A-IPC Exam Study Guide (Practice Test #1) 2026/2027 – 135
Reviewed Questions with 100% Verified Answers 3 versions
Ace your Certification Board of Infection Control and Epidemiology entry-level exam
with this comprehensive A-IPC Practice Test #1 study guide. This premium resource
features 135 thoroughly reviewed questions tracking key exam domains like
epidemiology calculations, isolation precautions, and the Spaulding classification
system. Every question includes 100% verified answers and deep rationales to solidify
your infection prevention clinical reasoning.
QUESTION 1
A patient develops a bloodstream infection 48 hours after central line insertion. This
infection is classified as:
A. Community-acquired infection
B. Healthcare-associated infection (HAI)
C. Opportunistic infection
D. Iatrogenic infection
Correct Answer: B. Healthcare-associated infection (HAI)
Rationale: Healthcare-associated infections (HAIs) are infections acquired during the
course of receiving healthcare that were not present at the time of admission. This
patient's bloodstream infection developed after central line insertion during
hospitalization, meeting the criteria for an HAI, specifically a central line-associated
bloodstream infection (CLABSI).
QUESTION 2
Which of the following is the MOST effective single intervention to prevent healthcare-
associated infections?
A. Use of personal protective equipment
B. Hand hygiene
,C. Environmental cleaning
D. Antimicrobial stewardship
Correct Answer: B. Hand hygiene
Rationale: Hand hygiene is the single most effective measure to prevent the transmission
of healthcare-associated pathogens. While PPE, environmental cleaning, and antimicrobial
stewardship are all important components of infection prevention, hand hygiene remains
the cornerstone of all infection control practices.
QUESTION 3
Which of the following represents the correct sequence of the Chain of Infection?
A. Susceptible host → Portal of entry → Mode of transmission → Reservoir → Portal of
exit → Infectious agent
B. Infectious agent → Reservoir → Portal of exit → Mode of transmission → Portal of
entry → Susceptible host
C. Reservoir → Infectious agent → Portal of exit → Mode of transmission → Portal of
entry → Susceptible host
D. Mode of transmission → Portal of entry → Susceptible host → Infectious agent →
Reservoir → Portal of exit
Correct Answer: B. Infectious agent → Reservoir → Portal of exit → Mode of
transmission → Portal of entry → Susceptible host
Rationale: The Chain of Infection begins with the infectious agent, which resides in a
reservoir, exits through a portal of exit, is transmitted via a mode of transmission, enters a
new host through a portal of entry, and infects a susceptible host. Breaking any link
prevents infection.
QUESTION 4
A patient with active pulmonary tuberculosis requires which type of transmission-based
precaution?
,A. Contact precautions
B. Droplet precautions
C. Airborne precautions
D. Standard precautions only
Correct Answer: C. Airborne precautions
Rationale: Pulmonary tuberculosis is transmitted via airborne droplet nuclei that remain
suspended in the air. Airborne precautions require an airborne infection isolation room
(AIIR) with negative pressure, and healthcare personnel must wear N95 or higher-level
respiratory protection.
QUESTION 5
Which organism requires Contact Precautions and is NOT effectively killed by alcohol-
based hand sanitizer?
A. Methicillin-resistant Staphylococcus aureus (MRSA)
B. Vancomycin-resistant Enterococcus (VRE)
C. Clostridioides difficile
D. Pseudomonas aeruginosa
Correct Answer: C. Clostridioides difficile
Rationale: C. difficile spores are resistant to alcohol-based hand sanitizers. Handwashing
with soap and water is required for mechanical removal of spores. Contact Precautions
(gown and gloves) are required. MRSA, VRE, and Pseudomonas are also Contact
Precautions but are susceptible to alcohol-based hand sanitizers.
QUESTION 6
A patient with confirmed influenza requires which type of transmission-based
precaution?
A. Contact precautions
B. Droplet precautions
, C. Airborne precautions
D. Protective environment
Correct Answer: B. Droplet precautions
Rationale: Influenza is transmitted primarily through respiratory droplets produced by
coughing, sneezing, or talking. Droplet precautions require a private room or cohorting,
and healthcare personnel should wear a surgical mask when within 3 feet of the patient.
QUESTION 7
The incubation period is defined as:
A. The time from exposure to an infectious agent to the onset of clinical symptoms
B. The time from the onset of symptoms to recovery
C. The period when the patient is most contagious
D. The time from diagnosis to initiation of treatment
Correct Answer: A. The time from exposure to an infectious agent to the onset of
clinical symptoms
Rationale: The incubation period is the interval between exposure to a pathogenic
organism and the appearance of clinical signs and symptoms. This period varies
depending on the organism and can range from hours to months. Understanding
incubation periods helps in determining the timing of exposure and implementing control
measures.
QUESTION 8
Which of the following is the MOST significant risk factor for catheter-associated urinary
tract infections (CAUTI)?
