ITI Interview – Mechanical/Manufacturing Trades — 15 trades, 300 interview questions. Click a trade to see its 20 Q&A. Fitter 20 Q&A Q1. What does a Fitter do? A Fitter assembles, fits, and repairs machine parts and mechanical components using hand tools and machine tools, ensuring parts fit together with correct alignment and tolerance. Q2. What is a try square used for? A try square checks whether two surfaces of a workpiece are exactly at 90 degrees to each other, and is also used to mark perpendicular lines. Q3. What is the difference between a file and a hacksaw? A file removes material by rubbing its toothed surface across a workpiece to smooth or shape it, while a hacksaw uses a thin, toothed blade to cut through metal. Q4. What is a vernier caliper used for? A vernier caliper measures internal, external, and depth dimensions of a workpiece with high precision, typically to an accuracy of 0.02mm. Q5. What is marking in fitting work? Marking is the process o...