Fundamentals of Dental Hygiene Final Exam
FUNDAMENTALS OF DENTAL
HYGIENE FINAL 250 EXAM QUESTIONS
AND ANSWERS
1. Microbial load or organic material on a surface or object before disinfection
or sterilization is called? a. germicide
b. asepsis
c. residential flora
d. bioburden: d. Bioburden
2. Inanimate objects are classified as critical, semi critical, non critical and
environmental surfaces. Which of these categories would you place the
air/water syringe tip? a. critical
b. semi critical
c. non critical
d. environmental surface: b. Semi-critical
3. Which of the following methods will achieve sterilization?
a. dry heat at 320 F for 120 minutes
b. steam autoclave at 250 F for 15-30 minutes
c. chemical vapor at 270 F for 20 minutes
d. all of the above: d. all of the above
4. All of the following types of viral hepatitis are blood-borne EXCEPT: a.
Hepatitis A
b. Hepatits B
c. Hepatitis C
d. Hepatitis D: a. Hepatitis A
5. Which of the following is an autoclave sterilizer?
a. Chemical Vapor
b. Steam under pressure
c. Dry heat
, Fundamentals of Dental Hygiene Final Exam
d. ethylene oxide: b. steam under pressure
6. High-level disinfectants may inactivate spores and all forms of bacteria,
fungi, and viruses. Intermediate-level disinfectants inactivate all forms of
microorganisms but do not destroy spores.
a. The first statement is false, and the second statement is true.
b. The first statement is false, and the second statement is false.
c. The first statement is true, and the second statement is false.
d. The first statement is true, and the second statement is true.: d. the first
statement is true and the second statement is true.
7. Which of the following factors are links in the chain of disease
transmission?
a. A susceptible host
b. an infectious agent
c. a reservoir
d. a port of entry and exit
e. all of the above: e. all of the above
8. Which of the following is a disadvantage of the dry heat (oven-type) method
of sterilization?
a. harmful chemical fumes
b. carbon steel instruments will corrode
c. a long cycle is required for sterilization
d. a special solution is required for sterilization: c. a long cycle is required for
sterilization
9. Cross Contanimation refers to the spread of microorganisms from one
source to another; this may include which of the following?
a. person-to-person, person to inanimate object, and inanimate object to
person
b. person to inanimate object only
c.inanimate object to person only
d. person-to-person only
e. person to inanimate object and inanimate object to person only: a.
person-to-person, person to inanimate object, and inanimate object to person
, Fundamentals of Dental Hygiene Final Exam
10. Tuberculosis infection is most commonly transmitted by:
a. sexual conduct
b. inhalations of aerosols
c. fecal oral route
d. contaminated blood: b. inhalations of aerosols
11. Splashing saliva or fluid from a vesicular lesion directly in an unprotected
eye can result in: a. HIV-1 infection
b. Hepatitis A
c. Herpetic Whitlow
d. Ocular Herpes: d. ocular herpes
12. Sterilization bags with indicator marks and indicator packaging tape are
used to ensure package content is sterile. a. true
b. false: b. false
13. What is the purpose of wiping the dental operatory twice with disinfectant?
a. once to clean debris from the surfaces and once to disinfect the surfaces
b. you do not have to wipe the surfaces twice
c. to make sure you did not miss any debris the first time
d. to ensure sterilization of the surfaces: a. once to clean debris from the
surfaces and once to disinfect the surfaces
14. Which of the following is NOT likely to result in musculoskeletal pain?
a. leaning forward slightly from the waist and hips
b. bending the hand up or down repeatedly at the wrist
c. forceful gripping with the fingers
d. hunching the shoulders forward: a. leaning forward slightly from the waist and
hips
15. Which is the specific function of the middle finger when utilizing the
modified pen grasp?
