10.1 Mixed-Item Strategy Across Both Batteries

Mixed-item strategy across both batteries

Quick answer: The current pack and Pearson booking page name two Online Cognitive Ability components: Mechanical Reasoning and Core Abilities. Sit them as timed OnVUE batteries with no pens, paper, phones, or calculators. Skip items that stall you; review if time and the function exist. The pack says QFD is not expecting every item correct.

The Queensland Fire Department (QFD) recruit firefighter Online Cognitive Ability Test is an occupational screen. It is not a Year 12 physics paper, not a university entrance exam, and not the later panel interview. Mechanical Reasoning asks you to apply mechanical concepts and principles — the 2024 candidate pack names gears, circuits, kinetic energy, and related ideas — to diagrams and short stems. Core Abilities evaluates knowledge, problem solving, reasoning, and capacity to learn; the pack names four elements: literacy, numeracy, problem solving, and analytical aptitude. Those four elements can appear as different item families in one appointment: vocabulary or analogy, a long operational passage, mental arithmetic, a number sequence, a shape sequence, odd-one-out, a matrix, or a spatial rotation. The mixing is the exam-day problem this section exists to solve.

Earlier chapters taught how to read a gear train, how to keep a literacy option inside the passage, and how to hold units in a ratio. This chapter does not reteach those methods in depth. It answers a different question: what do you do when the software puts a hose-pressure diagram next to a must-be-true paragraph, then a foam-ratio stem, then a 3×3 matrix, with a visible timer and no scrap paper?

You do not get a published item count, a published minutes-per-family split, or a published percentage pass mark. Sitting toward “get 70 percent of gears right, then stop” is a third-party habit, not a QFD rule. The workable strategy is classification plus movement: name the family, apply the matching first-pass method, skip when that method is not landing, and use remaining time only if review is actually available.

Two appointments, two clocks

Pearson’s QFD page updated 9 September 2026 listed, as a 2027-campaign example, Mechanical Reasoning registration from 20 August 2026 to 14 September 2026 and Core Abilities from 23 September 2026 to 13 October 2026. Invitation emails control the live window. Unused time on a gear diagram in August does not become extra reading time in October. Pace each battery against its visible timer.

Delivery is a laptop or computer with a webcam, an offsite proctor, and a location you choose that still satisfies Pearson’s rules. The 2024 pack bans pens, pencils, note paper, phones, and calculators on both components. There is no scratch pad for a long division, no phone calculator for a foam-ratio item, and no paper for tracing a gear train. Every mark has to come from what you can hold in working memory plus what is on the screen.

Complete Pearson’s QFD Sample Demonstration (look-and-feel, limited examples) and the OnVUE system check on the sitting machine before the day and again on the day. The demonstration is not a leak of live items, live counts, or a cut score. Independent OpenExamPrep quizzes are not a substitute for Pearson’s own interface rehearsal, and Pearson’s demonstration is not a substitute for practising Mechanical Reasoning and Core Abilities topics.

Classify, then choose a first-pass method

Spend a few seconds classifying before you start calculating or rereading. Classification is not a published QFD scoring category. It is how you stop applying a gear-train method to a reading item, and how you stop applying “best firefighter practice” to a must-be-true stem.

That table is a study heuristic, not a QFD published blueprint of how many items you will see in each family. Weights are unpublished. Use the rows to choose a method, not to predict the paper.

Worked switch, mechanical then literacy. A diagram shows two meshing gears and a belt to a third pulley. The stem asks which way the last pulley turns. First-pass: meshing reverses; a simple belt without a twist keeps direction. If a fourth unmarked idler appears and you cannot see contact, skip rather than invent a tooth count. The next item is a hydrant-procedure passage. Do not answer “shut the nearest valve” because that is what you would do on a drill ground. Answer only what the passage forces.

Worked switch, analytical then numeracy. A 3×3 matrix of shaded cells rotates 90 degrees clockwise each step. You pick the option that continues that single turn. The next item asks how many litres of foam concentrate a 20-litre batch needs at a 3:97 concentrate-to-water ratio. Restart: 3 parts concentrate in 100 parts mixture is 0.03 × 20 = 0.6 litres if the stem uses that mixture convention. Do not “feel” an answer from the matrix. Do not reach for a calculator that is not allowed.

