CNT CLEAN TECHNIQUE ACTUAL EXAM NEWEST
COMPLETE 130 QUESTIONS AND CORRECT
DETAILED ANSWERS | ALREADY GRADED A+ |
2026/2027 EDITION
Core Domains
• Principles of Clean Technique: Medical Asepsis vs. Surgical Asepsis, Sterile
Field Maintenance
• Hand Hygiene & PPE: Handwashing, Surgical Scrub, Gowning and
Gloving Techniques
• Sterile Field Setup: Draping, Opening Sterile Packages, Pouring Solutions
• Wound Care & Dressing Changes: Sterile Dressing Techniques, Wound
Irrigation, Drain Care
• Catheterization: Indwelling Catheter Insertion, Maintenance, Removal
• Surgical Skin Preparation: Preoperative Shaving vs. Clipping, Antiseptic
Solutions
• Isolation Precautions: Contact, Droplet, Airborne; PPE Sequence, AIIR
Rooms
• Central Line & PICC Care: Dressing Changes, Cap Changes, Site
Assessment
• Specimen Collection: Blood Cultures, Urine Cultures, Wound Cultures,
Sterile Containers
• NG Tube & Suctioning: Sterile Technique for Suctioning, Tube Insertion
and Care
• First Aid & Trauma: Wound Cleaning, Burn Care, Splinting with Sterile
Technique
• Infection Control: Standard Precautions, Transmission-Based Precautions,
OSHA Requirements
,This comprehensive examination guide is designed for nursing students and
healthcare professionals preparing for the CNT Clean Technique certification
exam. Clean technique (medical asepsis) encompasses practices used to reduce the
number and transmission of pathogens, while sterile technique (surgical asepsis)
eliminates all microorganisms. This resource features 130 practice questions with
verified answers and detailed rationales, aligned with current CDC, OSHA, and
AORN standards for infection control and aseptic practice.
SECTION 1: PRINCIPLES OF CLEAN & STERILE TECHNIQUE
(Questions 1-20)
Question 1
What is the difference between clean technique and sterile technique?
A. Clean technique eliminates all microorganisms; sterile technique reduces
microorganisms
B. Clean technique reduces the number of microorganisms; sterile technique
eliminates all microorganisms
C. Both techniques eliminate all microorganisms
D. There is no difference between the two techniques
Correct answer: B
RATIONALE: Clean technique (medical asepsis) reduces the number of
organisms and prevents their spread. It involves hand hygiene, barrier techniques,
and environmental cleaning. Sterile technique (surgical asepsis) eliminates all
microorganisms, including spores, from an area. Sterile technique is used for
invasive procedures, wound care, and catheterization where introducing organisms
could cause infection.
Question 2
The primary purpose of medical asepsis (clean technique) is to:
A. Sterilize surgical instruments
B. Reduce the number of pathogens and prevent their spread
,C. Eliminate all microorganisms from the environment
D. Kill all bacterial spores
Correct answer: B
RATIONALE: Medical asepsis, also called clean technique, aims to reduce the
number of pathogens and prevent their transmission. It involves hand hygiene,
barrier precautions, and maintaining a clean environment. Sterilization is the
process of eliminating all microorganisms, including spores.
Question 3
What is the single most important intervention for preventing the spread of
infection?
A. Wearing gloves
B. Using sterile supplies
C. Hand hygiene
D. Wearing a mask
Correct answer: C
RATIONALE: Hand hygiene is the single most important intervention for
preventing the spread of infection. Hand washing with soap and water or alcohol-
based hand rub reduces the number of transient microorganisms on the hands.
Healthcare workers should perform hand hygiene before and after patient contact,
before sterile procedures, and after contact with body fluids.
Question 4
The recommended time for handwashing with soap and water before a surgical
procedure is:
A. 15-30 seconds
B. 1 minute
C. 2-6 minutes
D. 10 minutes
Correct answer: C
, RATIONALE: Surgical hand antisepsis requires scrubbing with antimicrobial
soap for 2-6 minutes, depending on the product used. The hands should be kept
above the elbows to allow water to flow from clean to less clean areas. The
surgical scrub removes transient microorganisms and reduces resident
microorganisms.
Question 5
Which of the following is considered a break in sterile technique?
A. Reaching over a sterile field
B. Talking over the sterile field
C. Having wetness on the sterile drape
D. All of the above
Correct answer: D
RATIONALE: All of these actions are considered breaks in sterile technique.
Reaching over a sterile field can contaminate it because the unsterile gown or arms
pass over the field. Talking over the sterile field can introduce droplets. Moisture
can wick microorganisms from the non-sterile surface beneath the drape.
Question 6
What is the correct sequence for applying personal protective equipment (PPE)?
A. Gown, mask, goggles, gloves
B. Mask, goggles, gown, gloves
C. Goggles, mask, gown, gloves
D. Gloves, gown, mask, goggles
Correct answer: A
RATIONALE: The correct sequence for donning PPE is: gown, mask, goggles
(or face shield), gloves. The gown protects the clothing first, then the mask and
goggles protect the face, and gloves are applied last to protect the hands. The order
of removal is: gloves, goggles, gown, mask.
