Not sure if it always true, but you are supposed to have certain answers for certain questions. If you don't then it can be assumed you are being untruthful.
Do you drive faster than the speed limit a) never b) some of the time c) only when I am late
Not where I work. We have to take these tests every time we apply for a promotion/transfer, the first did I took one I would occasionally select the second to best answer so it would look like I was being honest. One of my managers told me that they can't even see your answer, rather it just composites a total score, so it's best just to select the obvious best answer every time.