How the Bennett Mechanical Comprehension Test works
Each question is a simple drawing of a mechanism or an everyday situation, with two things in it labelled A and B and one line of text, such as which of two people is carrying more of a load. You answer A, B, or C. C always means the two are equal, and the question line reminds you: “If equal, mark C.”
There are 55 questions and 25 minutes, after two practice questions that are not timed. The questions come from a large bank, and every candidate’s set has the same balance of topics and difficulty, so no two candidates get the same paper. It is not adaptive: your set is fixed when you start.
TalentLens says the test covers ten topics and names three of them: electricity, heat and hydraulics. The full list is reported as velocity, force and torque, fluids, pulleys, heat, electricity, gears, wheels, acoustics and optics, with motion and forces making up about half the paper. The test is sold for engineering, maintenance, production, skilled trades, airlines and emergency services roles.
This is the current Bennett test, and it is online only. The older version, reported as 68 questions in 30 minutes online or on paper, has the same style of question, so the method below works for both.
How to answer a Bennett question in 27 seconds
You do not have time to calculate, and you do not need to. Every question turns on one principle.
- Read the question line first, twice. “Faster”, “easier”, “more weight” and “greater pressure” ask different things about the same drawing.
- Name the principle: lever, pulley, gear, pressure, circuit, heat. Once it has a name, the answer usually follows.
- Find the one difference between A and B in the drawing: a distance, a size, a depth, a number of ropes. The test is asking what that difference does.
- Choose C only when the principle says the difference does not matter, or when the drawing is truly symmetrical.
- Answer and move on. If you are unsure, tick Review, pick your best answer and come back if time allows.
Worked examples
Three questions in the Bennett style, described in words.
- Two water tanks stand side by side, open at the top. Tank A is wide and shallow. Tank B is narrow and deep. At the bottom of which tank is the water pressure greater? Answer B. Pressure in a liquid depends on depth, not on how wide the tank is or how much water it holds.
- A small gear A drives a larger gear B. Which gear turns faster? Answer A. The teeth pass at the same rate on both, so the gear with fewer teeth has to turn more often.
- A sign hangs from the exact middle of a level bar, and the bar hangs from two ropes, A at the left end and B at the right end. Which rope carries more of the load? Answer C. The load is the same distance from each rope, so they share it equally. Move the sign towards A and the answer becomes A.
How the BMCT-II is scored
The report shows your number correct out of 55, but that is not the figure employers are told to use. Because each candidate gets a different set, the test also works out an ability score that allows for how hard your questions were, and converts it to a percentile against a norm group the employer chooses. T-scores, stanines and stens are reported alongside.
Pearson publishes no pass mark and says the raw number correct should not decide a hiring decision on its own. Scores that preparation sites quote for particular trades are not Pearson’s.
Nothing in Pearson’s guidance takes marks off for a wrong answer, so leave nothing blank.
Tips for the real Bennett test
- Aim for 12 questions every five minutes. At that pace you finish in about 23 minutes, with two left for the ones you ticked.
- Do not skip the easy ones looking for hard ones. Every question counts the same towards the number correct.
- Be wary of C. It is right when the physics says so, not when you cannot decide.
- Revise the handful of principles the test keeps returning to: the load sits heavier on the nearer support, more supporting ropes mean less effort, meshed gears turn opposite ways, pressure follows depth.
- Sit it on a computer. TalentLens recommends a desktop or laptop, not a phone.
Practise the Bennett test on CogniPrep
Our BMCT-II game is a full paper: 55 questions in 25 minutes, answers A, B or C, a Review tick on every question and a review screen before you hand in. Each run draws a fresh 55 from our own bank of 220 questions to a fixed mix of ten topics and three difficulty bands. You can go back and change any answer until time runs out, and unanswered questions count as wrong.
You get your number correct, feedback on your weakest topics and a percentile against other CogniPrep users. Our topic mix is an estimate, since TalentLens does not publish its own, a few heat, sound and light questions are in words without a drawing, and the two practice questions of the real test are left out.