Chairside Assisting for Dental Assisting Exam Practice Problems

Updated on Jun 23, 2011

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

Chairside Assisting for Dental Assisting Exam Study Guide

1. What is the operator zone for a right-handed dentist?

a. 2–4

b. 1–6

c. 7–12

d. 12–2

e. none of the above

2. What is the assistant’s zone for a right-handed operator?

a. 9–11

b. 12–2

c. 2–4

d. 4–7

e. none of the above

3. What is the transfer of instruments between the operator and the assistant called?

a. six-handed dentistry

b. four-handed dentistry

c. two-handed dentistry

d. none of the above

e. both b and c

4. In which grasp can the HVE be held?

a. modified pen

b. reversed modified pen

c. thumb-to-nose

d. both a and c

e. none of the above

5. When positioned at the chair, where should the assistant be relative to the operator?

a. 3–5 inches lower

b. parallel

c. 2–5 inches higher

d. 4–6 inches higher

e. none of the above

6. What is the chair position called when patients are flat on their backs?

a. upright

b. semi-supine

c. subsupine

d. supine

e. none of the above

7. In what form is the most common topical anesthetic supplied?

a. liquid

b. gel

c. pill

d. spray

e. none of the above

8. In what area is a block injection given?

a. mental nerve

b. incisive nerve

c. mental foramen

d. trigeminal nerve

e. both b and d

9. What is an injection given on the maxilla called?

a. block

b. infiltration

c. mental

d. incisive

e. both b and c

10. How should needles be disposed?

a. regular garbage

b. trash marked biohazard

c. the sharps container

d. none of the above

e. both b and c

11. What does a vasoconstrictor cause?

a. blood vessels to narrow

b. blood vessels to expand

c. blood vessels to burst

d. increase in length of duration

e. both a and d

12. How is parasthesia defined?

a. injection into the muscle

b. swelling of blood in the tissues

c. injury to the nerve causing permanent numbness

d. both a and b

e. both a and c

13. Nitrous oxide is a combination of what two gases?

a. oxygen and helium

b. nitrogen and carbon dioxide

c. oxygen and nitrogen

d. nitrogen and helium

e. both c and d

14. What color is an oxygen tank?

a. blue

b. green

c. yellow

d. black

e. both a and b

15. What color is a nitrous-oxide tank?

a. blue

b. green

c. yellow

d. black

e. both a and b

16. How is nitrous oxide administered?

a. inhalation

b. transdermal

c. sublingual

d. both a and b

e. both a and c

17. What is the use of the largest hole in the rubber dam punch?

a. maxillary incisors

b. mandibular premolars/bicuspids

c. mandibular cuspids

d. the anchor tooth

e. maxillary molars

18. In which specialty of dentistry is single-tooth isolation used?

a. prosthodontics

b. orthodontics

c. periodontics

d. endodontics

e. pedodontics

19. What is the size of a posterior dental rubber dam?

a. 4 x 4

b. 5 x 5

c. 3 x 3

d. 6 x 6

e. both b and d

20. Which dental-dam punch-hole number is used for placement on a premolar/bicuspid?

a. 1

b. 2

c. 3

d. 4

e. 5

21. In the removal of a dental dam, with what is the septum cut?

a. interproximal knife

b. surgical scissors

c. a beavertail burnisher

d. crown and bridge scissors

e. both a and d

22. How many teeth should be punched in an average rubber dam?

a. 1

b. 5

c. 6–8

d. 8–10

e. both a and b

23. What is the normal resting pulse rate for an adult?

a. 60–100 beats per minute

b. 40–65 beats per minute

c. 50–100 beats per minute

d. 100–150 beats per minute

e. 120 beats per minute

24. When taking blood pressure, which is the systolic reading?

a. lower number

b. higher number

c. it is not a number

d. middle number

e. none of the above

25. One of the assistant’s main responsibilities at the chair, besides the patient’s safety, is the portable unit. What makes up the portable unit?

