CRCST Practice Exam

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Prepare for the CRCST exam with our interactive quiz featuring multiple choice questions and detailed explanations. Improve your knowledge and confidence before test day!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which of the following is a high-level disinfectant approved for disinfecting flexible endoscopes?

Alcohol
Chlorine
Ortho-phthalaldehyde
Hydrogen Peroxide

The correct answer is: Ortho-phthalaldehyde

Ortho-phthalaldehyde is the correct answer because it is a high-level disinfectant that is approved for disinfecting flexible endoscopes. It has broad-spectrum microbicidal activity and is effective against a wide range of microorganisms, making it suitable for the high-level disinfection required for endoscopes. Alcohol is not a high-level disinfectant and is generally used for low-level disinfection on the skin. Chlorine is more commonly used as a low-level disinfectant or for environmental cleaning rather than for high-level disinfection of endoscopes. Hydrogen peroxide is typically used as a sterilant rather than a high-level disinfectant.