Q.1.To neglect a voltage source, the terminals across the source are
open circuited
short circuited
replaced by some resistance
replaced by an inductor
Q.2.Which is a digital communication system ?
FM
AM
PCM
PAM
Q.3.In a resonant circuit, the power factor at resonance is
zero
unity
0.5
1.5
Q.4.In TV systems the frame frequency is
100
60
50
25
Q.5.The function 3 s has (s + 1) (s + 2)
one zero, two poles
no zero, one pole
no zero, two poles
one zero, no pole
Q.6.One electron volt is equivalent to
1.6 * 10-10 J
1.6 * 10-13 J
1.6 * 10-16 J
1.6 * 10-19 J
Q.7.Which of the following is donor impurity element ?
Aluminium
Boron
Phosphorous (Ans)
Indium.
Q.8.The diameter of an atom is of the order
10-6 m
10-10 m
10-15 m
10-21 m
Q.9.A transistor is basically an amplifying device for
power
voltage
current
all of these
Q.10.If the d.c. valve of a rectified output is 300 V & peak to peak ripple voltage is 10 V, the ripple factor is
1.18%
3.33%
3.36%
6.66%
Q.11.Full wave rectifier output has ripple factor of
1.11
1.21
1.41
1.51
Q.12.In a common base connection IE = 2 mA, IC = 1.9 mA. The value of base current is
0.1 m
0.2 mA
0.3 mA
zero
Q.13.For the action of transistor the base region must be
P-type material
N-type material
very narrow
highly doped
Q.14.Compared to a CB amplifier the CE amplifier has higher
current amplification
output dynamic resistance
leakage current
input dynamic resistance
all of the above
Q.15.When a transistor is biased to cut-off its Y is
0.5
0
1.0
0.8
Q.16.An ideal voltage amplifier should have
Ri = 0, R0 = 0
Ri = 0, R0 =Infinite
Ri = Infinite, R0 = 0
Ri = 0, R0 = Infinite
Q.17.Barichausen criterion for sustained oscillator is
Aβ = 1
Aβ = 0
Aβ = -1
A = 1/√β
Q.18. The value of plastic capacitance for a triode may range from
2 μF to 12 μF
20 μF to 120 μF
2 pF to 12 pF
20 pF to 120 pF
Q.19.A colpitts oscillator uses
tapped coil
inductive feedback
tapped capacitance
no tuned LC circuit
Q.20.A typical frequency for a RC feedback oscillator is
1 KHz
100 MHz
1000 MHz
1 GHz
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The candidate’s comprehension &
understanding of General English shall be tested through simple exercise such
as provision of antonyms and synonyms, fill in the blanks & multiple-choice
exercises etc.This shall also include questions on current events, general
knowledge and such matters of everyday observation and experience as may be
expected of Diploma holder.
PART -II: BASIC ENGINEERING
1. Applied Mathematics:
Co-ordinate Geometry; Vector Algebras, Matrix &
Determinant ;Differential calculus ; Integral calculus, Differential
equation of second order; Fourier Series; Laplace Transform; Complex
Number; Partial Differentiation.
2.Applied Physics:
Measurement-Units & Dimensions; Waves,Acoustics,Ultrasonic;Light; Laser & its Applications;
Atomic Structure and Energy Levels.
3. Basic Electricity:
Electrostatics,coulomb’s law,Electric field,Gauss’s
theorem,concept of potential difference ;concept of capacitance &
capacitors;Ohm‘s law,power energy, Kirchoff’s voltage & current laws
& their applications in simple DC circuits; Basic Magnetism; Electro
Magnetism; Electromagnetic induction; Concept of alternating voltage &
current; cells and Batteries ; Voltage and Current Sources; Thevenin’s
theorem, Norton’s theorem and their applications.
4.Electronic Devices and Circuits:
Classification of materials into conductor ,semi
conductor, insulator etc. electrical properties,magnetic materials,various
types of relays,switches & connectors. Conventional representation of
electric & electronic circuit elements. Active & Passive
components;semi conductors Physics;Semi Conductor Diode; Bipolar
Transistor & their circuits; Transistor Biasing & Stabilization of
operating point; Single stage transistor amplifier;field effect
transistor, Mosfet circuit applications. Multistage Transistor Amplifier;
Transistor Audio Power Amplifiers; Feedback in Amplifier; Sinusoidal
Oscillators; tuned Voltage Amplifier; Opto Electronics Devices & their
applications;Operational Amplifier; wave shaping and switching
circuits.Block diagram of I.C timer(such as 555) and its working;
Multivibrator circuits; Time base circuits; Thyristors and UJT; Regulated
Power Supply.