a. To hold and stabilize the instrument handle
b. To stabilize the instrument in the mouth for control and strength
c. To roll the instrument handle to maintain adaptation
d. To feel vibrations transmitted from the working-end: d. To feel vibrations
transmitted from the working-end
FUNDAMENTALS OF DENTAL
HYGIENE FINAL 250 EXAM QUESTIONS
AND ANSWERS
1. Microbial load or organic material on a surface or object before disinfection
or sterilization is called? a. germicide
b. asepsis
c. residential flora
d. bioburden: d. Bioburden
2. Inanimate objects are classified as critical, semi critical, non critical and
environmental surfaces. Which of these categories would you place the
air/water syringe tip? a. critical
b. semi critical
c. non critical
d. environmental surface: b. Semi-critical
3. Which of the following methods will achieve sterilization?
a. dry heat at 320 F for 120 minutes
b. steam autoclave at 250 F for 15-30 minutes
c. chemical vapor at 270 F for 20 minutes
d. all of the above: d. all of the above
4. All of the following types of viral hepatitis are blood-borne EXCEPT: a.
Hepatitis A
b. Hepatits B
c. Hepatitis C
d. Hepatitis D: a. Hepatitis A
5. Which of the following is an autoclave sterilizer?
a. Chemical Vapor
b. Steam under pressure
c. Dry heat
, Fundamentals of Dental Hygiene Final Exam
d. ethylene oxide: b. steam under pressure
6. High-level disinfectants may inactivate spores and all forms of bacteria,
fungi, and viruses. Intermediate-level disinfectants inactivate all forms of
microorganisms but do not destroy spores.
a. The first statement is false, and the second statement is true.
b. The first statement is false, and the second statement is false.
c. The first statement is true, and the second statement is false.
d. The first statement is true, and the second statement is true.: d. the first
statement is true and the second statement is true.
7. Which of the following factors are links in the chain of disease
transmission?
a. A susceptible host
b. an infectious agent
c. a reservoir
d. a port of entry and exit
e. all of the above: e. all of the above
8. Which of the following is a disadvantage of the dry heat (oven-type) method
of sterilization?
a. harmful chemical fumes
b. carbon steel instruments will corrode
c. a long cycle is required for sterilization
d. a special solution is required for sterilization: c. a long cycle is required for
sterilization
9. Cross Contanimation refers to the spread of microorganisms from one
source to another; this may include which of the following?
a. person-to-person, person to inanimate object, and inanimate object to
person
b. person to inanimate object only
c.inanimate object to person only
d. person-to-person only
e. person to inanimate object and inanimate object to person only: a.
person-to-person, person to inanimate object, and inanimate object to person
, Fundamentals of Dental Hygiene Final Exam
10. Tuberculosis infection is most commonly transmitted by:
a. sexual conduct
b. inhalations of aerosols
c. fecal oral route
d. contaminated blood: b. inhalations of aerosols
11. Splashing saliva or fluid from a vesicular lesion directly in an unprotected
eye can result in: a. HIV-1 infection
b. Hepatitis A
c. Herpetic Whitlow
d. Ocular Herpes: d. ocular herpes
12. Sterilization bags with indicator marks and indicator packaging tape are
used to ensure package content is sterile. a. true
b. false: b. false
13. What is the purpose of wiping the dental operatory twice with disinfectant?
a. once to clean debris from the surfaces and once to disinfect the surfaces
b. you do not have to wipe the surfaces twice
c. to make sure you did not miss any debris the first time
d. to ensure sterilization of the surfaces: a. once to clean debris from the
surfaces and once to disinfect the surfaces
14. Which of the following is NOT likely to result in musculoskeletal pain?
a. leaning forward slightly from the waist and hips
b. bending the hand up or down repeatedly at the wrist
c. forceful gripping with the fingers
d. hunching the shoulders forward: a. leaning forward slightly from the waist and
hips
15. Which is the specific function of the middle finger when utilizing the
modified pen grasp?
a. To hold and stabilize the instrument handle
b. To stabilize the instrument in the mouth for control and strength
c. To roll the instrument handle to maintain adaptation
d. To feel vibrations transmitted from the working-end: d. To feel vibrations
transmitted from the working-end
