Most of the things that an examiner check in the test are basic standards and common sense. However, there are few other common occurring scenarios and each examiner has a different view on this and is mostly frustrating.
My friend got a minor on making a right from 40 to 30 mph road where a separate lane is created for turning right by breaking the central reserve area. Unfortunately, the lane is not visible until you reach quiet close and the right turn has no sign or signal. She got minor because she slowed down on 40 road without entering the new right lane of few yards length only just for the right turn even though she did looked there was no one behind. Could have got a major is someone is behind and had to change direction or speed.
Funny enough, when I gave the test from the same test centre but with the lady examiner, I got a major at the same spot to not to reduce the speed on 40 mph lane. She though I wouldn't be able to apply brakes in time for the car further ahead, but I have driven the car in India for 10 years and have very easily managed the situation without causing hazard to the card in front of the new short right lane for right turn and the car coming in lane I moved from. I started applying the brakes to stop well before the car in front in the new lane but for some reason, the examiner panicked and applied emergency brakes. She did acknowledged that I was applying the brakes, but when we reached back the test centre, she failed me :-(
I wouldn't have bothered if I would have failed because of my serious mistake but this failure is attributed to the double standards of the examiners and no objectivity in this part of the test...
I got only 6 minors otherwise, which I am sure even the examiners will get if they will be in our position - its not too difficult to find faults in others.
My experience from my test is that apart from the actual driving, one can fail because of sheer luck or shall I say bad luck :-(
So without any disappointment, try till you succeed - I know this will cost you but you have no other choice.