Utilization of Electrical Energy and Traction — Winter 2023

Define and explain advantages of electric motors drives.

Explain characteristics of ideal traction system.

What is braking of electric motors? Explain rheostatic braking for d.c. shunt motors.

Explain electric locomotive.

State and explain various systems of track electrifications.

Explain dielectric heating with its applications.

List different methods of electric heating. Explain any one in detail.

Explain advantages of electric welding.

Classify electric welding process.

Explain the construction and working of Ajax Wyatt vertical core type furnace.

List essential properties of resistance heating element.

Explain Microwave heating in detail.

Compare resistance welding and arc welding.

Define following terms:

Current efficiency, ii) Energy efficiency, iii) Electrodeposition.

Explain power supply for electrolytic process.

With the help of schematic diagram explain the working principle of air conditioner.

Define the following terms:

Refrigeration ii) Refrigerant iii) Refrigeration cycle

Draw and explain the electrical circuit used in refrigerator.

Explain Faradays’s laws of electrolysis.

Define the following terms used in illumination:

Luminous flux, ii) LUX, iii) Solid angle

Classify lighting schemes.

Explain speed time curve for traction system with necessary diagram.

Explain different categories of railway services depending on distance to be covered.

Explain merits of regenerative braking used for traction systems.

Write a technical note on : Incandescent lamp