DRDO STA-B PYQ: With Important Topics & Questions

To Download DRDO STA – B PYQ Direct Link Available in this article. DRDO Senior Technical Assistant -B Previous Year Question Paper is most important to get good score in DRDO STA- B Exam.

Through Practicing question paper, you will get and Idia about exam pattern and question level in exam. Along with DRDO CEPTAM STA-B Previous Year Question Papers also you can check Detailed Syllabus of STA-B Exam with DRDO STA-B Syllabus PDF Direct Link. Check DRDO STA-B Exam Pattern, Question Paper PDF, Minimum Qualifying Marks, Selection Process, DRDO STA-B Tier-I and Tier-II Syllabus here.

DRDO STA – B Exam Pattern 2026

The DRDO CEPTAM Tier -1 Exam Pattern for Senior Technical Post (STA) -B include Subjects Quantitative aptitude, reasoning, general awareness, english, and general science. The DRDO CEPTEM II Question Paper contains total of 120 question of 120 marks.

Parameter	Details
Questions	120 Technical MCQs
Duration	120 minutes
Marking	+1 correct, -0.25 wrong
Level	Diploma standard
Mode	Online CBT

DRDO CEPTAM Previous Year Question Paper (PYQs)-  Direct Download Link

DRDO STA- B Question Paper Download Link – PYQ

Exam Date – 12 November 2022.

Shift-1 & Paper-3 – English Medium

DRDO STA- B Question Paper Download Link – PYQ

Exam Date – 12 November 2022.

Shift-1 & Paper-3 – Hindi Medium

DRDO STA- B Question Paper Download Link – PYQ

Exam Date – 14 November 2022.

Shift-3 & Paper-2

DRDO STA- B Question Paper Download Link – PYQ

Exam Date – 13 November 2022.

Shift-1 & Paper-I

DRDO Senior Technical Assistant -B: Passing Percentage

Defence Research and Development Organization (DRDO) CEPTAM Tier 1 exams, including for Technician-A and STA-B, require candidates to meet minimum qualifying/Passing percentages based on category.​

Category	Minimum Qualifying Marks
UR/OBC	40%
SC/ST	35%

DRDO STA-B Selection Process 2026: Stages

• CBT Tier 1 (Screening/Selection)
• CBT Tier 2 (Selection)
• Trade/Skill Test
• Document Verification & Medica

DRDO STA-B Tier-I Syllabus PDF Link

DRDO STA-B Tier- II Syllabus: Important Topics

AUTOMOBILE ENGINEERING – ALL TOPICS

Solid Mechanics and Machine Design

• Stress and strain, elastic constants
• Shear force and bending moment diagrams
• Torsion of circular shafts
• Thin cylinders and spherical shells
• Machine elements: gears, bearings, springs

Fluid and Thermal Engineering

• Fluid properties and classification
• Fluid statics, manometers, buoyancy
• Fluid kinematics and dynamics
• Bernoulli’s equation, momentum equation
• Thermodynamics: laws, cycles (Otto, Diesel)
• IC engines, boilers, nozzles, turbines

Automobile Engineering I

• Vehicle structure and engines
• Engine auxiliary systems (fuel, lubrication, cooling)
• Chassis construction and suspension
• Steering systems, braking systems
• Automotive clutches and transmission

Automobile Engineering II

• Automotive electrical systems
• Vehicle body engineering
• Automotive pollution and control
• Alternative fuels and vehicles
• Electric and hybrid vehicles

Industrial and Production Engineering

• Casting, welding, machining processes
• Metal forming, powder metallurgy
• Metrology and inspection
• Tool engineering, jigs and fixtures
• Work study, production planning

Drawing and Modelling

• Orthographic projections
• Isometric views
• AutoCAD commands
• 3D modeling software
• GD&T (Geometric Dimensioning)

CHEMICAL ENGINEERING – COMPLETE SYLLABUS

Applied Mathematics

• Matrices and determinants
• Differential equations (1st/2nd order)
• Laplace transforms
• Numerical methods
• Probability and statistics

Material and Energy Balance

• Units and dimensions
• Material balance (single/multiple units)
• Energy balance (with/without reaction)
• Combustion calculations
• Recycle, bypass, purge

