TheoryMDRAO Medical Device Exam Prep
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Practice MDRAO Medical Device Exam Prep with exam-style questions, clear answer explanations, free samples and timed mock exam links.
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MDRAO Medical Device Exam Prep sample questions
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Safety Which of the following best describes the primary purpose of cleaning in the medical device reprocessing cycle?
A. To remove organic and inorganic soil so that subsequent disinfection or sterilization can be effective ✓
B. To eliminate all viable microorganisms from instrument surfaces
C. To reduce bioburden to a safe level without further processing
D. To extend the functional lifespan of instruments
Correct — A. Cleaning removes soil, blood, and organic matter that would otherwise shield microorganisms from sterilants or disinfectants. It is a prerequisite step; disinfection and sterilization cannot be reliably achieved on uncleaned surfaces.
Regs According to Spaulding's classification, a flexible endoscope that contacts only intact mucous membranes is categorized as:
A. Semi-critical ✓
B. Critical
C. Non-critical
D. Immediate-use only
Correct — A. Semi-critical devices contact mucous membranes or non-intact skin and require at minimum high-level disinfection. Critical devices penetrate sterile tissue; non-critical devices contact only intact skin.
Ops Which biological indicator organism is used to validate steam sterilization cycles?
A. Geobacillus stearothermophilus ✓
B. Bacillus atropheus
C. Clostridium difficile
D. Staphylococcus aureus
Correct — A. Geobacillus stearothermophilus spores are highly resistant to moist heat and are the reference organism for validating steam sterilization. Bacillus atropheus is used for ethylene oxide (ETO) sterilization.
Emergency The Bowie-Dick type test is performed on a pre-vacuum steam sterilizer to verify:
A. Air removal efficiency and steam penetration ✓
B. Correct sterilization temperature is reached
C. Biological indicators have been destroyed
D. Packaging material integrity
Correct — A. The Bowie-Dick test detects air leaks and inadequate air removal in pre-vacuum sterilizers. It does not confirm microbial kill; that is the role of biological indicators.
Safety A surgical instrument that enters the bloodstream or a normally sterile body cavity must receive which level of processing?
A. Low-level disinfection
B. Intermediate-level disinfection
C. High-level disinfection
D. Sterilization ✓
Correct — D. Under Spaulding's classification, critical devices that enter sterile body cavities or the bloodstream carry the highest infection risk and must be sterilized before use.
Regs Which biological indicator organism is the standard for validating ethylene oxide (ETO) sterilization?
A. Bacillus atropheus ✓
B. Geobacillus stearothermophilus
C. Mycobacterium tuberculosis
D. Aspergillus niger
Correct — A. Bacillus atropheus (formerly B. subtilis var. niger) spores are highly resistant to ETO and serve as the standard biological indicator for ETO sterilization validation.
Ops How often must the Bowie-Dick type test be performed in a facility using a pre-vacuum steam sterilizer?
A. Once per day before the first processed load ✓
B. Once per week
C. Once per month
D. After every sterilization cycle
Correct — A. The Bowie-Dick test is performed daily before the first load is processed to confirm that air removal function is intact at the start of each operating day.
Safety In a pre-vacuum steam sterilizer, the purpose of the vacuum phase before steam admission is to:
A. Remove air pockets that would impede steam penetration ✓
B. Cool the chamber to prevent damage to heat-sensitive items
C. Increase chamber pressure prior to the sterilization cycle
D. Dry the load before the exposure phase begins
Correct — A. Air is a poor conductor of heat and, if trapped, creates cold spots preventing effective steam penetration. The pre-vacuum phase removes air before steam injection, ensuring uniform steam contact with all surfaces.
About the MDRAO Medical Device Exam Prep test
Built around Nursing/Medical, this MDRAO Medical Device Exam Prep question bank mirrors the real exam format instead of guessing at trick questions. Work through the free sample, read every explanation, then move on to full timed mock exams once you're ready.
You will be tested on
- Safe and effective care environment
- Health promotion and maintenance
- Psychosocial and physiological integrity
- Pharmacology, infection control and patient safety
How TheoryPractice helps you pass
- Real exam-style questions with instant, detailed explanations
- Full timed mock exams that mirror the real test format
- Flashcards & quiz modes from the same question bank
- Progress tracking so you know exactly when you're ready
Topics in this question bank
Safe and effective care environment
Health promotion and maintenance
Psychosocial and physiological integrity
Pharmacology, infection control and patient safety
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