NBDHE NBDHE Infection Control and Sterilization

Question 1

Which type of instrument requires sterilization according to the Spaulding classification for 'critical' items?

Accepted Answer

Instruments that penetrate soft tissue or bone

Answer

Instruments that contact mucous membranes only

Answer

Items that touch only intact skin

Answer

Environmental surfaces in the operatory

Question 2

The standard gravity displacement autoclave operates at which temperature and duration for wrapped instruments?

Accepted Answer

250°F (121°C) for 15-30 minutes

Answer

212°F (100°C) for 20 minutes

Answer

270°F (132°C) for 3-4 minutes

Answer

320°F (160°C) for 60 minutes

Question 3

Which bloodborne pathogen poses the GREATEST transmission risk per needlestick exposure in the dental setting?

Accepted Answer

Hepatitis B virus (HBV)

Answer

HIV

Answer

Hepatitis C virus (HCV)

Answer

Hepatitis A virus (HAV)

Question 4

According to standard precautions, gloves must be changed:

Accepted Answer

Between patients and when torn or punctured

Answer

Every 30 minutes during patient care

Answer

Only when visibly contaminated with blood

Answer

At the end of each clinical session

Question 5

Which item is classified as 'semicritical' in the Spaulding classification system?

Accepted Answer

Reusable impression tray

Answer

Surgical scalpel blade

Answer

Dental chair armrest

Answer

Lead apron used for radiography

Question 6

What level of disinfection is required for clinical contact surfaces in the dental operatory?

Accepted Answer

Intermediate-level disinfection

Answer

Sterilization

Answer

High-level disinfection

Answer

Low-level disinfection

Question 7

OSHA's Bloodborne Pathogens Standard requires employers to offer hepatitis B vaccination to:

Accepted Answer

Employees with potential occupational exposure to blood or OPIM

Answer

All employees regardless of job duties

Answer

Only licensed dental professionals

Answer

Employees only after a documented exposure incident