CDT Infection Control & Safety Standards 3

Question 1

Which ventilation requirement helps protect dental laboratory technicians from hazardous dust and chemical vapors?

Accepted Answer

Local exhaust ventilation (LEV) at the point of dust generation

Answer

Local exhaust ventilation captures contaminants at the source before they disperse into the work environment, providing superior protection over dilution ventilation alone.

Question 2

What is the minimum contact time for intermediate-level disinfectants (e.g., EPA-registered hospital disinfectant with tuberculocidal claim) on laboratory surfaces?

Accepted Answer

10 minutes

Answer

Most intermediate-level disinfectants with tuberculocidal claims require a minimum of 10 minutes of wet surface contact to achieve the labeled kill claims.

Question 3

Under OSHA's Hazard Communication Standard (HazCom 2012), how many sections does a Safety Data Sheet (SDS) contain?

Accepted Answer

16

Answer

GHS-aligned SDSs under HazCom 2012 contain exactly 16 standardized sections covering identification, hazards, composition, and safe handling.

Question 4

Which hepatitis virus is most commonly associated with occupational risk in dental laboratory settings due to its stability on environmental surfaces?

Accepted Answer

Hepatitis B

Answer

Hepatitis B virus (HBV) can survive on dry environmental surfaces for up to 7 days and is the primary vaccine-preventable occupational bloodborne pathogen concern.

Question 5

When should a dental laboratory technician change gloves during case processing?

Accepted Answer

Between each patient case and when gloves are torn or contaminated

Answer

Gloves must be changed between patient cases and whenever they are damaged, torn, or contaminated to prevent cross-contamination.

(CDT) Certified Dental Technicians Practice Test

(CDT) Certified Dental Technicians Practice Test

CDT Infection Control & Safety Standards 3