📖Chemical Engineering Thermodynamics

• First and second laws
• Heat engines, refrigerators
• Pure substance properties
• Phase equilibria (VLE, LLE)
• Chemical reaction equilibria

Chemical Technology

• Inorganic chemicals (fertilizers, acids)
• Organic chemicals (polymers, petrochemicals)
• Petroleum refining processes
• Natural products technology

Chemical Reaction Engineering

• Kinetics of homogeneous reactions
• Interpretation of rate data
• Ideal reactors (batch, CSTR, PFR)
• Non-ideal reactors, residence time

Process Plant Utilities

• Water treatment, steam generation
• Cooling towers, refrigeration
• Compressed air systems
• Effluent treatment plants

Heat Transfer

• Conduction (plane/composite walls)
• Convection (forced/natural)
• Radiation (black/white bodies)
• Heat exchangers (LMTD, NTU)

Fluid Mechanics

• Pipe flow, friction factor
• Pumps, compressors, fans
• Fluidization, pneumatic conveying

Mass Transfer Operations

• Diffusion, distillation, absorption
• Extraction, drying, adsorption
• Humidification, cooling towers

Material Science

• Crystal structures, phase diagrams
• Polymers, ceramics, composites

Process Control and Instrumentation

• P&ID symbols, controllers (PID)
• Sensors, transmitters, control valves

Process Equipment Design

• Pressure vessels (thin/thick)
• Heat exchangers, distillation columns

CHEMISTRY – SYLLABUS

Inorganic Chemistry

• Periodic table and properties
• Chemical bonding (VSEPR, VB, MO)
• Coordination chemistry
• s-block, p-block, d-block, f-block elements
• Metallurgy and qualitative analysis

Organic Chemistry

• Nomenclature, isomerism
• Reaction mechanisms (SN1/SN2, E1/E2)
• Hydrocarbons, alcohols, phenols, ethers
• Aldehydes, ketones, carboxylic acids
• Amines, biomolecules, polymers

Physical Chemistry

• Atomic structure and quantum numbers
• Chemical thermodynamics and equilibria
• Chemical kinetics and catalysis
• Electrochemistry (Nernst equation)
• Surface chemistry and colloids

General Chemistry

• Stoichiometry and solutions
• Acids, bases, buffers, salts
• Nuclear chemistry, environmental chemistry

CIVIL ENGINEERING – EXHAUSTIVE SYLLABUS

RCC Design & Steel Design

• Working stress and limit state methods
• Singly/doubly reinforced beams
• Slabs, columns, footings, staircases
• Steel tension/compression members

Concrete Technology

• Cement properties and types
• Aggregate testing, concrete mix design
• Workability, curing, admixtures
• Non-destructive testing

Construction Material

• Bricks, stones, timber, paints
• Bitumen, asphalt testing

Building Construction

• Foundations, walls, roofs, floors
• Doors, windows, finishing works
• Formwork and scaffolding

Structural Mechanics

• Trusses, arches, cables
• Influence lines, moving loads

Transportation Engineering

• Highway planning, geometrics
• Pavement materials and design
• Traffic engineering, signals

Surveying

• Chain, compass, leveling
• Theodolite, tacheometry
• Curves, contouring

Remote Sensing & GIS

• Aerial photography, satellite imagery
• GIS data layers and analysis

Quantity Surveying

• Rate analysis, specifications
• Valuation, contracts

Geo-Technical Engineering

• Soil classification, permeability
• Compaction, shear strength
• Earth pressure, slope stability

Hydraulics & Water Resources

• Open channel flow, hydraulic machines
• Hydrology, irrigation engineering

Environmental & Public Health Engineering

• Water supply, treatment processes
• Sewage treatment, solid waste management

Construction Management

• PERT/CPM, resource allocation
• Quality control, safety management

COMPUTER SCIENCE & ENGINEERING – FULL TOPICS

Fundamentals of Computer/IT

• Number systems, Boolean algebra
• Computer generations, organization

C Programming & Python

• Data types, control structures
• Functions, pointers, file handling
• Python: lists, dictionaries, functions

Data Structures & Algorithms

• Arrays, stacks, queues, linked lists
• Trees, graphs, hashing
• Sorting (bubble, quick, merge), searching

