Written test.. was Rim thingy..

[Delwin D Fandrich]

----- Original Message ----- 
From: "Dave Nereson" <davner@kaosol.net>
To: "Pianotech" <pianotech@ptg.org>
Sent: September 03, 2003 1:45 AM
Subject: Re: Written test.. was Rim thingy..


>     Another is "The greatest percentage of expansion and contraction in a
soundboard is
>         A. across the width of the board
>         B. in the thickness of the board
>         C. along the length of the board
>         D. even in all directions             ."
> The correct answer [is it?] is B.    Does a spruce board really expand
and contract in thickness more than across the grain?    And, really, it
should say "...expansion and contraction with changes in humidity (as
opposed to temperature or other factors) ...."



As written, yes, the correct answer is (B). The key words being "greatest
percentage." A piece of wood, whether spruce or whatever, expands least
longitudinally with the grain, next perpendicularly with the grain and most
tangentially. In a soundboard panel this would be in thickness. Of course
it's a rather silly question, but that's another issue.

Del