50 Free CRCST Practice Questions 2026 (with Answers & Explanations)

Correct Answer: B — Handle carefully to avoid bending beyond minimum radius, inspect fibers for breakage (dark spots), clean per IFU, and coil loosely

Explanation: Fiber optic cables are delicate and expensive. They must not be sharply bent (breaks fibers), should be inspected by holding one end to light (dark spots = broken fibers), cleaned per manufacturer IFU, and stored loosely coiled to prevent damage.

Correct Answer: B — FDA (device regulation), OSHA (worker safety), EPA (waste disposal), state health departments (licensing), CMS (Medicare conditions), and The Joint Commission (accreditation)

Explanation: Multiple agencies regulate SPD: FDA regulates medical devices, OSHA enforces worker safety, EPA governs hazardous waste, state health departments issue licenses, CMS sets Medicare conditions, and TJC provides accreditation standards.

Correct Answer: B — Originating in a hospital or healthcare facility (healthcare-associated)

Explanation: Nosocomial means originating in a hospital. Nosocomial infections (now called healthcare-associated infections or HAIs) are acquired during healthcare. SPD plays a critical role in preventing nosocomial infections through proper instrument reprocessing.

Correct Answer: B — Urological surgeries use specialized instruments (cystoscopes, resectoscopes, ureteral stents) that contact sterile tissue and require sterilization

Explanation: Urological instruments include cystoscopes (semi-critical), resectoscopes, ureteral stents, and lithotripsy devices. Many are complex with lumens and channels requiring thorough cleaning. Urinary catheters are critical devices requiring sterilization.

Correct Answer: B — Ultrasonic cleaner

Explanation: Ultrasonic cleaners use high-frequency sound waves (cavitation) to create tiny bubbles that implode and dislodge soil from instrument surfaces, especially hard-to-reach areas like lumens, joints, and serrations.

Correct Answer: B — Only when there is an urgent patient need and no other sterile instrument is available

Explanation: IUSS is appropriate ONLY when there is a genuine urgent patient need and no other sterile alternative is available. It should not be used for convenience, to compensate for inadequate inventory, or for implantable devices.

Correct Answer: B — Steam must be at least 97% saturated (no more than 3% moisture) and free of non-condensable gases — poor steam quality causes wet packs, incomplete sterilization, and instrument damage

Explanation: AAMI ST79 requires steam quality of ≥97% dryness fraction. Excessive moisture causes wet packs. Non-condensable gases (air, CO2) create pockets where sterilization conditions aren't met. Steam quality testing should be performed regularly per AAMI ST8.

Correct Answer: B — Inspect lens clarity, clean per IFU using appropriate brushes, rinse thoroughly, dry, protect tips, and sterilize using a validated method compatible with the scope

Explanation: Rigid endoscopes are precision optical instruments. They must be inspected for lens clarity and damage, cleaned per IFU with appropriate brushes and detergent, thoroughly rinsed, dried, tip-protected, and sterilized via a validated compatible method.

Correct Answer: B — Documentation provides traceability, supports quality assurance, meets regulatory requirements, and protects against liability

Explanation: Documentation is essential for traceability (tracking instruments from processing to patient use), demonstrating regulatory compliance, supporting quality improvement initiatives, investigating adverse events, and legal protection.

Correct Answer: B — A disease or condition that is consistently present in a particular population or geographic area at a baseline level

Explanation: Endemic means a disease is constantly present in a population at expected levels. Example: MRSA is endemic in many hospitals. Understanding endemic vs epidemic helps SPD understand infection control urgency levels.

Correct Answer: B — The system of bones, muscles, joints, tendons, and ligaments — orthopedic surgery on this system uses the largest variety of complex instruments and implants requiring sterilization

Explanation: The musculoskeletal system includes bones, muscles, joints, tendons, and ligaments. Orthopedic surgery is one of SPD's most demanding areas, involving extensive instrument sets (power tools, implants, complex devices) requiring precise assembly and sterilization.

Correct Answer: B — Receiving soiled items, sorting, pre-cleaning, operating manual and automated cleaning equipment, inspecting for cleanliness and damage, and preparing items for assembly — all while following safety protocols

Explanation: Decontamination technicians perform all initial processing: receiving soiled items, sorting (separating sharps, trash, linen), pre-cleaning, manual/mechanical cleaning, quality inspection, and preparing clean items for the assembly area. Requires comprehensive PPE and safety knowledge.