2. Choose the correct option: 1) Dimension lines are placed... a) inside the part b) between extension lines c) only outside the drawing 2) A tolerance is... a) the exact position of arrows b) the allowed variation from a given size c) a type of line used for hidden details 3) Surface finish is important because... a) it reduces friction and wear b) it makes the drawing more beautiful c) it shows the color of the material

1. b) between extension lines — dimension lines show the measured distance between extension lines.
2. b) the allowed variation from a given size — a tolerance defines the acceptable range of variation.
3. a) it reduces friction and wear — a suitable surface finish improves contact between moving parts.

Answer: 1) b; 2) b; 3) a.