This CER Exam Practice Questions and Answers 2026/2027 resource contains 150+ practice questions, answers and illustrated review material across 47 pages, with comprehensive coverage of endoscope reprocessing, flexible and rigid endoscopes, high-level disinfection (HLD), sterilization, microbiology, infection prevention, leak testing, manual cleaning, Automated Endoscope Reprocessors (AERs), storage, equipment maintenance and regulatory standards. The document uses multiple-choice and true/false questions to reinforce both theoretical knowledge and practical reprocessing procedures. It is presented as a CER exam-preparation resource with answers and illustrations, but it does not identify a specific university or academic institution.
The opening section focuses on endoscopy fundamentals and the clinical purposes of endoscopes. The material distinguishes routine screening, diagnostic procedures and therapeutic treatment and emphasizes the importance of providing a functional endoscope to support accurate diagnosis. Students review the meaning of endoscopy and identify specialized scopes according to their anatomical applications, including the rhinolaryngoscope, colonoscope, bronchoscope, gastroscope, enteroscope, cystoscope, duodenoscope, choledochoscope, flexible intubation scope, ureteroscope and hysteroscope.
A major portion examines flexible endoscope construction and function. Students review the insertion tube, biopsy port, universal cord, instrument channel, control body and other components involved in endoscopic procedures. The resource identifies flexible endoscopes as particularly complex devices and explains how their configuration contributes to reprocessing challenges. It also reviews clinical applications such as examining the gastrointestinal and respiratory tracts, obtaining tissue samples, removing polyps and investigating diseases such as inflammatory bowel disease.
The microbiology section covers bacteria, viruses, spores, biofilms and opportunistic infections. Questions distinguish Gram-positive and Gram-negative organisms, discuss bacterial endospores and their resistance, compare enveloped and non-enveloped viruses and examine the role of symbiotic bacteria. Particular attention is given to biofilm formation on endoscopes, contamination risks and the relationship between contaminated devices and healthcare-associated infection. The source also associates sepsis with several types of endoscopic procedures.
Another high-value section addresses endoscope reprocessing-area design and environmental controls. The material emphasizes one-way workflow, physical separation between soiled and clean areas, appropriate airflow and humidity, controlled temperature and adequate workspace. It discusses how poorly designed or crowded workspaces can contribute to equipment damage and cross-contamination and reinforces the importance of barriers that prevent aerosols generated in contaminated areas from entering clean processing spaces.
The resource provides extensive coverage of decontamination, personal protective equipment and cleaning chemistry. Students review appropriate reprocessing attire, face and eye protection, PPE removal, enzymatic detergents, low-foaming cleaning agents, neutral-pH products and manufacturer Instructions for Use (IFUs). The document repeatedly emphasizes following the manufacturer's IFU, paying attention to detail and using correct work practices when selecting chemicals, preparing solutions and cleaning endoscopes.
A detailed sequence of questions covers point-of-use precleaning and leak testing. Precleaning is linked to reducing biofilm formation and begins with removal of gross soil after the endoscope is withdrawn from the patient. Leak testing is presented as necessary after procedures and before manual cleaning, with the primary objective of detecting internal or external damage. Students also review water-resistant caps, major leaks, transportation to the reprocessing area and delayed processing, which the document defines as reprocessing beginning more than one hour after use.
The manual-cleaning section addresses fresh cleaning solution, channel brushing, flushing, rinsing and drying. The document states that cleaning solution should be changed for each endoscope and stresses the use of lint-free cloths or sponges on external surfaces. It also discusses brush sizing, cleaning removable components, purging channels with air and following manufacturer instructions for related equipment such as water bottles. Students additionally review the use of borescopes to visually inspect internal endoscope channels and testing methods for assessing cleaning efficacy.
The resource then moves into inspection, high-level disinfection and AER operation. Questions cover visual inspection after cleaning, broken light fibers, venting during sterilization, minimum effective concentration testing, rinsing according to the manufacturer's IFU, drying after HLD and correct storage preparation. The AER section emphasizes that automated processing does not eliminate the need for thorough manual cleaning and covers quality testing, device-specific connectors, HLD documentation and testing the disinfectant's minimum effective concentration before use.
