ITI Technician Mechatronics (AITT Theory) study guide
ITI Technician Mechatronics (AITT Theory) · Work through your exam, one topic at a time.
The ITI Technician Mechatronics (AITT Theory) is the theory paper sat under the All India Trade Test, the national trade certification route for ITI trainees in India, administered through NCVT. It is aimed at trainees and apprentices who have completed or are completing the Mechatronics Technician trade and need to demonstrate a working command of the trade's underpinning knowledge. The ITI Technician Mechatronics (AITT Theory) study guide has 14 sections and about 4,966 words.
01Trade Safety
Trade safety in the AITT mechatronics theory paper tests whether you can identify hazards around machines, panels and hand tools, rank controls in the correct order, and state the right emergency response. Questions mix definitions with short scenario reasoning, so always tie a rule to the hazard it removes.
377 words, about 2 min02Occupational Health and Environmental Practices
This domain tests how workplace conditions affect health and how a technician controls them: noise, illumination, heat, dust and fume, chemical handling, ergonomics and waste disposal. Expect questions giving a measured exposure and asking whether it is acceptable, or asking where a particular waste stream must go.
382 words, about 2 min03Engineering Drawing
The exam checks whether you can read an Indian Standards drawing: projection method, line conventions, dimensioning rules, sectional views and geometric tolerance frames. Most marks come from interpreting a symbol or spotting a drawing that breaks a convention.
383 words, about 2 min04Fits, Tolerances and Metrology
This domain tests the ISO limits-and-fits system and the correct use of measuring instruments: vernier caliper, micrometer, dial indicator, slip gauges, sine bar and comparators. Expect a reading calculation, a fit interpretation, or a question on calibration and standard temperature (20 °C).
347 words, about 2 min05Basic Electrical and Electronic Fundamentals
This domain tests circuit laws, AC quantities, power and power factor, three-phase relationships, and the semiconductor and logic basics used on machine panels. Numeric questions are common, so be ready to apply Ohm's law and the power equations quickly and in the right units.
368 words, about 2 min06Mechanical Components
This domain covers the parts that hold a machine together and let it move: threaded fasteners, keys and splines, couplings, bearings, seals, springs and retaining devices. The exam asks you to select a component for a duty, decode its designation, or explain a failure mode.
376 words, about 2 min07Power Transmission and Machine Elements
This domain covers how rotation is transferred and changed: belt, chain and gear drives, gear trains, worm drives, rack and pinion, screw threads, clutches and brakes. Expect velocity-ratio calculations and questions on slip, module and efficiency.
357 words, about 2 min08Pneumatics and Hydraulics
This domain tests fluid-power principles, component symbols and circuit reasoning: force and speed of cylinders, pressure and flow relationships, valves, compressors, FRL units and contamination control. Numeric force and speed questions are frequent, so keep the units consistent.
335 words, about 2 min09Sensors, Transducers and Instrumentation
The exam tests selection and wiring of industrial sensors, signal conditioning and calibration: inductive, capacitive, photoelectric, magnetic and Hall sensors, encoders, LVDT, strain gauges, RTD, thermocouple and pressure transmitters. Expect a signal-scaling calculation and a wiring question.
337 words, about 2 min10Programmable Logic Controllers and Control Systems
This domain tests PLC operation, ladder logic, timers and counters, analogue scaling, interlocks and the difference between open and closed-loop control. Expect a ladder rung to interpret or a scaling and timing calculation.
362 words, about 2 min11Electrical Drives, Motors and Actuators
This domain covers motor types and their control: DC motors, three-phase induction motors, single-phase motors, steppers, servo drives and variable-frequency drives, plus starting methods, braking and protection. Calculations on synchronous speed, slip and step angle are common.
326 words, about 2 min12Mechatronics System Integration
This domain tests how mechanical, electrical, control and software subsystems are joined into one working machine: signal interfacing, earthing and shielding, communication links, I/O mapping, safety interlocks and commissioning sequence. Questions are usually practical - a fault that appears only after integration.
352 words, about 2 min13Robotics and Automation
This domain tests robot anatomy, degrees of freedom, workspace and payload limits, coordinate frames, teach-pendant work and robot safety within automated cells. Expect questions comparing accuracy with repeatability and identifying the axes needed for a task.
343 words, about 2 min14Maintenance, Troubleshooting and Fault Diagnosis
This domain tests maintenance strategy, reliability measures and structured fault-finding on mechatronics equipment. Expect a calculation of availability or OEE, a question on which maintenance type suits a symptom, and a logical sequence for diagnosing a fault.
321 words, about 2 min