The MRCEM SBA presents 180 single best answer questions across two papers, each lasting two hours, with an hour's break between them. Most candidates prepare by working through a question bank in whatever blocks fit around their shifts, and then meet the actual structure for the first time on the day. The structure is not incidental. Ninety questions in 120 minutes gives you eighty seconds each, and then, after a break long enough to lose your rhythm entirely, you have to do it again. Preparing for the content without preparing for the shape of the day leaves marks on the table.
Key takeaways
- The exam is 180 SBAs across two two-hour papers, with a one-hour break in the middle.
- That is roughly eighty seconds per question, which is brisk but manageable if you have practised it.
- There is no negative marking, so every unanswered question is a mark given away for nothing.
- The hour-long break is unusually long and needs a plan, because it can cost you the second paper.
- Track accuracy by paper and by position within a paper, so you can tell fatigue apart from ignorance.
The shape of the day
Start by being concrete about what you are actually sitting, because it is not what most candidates rehearse.
Paper one: ninety questions, two hours. Paper two: ninety questions, two hours. Between them, a full hour. The pass mark is set by the Angoff method rather than being a fixed percentage, the exam is machine-marked, and there is no negative marking, so a wrong answer costs you nothing that a blank does not.
Eighty seconds per question is a comfortable pace for a question you know and an uncomfortable one for a question you do not. That asymmetry is the whole game, and it means your practice needs to build a reliable habit of committing and moving on rather than a habit of lingering.
Build to the full length, and do it more than once
Emergency medicine trainees are, understandably, terrible at sitting still for four hours. The job trains you for the opposite: rapid task-switching, constant interruption, short bursts of intense focus. The exam asks for something you have specifically been trained out of.
So progress your practice deliberately. Short blocks early, when the priority is coverage and correction. Then timed fifty-question blocks. Then full ninety-question papers under exam conditions. And at least twice, sit both papers on the same day, with a genuine hour between them, because that is the specific thing you will be asked to do and it is not the same as sitting two papers on different evenings.
The full rehearsal is unpleasant and it takes half a day. It is also the single most informative thing you will do in your preparation.
The hour that decides the second paper
An hour is a long break, and it is long enough to actively harm you if you do not plan it.
The common failures are predictable. Candidates spend it relitigating paper one, mentally re-answering questions they cannot now change, and arrive at paper two anxious and depleted. Or they eat something heavy, and hit the mid-paper slump. Or they simply sit there, cooling down completely, and take twenty questions to get back into rhythm, which at eighty seconds a question is a substantial chunk of paper two.
Have a plan and practise it on your mocks. Eat something light. Drink water. Move, ideally away from the test area. Do not attempt to look anything up, because it is too late for paper one and it will only unsettle you for paper two. And explicitly refuse to review the first paper: it is scored, it is done, and the only marks you can still influence are the ninety in front of you.
Answer everything
This deserves stating plainly because it costs candidates real marks every diet. There is no negative marking. A guess is strictly better than a blank.
If you are running short of time, the correct strategy is to ensure every question has an answer before you go back to refine the ones you flagged. A wild guess on a five-option question is worth a fifth of a mark in expectation. A blank is worth exactly zero. Over a handful of questions, that is the margin many candidates fail by.
Separate fatigue errors from knowledge errors
Here is the diagnostic that most candidates never run, and it changes what they should do next.
After a full mock, break your accuracy down four ways: the first half of paper one, the second half of paper one, the first half of paper two, and the second half of paper two.
If accuracy is flat across all four, your stamina is fine and your errors are knowledge errors. Revise content, and stop worrying about endurance.
If accuracy is solid in paper one and falls in paper two, or falls in the back half of each paper, that is a concentration and endurance signature. More content revision will not touch it. What will is longer practice blocks, a better break strategy, attention to sleep in the run-up, and deliberately rehearsing the full-day format until it stops being novel.
Most candidates assume every error is a knowledge error, revise more content, and are surprised when the pattern repeats.
Prepare for the breadth, not your rotation
One content point worth making within a piece about structure. The exam maps to the emergency medicine curriculum across the full range of presentations, which means it is not weighted towards whatever you have been seeing in your department this month. Trainees who are strong in resuscitation but thin on ophthalmology, dermatology, paediatric minor injury or the psychiatric presentations of the ED will find that the paper does not share their priorities.
Coverage first, then targeting. Sample the whole curriculum before you let an adaptive engine narrow your focus, because an engine cannot target a weakness in a domain you have never attempted.
Where iatroX fits
iatroX's MRCEM SBA bank supports the whole progression: broad coverage across the curriculum first, then an adaptive engine that targets the domains where you are genuinely weak, spaced repetition to hold a wide curriculum together across a long preparation, and timed practice at the real ninety-question format so your pacing is calibrated to eighty seconds a question rather than to leisurely evening revision. Missed questions can be opened in the Socratic Tutor, which asks you to reason before it explains. Try it with free sample questions at iatroX. For the reasoning that separates two plausible emergency treatments, see choosing between two reasonable answers.
Frequently asked questions
What is the format of the MRCEM SBA? One hundred and eighty single best answer questions across two papers, each lasting two hours, with a one-hour break in the middle. It is machine-marked with no negative marking, and the pass mark is set by the Angoff method.
How much time do I have per question? About eighty seconds. That is brisk but workable, provided you have practised committing and moving on rather than lingering on questions you are unsure of.
Should I guess if I do not know the answer? Always. There is no negative marking, so a guess is strictly better than a blank. If time is short, make sure every question has an answer before you go back to refine flagged ones.
How should I use the one-hour break? Deliberately, and rehearse it on your mocks. Eat something light, drink water, move away from the test area, and refuse to review paper one. Ruminating on a scored paper only depletes you for the ninety questions you can still influence.