Abstract: The Mechanical Aptitude Test Battery is a set of aptitude tests ofmechanical technical operation designed to meet the actual needs for se-lecting, enlisting and training mechanical technician. It includes twoparts: the paper-and-pencil test and the manual test with altogether thirteensubtests. After pretesting, subject analysis and appropriate sampling,280 technicians were chosen from three technical schools in the Tianjincity and put through the tests. The results showed that the test-retestreliability coefficients of the paper-and-pencil test and the manual testwere 0.83 and 0.92 respectively; the multiple correlation coefficients ofthe two with the subjects' rating scores were 0.44 and 0.57 respectively.

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