Sterile Processing Technician Interview Questions
& Model Answers, 2026

Soiled instruments enter decontamination, are cleaned and disinfected, pass through to the clean assembly area, are inspected, assembled and packaged, then sterilised and moved to sterile storage. It runs one way — with air pressure, physical separation and PPE changes enforcing it — because any backflow risks recontaminating processed instruments. A candidate who describes the pressure differentials and the PPE change points is describing the real control.

Point-of-use treatment is keeping soil moist at the end of the procedure — wiping, removing gross soil, applying a pre-treatment spray or gel — so blood and tissue do not dry into hinges and lumens. Dried bioburden is the single biggest cause of instruments that cannot be cleaned properly, and cleaning failure makes sterilisation meaningless. Good answers mention educating OR staff about it rather than just complaining.

A typical prevacuum cycle runs at around 132 to 135 degrees Celsius for the manufacturer's stated exposure time with a dry time, and every load is verified in layers: physical printout parameters, external and internal chemical indicators, a daily Bowie-Dick air-removal test, and biological indicators per policy and in every implant load. The answer must say implants are held for the biological indicator result whenever possible.

Take the sterilizer out of service, quarantine and recall every load back to the last negative biological indicator, notify the supervisor, infection prevention and the OR, retest after the sterilizer is checked, and document the investigation. Every item processed since the last negative is treated as non-sterile. Answering that you would simply rerun the load misunderstands what a positive result means.

A wet pack is not sterile — moisture provides a path for microorganisms — so it does not go to storage. Reprocess the pack, and investigate the cause: overloading, incorrect loading orientation, wrapping too tight, a cooling problem, or steam quality. Repeating wet packs are a sterilizer or steam-supply issue, and reporting the pattern rather than reprocessing quietly is the mark of a good technician.

Work from the current count sheet, inspect every instrument for cleanliness, function and damage under lighted magnification, test sharpness and box locks, place ratcheted instruments open and unlocked, protect delicate tips, distribute weight within the tray's limit, and add the internal indicator before wrapping. The count sheet is the standard that lets any technician build a tray the surgeon can trust — never build from memory.

The manufacturer's instructions for use decide, not habit: heat- and moisture-sensitive items such as flexible endoscopes and certain powered or electronic devices go to low-temperature hydrogen peroxide or ethylene oxide depending on the device and lumen restrictions. Naming the IFU as the authority is the whole answer — technicians who improvise the method are the ones who destroy expensive instruments.

The answer must end with the tray not being released. Describe how you communicated — what was missing, the actual time to completion, offering an alternative tray or a different set — and that you involved your supervisor rather than either caving or stonewalling. Departments hire on this answer because immediate-use steam sterilisation abuse starts exactly here.

Show the catch and the follow-through: what you saw under magnification, that you sent it back to decontamination or pulled it for repair rather than passing it on, and that you documented and reported the pattern if it recurred. Instruments with retained bioburden reaching a patient is the failure this whole department exists to prevent.

Concrete triage: work from the OR schedule, prioritise the next cases and the sets with the longest cycle time, communicate with the OR desk about what will be ready when, and pull in help early. The essential part is that you shorten waiting, never the process. Interviewers listen for whether the pressure changes your standard.

Teach PPE and the workflow direction before anything else, then one instrument category at a time, verifying rather than assuming competence, and being explicit about the reasoning — why the ultrasonic matters, why lumens are brushed and flushed. Naming the check you use to confirm the trainee actually cleaned an item is what makes the answer credible.

Ground it in the published data: the BLS OEWS May 2025 median for this occupation is $47,700 a year ($22.93/hr) with the top 10% above $69,950, and certified technicians in hospital surgical departments sit well into the upper half. Quote a range, and justify the top of it with certification, endoscope reprocessing, robotic instrument experience or lead responsibilities.

Directly. CRCST or CSPDT is the baseline in many hospitals, and advanced credentials in endoscope reprocessing, surgical instrument specialisation or management move you toward the top of the band. Name what you hold, name what you are studying for, and ask whether the department pays for the exam and the annual continuing education requirement.

Ask what the evening and night differential is first, because sterile processing runs around the clock and the differential is often substantial. Then decide deliberately rather than by default: evenings usually carry the heaviest turnover load, so if you take the differential, make sure the staffing on that shift is realistic. Both questions are fair to ask in the interview.