ITI/NCVT Mechanic Consumer Electronics (AITT Theory) study guide
ITI/NCVT Mechanic Consumer Electronics (AITT Theory) · Work through your exam, one topic at a time.
The All India Trade Test (AITT) in Mechanic Consumer Electronics is the theory assessment taken by trainees who have completed the NCVT-recognised trade course in consumer electronics servicing. It tests whether you understand the trade, not just whether you can follow a wiring diagram: safety and workshop practice, electrical fundamentals, semiconductor devices and power supplies, analog and digital circuits, audio and video equipment, white goods and home appliances, communication and mobile devices, measurement and fault diagnosis, and installation and customer-facing service work. The ITI/NCVT Mechanic Consumer Electronics (AITT Theory) study guide has 10 sections and about 3,039 words.
01Safety, Environment and Workshop Practices
This domain tests safe isolation, shock protection, fire response, tool use, chemical and e-waste handling, and the workshop discipline expected in a consumer-electronics service centre. Verify dead before touching: isolate, lock off, prove the tester on a known live source, test the circuit, then prove the tester again.
346 words, about 2 min02Basic Electricity and Electronic Components
This domain tests Ohm's law and Kirchhoff's laws, AC quantities, passive components, colour codes, ratings and protective devices. V = IR; series elements share current, parallel elements share voltage.
310 words, about 2 min03Semiconductor Devices and Power Supplies
This domain tests diodes, rectifiers, zener regulation, transistors, thyristors, linear regulators and switch-mode power supplies. A silicon diode drops about 0.7 V; a bridge rectifier therefore loses about 1.4 V.
306 words, about 2 min04Analog Circuits and Amplifiers
This domain tests biasing, small-signal and power amplifier classes, negative feedback, op-amp configurations, filters and oscillators. Class A conducts throughout the cycle and is inefficient; class AB reduces crossover distortion with two devices; class D switches for high efficiency.
285 words, about 1 min05Digital Electronics and Microcontrollers
This domain tests logic gates, Boolean algebra, flip-flops, counters, ADC/DAC, and microcontroller ports, timers, interrupts and serial links. Know AND, OR, NOT, NAND, NOR, XOR truth tables and De Morgan's laws.
285 words, about 1 min06Audio and Video Equipment Servicing
This domain tests audio chains, speaker matching, television signal and display sections, and systematic fault finding in audio and video products. An audio chain runs source, preamplifier, power amplifier, cable and loudspeaker.
307 words, about 2 min07Consumer Appliances and White Goods
This domain tests refrigeration, washing machines, microwave ovens, induction cooktops and water heaters, including electrical and mechanical fault finding. A vapour-compression refrigerator has compressor, condenser, capillary/expansion device, evaporator and thermostat.
307 words, about 2 min08Communication and Mobile Devices
This domain tests cellular generations, SIM and IMEI identity, RF front ends, antennas, charging and battery circuits, displays and firmware service procedures. GSM, UMTS and LTE use different air interfaces and bands.
295 words, about 1 min09Measurement, Testing and Fault Diagnosis
This domain tests instrument selection, safe probing, measurement interpretation and structured fault-finding in consumer electronic equipment. A digital multimeter is good for voltage, resistance and continuity; a DSO shows waveform, timing and ripple.
295 words, about 1 min10Installation, Maintenance and Customer Service
This domain tests site survey, load and cable selection, protective devices, equipment mounting, preventive maintenance, documentation and professional customer handling. Survey the site for supply capacity, earthing, ventilation, cable route, mounting strength and service access.
303 words, about 2 min