100+ Free ITI Mechanic Auto Body Painting (AITT Theory) Practice Questions

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Sample ITI Mechanic Auto Body Painting (AITT Theory) Practice Questions

Try these sample questions to test your ITI Mechanic Auto Body Painting (AITT Theory) exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which type of respirator is mandatory when spraying polyurethane-based clearcoats in a paint booth?

A.Simple paper dust mask

B.Surgical mask

C.Air-supplied respirator

D.Standard N95 particulate mask

Explanation: Polyurethane clearcoats contain isocyanates, which are highly toxic chemicals. Standard charcoal cartridge or particulate masks do not block isocyanates adequately. Trainees must use a fresh air-supplied respirator to avoid severe respiratory injury during paint spraying.

2Which class of fire extinguisher is specifically designed to suppress fires involving paint thinners and solvents?

A.Class A

B.Class B

C.Class C

D.Class D

Explanation: Class B fire extinguishers are designated for flammable liquids such as paints, solvents, thinners, and fuel. Paint thinners are highly volatile hydrocarbons, making Class B extinguishers mandatory in the mixing room and paint booths. Trainees must be certified in using these devices properly.

3What is the primary danger associated with storing solvent-soaked rags in an open container?

A.Solvent evaporation leading to dry rags

B.Spontaneous combustion

C.Discoloration of the floor surface

D.Loss of rag cleaning effectiveness

Explanation: Solvent-soaked rags can undergo exothermic oxidation when exposed to oxygen. If they are piled in an open container, heat builds up until it reaches the ignition point, causing spontaneous combustion. They must be stored in a self-closing, airtight metal container.

4Which tool should be used to gently remove dust particles from a panel immediately before spraying paint?

A.Steel wire brush

B.Microfiber cloth with degreaser

C.Tack rag

D.Coarse sanding block

Explanation: A tack rag is a sticky cloth designed to collect light dust, lint, and hairs from a surface without leaving adhesive residue. It is used as the final step before paint application to ensure a clean surface. Using it prevents dust particles from being trapped under the new paint layer.

5What does a blue safety sign indicate in an automotive body workshop?

A.Danger or emergency stop

B.Mandatory action required

C.Warning of hazardous materials

D.Safe conditions or location of first aid

Explanation: Safety signs are color-coded to communicate information quickly. Blue signs indicate mandatory actions, such as 'Wear Eye Protection' or 'Use Dust Mask'. Trainees must learn safety signage as part of OSH guidelines.

6When operating a dual-action (DA) sander, what is the best practice to prevent gouges in the panel?

A.Tilt the sander on its edge to focus on high spots

B.Keep the sanding pad perfectly flat against the surface

C.Apply maximum downward force on the sander body

D.Run the DA sander at its highest RPM on sharp edges

Explanation: Keeping the sanding pad flat ensures even distribution of cutting force. Tilting a DA sander concentrates pressure on the edge, causing deep gouges or removing too much material. Safe tool handling prevents sheet metal damage.

7Which safety device must be checked and drained daily on a shop air compressor system?

A.Pressure regulator dial

B.Air compressor water trap/drain valve

C.Oil level sight glass

D.Suction air intake filter

Explanation: Compressed air systems generate moisture as air cools. Draining the compressor water trap daily prevents water from travelling down the lines and contaminating the paint. It also prevents internal rust in the air storage tank.

8Under DGT workshop safety and hazardous-chemical handling guidelines, what documentation must be readily available for every paint product in the shop?

A.Sales invoice and warranty sheet

B.Safety Data Sheet (SDS)

C.Automotive registration card

D.Marketing catalog of paint options

Explanation: Safety Data Sheets (SDS) contain crucial safety information, including chemical hazards, protective equipment, first aid, and storage requirements. These sheets must be accessible to all trainees working with paints, solvents, and hardeners.

9What is the recommended procedure for disposing of chemical paint sludge from the wash tank?

A.Flush it down the storm water drain

B.Collect and dispose of it as hazardous industrial waste

C.Mix it with sawdust and throw it in the regular bin

D.Bury it in the ground behind the workshop

Explanation: Paint sludge contains toxic heavy metals and synthetic resins. It is classified as hazardous waste and must be collected in closed barrels for disposal by an authorized waste management agency. Environmental protection is key in DGT curricula.

10Which parameter must be checked on an electric orbital sander before starting any sanding task?

A.Battery voltage level

B.Power cord insulation integrity

C.Water tank fill level

D.Air compressor pressure

Explanation: Because body shops often have wet floors or metal dust, electric tools present a high shock hazard. Inspecting the insulation of the power cord ensures no exposed wires can cause electrocution. Any damaged cords must be tagged and repaired.

About the ITI Mechanic Auto Body Painting (AITT Theory) Exam

Mechanic Auto Body Painting is a one-year engineering CTS trade delivered through ITIs. Trainees learn safety precautions, selection and use of tools, sheet metal surface preparation, rust and paint removal, filler application and sanding, spray gun selection, maintenance and settings, mixing ratios, application of primers, sealers, basecoats and clearcoats, color matching/shading, defect troubleshooting, and basic workshop science and calculations.