Database Management System

• ER model, relational algebra
• Normalization (1NF-5NF)
• SQL: DDL, DML, joins, subqueries

Operating Systems

• Process scheduling, synchronization
• Deadlocks, memory management
• File systems, disk scheduling

Software Engineering

• SDLC models, testing strategies
• Software metrics, maintenance

Computer Organization

• CPU architecture, instruction formats
• Cache memory, pipelining

Computer Networks

• OSI/TCP-IP models
• LAN technologies, Ethernet
• IP addressing, routing protocols

Web Technologies

• HTML5, CSS3, JavaScript
• PHP, MySQL basics

OOP Concepts

• Classes, objects, inheritance
• Polymorphism, encapsulation

Digital Electronics

• Logic gates, flip-flops, counters
• Multiplexers, decoders, PLDs

ELECTRICAL & ELECTRONICS ENGINEERING – ALL TOPICS

Electrical Machines

• DC generators/motors (characteristics)
• Transformers (single/three-phase)
• Induction motors, synchronous machines

Power Systems

• Generation (thermal, hydro, nuclear)
• Transmission lines, distribution systems
• Power factor improvement, fault analysis

Circuit Analysis

• Network theorems (Thevenin, Norton)
• AC circuits, resonance, polyphase circuits

Electronics Components & Devices

• Diodes, Zener, transistors (BJT/FET)
• SCR, triac, power electronics

Digital Electronics

• Combinational/sequential circuits
• A/D & D/A converters, memories

Microcontroller & Microprocessor

• 8085/8086 architecture, programming
• Interrupts, I/O interfacing

Control Systems

• Transfer functions, block diagrams
• Stability (Routh-Hurwitz, Nyquist)

Instrumentation & Measurement

• Bridges, transducers, signal conditioning
• CRO, recorders, data loggers

📖Electrical Materials

• Conducting, insulating, magnetic materials
• Superconductors, semiconductors

ELECTRICAL ENGINEERING – COMPLETE LIST

Electrical & Electronics Materials

• Dielectrics, magnetic materials
• Semiconductor physics

Electricity & Magnetism

• Coulomb’s law, electric field
• Magnetic circuits, electromagnetic induction

Electrical Engineering Drawing

• Wiring diagrams, panel layouts
• Symbols and conventions

Estimation & Costing

• Electrical installations costing
• Schedule of rates, tendering

📖Electrical Circuit Analysis

• DC/AC networks, transient analysis
• Power measurement

Electrical Machines

• Principles, characteristics, testing
• Starting and speed control

Electrical Power Engineering

• Tariffs, power factor, earthing

Instrumentation & Control

• Measuring instruments, PLC basics

Electronics & Microprocessor

• Analog/digital circuits
• 8085 instruction set, assembly language

ELECTRONICS & COMMUNICATION ENGINEERING – FULL SYLLABUS

Applied Mathematics

• Matrices, determinants, eigenvalues
• Differential equations (PDE/ODE)
• Laplace/Fourier transforms
• Complex variables, vector calculus

Electronic Components & Devices

• Resistors, capacitors, inductors
• Diodes (PN, Zener, Schottky), LEDs
• Transistors (BJT, FET, MOSFET)
• SCR, TRIAC, IGBT

RF & Microwave Engineering

• Transmission lines, Smith chart
• Waveguides, antennas, radar basics
• Microwave devices (klystron, magnetron)

Digital Electronics

• Logic gates, Boolean algebra
• Combinational circuits (MUX, DEMUX)
• Sequential circuits (flip-flops, counters)
• A/D & D/A converters, PLDs

Electronic Devices & Circuits

• Biasing techniques, amplifiers
• Feedback amplifiers, oscillators
• Op-amps (inverting, non-inverting)
• Multivibrators, timers (555 IC)

Microprocessor & Peripheral Devices

• 8085/8086 architecture, instruction set
• Memory interfacing, I/O ports
• Interrupts, DMA controllers
• PPI 8255, PIT 8253, USART 8251

Electronics Instrumentation & Measurement

• Bridges (Wheatstone, Maxwell)
• CRO, DSO, spectrum analyzer
• Error analysis, standards

C Programming

• Data types, operators, control structures
• Arrays, strings, pointers, functions
• Structures, unions, file handling

