ASSIGNMENT

1. TRACTION SYSTEMS & LATEST TRENDS

1. Discuss The Advantages Of 25kv Electric Traction System.

2. Explain Principle of magnetic levitation.

3. Write Ideal requirements of Ideal traction system.

4. State the Advantages & Disadvantages of Electric Traction System Over Non-Electric System.

5. Classify System Of Track Electrification.

6. Discuss Single Phase To D.C System Of Electrical Traction Along With Its Advantages

7. List Various System of Traction. State Advantages and Disadvantages of Electric Drives.

8. Write a short note on Composite Systems.

2. MECHANICS OF TRAIN MOVEMENT.

1. Draw And Explain Speed Time Curve. List Information Available From It.

2. Draw and Label Speed Time Curve for Main Line Service.

3. What Is Speed Time Curve? Draw And Explain Actual Speed Time Curve For Suburban And

Urban Service.

4. Define: 1. Crest Speed 2. Average Speed 3. Scheduled Speed 4. Acceleration 5. Retardation 6.

Stoppage Time.

5. What Is Schedule Speed? State And Explain Factor Affecting It.

6. Explain Term Specific Energy Consumption? Explain Factor Affecting In It.

7. What Is Tractive Effort? Derive General Equation For Tractive Effort.

8. Define Specific Energy Consumption. Derive An Expression Of Specific Energy Consumption

On The Level Track Using Simplified Speed Time Curve.

9. Discuss Factor Affecting Specific Energy Consumption.

10. Examples for Specific Energy consumption and tractive efforts.

3. TRACTION MOTORS AND THEIR CONTROL

1. Discuss Essential Requirement of Electrical And Mechanical Characteristic For The Traction

Motor.

2. Explain Suitability Of Three Phase Induction Motor For Traction Duty.

3. Explain A.C Series Motor For Traction Purpose With Help Of Schematic Diagram, Vector

Diagram And Speed Torque Curve.

4. State The Reason For Use Of Low Frequency A.C Supply For A.C Series Motor.

5. State And Explain Advantages And Disadvantages Of Three Phase Induction Motor As Traction

Motor.

6. Describe Why D.C Series Motor Is Ideal For Traction Duty.

7. Describe The Requirement Of Electric Motor Used For Traction Work

8. List The Advantages Of Electric Breaking. Explain Regenerative Braking.

9. Explain Plugging Employed In Thee Phase Induction Motor.

10. Explain The Series – Parallel Starting Of Two Traction Motor.

11. Write Advantage Of Regenerative Braking. Explain With Diagram Regenerative Braking For

D.C Series Motor.

4. ELECTRIC LOCOMOTIVES & AUXILIARY EQUIPMENT

1. Explain Different Current Collection System For Traction.

2. Write Short Note : Pantograph collector

3. Explain The Low Voltage Lighting System For Coaches.

4. Explain With Diagram 25 Kv Protection System. Why Mho Relay Is Preferred Instead Of Plai

Impedance Relay.

5. Explain Double Battery System For Coach Wiring. State Its Advantages Over Single Battery

System.

6. Explain The Working Of Auto Cut In And Auto Cut Out Switch.

7. Classify Electric Locomotive. Explain Any One With Diagram.

8. Draw The Block Diagram Of A.C/ D.C Composite Locomotives And Explain In Brief Function

Of Its Major Equipments

9. List Various Auxiliaries Used In The Locomotive And Write Their Function In Brief.

10. Draw And Explain Power Circuit Diagram Of A Locomotive Using Composite System.

5. FEEDING AND DISTRIBUTION SYSTEM.

1. Explain The Traction Substation Requirement And Its Selection Criteria.

2. List Factor To Be Considered For Location And Spacing Of Traction Substation And Explain

Them In Brief.

3. Write on Negative Booster.

4. List The Major Equipment Used In A D.C Substation And Explain Its Function.

5. Draw And Explain Lay Out Of Single Phase A.C Sub Station.

6. How Will You Decide The Location Of Substation And Spacing Between Them?