RRB Technician Grade 1 Basic science and Engineering (Theory class and subject wise Test series + Mock Test)

UpaStapana Insititute

Assistant Foreman Grand Test Series&nbsp;

Assistant Foreman Grand Test Series

Section-A: 80 Marks.
Diploma in Electrical Engineering.
I. ELECTRICAL MACHINES:
TRANSFORMERS: Emf equation of single phase transformer, operation of transformer on load, equivalent circuit, vector diagram, open-circuit and short-circuit tests, voltage regulation, losses and efficiency, all-day efficiency, parallel operation of single-phase transformers with equal voltage ratios. Voltage and current relations for three-phase transformer connections. Principle of operation of auto-transformer. Cooling of power transformer, Operation of Buchhloz&rsquo;s relay.
D.C. GENERATORS AND MOTORS: Expression for emf equation of D.C.Generator, armature windings, armature reaction, types of generators, characteristics. Torque equation of D.C.Motor, characteristics, speed control, starters, losses and efficiency. Testing of D.C. Machines.
THREE-PHASE INDUCTION MOTORS: Constructional aspects of cage and wound rotor types of induction motors, expression for torque, torque-slip characteristics, full load torque, starting torque and maximum torque, effects of variation of rotor resistance; losses and efficiency; different starting methods; speed control methods.
SINGLE-PHASE INDUCTION MOTORS AND COMMUTATOR MOTORS: Constructional features and operation of single-phase induction motors: split phase, capacitor and shaded pole types. Principle of operation of A.C. series motor, universal motor, Schrage motor.
II. SWITCHGEAR AND PROTECTION:
FAULTS AND SWITCHING APPARATUS: Short-circuit calculations; fuses and isolators; circuit breakers: theory of arc interruption and different types of oil circuit breakers; lightning arrestersand their selection and location.
PROTECTIVE RELAYING: Basic requirements of protective relaying, primary and back-upprotection; classification of electromagnetic relays and their principles of operation; time current characteristic curves; induction type over-current relay, distance relays; Merz price protection, differential protection of transformers, bus bar protection.
III. TRANSMISSION :
LINE CONDUCTORS, LINE SUPPORTS AND SAG CALCULATIONS: Different types of lineconductors, conductor sizes commonly used for different voltage levels, Types of line supports, factors influencing the selection, cross-arms; spans, conductor spacings and ground clearances. Sag calculations and stringing charts.
TRANSMISSION LINE PARAMETERS: Determination of inductance and capacitance of roundand parallel conductors in single phase and three-phase symmetrically spaced lines.
PERFORMANCE OF LINES: Choice of voltage; short, medium and long lines; calculation of sending-end voltage, regulation and efficiency for short lines; nominal and nominal-T methods; Ferranti effect; corona: critical voltages and factors affecting corona.
INSULATORS AND SUBSTATIONS: Different types of insulators: Pin type, strain type, suspension type and relative merits; voltage distribution across string of suspension insulators, string efficiency and methods of improving arcing horns. Equipment used in substations, bus-bar arrangements.
CABLE AND DISTRIBUTION SYSTEMS : Comparison between overhead lines and under ground cable. Types of cables, insulation resistance; localization of cable faults. Primary andsecondary distribution; Feeders and service mains; radial and ring systems of distribution.
IV. MEASURING INSTRUMENTS AND ELECTRIC CIRCUITS:
MEASURING INSTRUMENTS: Indicating instruments: deflecting, controlling and damping torques, pointers and scales; ammeters and voltmeters: moving coil, moving iron, dynamometer, induction types; instrument transformers: C.T and P.T., Wattmeters andmeasurement of power in three phase systems by two-wattmeter method; measurement of energy: Energy meters; M.D. indicators; trivector meter.
ELECTRIC CIRCUITS: Fundamentals of alternating current quantities, sinusoidal waveform; average and effective values; J-notation for A.C quantities; polar form; single phase series andparallel circuits; impedance triangle, phase, power factor. Active and reactive components of power; series and parallel resonance. Three-phase star and delta balanced systems.
V. UTILIZATION OF ELECTRICAL ENERGY:
ELECTRIC DRIVES: Factors governing selection of motors; matching of motors with given loads; electric braking; rating of motor; types of enclosures; motors for particular drive.
ILLUMINATION: Definitions of commonly used terms and units; types of lamps; requirements of good lighting; laws of illumination; terms like : depreciation factor, utilization factor, waste light factor, luminous efficiency, specific energy consumption, space height ratio.
ELECTRIC HEATING AND WELDING: Requirements of good heating materials, materialsgenerally employed, resistance heating; electric furnace; induction heating; dielectric heatingwelding generator and transformers.
&nbsp;
Section-B:
20 Marks.
General Awareness and Numerical Ability :
i) Analytical &amp; Numerical Ability
ii) General Awareness
iii) English
iv) Related to Telangana Culture &amp; Movement
<a href="http://file:///C:/Users/worki/Downloads/SUB_ENG_NOTIFICATION_2018.pdf">http://file:///C:/Users/worki/Downloads/SUB_ENG_NOTIFICATION_2018.pdf</a>v) Computer Knowledge.
&nbsp;

