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CRCST (Certified Registered Central Service Technician) Exam

For those who operate in the fields of central service technology and sterile processing, there is a certification exam called the Certified Registered Central Service Technician (CRCST). These experts are in charge of sanitizing, preparing, and cleaning surgical instruments and equipment used in medical facilities such as clinics, hospitals, and surgical centers. The International Association of Healthcare Central Service Materiel Management (IAHCSMM) is responsible for overseeing the CRCST certification, which is extensively accepted in the US and a few other nations.CRCST (Certified Registered Central Service Technician) Exam

Here are things you should know about CRCST (Certified Registered Central Service Technician) Exam:



The purpose of the CRCST certification is to verify that central service technicians possess the necessary knowledge and abilities to perform important tasks  related to infection control, sterilization, and processing surgical instruments. In order to protect patient safety and lower the risk of infections linked to healthcare, this designation is important.


Candidates must normally satisfy particular educational and occupational requirements in order to be eligible to take the CRCST exam. While specific requirements may differ, candidates frequently need to have either completed an approved training program for central service technicians or have suitable job experience in the industry.

Exam Content

The CRCST exam covers a broad range of topics relevant to central service technology and sterile processing, including as regulatory standards, cleaning and decontamination techniques, sterilization procedures, and infection control. Multiple-choice questions make up the exam, and the quantity of questions varies from exam cycle to exam cycle.

Study Materials and Resources

To assist students in getting ready for the CRCST exam, IAHCSMM offers study materials and resources. Textbooks, online courses, and practice tests are a few examples of these tools. It is suggested that candidates go over these resources in-depth to make sure they are ready for the test.

Exam Administration

At approved testing centers, the CRCST exam is normally given via a computer-based testing system. To take the test, candidates need to pay a fee and book their exams in advance.


Candidates must pass the CRCST test in order to become a Certified Registered Central Service Technician. The IAHCSMM normally determines the passing score. After a waiting period, a candidate who does not pass the exam could be able to retake it.

Certification Renewal

Central service technicians must fulfill continuing education requirements and pay renewal fees in order to maintain their CRCST certification, which has a set end date. Maintaining up-to-date with the latest standards and industry best practices requires doing this.

A central service technician’s dedication to quality and safety in the healthcare sector is demonstrated by the highly regarded CRCST accreditation. For those in this field, it may result in greater earning potential and possibilities for employment. It’s crucial to learn about the particular prerequisites and CRCST exam preparation materials offered by IAHCSMM if you’re interested in a career in central service technology.

CRCST Strategies for Preparation

It takes a lot of hands-on training, research on your own, and/or IAHCSMM CRCST practice exams to pass the CRCST exam. To obtain your CRCST certification, you need to pass the examination and then complete 400 hours of hands-on work or 400 hours of service within six months after the exam. However, you won’t receive your IAHCSMM CRCST certification if you have the experience but fail the CRCST exam. It is important that you push yourself to pass the test as a result.CRCST (Certified Registered Central Service Technician) Exam

The most important prior strategy, given the necessary work experience, is to focus on your task and avoid taking short cuts. To strengthen your knowledge and increase your chances of passing the test, there are other things you may do.

Listed Below are the Most important Strategies for Preparation  

Take Online Courses:

You may get ready for the CRCST exam by participating in one of the many online courses available, such as the one provided by iPrep. IAHCSMM CRCST practice exams are included in these courses to help you get ready for the exam setting.

Official Courses:

Purdue University provides an extensive program that will help you get ready for the exam. You can prepare for the test by taking the Purdue course, which additionally offers help with finding an externship. The course at Purdue University costs $420 total, including fees, while the externship costs $300. Although passing the Purdue course will get you ready for the test, it won’t grant you the certification.


Study guides have been created by the IAHCSMM’s education department. Your study will be guided by the CS Technical Manual, 8th edition, ANSI/AAMI’s ST79, and AORN’s Guidelines for Perioperative Practice, which can be acquired on its website. The CS Technical Manual, 9th edition, published by the HSPA, will be made available gradually beginning in February 2023.

CRCST Exam Date

During the one-week testing window, each of our four certification tests is available on the exam dates shown below. Exam registration is open to candidates at any time during the window; however, test site seating is subject to availability. During the present one-week exam window, any applicant in the United States may register for more than one exam. During any exam window, the candidate may not register for the same exam more than once. Please be aware that certain test locations outside of the US will continue to administer exams using paper and pencil, and that they will still be available four times a year.

Examination DatesApplication Deadlines
February 6-11, 2023Tuesday, January 31, 2023
May 1-6, 2023Tuesday, April 25, 2023
August 7-12, 2023Tuesday, August 1, 2023
November 6-11 2023Tuesday, October 31, 2023

CRCST Exam Practices

Listed Below are the Most common Questions and It answers on CRCST Exams

Question. 1

Cleaning, Decontamination, and Disinfection

During the cleaning process of surgical instruments, a Central Service Technician notices some visible biofilm on a surgical scissor. What should the technician do next?