A. Female gender
B. Indwelling urinary catheter use
C. Advanced age
D. Diabetes mellitus
Reviewed Questions with 100% Verified Answers 3 versions
Ace your Certification Board of Infection Control and Epidemiology entry-level exam
with this comprehensive A-IPC Practice Test #1 study guide. This premium resource
features 135 thoroughly reviewed questions tracking key exam domains like
epidemiology calculations, isolation precautions, and the Spaulding classification
system. Every question includes 100% verified answers and deep rationales to solidify
your infection prevention clinical reasoning.
QUESTION 1
A patient develops a bloodstream infection 48 hours after central line insertion. This
infection is classified as:
A. Community-acquired infection
B. Healthcare-associated infection (HAI)
C. Opportunistic infection
D. Iatrogenic infection
Correct Answer: B. Healthcare-associated infection (HAI)
Rationale: Healthcare-associated infections (HAIs) are infections acquired during the
course of receiving healthcare that were not present at the time of admission. This
patient's bloodstream infection developed after central line insertion during
hospitalization, meeting the criteria for an HAI, specifically a central line-associated
bloodstream infection (CLABSI).
QUESTION 2
Which of the following is the MOST effective single intervention to prevent healthcare-
associated infections?
A. Use of personal protective equipment
B. Hand hygiene
,C. Environmental cleaning
D. Antimicrobial stewardship
Correct Answer: B. Hand hygiene
Rationale: Hand hygiene is the single most effective measure to prevent the transmission
of healthcare-associated pathogens. While PPE, environmental cleaning, and antimicrobial
stewardship are all important components of infection prevention, hand hygiene remains
the cornerstone of all infection control practices.
QUESTION 3
Which of the following represents the correct sequence of the Chain of Infection?
A. Susceptible host → Portal of entry → Mode of transmission → Reservoir → Portal of
exit → Infectious agent
B. Infectious agent → Reservoir → Portal of exit → Mode of transmission → Portal of
entry → Susceptible host
C. Reservoir → Infectious agent → Portal of exit → Mode of transmission → Portal of
entry → Susceptible host
D. Mode of transmission → Portal of entry → Susceptible host → Infectious agent →
Reservoir → Portal of exit
Correct Answer: B. Infectious agent → Reservoir → Portal of exit → Mode of
transmission → Portal of entry → Susceptible host
Rationale: The Chain of Infection begins with the infectious agent, which resides in a
reservoir, exits through a portal of exit, is transmitted via a mode of transmission, enters a
new host through a portal of entry, and infects a susceptible host. Breaking any link
prevents infection.
QUESTION 4
A patient with active pulmonary tuberculosis requires which type of transmission-based
precaution?
,A. Contact precautions
B. Droplet precautions
C. Airborne precautions
D. Standard precautions only
Correct Answer: C. Airborne precautions
Rationale: Pulmonary tuberculosis is transmitted via airborne droplet nuclei that remain
suspended in the air. Airborne precautions require an airborne infection isolation room
(AIIR) with negative pressure, and healthcare personnel must wear N95 or higher-level
respiratory protection.
QUESTION 5
Which organism requires Contact Precautions and is NOT effectively killed by alcohol-
based hand sanitizer?
A. Methicillin-resistant Staphylococcus aureus (MRSA)
B. Vancomycin-resistant Enterococcus (VRE)
C. Clostridioides difficile
D. Pseudomonas aeruginosa
Correct Answer: C. Clostridioides difficile
Rationale: C. difficile spores are resistant to alcohol-based hand sanitizers. Handwashing
with soap and water is required for mechanical removal of spores. Contact Precautions
(gown and gloves) are required. MRSA, VRE, and Pseudomonas are also Contact
Precautions but are susceptible to alcohol-based hand sanitizers.
QUESTION 6
A patient with confirmed influenza requires which type of transmission-based
precaution?
A. Contact precautions
B. Droplet precautions
, C. Airborne precautions
D. Protective environment
Correct Answer: B. Droplet precautions
Rationale: Influenza is transmitted primarily through respiratory droplets produced by
coughing, sneezing, or talking. Droplet precautions require a private room or cohorting,
and healthcare personnel should wear a surgical mask when within 3 feet of the patient.
QUESTION 7
The incubation period is defined as:
A. The time from exposure to an infectious agent to the onset of clinical symptoms
B. The time from the onset of symptoms to recovery
C. The period when the patient is most contagious
D. The time from diagnosis to initiation of treatment
Correct Answer: A. The time from exposure to an infectious agent to the onset of
clinical symptoms
Rationale: The incubation period is the interval between exposure to a pathogenic
organism and the appearance of clinical signs and symptoms. This period varies
depending on the organism and can range from hours to months. Understanding
incubation periods helps in determining the timing of exposure and implementing control
measures.
QUESTION 8
Which of the following is the MOST significant risk factor for catheter-associated urinary
tract infections (CAUTI)?
A. Female gender
B. Indwelling urinary catheter use
C. Advanced age
D. Diabetes mellitus
