Question

9. If the nominal diameter of the rivet is 20 mm,
then gross diameter will be
(a) 20 mm
(b) 21.5 mm
(C) 22 mm
(d) 18.5 mm.
ANGWE​

Answer 1

Answer:

The diameter of a rivet hole is equal to the nominal diameter of the rivet plus 1.5 mm for rivets nominal dia up to 25mm, and 2mm for rivet nominal dia above 25mm.

Answer 2

Answer:

The gross diameter of the rivet is found to be option (b) 21.5 mm.

Explanation:

We know that the relationship between the nominal diameter and the gross diameter, when they are represented by $n$ and $g$ respectively, is given by the two cases given below:

Case-1: When $n < 25mm$: $g=n+1.5mm$

Case-2: When $n > 25mm$: $g=n+2mm$

Now, we are given nominal diameter as 20 mm, thus the gross diameter is found to be:

$g=20mm+1.5mm=21.5mm$

Thus the gross diameter of the rivet is 21.5 mm.

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