushless dc motors.

DC Motor Systems
AC Motor Systems
Switch-Reluctance Motor Drives
Brushless DC Motors

9. Questions & Answers on Introduction to Solid-State Devices

The section contains questions and answers on solid state devices transistors and thyristors, power electronic devices ratings, di/dt and dv/dt protections.

Transistors
Thyristors
Ratings of Power Electronic Devices
di/dt and dv/dt Protection

10. Questions on Introduction to Solid-State Switching Circuits

The section contains questions on single phase, half-wave, ac/dc conversion for resistive loads and inductive loads without freewheeling diode, three phase, full-wave, ac/dc conversions, conversions like dc/dc and dc/ac conversion, three-phase energy recovery systems and current source inverter.

Single Phase, Half-Wave, AC/DC Conversion for Resistive Loads
Single Phase, Full-Wave, AC/DC Conversion for Resistive Loads
Single Phase, Half-Wave, AC/DC Conversion for Inductive Loads Without Freewheeling Diode
Single Phase, Half-Wave, AC/DC Conversion for Inductive Loads With Freewheeling Diode
Three Phase, Half-Wave, AC/DC Conversion for Resistive Loads
Three Phase, Full-Wave, AC/DC Conversion
DC/DC Conversion
DC/AC Conversion
Three-Phase Energy Recovery Systems
Current Source Inverter

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11. Questions & Answers on Solar and Battery Powered Drives

The section contains questions and answers on solar panels, solar powered pump drives and vehicles.

Solar Panels
Solar Powered Pump Drives
Solar Powered Vehicles

12. Questions on Traction Drives

The section contains questions on electric traction services, traction load nature, traction drives power factor and harmonics.

Electric Traction Services
Nature of Traction Load
Power Factor and Harmonics

13. Questions & Answers on Electrical Drive Systems and Components

The section contains questions and answers on electrical drive systems, sequence operations and protection.

Electrical Drive Systems Sequence Operations and Protection
If you would like to learn Electric Drives thoroughly, you should attempt to work on the complete set of questions and answers mentioned above. It will immensely help anyone trying to crack an exam or an interview.

Here’s the list of Best Reference Books in Electric Drives.

Wish you the best in your endeavor to learn and master Electric Drives!

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer & SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage, Advanced C Programming, SAN Storage Technologies, SCSI Internals & Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him @ LinkedIn