Overt questions are things like "are you dishonest".

Veiled questions try to be a bit sneakier. One of the factors they look for is risk taking behavior (going to parties, taking risks, etc). Traders, on the other hand should be keen to take risks.

Of course, there's a lot of other factors the veiled questions look for (asking whether other people are dishonest, looking at attitudes towards punishment) which aren't related to risk-taking.

Ironically, having a harsh attitude towards punishment can indicate dishonesty, possibly because dishonest people think other people are only deterred by the penalties.

I think the idea is that an excerisice bike means you are fitness and performance orientated and able to work toward a arbitrary goal without any obvious reward or it means you are willing to do pointless grunt work instead of something pleasant and interesting - either way you are supposed to say exercise bike