A substantial portion covers low-temperature sterilization and ethylene oxide (EtO/ETO). Students review appropriate preparation, compatibility, drying, packaging, ventilation adapters, peel pouches, load considerations and biological indicators. The document also addresses OSHA-related emergency-alert requirements for ethylene oxide sterilization and reinforces that endoscopes and their accessories must be processed according to device-specific requirements.
The storage and handling section examines cross-contamination prevention, drying, valves, filtered-air storage and hang time. The resource warns that replacing valves during storage can trap moisture and facilitate microbial growth. It discusses storage practices for high-level-disinfected and sterilized endoscopes and presents hang time as a facility-determined issue. Risk assessment is also introduced as the process of identifying hazards and assigning potential impacts to those risks.
Students also receive detailed preparation on rigid endoscopes and video-imaging systems. Topics include arthroscopes, objective and ocular lenses, glass rod lenses, working channels, illumination fibers, light cords, cameras and causes of rigid-endoscope damage. Equipment-management questions address safety, inspection, planned maintenance and protocols for handling damaged devices.
The later sections focus on damaged endoscopes, repair and loaner-device management. The material discusses leak-testing findings, pressurization of damaged devices, protecting equipment during shipment, documenting reprocessing methods before repair and supplying repair companies with descriptions of identified problems. Loaned endoscopes should also be inspected for damage before entering the healthcare facility's normal use and reprocessing system.
The document additionally covers the roles of major regulatory and professional organizations, including the FDA, CDC, EPA, OSHA and AAMI. Questions address FDA-approved reprocessing equipment, device recalls and manufacturer IFUs; CDC guidance; EPA registration of disinfectants; and AAMI's role in developing standards and technical information reports. The source further emphasizes following the more stringent requirement when applicable regulations differ.
A specialized section covers TEE and endocavity ultrasound probes. Students review transesophageal echocardiography probes, fluid-invasion risks, inspection for damage, HLD according to manufacturer instructions, lighted magnification, transportation of contaminated probes and storage in vented cabinets. This expands the study material beyond traditional flexible endoscopes into other complex reusable devices requiring carefully controlled reprocessing.
The final questions emphasize human factors, auditing, staff competency and quality improvement. Stress, boredom and personal problems are identified as potential influences on employee performance, while turnaround pressure is associated with an increased risk of shortcuts. The document explains that auditing helps determine whether reprocessing activities align with manufacturer IFUs and facility policies and states that staff education should occur at hiring, when new endoscopes enter the system and when breaks in protocol occur.
For academic and professional reference, the material directly names AAMI, CDC, FDA, EPA and OSHA and repeatedly emphasizes manufacturer IFUs. A relevant scholarly reference for the underlying infection-prevention principles is McDonnell and Hansen's Block's Disinfection, Sterilization, and Preservation, which addresses microorganisms, disinfection, sterilization and medical-device processing.
APA reference: McDonnell, G., & Hansen, J. (Eds.). (2020). Block's disinfection, sterilization, and preservation (6th ed.). Wolters Kluwer.
Relevant Students
This document is particularly relevant to CER exam candidates, endoscope reprocessing technicians, sterile processing students, central service technicians, endoscopy technicians, surgical technology students, infection prevention students and healthcare personnel responsible for reusable endoscopic equipment. It can also benefit students preparing for certification or competency assessments involving flexible endoscopes, rigid endoscopes, HLD, AER operation, low-temperature sterilization and infection prevention.
It is especially useful for learners reviewing endoscope anatomy, endoscope types, microbiology, biofilm, reprocessing workflow, PPE, point-of-use precleaning, leak testing, manual cleaning, borescope inspection, high-level disinfection, minimum effective concentration, AERs, ethylene oxide sterilization, storage, hang time, TEE probes, FDA requirements, CDC guidance and AAMI standards.
Keywords
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