  • A. Wipe the instrument with a dry cloth to remove the biofilm
    B. Proceed to the disinfection process as planned
    C. Immerse the instrument in an enzymatic cleaner to break down the biofilm
    D. Use a sterilization wrap to cover the instrument before processing

Correct Answer: C. Immerse the instrument in an enzymatic cleaner to break down the biofilm


Biofilm is resistant to regular cleaning, disinfection, and even sterilization processes. Thus, when biofilm is present, the instrument should be immersed in an enzymatic cleaner (C) to break down the biofilm. Wiping with a dry cloth (A) is not effective in removing biofilm. Proceeding to the disinfection process (B) or covering with a sterilization wrap (D) while biofilm is still present can lead to ineffective sterilization and potential cross-contamination.

Question 2. 

Preparation & Packaging

While packaging a set of surgical instruments, a technician notices that a hinge instrument is not opening and closing smoothly. What is the best course of action?

  • A. Lubricate the hinge and continue with packaging
  • B. Replace the instrument immediately
  • C. Send the instrument for repair and continue packaging without it
  • D. Ignore the issue as it is not of major concern

Correct Answer: C. Send the instrument for repair and continue packaging without it


When a hinge instrument is not functioning correctly, the best course of action is to send the instrument for repair and continue packaging without it (C). Lubricating the hinge and continuing with packaging (A) would not address the underlying problem with the instrument. Replacing the instrument immediately (B) might not be an option if an exact replacement is not readily available. Ignoring the issue (D) could risk patient safety and procedural efficacy.

Question 3. 

Documentation and Record Maintenance

A Central Service Technician discovers an inconsistency in sterilization records. What should the technician do first?

  • A. Discard the records to avoid confusion
    B. Report the discrepancy to the supervisor immediately
    C. Correct the discrepancy on their own
    D. Ignore the discrepancy as it might be a minor error

Correct Answer: B. Report the discrepancy to the supervisor immediately


If a Central Service Technician discovers a discrepancy in sterilization records, they should report the discrepancy to the supervisor immediately (B). This is because any errors in sterilization records can have significant consequences for patient safety. Discarding the records (A) could eliminate important information. Correcting the discrepancy on their own (C) may not be appropriate without first discussing the issue with a supervisor. Ignoring the discrepancy (D) could also lead to adverse consequences if the issue is not resolved.

Question 4.

Sterilization Process

You’re a Central Service Technician and while processing surgical instruments, you find that the biological indicator (BI) for the steam sterilization process has turned positive. What should be your immediate course of action?

  • A. Run the sterilization cycle again immediately with the same instruments
    B. Discard the biological indicator as it might be faulty
    C. Report the incident, quarantine the load, and reprocess all items
    D. Use a chemical indicator to confirm the result

Correct Answer: C. Report the incident, quarantine the load, and reprocess all items


A positive BI indicates that the sterilization process was unsuccessful. In this situation, the technician should report the incident, quarantine the load, and reprocess all items (C) to ensure patient safety. Simply running the sterilization cycle again (A) or using a chemical indicator to confirm the result (D) would not adequately address the potential for non-sterile instruments. Discarding the BI (B) ignores a serious process failure.

Question 5.

Customer Relations

In a situation where a department staff member has delivered contaminated instruments without adhering to proper protocol, what is the first step a Central Service Technician should take?

  • Return the instruments to the department
    Directly inform the supervisor about the incident
    Sterilize the instruments before any further steps
    Communicate with the staff member about the protocol breach and its potential implications

Correct Answer: D. Communicate with the staff member about the protocol breach and its potential implications


While it may seem logical to take immediate action such as returning the instruments or sterilizing them, the first action should be to communicate directly with the staff member involved (D). This ensures that the person is made aware of the breach, understands the potential implications, and can take corrective action.

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Types of CRCST Questions Explained

There are seven sections of the multiple-choice CRCST exam. It has three hours to be finished.

TopicPercentage WeightTopics coveredApproximate number of questions
Cleaning, Decontamination & Disinfection20%1130
Preparation & Packaging20%1030
Sterilization Process20%1430
Patient Care Equipment10%815
Sterile Storage & Inventory Management10%915
Documentation and Record Maintenance10%315
Customer Relations10%215


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Related Article


People working in the areas of central service technology and sterile processing must pass the CRCST (Certified Registered Central Service Technician) exam in order to become certified. It helps with job development, denotes a commitment to maintaining the highest standards of quality and safety in healthcare settings, and necessitates continuing education to stay up to date in the industry. Passing the CRCST exam is a significant achievement that demonstrates expertise in maintaining and preparing surgical instruments and equipment, ultimately contributing to patient safety and the healthcare industry’s overall quality.

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