Previous year question paper for UEE (Diploma Electrical Engineering 6th)

1. Electric Drives:

1.1 Advantages of electric drives

1.2 Characteristics of different mechanical loads

1.3 Types of motors used as electric drive

1.4 Electric braking

1.4.1 Plugging

1.4.2 Rheostatic braking

1.4.3 Regenerative braking

1.5 Methods of power transfer by direct coupling by using devices like belt drive,

gears, chain drives etc.

1.6 Examples of selection of motors for different types of domestic loads

1.7 Selection of drive for applications such as general workshop, textile mill, paper

 mill, steel mill, printing press, crane and lift etc. Application of flywheel.

2. Illumination:

2.1 Nature of light, visibility spectrum curve of relative sensitivity of human eye and wave

length of light

2.2 Definition: Luminous flux, solid angle, luminous intensity, illumination, luminous

efficiency, depreciation factor, coefficient of utilization, space to height ratio, reflection

factor, glare, shadow, lux.

2.3 Laws of illumination – simple numericals

2.4 Different type of lamps, construction and working of incandescent and discharge lamps

– their characteristics, fittings required for filament lamp, mercury vapour sodium lamp,

fluorescent lamp, halogen lamp, neon lamp.

2.5 Calculation of number of light points for interior illumination, calculation of illumination at

different points, considerations involved in simple design problems. Illumination

schemes; indoor and outdoor illumination levels

2.6 Main requirements of proper lighting; absence of glare, contrast and shadow

2.7 General ideas about time switches street lighting, flood lighting, monument lighting and

decorative lighting, light characteristics etc.

3.Electric Heating

3.1 Advantages of electrical heating

3.2 Heating methods:

3.2.1 Resistance heating – direct and indirect resistance heating, electric ovens, their

temperature range, properties of resistance heating elements, domestic water

heaters and other heating appliances, thermostat control circuit

3.2.2 Induction heating; principle of core type and coreless induction furnace, their

construction and applications

3.2.3 Electric arc heating; direct and indirect arc heating, construction, working and

applications of arc furnace

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3.2.4 Dielectric heating, applications in various industrial fields

3.2.5 Infra-red heating and its applications

3.2.6 Microwave heating and its applications

3.3 Simple design problems of resistance heating element

4. Electric Welding:

4.1 Advantages of electric welding

4.2 Welding method

4.2.1 Principles of resistance welding, types – spot, projection, seam and butt welding,

 welding equipment

4.2.2 Principle of arc production, electric arc welding, characteristics of arc; carbon

arc, metal arc, hydrogen arc welding method and their applications. Power supply

requirement. Advantages of using coated electrodes, comparison between AC and DC

arc welding, welding control circuits, welding of aluminum and copper

4.1 Introduction to TIG and MIG welding

5. Electrolytic Processes:

Need of electro-deposition

5.2 Laws of electrolysis, process of electro-deposition - clearing, operation, deposition of

metals, polishing and buffing

5.3 Equipment and accessories for electroplating

5.4 Factors affecting electro-deposition

5.5 Principle of galvanizing and its applications

5.6 Principles of anodizing and its applications

5.7 Electroplating of non-conducting materials

5.8 Manufacture of chemicals by electrolytic process

6. Electrical Circuits used in Refrigeration, Air Conditioning and Water Coolers: (10 hrs)

6.1 Principle of air conditioning, vapour pressure, refrigeration cycle, eco-friendly

refrigerants

6.2 Description of Electrical circuit used in

a) Refrigerator,

b) Air-conditioner, and

c) Water cooler

7. Electric Traction:

7.1 Advantages of electric traction

7.2 Different systems of electric traction, DC and AC systems, diesel electric system, types

of services – urban, sub-urban, and main line and their speed-time curves

7.3 Different accessories for track electrification; such as overhead catenary wire,

conductor rail system, current collector-pentagraph

7.4 Factors affecting scheduled speed

7.5 Electrical block diagram of an electric locomotive with description of various equipment

and accessories used.

7.6 Types of motors used for electric traction

7.7 Starting and braking of electric locomotives

7.8 Introduction to EMU and metro railways