Which mechanical aptitude test will I be given?

Ask the employer — it is a fair question and the answer changes the pace you should rehearse at. The Bennett runs at 27.3 seconds an item and the Wiesen at 30, and the two are the overwhelming majority of what gets sent.

Is the Bennett harder than the Wiesen?

Neither publisher publishes anything that would let you compare difficulty, and the two are normed separately, so a percentile on one is not a percentile on the other. The Bennett is item-banked and weights items by difficulty; the Wiesen is a straight count out of 60 written at a sixth-grade reading level.

How do I study for a mechanical aptitude test?

Learn the handful of rules that decide most items — gear direction, speed and size, rope parts, lever classes, pressure and depth — then do timed sets until the reasoning is automatic rather than reconstructed. The tests are paced tightly enough that fluency matters more than knowledge.

Can I use a calculator?

Neither publisher publishes a rule, which means nobody honestly knows but your employer. The arithmetic is small by design, so practising without one removes the question.

What is a good score on the Bennett or the Wiesen?

There is no published answer. Both are reported to the employer with a percentile, and the employer sets its own bar for its own roles. Anyone printing a target score by job title has invented it.

Bennett or Wiesen: which mechanical test?

“You’ll be taking a mechanical aptitude test” is not the name of a product. Two tests dominate the category, published by different companies at different lengths, and prep sites report their question counts interchangeably — which is why the numbers you find online contradict each other. Here is what each publisher actually prints, and what both are testing underneath.

The two shapes

Both figures below are from the publishers’ own product pages. They are the only question counts in this category that come from a publisher rather than from a prep site quoting another prep site.

	Bennett (BMCT-II)	Wiesen (WTMA)
Publisher	Pearson TalentLens	Criteria Corp
Length	55 items, 25 minutes	60 items, 30 minutes
Pace	27.3 seconds an item	30 seconds an item
What the publisher says it measures	Mechanical reasoning and spatial perception; solving technical problems, learning mechanical concepts quickly, and applying physical principles	Mechanical aptitude — the ability to learn to use and maintain equipment and machinery
Scoring	Item-banked: each item weighted for difficulty, reported with a percentile alongside the number correct	A raw score out of 60 plus a percentile ranking
Reading level	Not published	Estimated sixth grade; a Spanish version exists
Content areas named	Includes electricity, heat and hydraulics	Not broken down

From talentlens.com and criteriacorp.com, both read 3 September 2026.

Neither publisher breaks its test into a count per topic, so nobody can honestly tell you how many gear questions to expect. Neither publishes a passing score either — employers set their own and do not disclose them.

What both are really testing

Underneath the two products is one idea repeated in different clothes: a machine multiplies force and charges for it in distance. A lever, a ramp, a screw, a block and tackle and a gearbox are all that same bargain, and once you can see which side of it a picture is showing, a large share of either test answers itself.

The rest is everyday physics about what tips, what slides and what keeps going — and, on the Bennett explicitly, three areas candidates rarely revise: pressure and flow in pipes and tanks, how heat moves, and what happens to a circuit when one part of it opens.

Meshed gears turn opposite ways; an odd number of them leaves the last turning with the first
An uncrossed belt keeps both pulleys turning the same way — the opposite of gears
Speed goes down as size goes up, and turning force goes up as speed goes down
A block and tackle multiplies your pull by the number of rope parts on the load, and you pull that many times as much rope
A lever’s class is decided by what sits in the middle: fulcrum, resistance or effort
Pressure at the bottom of a tank depends on its depth, not its width
One open switch stops a whole series circuit and only its own branch in a parallel one

The one thing a written page cannot practise

On both tests, a typical item is a drawing: two gears with an arrow, a lever with a marked fulcrum, water standing in connected vessels. The reasoning is exactly what written questions ask for, but reading the diagram is a separate skill and it is the one people are slowest at.

The best free source of the drawn kind is an unexpected one — the California firefighter written test’s official study guide, which teaches gears, pulleys, block and tackle, levers and head pressure with diagrams and worked answers, and is published free by the body that runs the test. It is linked from this site’s firefighter pages and is worth an hour whatever job you are applying for.

Where else this test hides

Mechanical reasoning is often a section inside a larger hiring test rather than a test on its own. It is 25 of the 100 questions on the FCTC firefighter written exam. FPSI lists mechanical reasoning among what its firefighter prep covers. Apprenticeship batteries test the same habits of mind through algebra and reading instead.

Which is worth knowing for a practical reason: if you are preparing for one of those, the mechanical practice on this site is the same material, and if you are preparing for a Bennett or a Wiesen, the firefighter mechanical set here is more of it in a different setting.

Now find out what the clock does to you.

A full-length timed run, free, with a score by section and an explanation for every question afterwards.

Take a timed test

Frequently asked

Which mechanical aptitude test will I be given?: Ask the employer — it is a fair question and the answer changes the pace you should rehearse at. The Bennett runs at 27.3 seconds an item and the Wiesen at 30, and the two are the overwhelming majority of what gets sent.
Is the Bennett harder than the Wiesen?: Neither publisher publishes anything that would let you compare difficulty, and the two are normed separately, so a percentile on one is not a percentile on the other. The Bennett is item-banked and weights items by difficulty; the Wiesen is a straight count out of 60 written at a sixth-grade reading level.
How do I study for a mechanical aptitude test?: Learn the handful of rules that decide most items — gear direction, speed and size, rope parts, lever classes, pressure and depth — then do timed sets until the reasoning is automatic rather than reconstructed. The tests are paced tightly enough that fluency matters more than knowledge.
Can I use a calculator?: Neither publisher publishes a rule, which means nobody honestly knows but your employer. The arithmetic is small by design, so practising without one removes the question.
What is a good score on the Bennett or the Wiesen?: There is no published answer. Both are reported to the employer with a percentile, and the employer sets its own bar for its own roles. Anyone printing a target score by job title has invented it.

Sources

Every figure on this page comes from one of the documents below, with the date it was read. Requirements change; if a source has moved on since that date, the source is right and this page is out of date.

Pearson TalentLens — Bennett Mechanical Comprehension Test (BMCT-II) assessment page Read September 3, 2026
Criteria Corp — Wiesen Test of Mechanical Aptitude (WTMA) Read September 3, 2026
Firefighter Candidate Testing Center (Cal-JAC) — FCTC Written Test Study Guide (free candidate guide, 25 pages) Read September 3, 2026

Page facts last verified September 3, 2026.

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Hiring Test Practice is independent practice material and is not affiliated with, endorsed by, or authorized by Criteria Corp, Wonderlic, Inc., National Testing Network, the electrical training ALLIANCE, the International Brotherhood of Electrical Workers, NECA, Biddle Consulting Group, Inc., Pearson Education, Inc. or its TalentLens business, the California Firefighter Joint Apprenticeship Committee or the Firefighter Candidate Testing Center, Fire and Police Selection, Inc., I/O Solutions, Inc., Ergometrics & Applied Personnel Research, Inc., the International Association of Fire Fighters or the International Association of Fire Chiefs. CCAT® is a registered trademark of Criteria Corp; Wonderlic® is a registered trademark of Wonderlic, Inc.; CritiCall is a trademark of Biddle Consulting Group, Inc.; Bennett Mechanical Comprehension Test is a trademark of Pearson Education, Inc.; FCTC and CPAT are used to name tests administered by others. Test names are used only to describe what this material prepares you for. Every question here is original and none is taken from any actual assessment. Cal-JAC and FCTC publish that materials supplied directly by them are the only authorized FCTC Written Test materials; this site is one of the outside sources that warning refers to, and it links their free study guide rather than reproducing it.