Wireless & Mobile Communication

• Cellular concepts, frequency reuse
• GSM, CDMA, 4G/5G basics
• Wireless LAN, Bluetooth, WiFi

Control Systems

• Block diagram reduction, Mason’s gain
• Time response, stability analysis
• Root locus, Bode/Nyquist plots

Optical Fibre & Satellite Communication

• Optical sources (LED, LASER), detectors
• Fibre types, losses, dispersion
• Satellite orbits, link budget

Principles of Analog & Digital Communication

• AM, FM, PM modulation/demodulation
• Sampling theorem, PCM, DM
• Digital modulation (ASK, FSK, PSK)

Microcontrollers & Embedded Systems

• 8051 architecture, programming
• Timers, interrupts, serial communication
• Embedded C, RTOS basics

GEOLOGY – SYLLABUS

General Geology

• Solar system, earth’s interior
• Rocks and minerals classification
• Geological time scale, fossils

Geomorphology

• Landforms, weathering, erosion
• Plate tectonics, earthquakes, volcanoes
• Rivers, glaciers, deserts

Structural Geology

• Folds, faults, joints, unconformities
• Stereographic projections
• Strike, dip measurements

Petrology

• Igneous, sedimentary, metamorphic rocks
• Mineral composition, textures
• Rock cycle

Engineering Geology

• Geological investigations for dams
• Tunnels, highways, buildings
• Landslides, subsidence

Hydrogeology

• Groundwater occurrence, aquifers
• Well hydraulics, groundwater exploration

Remote Sensing & GIS

• Electromagnetic spectrum, sensors
• Image interpretation, photogrammetry
• GIS data models, spatial analysis

INSTRUMENTATION ENGINEERING – SYLLABUS

Applied Mathematics (Same as Electronics)

Electronic Components & Devices (Same as Electronics)

Digital Electronics (Same as Electronics)

Electronics Instrumentation & Measurement

• PMMC, MI instruments
• VTVM, electronic multimeters
• Signal generators, distortion analyzers

Transducers

• Resistance (strain gauge, RTD)
• Inductive (LVDT), capacitive
• Piezoelectric, thermocouples

Display & Recorders

• LED/LCD displays, CRO
• X-Y recorders, data loggers
• Strip chart recorders

Magnetic Circuits & Electrical Machines

• Magnetic materials, hysteresis
• Transformers, DC/AC motors

Electronic Devices & Circuits (Same as Electronics)

Microprocessor (8085) & Microcontroller (8051)

• Assembly language programming
• Interfacing with ADC/DAC

Programming in C Language (Same as Electronics)

Industrial & Process Control

• PLC programming, ladder logic
• SCADA systems, DCS

Control System (Same as Electronics)

Process Instrumentation

• Flow, level, pressure, temperature measurement
• Control valves, pneumatic instruments

INSTRUMENTATION & ELECTRONICS ENGINEERING

(Combines Instrumentation + Electronics syllabus with emphasis on)

Additional Focus Topics

• Signal Transmission: Analog/digital transmission
• Recording & Display: Data acquisition systems
• Process Instrumentation: Chemical plants, power plants
• Transducers & Applications: Industrial applications

LIBRARY SCIENCE – SYLLABUS

Library, Information & Society

• Five laws of library science
• Library legislation, associations
• National libraries, public libraries

ICT Fundamentals

• Computer hardware/software
• Internet, WWW, search engines
• Office automation tools

Information Sources

• Primary, secondary, tertiary sources
• Dictionaries, encyclopedias
• Bibliographies, indexing services

Knowledge Organisation

• Cataloguing (CCC, AACR2)
• Classification (DDC, CC, UDC)
• MARC, Dublin Core

Scholarly Communication

• Journal publishing, OA movement
• Impact factor, h-index
• Plagiarism detection

Management of Library & Information Centre

• Planning, organizing, staffing
• Budgeting, collection development
• Performance evaluation

Information Products & Services

• CAS, SDI, abstracting services
• Reference services, user education

ICT in Libraries

• Library automation software (KOHA)
• Digital libraries, institutional repositories
• RFID, barcode systems

Ethics

• Intellectual property rights
• Information privacy, ethics

MATHEMATICS – COMPLETE SYLLABUS

Algebra & Linear Algebra

• Groups, rings, fields
• Vector spaces, linear transformations
• Matrices, determinants, eigenvalues