Basic Science and Engineering:
The broad topics that are covered under this shall be Engineering,Drawing (Projections, Views, Drawing Instruments, Lines, Geometric figures, Symbolic Representation), Units, Measurements, Mass Weight and Density, Work Power and Energy, Speed and Velocity, Heat and Temperature, Basic Electricity, Levers and Simple Machines, Occupational Safety and Health, Environment Education, IT Literacy&nbsp;

ALP ITI Electronic Mechanic Trade&nbsp;

Syllabus for Electrical &amp; Allied Engineering Exam Group&ndash; JE
&nbsp;
1 Basic concepts:
Concepts of resistance, inductance, capacitance, and various factors affecting them. Concepts of current, voltage, power, energy and their units.
2 Circuit law:
Kirchhoff&lsquo;s law, Simple Circuit solution using network theorems.
3 Magnetic Circuit:
Concepts of flux, mmf, reluctance, Different kinds of magnetic materials, Magnetic calculations for conductors of different configuration e.g. straight, circular, solenoidal, etc. Electromagnetic induction, self and mutual induction.
4 AC Fundamentals:
Instantaneous, peak, R.M.S. and average values of alternating waves, Representation of sinusoidal wave form, simple series and parallel AC Circuits consisting of R.L. and C, Resonance, Tank Circuit. Poly Phase system &ndash; star and delta connection, 3 phase power, DC and sinusoidal response of R-Land R-C circuit.
5 Measurement and measuring instruments:
Measurement of power (1 phase and 3 phase, both active and reactive) and energy, 2 wattmeter method of 3 phase power measurement. Measurement of frequency and phase angle. Ammeter and voltmeter (both moving oil and moving iron type), extension of range wattmeter, Multimeters, Megger, Energy meter AC Bridges. Use of CRO, Signal Generator, CT, PT and their uses. Earth Fault detection.
6 Electrical Machines:
(a) D.C. Machine &ndash; Construction, Basic Principles of D.C. motors and generators, their characteristics, speed control and starting of D.C. Motors. Method of braking motor, Losses and efficiency of D.C. Machines.
(b) 1 phase and 3 phase transformers &ndash; Construction, Principles of operation, equivalent circuit, voltage regulation, O.C. and S.C. Tests, Losses and efficiency. Effect of voltage, frequency and wave form on losses. Parallel operation of 1 phase /3 phase transformers. Auto transformers.
(c) 3 phase induction motors, rotating magnetic field, principle of operation, equivalent circuit, torque-speed characteristics, starting and speed control of 3 phase induction motors. Methods of braking, effect of voltage and frequency variation on torque speed characteristics, Fractional Kilowatt Motors and Single Phase Induction Motors: Characteristics and applications.
&nbsp;
7 Synchronous Machines:
Generation of 3-phase e.m.f. armature reaction, voltage regulation, parallel operation of two alternators, synchronizing, control of active and reactive power. Starting and applications of synchronous motors.
&nbsp;
8 Generation, Transmission and Distribution:
Different types of power stations, Load factor, diversity factor, demand factor, cost of generation, inter-connection of power stations. Power factor improvement, various types of tariffs, types of faults, short circuit current for symmetrical faults. Switchgears and Protection: Rating of circuit breakers, Principles of arc extinction by oil and air, H.R.C. Fuses, Protection against earth leakage / over current, etc. Buchholz relay, Merz-Price system of protection of generators &amp; transformers, protection of feeders and bus bars. Lightning arresters, various transmission and distribution system, comparison of conductor materials, efficiency of different system. Cable &ndash; Different type of cables, cable rating and derating factor.
9 Estimation and costing:
Estimation of lighting scheme, electric installation of machines and relevant IE rules. Earthing practices and IE Rules
10 Utilization of Electrical Energy:
Illumination, Electric heating, Electric welding, Electroplating, Electric drives and motors.

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