The aptitude is an innate, learned or acquired ability. It is part of the psychometric tests at the assessment centre (the other part being personality tests, personal abilities, attitude and more). Aptitude tests are mainly made to assess intelligence and knowledge.he purpose of the aptitude test is to test your work related perceptions, judgement and reasoning. In other words, your day to day activities on the job. In an aptitude test there is one correct answer, however the key to the test is how quickly you are able to arrive at the correct answer. As such, aptitude tests are carried out under timed conditions. Often the time constraints are such that the test has been designed so that only 1 - 5% of the population will be able to solve all the questions in the time provided.