technicalquiz.com is an free portal by using you can gain your knowledge in mechanical engineering subject and also post your question and start the discussion in technical discussion .
I could understand one quick thread to get some exposure, but when they use these tactics it has the opposite effect. Even if it's a good site, I won't open it. Registering probably starts a flood of email spam.
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Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety. Ben Franklin