Previous year question paper for CE (Diploma Electronics & Communication Engineering 5th)

1. Audio System: (13hrs)

1.1 Microphones: construction, working principles and applications of

microphones, their types viz:

a)Carbon

b)moving coil

c)velocity

d)crystal

e)condenser

f) cordless etc.

1.2 Loud Speaker: Direct radiating, horn loaded woofer, tweeter, mid

range, multi-speaker system, baffles and enclosures.

1.3 CD System. - Working Principle of VCD and DVD recording and

playback

1.4 Hi-Fi system - pre-amplifier, amplifier and equalizer system, stereo

amplifier.

2. Monochrome TV:- (16hrs)

- Elements of TV communication system.

- Scanning- its need for picture transmission.

- Need for synchronizing and blanking pulses.

- Progressive scanning- Gross structure, interlaced scanning,

 resolution and band width requirement, tonal gradation.

- Composite Video Signal (CVS) at the end of even and odd fields.

 Equalizing pulses and their need.

- Monochrome picture tube – construction and working, comparison of

 magnetic and electric deflection of beam.

- Block diagram of a TV receiver: function of each block and

 waveform at the input and output of each block.

3. COLOUR TV (13hrs)

3.1 Primary colours, tristimulus values, trichromatic coefficients, concepts of

additive and subtracting mixing of colours, concepts of luminance, Hue

and Saturation, Representation of a colour in colour triangle, visibility

curve

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3.2 Compatibility of colour TV system with monochrome system.

- Introduction to PAL, NTSC,

- Block diagram of PAL TV receiver, explanation and working

4.Advanced Color Television System (06hrs)

 LCD TV, LED TV, Plasma Screens, HDTV, 3DTV

5. Cable Television:- (04 hrs)

Block diagram and principles of working of cable TV and DTH, Set top

box based smart card TV System

6. Basic Block Diagram, Working Principle and Application of: (4hrs)

6.1 Cordless Telephonestem

6.2 Photostat M/C.

6.3 Electronic Ignition System for Automobiles.

6.4 Microwave Oven