Question

Medium thickness, line-group of 2mm are not used for _________​

Answer 1

Answer:

Dimensional lines

Explanation:

Out lines, dotted lines and cutting plane-lines are drawn using 2mm thickness lines. Whereas centre lines, section lines, dimension lines, extension lines, construction lines, leader lines, short break lines and long-break lines are drawn using 1mm thickness lines.

Answer 2

Answer:

Medium thickness, line-group of $2$ mm are not used for Dimension lines

Explanation:

Outlines, dotted lines, and cutting plane lines are all drawn with lines of $2$ mm thickness. Centre lines, section lines, dimension lines, extension lines, construction lines, leader lines, short break lines, and long-break lines are all drawn with $1$ mm lines.

The dimension line is a thin, dark line with arrowheads at both ends. It denotes the direction and size of a dimension. When using fractions and decimals for dimensions in machine sketches and drawings, the dimension line is usually broken near the middle to provide open space for the dimension numerals.