On 26/05/2017 14:26, NY wrote:
"Bill Wright" wrote in message
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As has been said though, in the context of the question, where all the
other alternatives simply had variations on right angle joints and no
brace, its the only clear correct answer.

It's the correct answer but it shows that the author has no idea about
basic joinery techniques.

No, all it is saying is that the one with the diagonal bar is much
better than any of the other ones in the question,

But why present an answer that relies on an incorrect depiction when it
could be a correct one? The only possible reason is that the author must
have no idea about how to make a gate and never bothered to ask a
joiner. That's very sloppy.

Since the thing is supposed to be about engineering principles and not
the behaviour of wood the correct answer will be the gate that used the
brace to form a triangle for strength, and nothing to do with the wood
warping. On that basis the gate as shown is just plain wrong.

It doesn't mention that the gate is made of wood, so the 'wood' argument
clearly wrong.

Bill