JDF Recruit Assessment common mistakes
JDF Recruit Assessment · Understand the traps and how to avoid them.
Spending the same time on every verbal reasoning item instead of skipping long passage-based questions and returning to them later.
Candidates treat all questions as equally costly and run out of time before reaching easier synonym/antonym and logic items later in the section.
What to do instead
Do a first pass answering only items solvable in under 45 seconds, flag the rest, and use remaining time on flagged items; practise with a visible timer to build the habit.
Answering verbal logic questions from personal opinion or real-world plausibility rather than from the statements given.
Everyday knowledge feels more reliable than abstract syllogisms, so candidates import assumptions the question forbids.
What to do instead
For each item, write the premises in shorthand and ask only whether the conclusion follows necessarily; treat the statements as the entire universe of facts.
Rushing the final step of multi-step numerical problems, such as giving the intermediate value instead of the requested final figure.
Under time pressure candidates stop reading once they recognise the calculation pattern and answer the wrong quantity.
What to do instead
Before calculating, underline what the question asks for (unit and quantity) and check the answer against it; build a habit of a five-second final reread.
Misaligning decimal places or units when working with rates, ratios, and percentages without writing out the working.
Mental arithmetic shortcuts collapse under pressure, and unit conversions (minutes to hours, cm to m) are silently skipped.
What to do instead
Always write the full equation with units attached and cancel them; convert all quantities to consistent units before computing.
Guessing at mechanical advantage or gear direction without tracing the system step by step.
Candidates pattern-match on familiar images and assume, for example, that meshed gears turn the same way or that a longer lever always reduces effort regardless of pivot position.
What to do instead
Redraw the system as a simple sketch, mark rotation arrows at each stage, and compute mechanical advantage from the formula rather than intuition.
Confusing force, pressure, and energy concepts when answering applied questions about levers, pulleys, and hydraulics.
These quantities share everyday language and candidates rely on loose associations rather than definitions.
What to do instead
Memorise one-line definitions and units for each (force in newtons, pressure as force over area, work as force times distance) and apply the matching formula explicitly.
Losing track of orientation when mentally rotating or folding shapes, especially mirror-image versus rotation distinctions.
Mental rotation is effortful and candidates accept the first option that looks close rather than checking chirality and fold lines.
What to do instead
Use a physical reference such as the edge of the page or your hand to anchor orientation, and eliminate options by checking one distinctive feature at a time.
Rushing spatial reasoning items and answering from a quick glance instead of systematically eliminating options.
Spatial items feel intuitive, so candidates under-invest time early and then have no strategy when a hard item appears.
What to do instead
Apply a fixed routine: identify the key feature, test each option against it, and cross out rather than search for the right answer.
Relying on outdated or vague general knowledge and guessing on current affairs rather than reasoning from what is known.
Candidates either overestimate their recall or freeze on unfamiliar items, wasting time that could be spent on answerable questions.
What to do instead
Review a recent periodical digest of national and international events before the test, and on unfamiliar items eliminate implausible options before guessing.
Starting the physical fitness battery at full effort and fading badly in later events such as the run or shuttle.
Adrenaline and nerves push candidates to sprint the early stations, leaving insufficient energy for endurance components that are scored cumulatively.
What to do instead
Rehearse the full battery in the prescribed order during training, set target splits for each event, and pace the opening stations to conserve energy for the run.