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Infection Control for Dental Assisting Exam Practice Problems

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Updated on Jun 23, 2011

The study guide for these practice problems can be found at:

Infection Control for Dental Assisting Exam Study Guide

1. The condition of being free of pathogenic microorganisms is known as

a. asepsis.

b. sepsis.

c. sterile.

d. both b and c

e. none of the above

2. Which of the following disinfectants is commonly known as “household bleach”?

a. chlorine

b. sodium hypochlorite

c. iodophors

d. gluteraldehyde

e. both b and d

3. What is the length of one autoclave cycle?

a. 15 minutes

b. 1 hour

c. 30 minutes

d. 45 minutes

e. none of the above

4. How does the autoclave sterilize instruments?

a. steam under pressure

b. vapors under pressure

c. chemicals under pressure

d. dry heat

e. both a and d

5. What does a chemiclave sterilizer run on?

a. tap water

b. vapo-sterile solution

c. distilled water

d. general purpose cleaner

e. bottled water 

6. Which of the following is an example of a semi-critical instrument?

a. amalgam condenser

b. bur

c. bone chisel

d. Snap-A-Ray X-ray holder

e. scalpel

7. Which of the following is an example of a critical instrument?

a. scalpel

b. gingival margin trimmer

c. bur

d. both a and c

e. all of the above

8. Which of the following is an example of a non-critical instrument?

a. mouth mirror

b. explorer

c. Snap-A-Ray X-ray holder

d. perio probe

e. both a and c

9. How should alginate impressions be disinfected?

a. autoclaving

b. soaking in disinfectant

c. spraying with disinfectant and wrapping in a moist paper towel

d. immersing in the ultrasonic cleaner

e. both b and c

10. What is bioburden?

a. blood, saliva, and/or OPIM

b. debris not visible to the human eye

c. bacteria found in the sterilization room

d. material that cannot be removed from surfaces or instruments

e. both a and d

11. What does the ultrasonic cleaner do?

a. loosens debris from instruments

b. adheres debris to the instruments

c. safely and more effectively cleans than hand-scrubbing instruments

d. not used in the dental office

e. both a and c

12. Gluteraldehydes are used for

a. cold sterilization.

b. immersion disinfection purposes.

c. penetration of blood, saliva, and OPIM.

d. surface disinfection in dental treatment rooms.

e. a, b, and c

13. How often should biological monitoring of sterilization equipment be done?

a. daily

b. weekly

c. monthly

d. yearly

e. none of the above

14. Which infection poses the greatest risk of patient-to-dental professional transfer?

a. HIV

b. Hepatitis B

c. measles

d. common cold

e. flu

15. What is the term for treating every patient as if he or she were potentially infectious?

a. standard precautions

b. universal precautions

c. no precautions

d. awareness

e. both a and b

16. What is the term for following a specific routine for sterilization and disinfection?

a. standard precautions

b. universal precautions

c. pathogenic precautions

d. both a and c

e. none of the above

17. Which of the following is an example of PPE?

a. saliva ejector

b. rubber dam

c. mask

d. gloves

e. both c and d

18. Which of the following agencies issues regulations in regards to employee safety?

a. Environmental Protection Agency (EPA)

b. Centers for Disease Control and Prevention (CDC)

c. Occupational Safety and Health Administration (OSHA)

d. National Institute of Occupational Safety and Health (NIOSH)

e. both c and d

19. What is the most critical PPE?

a. gloves

b. lab coat

c. mask

d. eyewear/face shield

e. leather shoes

20. What is the proper order for donning/performing PPE?

a. lab coat, wash hands, gloves, eyewear, mask

b. lab coat, mask, eyewear, wash hands, gloves

c. lab coat, eyewear, mask, wash hands, gloves

d. wash hands, lab coat, mask, eyewear, gloves

e. mask, lab coat, eyewear, wash hands, gloves

21. Which of the following is an example of a percutaneous injury?

a. needle stick

b. accidentally being cut with an instrument

c. aerosol spatter during a procedure

d. splashed with a substance in the eyes or mouth

e. both a and b

22. A chairside dental assistant falls under which category of occupational exposure?

a. Category I

b. Category II

c. Category III

d. Category IV

e. none of the above 

23. Utility gloves are utilized in a dental office for which of the following tasks?

a. setting up the operatory

b. disposing of sharps

c. handling instruments while preparing for sterilization

d. disinfecting the operatory following patient care

e. both c and d

24. What is the procedure for preparing the high-speed hand piece for sterilization?

a. placed into the ultrasonic cleaner prior to bagging

b. disassembled and lubricated

c. flushed, wiped down with alcohol or disinfectant, and bagged

d. soaked in disinfectant

e. both a and c

25. PPE worn during each procedure is determined by the dentist.

a. True

b. False

26. Overloading the sterilizer can cause sterilization failure.

a. True

b. False

27. The ultrasonic cleaner works by using light waves.

a. True

b. False

28. Cold sterilization is achieved in six hours.

a. True

b. False

29. High-level disinfection kills all bacterial spores.

a. True

b. False

30. It is not mandatory for a dentist/employer to offer the Hepatitis B Vaccine (HBV) to a new employee.

a. True

b. False

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