Assessment

Summative AITT under DGT/NCVT for the one-year CTS Mechanic Auto Body Painting trade (NSQF Level 3; 1200 notional hours + 150 hours OJT/group project). Engineering-trade CBT: 75 MCQs / 150 marks in 2 hours — Trade Theory 38 + Workshop Calculation & Science 6 + Engineering Drawing 6 (100 marks) and Employability Skills 25 (50 marks). Trade Practical is assessed separately; formative (internal) assessment is maintained by the ITI. Successful candidates receive the National Trade Certificate (NTC).

Time Limit

2 hours for CBT (AITT July 2026 DGT guidelines). Practical duration follows the DGT/State Directorate schedule for the sitting.

Passing Score

33% minimum in Trade Theory and in Employability Skills; 60% minimum in Trade Practical and Formative Assessment (DGT CTS pass regulation / AITT July 2026 guidelines). No grace marks.

Exam Fee

CBT fee ₹213 per trainee for AITT July 2026 mains (plus applicable payment-gateway charges). Practical and other institute fees are notified separately on SIDH — confirm with your ITI. (Directorate General of Training (DGT) / National Council for Vocational Training (NCVT))

ITI Mechanic Auto Body Painting (AITT Theory) Exam Content Outline

15%

Safety and Tools

OSH guidelines, PPE selection, fire safety, hand/power tools, safety symbols, and waste management.

25%

Surface Preparation

Paint and rust stripping, body fillers, guide coats, masking, sanding grids, and panel degreasing.

20%

Refinishing Materials

Primers (etch/epoxy), fillers, surfacers, sealers, single/multi-stage paint systems, clearcoats, and safety data sheets.

15%

Spray Equipment and Systems

HVLP spray gun adjustment, gravity/suction feed, air compressor line maintenance, and pattern controls.

15%

Paint Application and Shading

Flash off times, wet coat application, blending techniques, shading, metallic paint alignment, and spot repair.

Defects and Troubleshooting

Orange peel, runs/sags, fisheyes, paint mapping, solvent popping, peeling, and corrective buffing/polishing.

Workshop Math and Science

Viscosity Ford Cup seconds, mixing ratios (e.g. 2:1, 4:1:1), paint coverage area, and air pressure conversions.

How to Pass the ITI Mechanic Auto Body Painting (AITT Theory) Exam

What You Need to Know

Passing score: 33% minimum in Trade Theory and in Employability Skills; 60% minimum in Trade Practical and Formative Assessment (DGT CTS pass regulation / AITT July 2026 guidelines). No grace marks.
Assessment: Summative AITT under DGT/NCVT for the one-year CTS Mechanic Auto Body Painting trade (NSQF Level 3; 1200 notional hours + 150 hours OJT/group project). Engineering-trade CBT: 75 MCQs / 150 marks in 2 hours — Trade Theory 38 + Workshop Calculation & Science 6 + Engineering Drawing 6 (100 marks) and Employability Skills 25 (50 marks). Trade Practical is assessed separately; formative (internal) assessment is maintained by the ITI. Successful candidates receive the National Trade Certificate (NTC).
Time limit: 2 hours for CBT (AITT July 2026 DGT guidelines). Practical duration follows the DGT/State Directorate schedule for the sitting.
Exam fee: CBT fee ₹213 per trainee for AITT July 2026 mains (plus applicable payment-gateway charges). Practical and other institute fees are notified separately on SIDH — confirm with your ITI.

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

ITI Mechanic Auto Body Painting (AITT Theory) Study Tips from Top Performers

1Focus heavily on Surface Preparation and Refinishing Materials, as they together make up 45% of the syllabus, covering sanding grit sequences, primer types, and body filler techniques.

2Understand the mechanics of spray guns and compressed air lines, especially the causes of common defect patterns like fisheyes (oil/water contamination) and orange peel (incorrect viscosity or air pressure).

3Practice mixing calculations and viscosity cup timings, as these represent practical-theoretical math questions frequently asked in the Trade Theory block.

Frequently Asked Questions

What is the ITI/NCVT Mechanic Auto Body Painting AITT theory exam?

It is the All India Trade Test theory CBT administered by DGT for trainees completing the one-year CTS Mechanic Auto Body Painting course at ITIs. Engineering-trade CBT covers Trade Theory (with Workshop Calculation & Science and Engineering Drawing) plus Employability Skills; a separate Trade Practical exam is also required for the National Trade Certificate.

How many questions and how much time are in the AITT CBT?

Per DGT AITT July 2026 guidelines, the CBT is 75 multiple-choice questions for 150 marks in two hours: 50 questions (100 marks) in the Trade Theory block (38 trade theory + 6 WSC + 6 engineering drawing) and 25 Employability Skills questions (50 marks).

What are the pass marks for Mechanic Auto Body Painting AITT?

DGT requires at least 33% in Trade Theory and 33% in Employability Skills, and at least 60% in Trade Practical and Formative Assessment. There are no grace marks. Confirm any session-specific notifications on the DGT exam corner or SIDH.

What is the CBT examination fee?

For AITT July 2026 mains, DGT notified a CBT fee of ₹213 per trainee (plus payment-gateway charges), payable online via SIDH. Practical fees are separate — ask your ITI for the exact amount for your sitting.