5.Digital Techniques:
Applications and advantages of digital systems; number
system(binary & hexadecimal); Logic Gates; Logic Simplification; Codes
and Parity; Arithmetic Circuits; Decoders. Display Devices and Associated
Circuits; Multiplexers and De-multiplexers; Latches and Flip Flops;
Counters; Shift Register; Memories; A/D and D/A converters.
PART-III: SPECIALIZATION
1.Electrical Engineering:
3 phase vs single phase supply, Star Delta Connections,
relation between phase & line voltage, power factor and their
measurements; construction and principles of working of various types of
electrical measuring instruments, all types of motor and generator-AC
& DC transformers, starters, rectifiers, invertors, battery charges,
batteries, servo & stepper motors, contactor control circuits, switch
gear, relays, protection devices & schemes, substation,protection
relaying,circuit breaker,generator protection, transformer protection,
feeder & lightening protection,feeder & bus bar protection,
lightening arrestor, earthing, voltage stabilizer & regulators, power
control devices & circuits, phase controlled rectifiers, invertors,
choppers, dual converters, cyclo converters; power electronics application
in control of drivers, refrigeration & air conditioning.
2.Communication:
Modulation & demodulations-principles &
operation of various types of AM, FM and PM modulators/demodulators; pulse
modulation-TDM,PAM,PPM,PWM; Multiplexing, Principles and applications of
PCM.Introduction of Basic block diagram of digital and data communication
system; coding error detection and correction techniques; Digital
Modulation Techniques-ASK,ICW, FSK, SK; Characteristics/ working of data
transmission circuits; UART,USART; Modems; Protocols and their functions,
brief idea of ISDN interfaces, local area Network; Carrier
telephony-Features of carrier telephone system. Microwave Engineering;
Microwave Devices; Waveguides; Microwave Components; Microwave antennas;
Microwave Communication System-Block diagram & working principles of
microwave communication link.
3.Network, Filters and Transmission
Lines:
Two point network,Attenuator;Filters; Transmission
Lines and their applications; characteristic impedance of line; concept of
reflection and standing waves on transmission line; Transmission line
equation; Principle of impedance matching; Bandwidth consideration of
transmission line.
4.Instruments and Measurements:
Specification of instruments-accuracy, precision,
sensitivity, resolution range. Error in measurement and loading effect;
Principles of voltage, current and resistance measurement; Transducers,
measurement of displacement & strain, force & torque measuring
devices, flow of measuring devices, power control devices & circuits.
Types of AC milli voltmeters-Amplifier rectifier amplifier: Block diagram
explanation of a basic CRO & a triggered sweep oscilloscope, front panel
controls; Impedance Bridges & Q-Meters. Principles of working &
specification of logic probes, signal analyzer and logic analyzer, signal
generator, distortion factor meter, spectrum analyzer.
5.Control Systems:
Basic elements of control system ,open & closed
loop system, concepts of feedback. Block diagram of control system, Time
lag,hysterisis linearity concepts; Self regulating & non self
regulating control systems.Transfer function of simple control components,
single feedback configuration. Time response of systems.Stability Analysis;
Characteristics equation. Routh’s table, Nyquist Criterion, Relative stability,
phase margin and gain margin.Routh Harwitz criterion; Root Locus
technique, Bode plot, Power plot, gain margin and phase margin.
6.Microprocessors:
Typical organization of microcomputer system &
functions of its various blocks, Architecture of a Microprocessor;
Memories and I/O Interfacing; Brief idea of M/C & assembly
languages,Machines and Mnemonic codes; Instructions format and Addressing
mode; concept Instruction set; programming exercises in assembly language;
concept of interrupt; Data transfer techniques-sync data transfer,
async data transfer, interrupt driven data transfer,DMA, serial output
data, serial input data.
7.Computer:
Computers & its working,types of
computers,familiarization with DOS & windowconcept of file, directory,
folder, Number Systems; Data Communication. Programming-Elements of a high
level programming language,PASCAL,C;use of basic data structures;
Fundamentals of computer architecture, Processor design, control unit
design; Memory organization. I/O System Organization. Microprocessor-microprocessor
architecture, instruction set and simple assembly level programming.
Microprocessor based system design: typical examples. Personal computers
& their typical uses, data communication principles, types and working
principles of modems,Network principles, OSI model, functions of data link
layer and network layer, networking components; communication
protocol-x.25, TCP/IP.
8.Database Management System:
basic concepts, entity relationship model, relational
model, DBMS based on relational model.
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COMPLETE PREPARATION KIT I TTA PREPARATION TIPS I
