Mechanical prints practice test
20 mixed questions from every mechanical prints lesson. Pick your standard, then work through them.
What is the nominal (major) diameter?
What this test covers
Each question comes from one of these lessons. If a topic trips you up, go back to that lesson for more practice.
- Dimension symbols: Diameter, radius, square, reference and basic dimensions, counterbore, countersink and depth.
- Tolerances and limits: Bilateral, unilateral and limit dimensions. Largest size, smallest size and total tolerance.
- Limits and fits: Clearance, transition and interference fits. ISO hole and shaft codes like H7/g6.
- Thread callouts: Read 1/4-20 UNC-2A and M10x1.5-6H: size, pitch, series and internal or external.
- Surface finish symbols: The check mark, the bar and the circle, roughness values and lay symbols.
- Work out the limits: Largest size, smallest size and total tolerance, typed to the last decimal place.
- Read a part drawing: A full part print with views, holes, tolerances, a feature control frame and a title block. Five questions per drawing.
Explained in our own words and checked against several textbooks and published tables. For the full rules, see ASME Y14.5, ASME Y14.36, ISO 286, ISO 965, ISO 1302 and ISO 21920-1.