Just look at every question, and before you answer, say to yourself, "How would an airline pilot answer this?"
This is where so many go wrong......
Unfortunately, these tests are designed so that if you give the answer you THINK THEY WANT rather than what you really think, then later on in the test you will end up contradicting yourself.
The same question is usually asked a few times throughout the test, however it may be worded in a slightly different way. So when you start giving anything but honest answers, it will show up in your test results.
My advice for the psychometric tests is to just be as honest as possible. From memory, they usually give you a scenario with 4 or so responses, and ask you to state which answer is most like you and which is least like you. With some, you will look at the answers and go, 'none of these are anything like me', but you still have to choose.
True, you cant really practice for these tests...but you can always have a look at some sample questions and see what sort of things they ask. Try the QF website.....im pretty sure there used to be some examples of the formats and types of questions they ask, so i cant imagine V would be much different.
Best of luck with your testing.