Vector Analysis

• Scalar/vector fields, gradient
• Divergence, curl, vector identities
• Line/surface integrals

Calculus

• Limits, continuity, differentiation
• Maxima/minima, Rolle’s theorem
• Multiple integrals, beta/gamma functions

Real Analysis

• Sequences, series convergence
• Continuity, differentiability
• Riemann integration

Complex Analysis

• Analytic functions, Cauchy-Riemann
• Complex integration, residues
• Conformal mapping

Differential Equations

• First order ODEs, exact equations
• Linear ODEs with constant coefficients
• PDEs (wave, heat, Laplace)

Numerical Methods

• Solutions of equations (bisection, Newton)
• Interpolation, numerical differentiation
• Numerical integration (Simpson, trapezoidal)

Statistics & Probability

• Measures of central tendency
• Probability distributions (binomial, Poisson)
• Hypothesis testing, confidence intervals

3D Coordinate Geometry

• Planes, straight lines, spheres
• Cone, cylinder, general surfaces

Operations Research

• Linear programming (graphical, simplex)
• Transportation, assignment problems
• Queuing theory, game theory

Basics of Computer Programming

• C/FORTRAN basics, algorithms
• Flowcharts, simple programs

MECHANICAL ENGINEERING – SYLLABUS

Applied Mathematics (Same as above)

Engineering Drawing & CAD/CAM/CIM

• Orthographic/isometric projections
• Sectional views, dimensioning
• AutoCAD, SolidWorks, CIM concepts

Solid Mechanics & Machine Design

• Stress/strain analysis, Mohr’s circle
• Deflection of beams, columns
• Gears, bearings, shafts, couplings design

Fluid Mechanics & Hydraulic Machines

• Fluid properties, hydrostatics
• Bernoulli’s equation, venturimeter
• Turbines, pumps, hydraulic systems

Thermal & Heat Transfer

• Laws of thermodynamics, entropy
• Conduction, convection, radiation
• Heat exchangers, fins

Refrigeration & Air-conditioning

• Vapour compression cycle
• Psychrometry, cooling load calculation
• Duct design, refrigerants

IC Engines

• Otto/Diesel cycles, valve timing
• Carburetion, injection systems
• Performance testing

Engineering Materials

• Ferrous/non-ferrous metals
• Polymers, ceramics, composites
• Heat treatment processes

Production Engineering

• Casting, welding, machining
• Metal forming, powder metallurgy
• CNC, robotics

Industrial Engineering

• Work study, time/motion study
• PERT/CPM, quality control
• Plant layout, materials management

METALLURGICAL ENGINEERING – EXHAUSTIVE SYLLABUS

Engineering Mathematics

• Linear algebra, calculus, differential equations
• Probability, statistics, numerical methods

Engineering Drawing & Introduction to Computers

• Isometric/orthographic projections
• Sectioning, dimensioning, GD&T
• MS Office, basic programming

Thermodynamics

• First/second laws, entropy, free energy
• Ellingham diagrams, phase stability
• Heat engines, psychrometry

Heat & Mass Transfer

• Conduction, convection, radiation
• Mass transfer coefficients, diffusion
• Heat exchangers, drying operations

Material Science

• Crystal structures, defects, dislocations
• Phase diagrams (binary/ternary)
• Polymers, ceramics, composites

Corrosion & Surface Engineering

• Electrochemical corrosion, Pilling-Bedworth
• Corrosion prevention (coatings, inhibitors)
• Surface treatment (carburizing, nitriding)

Extractive Metallurgy

• Iron & Steel: Blast furnace, BOF, EAF
• Non-ferrous: Copper, aluminum, zinc extraction
• Hydrometallurgy, electrometallurgy
• Refractories, slags, fluxes

Material Testing & Characterisation

• Tensile, hardness (Rockwell, Vickers), impact tests
• NDT (UT, MPT, DPT, RT)
• Microstructure analysis, spectroscopy

Physical Metallurgy

• Diffusion, phase transformations
• Solidification, recovery, recrystallization
• X-ray diffraction, electron microscopy

Mechanical Metallurgy

• Plastic deformation, work hardening
• Fracture mechanics, creep, fatigue
• Heat treatment (annealing, TTT curves)

