DHT 1115 Fundamentals of Dental Hygiene Final Exam with Correct Question And Answers
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Course
DHT 1115 Fundamentals of Dental Hygiene
Institution
DHT 1115 Fundamentals Of Dental Hygiene
DHT 1115 Fundamentals of Dental Hygiene Final
Exam with Correct Question And Answers 2023-
2024
To treat surfaces AWAY from you on the maxillary posterior teeth, the clinician should
be seated in which position?
a. Front (R: 8 o'clock/ L: 4 o'clock)
b. Back (12 o'clock)
c. Mid-Back (R: 10-11...
DHT 1115 Fundamentals of Dental Hygiene Final
Exam with Correct Question And Answers 2023-
2024
,To treat surfaces AWAY from you on the maxillary posterior teeth, the clinician should
be seated in which position?
a. Front (R: 8 o'clock/ L: 4 o'clock)
b. Back (12 o'clock)
c. Mid-Back (R: 10-11 o'clock/ L: 1-2 o'clock)
d. Any position is acceptable to treat this area - ANSWER-c. Mid-Back (R: 10-11
o'clock/ L: 1-2 o'clock)
The backrest of the clinician's chair should be positioned to touch the lumbar region of
the back when the clinician is comfortably seated. The patient's heels should be slightly
higher than the tip of his or her nose when positioned in a supine position.
a. The first statement is false and the second statement is true.
b. The first statement is false and the first statement is false.
c. The first statement is true and the first statement is false.
d. The first statement is true and the first statement is true. - ANSWER-d. The first
statement is true and the first statement is true.
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 - ANSWER-d. Bioburden
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 - ANSWER-b. Semi-critical
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 - ANSWER-d. all of the above
All of the following types of viral hepatitis are blood-borne EXCEPT:
a. Hepatitis A
b. Hepatits B
c. Hepatitis C
d. Hepatitis D - ANSWER-a. Hepatitis A
, Which of the following is an autoclave sterilizer?
a. Chemical Vapor
b. Steam under pressure
c. Dry heat
d. ethylene oxide - ANSWER-b. steam under pressure
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. - ANSWER-d. the first
statement is true and the second statement is true.
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 - ANSWER-e. all of the above
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 - ANSWER-c. a long cycle is required for
sterilization
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 - ANSWER-a.
person-to-person, person to inanimate object, and inanimate object to person
Tuberculosis infection is most commonly transmitted by:
a. sexual conduct
b. inhalations of aerosols
c. fecal oral route
d. contaminated blood - ANSWER-b. inhalations of aerosols
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