Efda study test Questions and Answers
100% Pass
A carver should be adapted at a __________ to the surface being carved.
A. 45 degree angle
B. 30 degree angle
C. 60 degree angle
D. 90 degree angle - ✔✔D. 90 degree angle
What is the function of the index finger in the modified pen grasp?
A. Rest lightly in the side of the instrument
B. Holds the instrument handle opposite the thumb
C. It has no function in the grasp
D. Rests on the incisal or occlusal surface during activation if the instrument - ✔✔B.
Holds the instrument handle opposite the thumb
How does the EFDA accomplish activation (movement) of an instrument in order to
avoid muscle cramping and fatigue?
A. Move the hand, wrist, and forearm as one unit
B. Moving the hand, wrist, and forearm as one unit, keeping a secure fulcrum
C. Flexing the fingers back and forth
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,D. Flexing the fingers back and forth, keeping a secure fulcrum - ✔✔B. Moving the
hand, wirst, and forearm as one unit , keeping a secure fulrcum
For best results of most operative procedures, it is important for he Efda to maintain
complete:
A. Retraction
B. Protection
C. Isolation
D. Contamination - ✔✔C. Isolation
What method of isolation is recommended for short periods of time and is the oldest
method used for moisture control?
A. Cotton roll
B. Dri angles
C. Rubber dam
D. High speed evacuation - ✔✔A. Cotton rolls
From the statements listed below, which statement is NOT a disadvantage of using
cotton roll isolation?
A. They become saturated easily
B. They protect against aspiration
C. They offer limited retraction if lips and cheeks
D. They need changed frequently - ✔✔B. They protect against aspiration
What form of isolation is considered ideal in operative procedures?
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 2
,A. Cotton roll
B. Dri angles
C. Rubber dam
D. High speed evacuation - ✔✔C. Rubber dam
An EFDA is attempting to isolate an operating field in the oral cavity. Which method
listed below is considered ideal?
A. Gauze squares
B. Dri angles
C. Cotton rolls
D. Rubber dam - ✔✔D. Rubber dam
What is a disadvantage of rubber dam isolation?
A. Time consuming
B. Limited retraction if lips and cheeks
C. Limited protection against aspiration
D. Limited protection of the patient and operator - ✔✔A. Time consuming
When applying the dental dam for complete isolation of teeth, the Efda will need to
________ the dam.
A. Ligate
B. Contour
C. Dry
D. Invert - ✔✔D. Invert
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 3
, In removing the dental dam, the septum portion of the dam is:
A. Burnished
B. Cut
C. Ligated
D. Lubricated - ✔✔B. Cut
Tooth #20 (universal number) is to be restored. Name the teeth to be isolated with a
rubber dam.
A. #19 through #22
B. #18 through #21
C. #18 through #22
D. #19 through #21 - ✔✔A. #19 through #22
Before trying a clamp on a tooth, it is necessary to:
A. Disinfect the tooth
B. Measure the tooth
C. Tie a ligature (attach floss) in the clamp
D. Place the dental dam - ✔✔C. Tie a ligature (attach floss) on the clamp
What is the function of the jaw of a rubber dam clamp?
A. Holes on the clamp for the forceps
B. Part of the clamp which are expanded to fit over the tooth
C. Parts which contact the tooth
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 4
100% Pass
A carver should be adapted at a __________ to the surface being carved.
A. 45 degree angle
B. 30 degree angle
C. 60 degree angle
D. 90 degree angle - ✔✔D. 90 degree angle
What is the function of the index finger in the modified pen grasp?
A. Rest lightly in the side of the instrument
B. Holds the instrument handle opposite the thumb
C. It has no function in the grasp
D. Rests on the incisal or occlusal surface during activation if the instrument - ✔✔B.
Holds the instrument handle opposite the thumb
How does the EFDA accomplish activation (movement) of an instrument in order to
avoid muscle cramping and fatigue?
A. Move the hand, wrist, and forearm as one unit
B. Moving the hand, wrist, and forearm as one unit, keeping a secure fulcrum
C. Flexing the fingers back and forth
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
,D. Flexing the fingers back and forth, keeping a secure fulcrum - ✔✔B. Moving the
hand, wirst, and forearm as one unit , keeping a secure fulrcum
For best results of most operative procedures, it is important for he Efda to maintain
complete:
A. Retraction
B. Protection
C. Isolation
D. Contamination - ✔✔C. Isolation
What method of isolation is recommended for short periods of time and is the oldest
method used for moisture control?
A. Cotton roll
B. Dri angles
C. Rubber dam
D. High speed evacuation - ✔✔A. Cotton rolls
From the statements listed below, which statement is NOT a disadvantage of using
cotton roll isolation?
A. They become saturated easily
B. They protect against aspiration
C. They offer limited retraction if lips and cheeks
D. They need changed frequently - ✔✔B. They protect against aspiration
What form of isolation is considered ideal in operative procedures?
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 2
,A. Cotton roll
B. Dri angles
C. Rubber dam
D. High speed evacuation - ✔✔C. Rubber dam
An EFDA is attempting to isolate an operating field in the oral cavity. Which method
listed below is considered ideal?
A. Gauze squares
B. Dri angles
C. Cotton rolls
D. Rubber dam - ✔✔D. Rubber dam
What is a disadvantage of rubber dam isolation?
A. Time consuming
B. Limited retraction if lips and cheeks
C. Limited protection against aspiration
D. Limited protection of the patient and operator - ✔✔A. Time consuming
When applying the dental dam for complete isolation of teeth, the Efda will need to
________ the dam.
A. Ligate
B. Contour
C. Dry
D. Invert - ✔✔D. Invert
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 3
, In removing the dental dam, the septum portion of the dam is:
A. Burnished
B. Cut
C. Ligated
D. Lubricated - ✔✔B. Cut
Tooth #20 (universal number) is to be restored. Name the teeth to be isolated with a
rubber dam.
A. #19 through #22
B. #18 through #21
C. #18 through #22
D. #19 through #21 - ✔✔A. #19 through #22
Before trying a clamp on a tooth, it is necessary to:
A. Disinfect the tooth
B. Measure the tooth
C. Tie a ligature (attach floss) in the clamp
D. Place the dental dam - ✔✔C. Tie a ligature (attach floss) on the clamp
What is the function of the jaw of a rubber dam clamp?
A. Holes on the clamp for the forceps
B. Part of the clamp which are expanded to fit over the tooth
C. Parts which contact the tooth
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 4
