BSN 206 Quiz 3 Infection Control, Asepsis, and Isolation Precautions (Module 3 50 QUESTIONS correct answers and rationales).

BSN 206 Quiz 3 Infection Control, Asepsis, and Isolation Precautions (Module 3 50
QUESTIONS correct answers and rationales)
covers epidemiologic chains, clean vs. sterile techniques, and evidence-based transmission
precautions.

1. Which link in the chain of infection is broken when a nurse performs meticulous hand
hygiene?

 A) Reservoir
 B) Portal of exit
 C) Mode of transmission
 D) Susceptible host
 Rationale: Hand hygiene directly disrupts the vehicle or path of transmission, stopping
the transfer of pathogens from one surface or person to another.

1. A patient is diagnosed with an infection caused by a spore-forming organism called
Clostridioides difficile. Which hand hygiene protocol is mandatory?

 A) Alcohol-based hand foam for 15 seconds
 B) Washing hands thoroughly with antimicrobial soap and water
 C) Friction with an iodine solution
 D) Rinsing with sterile normal saline
 Rationale: Alcohol rubs are ineffective against structural bacterial spores. Physical
friction with soap and running water is required to mechanically rinse spores from the
skin surface.

1. Which procedure requires the nurse to adhere strictly to surgical asepsis (sterile
technique)?

 A) Administering a regular tap-water cleansing enema
 B) Inserting an indwelling urinary catheter
 C) Changing a clean bed linen array
 D) Measuring an oral digital temperature
 Rationale: Catheterization introduces a device directly into a sterile body cavity (the
bladder) and requires strict sterile technique to prevent healthcare-associated infections.

1. When establishing a sterile field, what width of the outer border or edge of the sterile
drape is considered unsterile?

 A) 1 inch (2.5 cm)
 B) 2 inches (5.0 cm)
 C) 0.5 inches (1.2 cm)
 D) 3 inches (7.5 cm)
 Rationale: Standard surgical asepsis guidelines state that a 1-inch margin around the
entire perimeter of a sterile field is contaminated and may be touched with clean hands.

, 1. A nurse is preparing to care for a patient with active pulmonary tuberculosis. Which
protective equipment is legally required?

 A) Standard surgical mask
 B) Fitted N95 respirator or PAPR device
 C) Clean examination gown alone
 D) Sterile surgical gloves
 Rationale: Tuberculosis is transmitted via tiny airborne droplet nuclei that stay suspended
in the air. An N95 respirator or higher filtration device is mandatory to filter out these
microscopic particles.

1. What is the correct chronological sequence for donning personal protective equipment
(PPE)?

 A) Gloves, Gown, Mask, Goggles
 B) Mask, Goggles, Gown, Gloves
 C) Gown, Mask, Goggles/Face Shield, Gloves
 D) Goggles, Gown, Gloves, Mask
 Rationale: The standard CDC sequence for donning PPE is designed to optimize
coverage and ensure gloves securely fit over the cuffs of the protective gown.

1. Which item of personal protective equipment (PPE) should generally be removed first
when leaving an isolation room?

 A) Gown
 B) Mask
 C) Gloves
 D) Goggles
 Rationale: Gloves are considered the most heavily contaminated piece of PPE and must
be removed first to avoid spreading pathogens to other gear or the body during removal.

1. An infection that is contracted directly within a hospital or healthcare facility during a
patient's stay is called:

 A) Idiopathic infection
 B) Healthcare-Associated Infection (HAI)
 C) Community-acquired infection
 D) Endogenous benign colonization
 Rationale: Healthcare-Associated Infections (HAIs), or nosocomial infections, develop
during medical treatment that was not present or incubating upon admission.

1. An object or substance that is capable of transmitting infectious organisms from one
individual to another is defined as a:

 A) Vector
 B) Fomite