What is NTPC?
Setup in 1975, NTPC is the largest power company in India with 19.1% total installed capacity of the country (as on 31 Mar 2008). It contributed 28.50% of the total power generation of the country during 2007-08. NTPC is among the largest five companies in India in terms of market capitalization and ranks 411th in Forbes list of World’s 2000 Largest Companies for the year 2007. And it ranked No. 1 in Best Workplaces for Large Organizations and eighth overall in 2008 by Great Places to Work in collaboration with the Economic Times
Pattern of NTPC written test:
NTPC written test consists of two papers: Aptitude & Technical.
While the questions of Aptitude test is common, questions of the
Technical test would depend on which among the six disciplines
(Electrical, Mechanical, Civil, Control & Instrumentation, Human
Resources & Finance) you belong to.
There are 55 questions in Technical test & 35 in Aptitude – so a
total of 90 multiple-choice questions, which needs to be answered in 2
hours. Thus you have 1 min. 20 seconds aprox. to answer each question –
the questions as such are not difficult and therefore your main focus
would be to answer the questions correctly.
Notes of caution: There is negative marking: 1/4th mark will be
deducted for each wrong answer. So if you make a guess, make it wisely!
For Aptitude test the questions asked are of type: Synonyms, Antonyms,
Comprehension passages, Word analogies, Fill in the sentences with the
most suitable word, Aptitude problem solving skills (train probs, loss
profit sums, ratios, etc.).
Age Eligibility:
For EET:Maximum 27 years as on 01.01.2010 i.e. candidates born before 01.01.83 is not eligible. This age limit is relaxed by two years for the candidates with Post graduation degree.
For ET-HR & ET-Fin: Maximum 29 years as on 01.01.2010 i.e. candidates born before 01.01.81 is not eligible.
Age Eligibility:
For EET:Maximum 27 years as on 01.01.2010 i.e. candidates born before 01.01.83 is not eligible. This age limit is relaxed by two years for the candidates with Post graduation degree.
For ET-HR & ET-Fin: Maximum 29 years as on 01.01.2010 i.e. candidates born before 01.01.81 is not eligible.
Electric Circuits and Fields:Network
graph, KCL, KVL, node and mesh analysis, transient response of dc and
ac networks; sinusoidal steady-state analysis, resonance, basic filter
concepts; ideal current and voltage sources, Thevenin’s, Norton’s and
Superposition and Maximum Power Transfer theorems, two-port networks,
three phase circuits; Gauss Theorem, electric field and potential due to
point, line, plane and spherical charge distributions; Ampere’s and
Biot-Savart’s laws; inductance; dielectrics; capacitance.
Signals and Systems:
Representation of continuous and discrete-time signals; shifting and
scaling operations; linear, time-invariant and causal systems; Fourier
series representation of continuous periodic signals; sampling theorem;
Fourier, Laplace and Z transforms.
Electrical Machines:
Single phase transformer - equivalent circuit, phasor diagram, tests,
regulation and efficiency; three phase transformers - connections,
parallel operation; auto-transformer; energy conversion principles; DC
machines - types, windings, generator characteristics, armature reaction
and commutation, starting and speed control of motors; three phase
induction motors - principles, types, performance characteristics,
starting and speed control; single phase induction motors; synchronous
machines - performance, regulation and parallel operation of generators,
motor starting, characteristics and applications; servo and stepper
motors.
Power Systems:
Basic power generation concepts; transmission line models and
performance; cable performance, insulation; corona and radio
interference; distribution systems; per-unit quantities; bus impedance
and admittance matrices; load flow; voltage control; power factor
correction; economic operation; symmetrical components; fault analysis;
principles of over-current, differential and distance protection; solid
state relays and digital protection; circuit breakers; system stability
concepts, swing curves and equal area criterion; HVDC transmission and
FACTS concepts. Numeric Relays.
Control Systems:
Principles of feedback; transfer function; block diagrams; steady-state
errors; Routh and Niquist techniques; Bode plots; root loci; lag, lead
and lead-lag compensation; state space model; state transition matrix,
controllability and observability.
Electrical and Electronic Measurements:
Bridges and potentiometers; PMMC, moving iron, dynamometer and
induction type instruments; measurement of voltage, current, power,
energy and power factor; instrument transformers; digital voltmeters and
multimeters; phase, time and frequency measurement; Q-meters;
oscilloscopes; error analysis.
Analog and Digital Electronics:
Characteristics of diodes, BJT, FET; amplifiers - biasing, equivalent
circuit and frequency response; oscillators and feedback amplifiers;
operational amplifiers - characteristics and applications; simple active
filters; VCOs and timers; combinational and sequential logic circuits;
multiplexer; Schmitt trigger; multi-vibrators; sample and hold circuits;
A/D and D/A converters; 8-bit / 16-bit microprocessor basics,
architecture, programming and interfacing.
Power Electronics and Drives:
Semiconductor power diodes, transistors, thyristors, triacs, GTOs,
MOSFETs and IGBTs - static characteristics and principles of operation;
triggering circuits; phase control rectifiers; bridge converters - fully
controlled and half controlled; principles of choppers and inverters;
basis concepts of adjustable speed dc and ac drives. Variable speed
control of AC machines.
Syllabus for NTPC Executive Aptitude Test:
Syllabus for NTPC Executive Aptitude Test:
Executive Aptitude Test is common to all disciplines. It will be consist of 50 objective type questions on:
01. Vocabulary
02. Verbal comprehension
03. Quantitative aptitude
04. Reasoning ability to determine data sufficiency
05. Interpretation of graphs/ charts/ tables
06. Numerical ability etc.
from either of the two plates as shown in the given figure then the capacity of the capacitor will become –
V
is equal to –
a.) 3 – j1 b.) 3 + j9
a.) 5 b.) 6.5
b.) RC
a.) cos50tA b.) 2A
a) 9W, 6W and 6W b.) 6W, 6W and 9W
and 
, then if these two networks are connected in series then the impedance matrix of the resulting two-port network will be –
and 
in TEM mode transmission line with respect to the direction of propagation are-
and 
are transverse to the direction of propagation
is and 
are transverse and h has a component in the direction of propagation
is entirely transverse and 
has a component in the direction of propagation
is entirely transverse and 
has a component in the direction of propagation
internal impedance and operating at 1GHz feeds a 
load via a coaxial line of characteristic impedance 50 ohm then the voltage wave ratio on the feed line is –a.) 0.5b.) 1.5 c.) 2.5
b. 
d. 
The high 3-db frequency of the amplifier will approximately
c.) A + AB = A
a.) 
b.) 3
a.) an astable multivibrator b.) A monostable multivibrator
. D = r is-a.) Maxwell’s 1st equationb.) Maxwell’s II equation c.) Maxwell’s III equation
the gate must be-a.) ANDb.) OR c.) NAND