a. HVE, saliva ejector, light

b. HVE, saliva ejector, air/water syringe

c. HVE, light, hand pieces

d. instruments, disposables, saliva ejector

e. both c and d

26. How are cavities occurring in the pit and fissures on the occlusal surfaces classified?

a. Class I

b. Class II

c. Class III

d. Class IV

e. Class V

27. How are cavities occurring along the interproximal and incisal edge of anterior teeth classified?

a. Class I

b. Class II

c. Class III

d. Class IV

e. Class V

28. Which hand piece sprays water?

a. contra-angle

b. slow-speed

c. high-speed

d. prophy angle

e. both b and c

29. What is the purpose of the water spray from a hand piece?

a. prohibiting the bur from overheating

b. adding moisture to the patient’s mouth

c. prohibiting the tooth from overheating

d. keeping the work area clean

e. both b and c

30. What is the function of the rheostat?

a. allows the hand piece to rotate

b. allows the hand piece to stop rotating

c. allows the patient to be in a supine position

d. changes the bur for the operator

e. both a and b

31. Which of the following is NOT a benefit of using the HVE?

a. keeps the area free from debris

b. retraction of tongue

c. allows light into the mouth

d. retraction of the soft tissues

e. eliminates the use of the rubber dam

32. Which of the following is not a hand-cutting instrument?

a. hoe

b. chisel

c. gingival margin trimmer

d. discoid-cleoid

e. hatchet

33. What is the use of a mouth mirror?

a. reflecting light and retracting the cheek

b. retracting the cheek and retracting the tongue

c. retracting the cheek, retracting the tongue, and indirect vision

d. indirect vision

e. all of the above

34. How should the patient be seated when taking an alginate impression of the maxillary arch?

a. supine position

b. subsupine position

c. upright position, with head tilted slightly forward

d. upright position, with head tilted back

e. slightly reclined with chin tilted downward

35. When assisting a Class III restoration, what type of matrix is used?

a. clear plastic strip

b. T-band

c. universal

d. Palodentt

e. both a and c

36. Which of the following statements is correct about at-home bleaching using a bleaching tray?

a. It is effective on extrinsic stains.

b. It is effective on intrinsic stains.

c. It is recommended for non-vital teeth.

d. It produces permanent results.

e. both a and b

37. On what part of a newly placed restoration or sealant will articulating paper leave colored marks?

a. indentations

b. high spots

c. overhangs

d. gingival third

e. buccal groove

38. What part of a Tofflemire matrix retainer tightens the band securely within the retainer?

a. inner knob

b. outer knob

c. spindle

d. channel guide

e. both a and c

39. What are the three parts of a bur?

a. shank, neck, head

b. shank, shaft, head

c. shaft, insert, head

d. shank, insert, neck

e. shaft, neck, head

40. In which styles are burs supplied?

a. carbide and metal

b. diamond and plastic

c. carbide and diamond

d. latch-type and friction grip

e. both c and d

41. What is an all-encompassing term for an abnormality in the oral cavity?

a. lesion

b. antigen

c. antibody

d. plaque

e. mucosa

42. What is the instrument called that is used to contour alveolar bone to eliminate sharp edges?

a. surgical scissors

b. bone files

c. rongeurs

d. chisel

e. elevator

43. What is alveolitis more commonly called?

a. excessive bleeding

b. pack the sockets

c. dry socket

d. impaction

e. periocoronitis

44. Where can pediatric patients with certain physical and mental disorders be treated?

a. at the hospital

b. in the pediatric office

c. at the home

d. both a and b

e. a, b, and c

45. If a patient has traumatic intrusion, what does this mean?

a. The tooth has been knocked out of the mouth completely.

b. The tooth has been forced inward.

c. The tooth has been luxated.

d. The tooth has been avulsed.

e. The tooth has been untouched.

46. What type of occlusion will tongue thrusting produce?

a. Class I

b. Class II

c. Class III

d. crossbite

e. overbite

47. What fast and effective instrument that sprays water to cool and flush an area can be used instead of manual hand scaling?

a. electrosurgery unit

b. ultrasonic scaler unit

c. surgical scalpel

d. universal curette

e. slow-speed hand piece with prophy-angle

48. While perio charting, the chairside assistant charts conditions involving the soft tissues as well as pocket readings. What class indicates moderate mobility?

a. Class I

b. Class II

c. Class III

d. Class IV

e. both a and b

49. When is endodontic treatment not suggested?

a. when diagnosis is reversible pulpitis

b. when a tooth has severe periodontal problems

c. when diagnosis is irreversible pulpitis

d. both a and b

e. a, b, and c

50. During endodontic treatment, with what are the canals irrigated?

a. glutaraldehyde

b. sterile saline solution

c. sodium hypochlorite

d. sodium bicarbonate

e. gutta percha

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