Workshop Technology

• Foundry, welding, machining processes
• Tools, jigs, fixtures, safety

Manufacturing Processes

• Metal forming (rolling, forging, extrusion)
• Powder metallurgy, joining processes

Industrial Management

• Production planning, inventory control
• Quality management (TQM, Six Sigma)

Heat Treatment Processes

• Annealing, normalizing, hardening, tempering
• Surface hardening (carburizing, induction)

Furnaces & Refractory

• Blast furnace, electric arc furnace
• Refractory properties, selection

PHYSICS – SYLLABUS

Mechanics

• Newton’s laws, friction, circular motion
• Work-energy theorem, conservation laws
• Rotational dynamics, moment of inertia
• Gravitation, simple harmonic motion

Waves & Optics

• Wave motion, superposition, interference
• Stationary waves, Doppler effect
• Geometrical optics (lenses, mirrors)
• Wave optics (Young’s double slit, diffraction)
• Polarization, optical instruments

Electricity & Magnetism

• Electrostatics (Coulomb’s law, electric field)
• Capacitors, current electricity
• Magnetic effects, electromagnetic induction
• AC circuits, electrical machines

Heat & Thermodynamics

• Thermal expansion, calorimetry
• Kinetic theory, specific heats
• Zeroth/first/second laws of thermodynamics
• Carnot cycle, entropy

Modern Physics

• Photoelectric effect, Compton effect
• Atomic models (Bohr, Sommerfeld)
• X-rays, nuclear physics
• Special theory of relativity

Solid State Physics & Electronics

• Crystal structures, lattice vibrations
• Semiconductors, p-n junction
• Transistors, amplifiers, logic gates

Mathematical Physics

• Vector analysis, coordinate systems
• Differential equations, special functions
• Fourier series/transforms

PSYCHOLOGY – SYLLABUS

Introduction & Historical Development

• Psychology definition, goals, methods
• Wilhelm Wundt, structuralism, functionalism
• Schools: Gestalt, Behaviorism, Psychoanalysis

Schools of Psychology

• Behaviorism: Pavlov, Watson, Skinner
• Cognitive Psychology: Piaget, information processing
• Humanistic: Maslow, Rogers
• Psychoanalytic: Freud, Jung, Adler

Biopsychology

• Nervous system (CNS, PNS, neurons)
• Brain structures (lobes, limbic system)
• Endocrine system, genetics in behavior

Cognitive & Sensory Processes

• Sensation: Thresholds, signal detection
• Perception: Gestalt principles, depth perception
• Attention, memory (STM, LTM, forgetting)
• Thinking, problem-solving, language

Statistical Methods for Psychological Research

• Measures of central tendency, dispersion
• Correlation, regression analysis
• t-test, ANOVA, chi-square
• Reliability, validity

Research Methods

• Experimental, correlational, survey designs
• Sampling techniques, ethics in research

Personality

• Trait theories (Allport, Cattell, Big Five)
• Psychoanalytic, humanistic theories
• Personality assessment (projective tests)

Intelligence

• Theories (Spearman, Thurstone, Gardner)
• IQ tests (Stanford-Binet, WAIS)
• Emotional intelligence, creativity

Stress

• Stressors, stress models (Selye)
• Coping mechanisms, stress management
• Burnout, PTSD

Test/Scale Construction

• Item analysis, standardization
• Norms, reliability (test-retest, split-half)
• Validity types (content, criterion)

Social Psychology

• Attitudes, persuasion, conformity
• Group dynamics, leadership
• Prejudice, aggression, prosocial behavior

Psychological Disorders

• DSM-5 classification, anxiety disorders
• Mood disorders, schizophrenia
• Personality disorders, substance abuse

Developmental Psychology

• Piaget’s cognitive stages, Erikson’s psychosocial
• Attachment theory (Bowlby)
• Aging, Alzheimer’s

Organizational Behaviour

• Motivation theories (Maslow, Herzberg)
• Leadership styles, group behavior
• Organizational culture, job satisfaction

Counseling Psychology

• Counseling process, therapeutic alliance
• Client-centered, cognitive-behavioral therapy
• Career counseling, guidance

DRDO STA-B Syllabus Download Link

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