Sterile Processing Technician CSPDT Certification Exam 2025–2026 | 200 High-Yield Practice Questions with Verified Answers & Explanations | Central Sterile Exam Prep Covering Decontamination, Instrument Reprocessing, Sterilization Cycles, Infection Preven

Sterile Processing Technician CSPDT Certification Exam 2025–2026 |
200 High-Yield Practice Questions with Verified Answers & Explanations |
Central Sterile Exam Prep Covering Decontamination, Instrument
Reprocessing, Sterilization Cycles, Infection Prevention, Quality Control &
Hospital Standards
Question 1:
What is the primary purpose of sterilization in sterile processing?
• A) To enhance the appearance of instruments
• B) To eliminate all microorganisms, including spores
• C) To disinfect surfaces
• D) To package instruments
CORRECT ANSWER: B
Rationale: The primary purpose of sterilization is to eliminate all microorganisms,
including bacterial spores, to ensure that instruments are safe for use in a medical
environment.


Question 2:
Which of the following is the most common method of sterilization used in healthcare
facilities?
• A) Steam sterilization (autoclaving)
• B) Ethylene oxide sterilization
• C) Hydrogen peroxide gas plasma
• D) Dry heat sterilization
CORRECT ANSWER: A
Rationale: Steam sterilization (autoclaving) is the most common method used because
it is effective, efficient, and relatively inexpensive compared to other methods.


Question 3:
What is the recommended cycle time for steam sterilization at 121°C (250°F)?
• A) 15 minutes
• B) 30 minutes
• C) 60 minutes
• D) 20 minutes

,CORRECT ANSWER: B
Rationale: The recommended cycle time for steam sterilization at 121°C is typically
around 30 minutes, ensuring adequate sterilization while considering load and
instrument types.


Question 4:
Which of the following is NOT a critical step in the cleaning process of surgical
instruments?
• A) Rinsing with water
• B) Inspections for defects later
• C) Using enzymatic cleaners
• D) Disassembly of instruments as needed
CORRECT ANSWER: B
Rationale: Inspections for defects should be part of the quality assurance process but
are not a direct step in the initial cleaning phase, which focuses on effective cleaning
and disinfection.


Question 5:
What type of packaging is most appropriate for steam sterilization?
• A) Plastic bags
• B) Sterilization pouches with indicator tape
• C) Heavy-duty cardboard boxes
• D) Cloth wraps
CORRECT ANSWER: B
Rationale: Sterilization pouches with indicator tape are designed for steam
sterilization, allowing for proper penetration of steam and providing a visible indication
that sterilization has occurred.
Question 6:
What is the correct temperature for ethylene oxide sterilization?
• A) 25°C (77°F)
• B) 54°C (130°F)
• C) 30°C (86°F)

, • D) 121°C (250°F)
CORRECT ANSWER: B
Rationale: Ethylene oxide sterilization is conducted at a temperature of about 54°C
(130°F), which is effective for heat-sensitive instruments.


Question 7:
What is considered a biohazard in sterile processing?
• A) Clean instruments
• B) Contaminated instruments
• C) Sterilized instruments
• D) Packaging materials
CORRECT ANSWER: B
Rationale: Contaminated instruments pose a biohazard as they can carry pathogens
that can infect patients and healthcare workers.


Question 8:
Which of the following instruments requires disassembly prior to cleaning?
• A) Scissors
• B) Clamps
• C) Forceps
• D) Needle holders
CORRECT ANSWER: B
Rationale: Clamps often require disassembly to ensure that all surfaces are adequately
cleaned, which is essential for effective sterilization.


Question 9:
What is the purpose of biological indicators in sterilization?
• A) To measure temperature
• B) To assess equipment function
• C) To verify the efficacy of the sterilization process

, • D) To clean instruments
CORRECT ANSWER: C
Rationale: Biological indicators contain live spores and are used to verify that the
sterilization process can kill them, confirming the effectiveness of the sterilization
cycle.


Question 10:
Which of the following is essential for maintaining sterilized items?
• A) Unsealed packaging
• B) Proper storage conditions
• C) High humidity
• D) Plastic containers
CORRECT ANSWER: B
Rationale: Maintaining proper storage conditions, such as keeping items in a clean, dry
area, is essential to preserving the sterility of packaged items.


Question 11:
What is a common method to prevent corrosion of surgical instruments?
• A) Sterilizing in water
• B) Leaving instruments unwrapped
• C) Use of lubricants
• D) High-temperature sterilization
CORRECT ANSWER: C
Rationale: Using lubricants on instruments after cleaning helps prevent corrosion, thus
prolonging the lifespan of the instruments.


Question 12:
Which items require sterile processing?
• A) Non-critical items
• B) Critical items
• C) Semi-critical items