TTB2 and TTBi measure the core skills that are required for selecting and assessing staff for engineering apprenticeships, craft apprenticeships or technical training. They consist of four tests, which can be administered individually or together, Mechanical Reasoning, Spatial Reasoning, Visual Acuity and Fault Finding.

TTB2 and TTBi identify the ability to understand technical concepts and put them to practical use, making it an essential assessment tool for anyone being considered for roles where technical ability is a job requirement.

Mechanical Reasoning measures the ability to understand mechanical concepts and physical principles in operation. The items have been selected from a wide range of areas (including optics, electrics, fluids and mechanics) so users can be confident that they are measuring a broad range of mechanical reasoning ability.

Spatial Reasoning measures spatial ability through items that assess the ability to visualise patterns in three dimensions and match three-dimensional objects to two-dimensional patterns. The items have been selected to represent a wide range of shapes (e.g. cubes, pyramids, cones, rhomboids, and an innovative variety of other multi-faceted shapes). Therefore, users can be confident they are measuring a broad range of spatial/diagrammatic ability.

Visual Acuity has been specifically designed for on-screen assessment and measures the ability to work with highly detailed technical material such as wiring or circuit diagrams. The test involves following a single pathway through a complex maze and assesses visual and attentional capacity which is relatively independent of general ability. The Visual Acuity Test has been specifically developed for roles which involve checking, repairing and replacing electrical/electronic circuitry and components.

Fault Finding measures the skill of detecting and locating faults in control systems or operation processes. The items of this test present the test-taker with systems of nodes with notation of the effect of each node, and input in the form of four ‘lights’ or ‘buttons’ that can be on or off. The task is to identify the dysfunctional node or if there is wrong input, by means of using logical reasoning and ability of elimination. The ability measured by this test is relevant for technical personnel and engineers that work with fault-prone systems.

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