Test of Mechanical Concepts

THIS ASSESSMENT IS NOT CURRENTLY AVAILABLE – Assesses mechanical interrelationships/tools & devices/spatial recognition.


Special Announcement

We regret to announce that as of February 2019 the publisher of this product has temporarily  discontinued it.  Until further notice it is no longer available for purchase.  Our hope is that it may be reinstated at some point in the future and/or be re-offered in an online format.  However, we do not know when, or if, that will occur.  We apologize for the inconvenience that this creates for current users.  We will be glad to help you select an alternate product in the meantime – if a suitable substitute exists.  Please contact us for recommendations.


The Test of Mechanical Concepts is an untimed test of basic mechanical ability. It is designed to measure an individual’s ability to visualize and understand basic mechanical and spatial interrelationships. It is also a measure of an individual’s knowledge of common mechanical tools and devices.

Two scoring forms are available. Both A and B are designed for use in a variety of industrial and education settings. The test is appropriate for evaluating individuals for hire, promotion or training for such jobs as assembler, maintenance mechanic, machinist, factory production worker and for any other job that requires the ability to understand mechanical concepts.

The TMC may also be used to test individuals at all educational levels from junior high school through college. It is a useful test for the vocational counselor who is interested in measuring individual differences in mechanical aptitudes.

Both forms A and B are untimed equivalent-form tests consisting of three subtests, each of which measures a separate skill or ability necessary for performance in those jobs requiring mechanical ability.

Mechanical Interrelationships: measures an individual’s ability to understand mechanical and spatial relationships. The subtest consists of twenty-four drawings that depict mechanical movements and interrelationships. The examinee responds to questions related to the drawings by marking one of up to five alternatives. In order to answer these items successfully, an individual must understand basic mechanical concepts.

Mechanical Tools and Devices: measures an individual’s knowledge of common mechanical tools and devices. The subtest contains thirty items, with five alternative answers, that refer to an accompanying drawing of a mechanical tool or device. The examinee must either identify the name of the tool or device or identify what it is used for. One of the alternatives is clearly the correct answer. The other four alternatives will seem plausible to an individual who has only a limited knowledge of mechanical tools.

Spatial Relations: measures an individual’s ability to visualize and manipulate objects in space. The examinee is presented with four key geometric figures. Each of the twenty-four items consists of one of the key figures cut up into two or three-piece segments. The individual must identify which of the key figures is represented by the cut-up.

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