1. True or False: 1) Without dimensions, parts cannot be manufactured correctly. 2) Dimension lines are always thick lines. 3) Surface finish shows how smooth a surface must be. 4) ISO standards are used only in one country. 5) Tolerances guarantee correct function of parts.

1. True. Dimensions provide the measurements needed to manufacture a part correctly.
2. False. Dimension lines are normally thin lines.
3. True. Surface-finish symbols indicate the required smoothness or roughness of a surface.
4. False. ISO standards are international standards used in many countries.
5. True. Proper tolerances help ensure that parts fit and function correctly.

Answer: 1) True; 2) False; 3) True; 4) False; 5) True.