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IAT consists of 60 questions: 15 questions each from Biology, Chemistry, Mathematics, and Physics. Total time for answering the test is 3 hours. Questions are of multiple choice type with only one correct answer. Each correct answer is awarded 4 marks. Each incorrect answer leads to the deduction of 1 mark. Unanswered questions are awarded 0 mark.
Out of 65 questions, 10 questions will be from General Aptitude (Verbal and Numerical ability) and 55 questions will be Technical, based on the Paper chosen. The General Aptitude section will have 5 One-mark questions and 5 Two-mark questions, accounting for about 15% of total marks.
The raw score is a measure of how many questions (out of the 60 total) the individual answered correctly, and the percentile ranking is a relative performance score that indicates how the individual's score rates in relation to the scores of other people who have taken this particular mechanical aptitude test.
The Armed Services Vocational Aptitude Battery (ASVAB) is a multiple choice test, administered by the United States Military Entrance Processing Command, used to determine qualification for enlistment in the United States Armed Forces.