OAA anyone kindly tell me what to study wise for the assessment ?
I found a good way of preparing myself for airline assessments at FTOs such as OAA or CTC was to use this website;
PAT | PilotAptitudeTest.com - Practise for COMPASS Tests and PILAPT Tests
It had plenty of sample questions in both maths & physics, which were along the same lines as the questions experienced in assessment. It also has hand/eye coordination and other simulator style apps included.
Having taken the assessment for OAA, i found that having used this site it benefited me greatly in my preparation and I went into the assessment feeling more confident in my ability to be successful.
As Naturals says, using the OAA forum also gives some good advice on what can be expected on the day. while having the information on what to expect is greatly beneficial, it is even more beneficial to have practical experience of sample assessments.
If you fail to prepare, be prepared to fail.