ITI/NCVT Mechanic Machine Tool Maintenance (AITT Theory)

Multiple-choice with a single correct answer, delivered on OMR sheets or by computer as the session is notified. Each AITT subject - trade theory, workshop calculation and science, engineering drawing, employability skills - is a separate paper. You write no descriptive answers, so quick reading and eliminating wrong options matter more than writing style.

Those figures are set by the National Council for Vocational Training and can change between sessions, so no number is quoted here. Check the current AITT scheme of examination and your admit card on the official NCVT/DGT portals, or ask your institute's exam cell before you plan revision timing.

Moderate, and wide rather than deep. Few questions need heavy calculation; most check whether you recognise a component, a symbol, a fault symptom or a correct procedure. The usual mistake is preparing only for your favourite machine. Marks are spread across every domain, so untouched topics cost you more than difficult ones do.

Yes. NCVT trade tests run in sessions, and failed or missed subjects can normally be attempted in a later session under the rules in force at that time. The exact provision, fee and application window are notified by NCVT and your state directorate, so confirm your eligibility with the institute before the next form date.

Begin with the heavy blocks: maintenance systems and fault diagnosis, fitting and alignment, installation and geometric accuracy testing, machine elements and drives. Then cover bearings and lubrication, hydraulics and pneumatics, metrology, and materials. Keep workshop calculation and engineering drawing as short daily slots instead of a final-week cram.

Losing marks on units and conversions, confusing clearance with interference fits, mixing hydraulic and pneumatic symbols, forgetting which geometric test checks which error (straightness, squareness, parallelism, runout), and skimming the question stem. Drawing conventions - section lines, hidden detail, surface roughness symbols - are also frequently weak.

No. You need working familiarity - what an H7/g6 fit means, how to read a limit dimension, what a bearing designation tells you - not page memory. Questions test whether you can apply a standard to a shop situation. Where a table is genuinely required, it is usually supplied or the question is qualitative.

Practise orthographic and sectional views from real parts, read assembly drawings and identify each component's function, learn limits, fits and tolerance notation, surface roughness and welding symbols. Drawing is the paper candidates most often neglect, and a steady twenty minutes a day is usually enough to hold it.

NCVT awards grades and issues the National Trade Certificate using theory and practical marks together. The passing marks and grading bands are fixed by NCVT and published in the current AITT scheme, so your institute can tell you exactly where the cut-offs fall for your session.

A simple non-programmable calculator is normally permitted for workshop calculation and science, but permitted aids are stated in the session instructions and can be restricted for computer-based delivery. Confirm with your exam cell, and practise the arithmetic by hand anyway so you are not caught short.