The Technical Test Battery (TTB2) is suitable for selection testing of technicians, potential trainees, and engineering technicians. It includes three subtests: Mechanical Reasoning, Spatial Reasoning and Visual Acuity. Together with the General Reasoning Test Battery, it gives a comprehensive assessment of the abilities relevant to technical training and work.

The Spatial Reasoning Subtest measures spatial ability through items that include visualising patterns in 3D, and matching 3D objects to 2D patterns. The Visual Acuity subtest measures the ability to work with highly detailed technical material (such as wiring or circuitry). The test involves following a pathway through a complex maze, thereby measuring visual and attentional capacity which is relatively independent of general ability. This subtest is particularly useful for roles that involve technical repairs, electronic circuitry and checking related components. Due to the nature of this assessment, this particular subtest is only available for online administration – the other two subtests are available via paper-and-pencil as well as online.