Worked switch, literacy then mechanical. A syllogism says all breathing-apparatus wearers on this job are qualified, some qualified people are not on this job, and asks what must be true. Then a circuit diagram asks which bulb goes out when a switch opens. Clear the verbal sets from working memory before you trace the circuit. Mixing leftover “some/all” language into a series circuit is how people pick a bulb that is not even on the open branch.

Skip, review, and mode-switching hygiene

The pack states it is not expected that every candidate answers every question correctly. That sentence is a pacing instruction as much as a scoring instruction. A personal, unofficial heuristic is: if one clean method has not produced an answer and the timer has moved a noticeable slice of the sitting, skip. That heuristic is not a QFD seconds-per-item rule, because QFD has not published minutes-per-section or item counts. You still watch the visible timer and protect later items you could have answered.

If the software requires an answer before you can leave the item, make the best remaining choice and move. If it allows a later return, skip or flag and keep the rest of the battery alive. Do not sit on item 4 of Mechanical Reasoning while a later pulley item you could solve goes unseen. Do not sit on the first long Core Abilities passage while later ratio items expire.

Review is conditional. If time remains and the review function exists, go back in a deliberate order:

1. Mechanical diagrams that were one principle away (direction, which load, open branch) rather than diagrams that needed invented numbers.
2. Numeracy you can recompute mentally now that the stem is familiar.
3. Long passages that need a second targeted read of one constraint.
4. Analytical items only if you can now name a single transforming feature you missed.

Do not assume every item reopens after the clock hits zero. Do not spend the last minutes reopening items you already answered confidently while skipped items sit untouched. Do not treat Pearson’s Sample Demonstration review button as proof that the live scored sitting will offer the same control; use whatever the live software actually shows.

Mode-switching without paper

Without stationery, the main failure mode is carrying the previous family’s method into the next stem.

• After a rotation item, read the next stem twice before you act. Rotations prime you to “turn” everything, including numbers that should stay still.
• After a long passage, glance at the next diagram’s asked quantity before you interpret arrows. Passages prime you to add operational story the diagram does not show.
• After a ratio item, do not treat a shape-sequence shading count as another ratio unless the stem actually asks for a proportion.
• Keep a silent label: “direction,” “must-be-true,” “units,” or “one feature.” If you cannot name the label, you have not classified yet.

Mechanical first-pass reminders (not a full reteach): meshing gears reverse; a simple open belt without a twist keeps direction; a lever question is usually about effort, load, and fulcrum distance, not about decorating the diagram with extra forces; a series circuit goes dark downstream of an open switch; kinetic-energy comparisons follow mass and speed in the stem, not how dramatic the cartoon looks. If you need a second chapter of gear theory to finish the item, you are already past a sensible first pass.

Core Abilities first-pass reminders: literacy options that add a friendly extra fact are usually wrong; numeracy starts with units; a sequence needs a rule that fits every shown term; a matrix is one transformation across a row or column, not a story about fireground teamwork.

Sitting-day list for the cognitive batteries

1. Confirm you are inside the invitation window for this component; Mechanical Reasoning and Core Abilities can be different days.
2. Run the OnVUE system check on the sitting computer and network.
3. Place valid unexpired ID where the proctor can see it; keep Pearson’s confirmation details off your phone during the sitting.
4. Clear the desk: no pens, pencils, note paper, phones, or calculators.
5. When the timer starts, classify each item, take one clean first pass, and skip when stuck.
6. If review is available and time remains, return to skipped items in the order above.
7. Stop treating unpublished 70 percent figures, unpublished 60–80 item counts, or four equal 25 percent domains as QFD facts.
8. After submit, the campaign is not finished: Operational Focused Abilities Test (OFAT), interview, and psychological assessment still sit downstream if you progress.

Independent OpenExamPrep practice on Mechanical Reasoning and Core Abilities topics is practice you choose. It is not a QFD or Pearson VUE publication, and it does not claim official approval, partnership, or exact equivalence with the live batteries.