What is the length of the short dashes of the centre lines?

In unidirectional system the dimensions are __

How is tapped hole of diameter 10mm with 20mm dimensioned?

<span style="color: rgb(0, 0, 0); white-space: pre-wrap;">Which symbol represents </span><spa…

<span style="color: rgb(0, 0, 0); white-space: pre-wrap;">Which symbol represents </span><spa…

It is recommended that a gap of about 2 mm should be kept between the extension line and an outline.

In which of the following type of dimensioning, the dimensions are arranged only in a straight line?

Which of the lines is a thin continuous line with the ends terminating in arrowheads and is enclosed by extension lines,…