COMPLETE 130 QUESTIONS AND CORRECT
DETAILED ANSWERS | ALREADY GRADED A+ |
2026/2027 EDITION
Core Domains
• Principles of Clean Technique: Medical Asepsis vs. Surgical Asepsis, Sterile
Field Maintenance
• Hand Hygiene & PPE: Handwashing, Surgical Scrub, Gowning and
Gloving Techniques
• Sterile Field Setup: Draping, Opening Sterile Packages, Pouring Solutions
• Wound Care & Dressing Changes: Sterile Dressing Techniques, Wound
Irrigation, Drain Care
• Catheterization: Indwelling Catheter Insertion, Maintenance, Removal
• Surgical Skin Preparation: Preoperative Shaving vs. Clipping, Antiseptic
Solutions
• Isolation Precautions: Contact, Droplet, Airborne; PPE Sequence, AIIR
Rooms
• Central Line & PICC Care: Dressing Changes, Cap Changes, Site
Assessment
• Specimen Collection: Blood Cultures, Urine Cultures, Wound Cultures,
Sterile Containers
• NG Tube & Suctioning: Sterile Technique for Suctioning, Tube Insertion
and Care
• First Aid & Trauma: Wound Cleaning, Burn Care, Splinting with Sterile
Technique
• Infection Control: Standard Precautions, Transmission-Based Precautions,
OSHA Requirements
,This comprehensive examination guide is designed for nursing students and
healthcare professionals preparing for the CNT Clean Technique certification
exam. Clean technique (medical asepsis) encompasses practices used to reduce the
number and transmission of pathogens, while sterile technique (surgical asepsis)
eliminates all microorganisms. This resource features 130 practice questions with
verified answers and detailed rationales, aligned with current CDC, OSHA, and
AORN standards for infection control and aseptic practice.
SECTION 1: PRINCIPLES OF CLEAN & STERILE TECHNIQUE
(Questions 1-20)
Question 1
What is the difference between clean technique and sterile technique?
A. Clean technique eliminates all microorganisms; sterile technique reduces
microorganisms
B. Clean technique reduces the number of microorganisms; sterile technique
eliminates all microorganisms
C. Both techniques eliminate all microorganisms
D. There is no difference between the two techniques
Correct answer: B
RATIONALE: Clean technique (medical asepsis) reduces the number of
organisms and prevents their spread. It involves hand hygiene, barrier techniques,
and environmental cleaning. Sterile technique (surgical asepsis) eliminates all
microorganisms, including spores, from an area. Sterile technique is used for
invasive procedures, wound care, and catheterization where introducing organisms
could cause infection.
Question 2
The primary purpose of medical asepsis (clean technique) is to:
A. Sterilize surgical instruments
B. Reduce the number of pathogens and prevent their spread
,C. Eliminate all microorganisms from the environment
D. Kill all bacterial spores
Correct answer: B
RATIONALE: Medical asepsis, also called clean technique, aims to reduce the
number of pathogens and prevent their transmission. It involves hand hygiene,
barrier precautions, and maintaining a clean environment. Sterilization is the
process of eliminating all microorganisms, including spores.
Question 3
What is the single most important intervention for preventing the spread of
infection?
A. Wearing gloves
B. Using sterile supplies
C. Hand hygiene
D. Wearing a mask
Correct answer: C
RATIONALE: Hand hygiene is the single most important intervention for
preventing the spread of infection. Hand washing with soap and water or alcohol-
based hand rub reduces the number of transient microorganisms on the hands.
Healthcare workers should perform hand hygiene before and after patient contact,
before sterile procedures, and after contact with body fluids.
Question 4
The recommended time for handwashing with soap and water before a surgical
procedure is:
A. 15-30 seconds
B. 1 minute
C. 2-6 minutes
D. 10 minutes
Correct answer: C
, RATIONALE: Surgical hand antisepsis requires scrubbing with antimicrobial
soap for 2-6 minutes, depending on the product used. The hands should be kept
above the elbows to allow water to flow from clean to less clean areas. The
surgical scrub removes transient microorganisms and reduces resident
microorganisms.
Question 5
Which of the following is considered a break in sterile technique?
A. Reaching over a sterile field
B. Talking over the sterile field
C. Having wetness on the sterile drape
D. All of the above
Correct answer: D
RATIONALE: All of these actions are considered breaks in sterile technique.
Reaching over a sterile field can contaminate it because the unsterile gown or arms
pass over the field. Talking over the sterile field can introduce droplets. Moisture
can wick microorganisms from the non-sterile surface beneath the drape.
Question 6
What is the correct sequence for applying personal protective equipment (PPE)?
A. Gown, mask, goggles, gloves
B. Mask, goggles, gown, gloves
C. Goggles, mask, gown, gloves
D. Gloves, gown, mask, goggles
Correct answer: A
RATIONALE: The correct sequence for donning PPE is: gown, mask, goggles
(or face shield), gloves. The gown protects the clothing first, then the mask and
goggles protect the face, and gloves are applied last to protect the hands. The order
of removal is: gloves, goggles, gown, mask.
