Previous year question paper for BEEE (Diploma Computer Engineering 1st-2nd)

1 Application and Advantages of Electricity: (4hrs)

1.1 Difference between AC and DC

1.2 Various applications of electricity.

1.3 Advantages of electrical energy over other types of energy.

2 Quantities of Electricity and Power factor: (8hrs)

2.1 Concept of voltage, current, power (True, Apparent and Reactive

Power), electrical energy and power factor and their units.

2.2 Instruments used for the measurements of voltage, current, power

energy and power factor in an electric circuit and their connections

to measure these electrical quantities.

2.3 Power factor ( unity,laggingand and leading),its practical importance

and improvement.

3 Introduction to Generation, Transmission and Distribution of Electrical

Power. (10hrs)

3.1 Basic idea of single phase and three phase voltage generation.

3.2 Single line representation for primary and secondary transmission

and distribution system showing its practical working voltage.

3.3 Three phase star- delta connection, voltage and current relationship

(no derivation) (Simple Problems)

3.4 Identification of three phase wires, neutral and the earth wire of low

voltage distribution system.

3.5 Practical line voltage and phase voltage used in low voltage

distribution system. ( Voltage between any two phases and any

phase to neutral).

3.6 Arrangement of supply system from pole to the distribution board.

3.7 Function of service line, fuses or MCB ,energy meter, main

switch, distribution board and sub-distribution board. 

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4 Electric Installation (10hrs)

4.1 Distinction between circuits and sub circuit.

4.2 Distinction between light points and power points (light, fan circuits

and power circuit.)

4.3 Method of wiring (loop in system) universally employed for lighting

circuit. Simple circuit exercise

4.4 Method of counting light and power points of domestic installation.

4.5 Calculation of load current for single phase and three phase load.

(Simple Problems)

4.6 Introduction of different wiring systems and various accessories

used.

4.7 Purpose of earthing.

5. Batteries (6hrs)

5.1 Basic idea about primary and secondary cells.

5.2 Charging methods used for lead acid accumulator.

5.3 Testing of battery under charging and discharging condition.

5.4 Maintenance of the battery.

5.5 Rating of the battery.

6. Introduction to Semiconductor (6 hrs)

6.1 Atomic structure, Energy band theory , classification based on

energy band i.e. Insulator, semiconductor and conductor, concept of

electron hole pairs. Crystal structure of Silicon and Germanium.

6.2 Concept of Doping, intrinsic and extrinsic semiconductors, Effect of

temperature on intrinsic and extrinsic semiconductors.

7. Semiconductor Diodes (12 hrs)

7.1 PN Junction, drift and diffusion currents, depletion layer, potential

barrier, effect of forward and reverse biasing in a PN junction.

Concept of junction capacitance in forward and reverse biased

conditions. Breakdown mechanism, Diode ratings/specifications.

7.2 Ideal diode, Semiconductor diode characteristics, static and dynamic

resistance.

7.3 Use of diode as half wave and full wave rectifiers (centre tap and

bridge type), relation between DC output and AC input voltage,

rectifier efficiency (No derivation).

7.4 Applications of Rectifiers.

7.5 Introduction to filter circuits in rectifier.

7.6 Special purpose diodes such as zener diode, light emitting diode,

their working, characteristics and applications

8. Bi-polar Transistors (8 hrs)

 8.1 Concept of junction transistor, PNP and NPN transistors, their symbols

and mechanism of current flow.

 8.2 Transistor configurations: common base (CB), common emitter (CE)

and common collector (CC),current relation and their input/output

characteristics; comparison of the three configurations