Test Flashcards
7 cards from real CBIC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Test flashcards as text
Which statistical test is most appropriate when comparing infection rates between two independent groups with large sample sizes?
Answer: Chi-square test
The chi-square test is appropriate for comparing proportions or rates between two or more independent groups when sample sizes are large.
Under the NHSN definition, a healthcare-associated infection (HAI) is generally considered present when it occurs at least how many hours after admission?
Answer: 48 hours
NHSN defines a healthcare-associated infection as one that occurs 48 hours or more after admission, when no evidence of infection was present at admission.
Which element is NOT part of the chain of infection?
Answer: Vector capacity
The chain of infection consists of infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host; 'vector capacity' is not a named link in the chain.
A hospital experiences an increase in ventilator-associated events (VAE). Which intervention targets the most evidence-based prevention bundle element?
Answer: Daily sedation interruption and spontaneous breathing trials
Daily sedation interruption paired with spontaneous breathing trials is a core bundle element that reduces ventilator days and associated events.
Which personal protective equipment (PPE) sequence is correct when donning for contact and droplet precautions?
Answer: Gown → mask → goggles → gloves
CDC guidance specifies donning in the order gown, mask/respirator, goggles/face shield, then gloves so that gloves cover gown cuffs and are the last item to be donned.
Which bloodborne pathogen has the highest risk of transmission following a needlestick injury from an infected source?
Answer: Hepatitis B virus (HBV)
HBV has a transmission risk of approximately 6–30% per needlestick from an HBeAg-positive source, far higher than HCV (~1.8%) or HIV (~0.3%).
An outbreak investigation reveals that the epidemic curve has a single sharp peak. This pattern is most consistent with which type of outbreak?
Answer: Common source point-source outbreak
A single sharp peak on an epidemic curve indicates a point-source outbreak where most cases were exposed to the same source during a brief period.
How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- cbic.org — Time limit, retake fee, retake policy, score release, score validity, renewal, eligibility, test delivery, fees, exam format · verified Oct 2026