California RDA Law & Ethics Exam 2026 –
Complete Practice Questions & Verified
Answers (Latest Updated Study Guide)
California RDA Law & Ethics Exam 2026 – Complete Practice Questions &
Verified Answers
• This study guide contains 200 expertly curated multiple-choice questions covering
all key domains of the California RDA Law & Ethics Exam, each with five answer
options (A–E), a clearly highlighted correct answer, and a detailed EXPERT
RATIONALE to reinforce understanding.
• Use this material by reading each question carefully, selecting your answer before
checking the correct option, and studying the EXPERT RATIONALE to deepen your
grasp of California dental law, scope of practice, and ethical principles.
1. Which agency is responsible for regulating the practice of dentistry in
California?
A. California Department of Public Health
B. California Medical Board
C. American Dental Association
D. California Dental Hygiene Committee
E. California Dental Board (Dental Board of California)
Correct Answer: E. California Dental Board (Dental Board of California)
EXPERT RATIONALE: The Dental Board of California, under the Department of
Consumer Affairs, is the state agency responsible for licensing and regulating all
dental professionals, including RDAs, in California.
2. What does the abbreviation RDA stand for in California dental practice?
,A. Registered Dental Assistant
B. Registered Dental Assistant
A. Recognized Dental Aide
B. Registered Dental Associate
C. Registered Dental Assistant
D. Regulated Dental Auxiliary
E. Registered Dental Analyst
Correct Answer: C. Registered Dental Assistant
EXPERT RATIONALE: In California, RDA stands for Registered Dental Assistant, a
licensed dental auxiliary who has met specific education, examination, and
licensure requirements set by the Dental Board of California.
3. Under California law, who is ultimately responsible for all dental
procedures performed in a dental office?
A. The office manager
B. The dental assistant
C. The dental hygienist
D. The licensed dentist
E. The dental board inspector
Correct Answer: D. The licensed dentist
EXPERT RATIONALE: Under California Business and Professions Code, the
supervising licensed dentist bears ultimate legal and professional responsibility for
all dental procedures performed under their supervision in the dental practice.
4. Which of the following is an example of direct supervision?
,A. The dentist has examined the patient and is present in the office
B. The dentist is available by phone
C. The dentist is present in the office, has diagnosed the condition, and
observes the procedure
D. The dentist has given prior instructions in writing
E. The dentist reviews the work after completion
Correct Answer: C. The dentist is present in the office, has diagnosed the
condition, and observes the procedure
EXPERT RATIONALE: Direct supervision under California dental law requires the
dentist to be physically present, to have evaluated the patient, and to be observing
or immediately available to oversee the procedure being performed.
5. What level of supervision is required for an RDA to perform coronal
polishing?
A. No supervision required
B. General supervision
C. Direct supervision
D. Indirect supervision
E. Remote supervision
Correct Answer: C. Direct supervision
EXPERT RATIONALE: Coronal polishing by an RDA requires direct supervision in
California, meaning the dentist must be physically present in the office and must
have examined the patient prior to the procedure.
6. Which of the following tasks is OUTSIDE the scope of practice of a California
RDA?
, A. Taking dental radiographs
B. Placing rubber dams
C. Coronal polishing
D. Administering local anesthesia
E. Taking impressions for study models
Correct Answer: D. Administering local anesthesia
EXPERT RATIONALE: Administration of local anesthesia is not within the scope
of practice for a standard RDA in California. It is permitted only for an RDAEF
(Registered Dental Assistant in Extended Functions) under specific authorization
and training.
7. The California RDA license must be renewed every:
A. One year
B. Two years
C. Three years
D. Four years
E. Five years
Correct Answer: B. Two years
EXPERT RATIONALE: California RDA licenses are renewed on a biennial (every
two years) basis. Licensees must complete continuing education requirements and
pay the renewal fee to maintain an active license.
8. How many units of continuing education (CE) are required for RDA license
renewal in California?
A. 10 units
B. 15 units
Complete Practice Questions & Verified
Answers (Latest Updated Study Guide)
California RDA Law & Ethics Exam 2026 – Complete Practice Questions &
Verified Answers
• This study guide contains 200 expertly curated multiple-choice questions covering
all key domains of the California RDA Law & Ethics Exam, each with five answer
options (A–E), a clearly highlighted correct answer, and a detailed EXPERT
RATIONALE to reinforce understanding.
• Use this material by reading each question carefully, selecting your answer before
checking the correct option, and studying the EXPERT RATIONALE to deepen your
grasp of California dental law, scope of practice, and ethical principles.
1. Which agency is responsible for regulating the practice of dentistry in
California?
A. California Department of Public Health
B. California Medical Board
C. American Dental Association
D. California Dental Hygiene Committee
E. California Dental Board (Dental Board of California)
Correct Answer: E. California Dental Board (Dental Board of California)
EXPERT RATIONALE: The Dental Board of California, under the Department of
Consumer Affairs, is the state agency responsible for licensing and regulating all
dental professionals, including RDAs, in California.
2. What does the abbreviation RDA stand for in California dental practice?
,A. Registered Dental Assistant
B. Registered Dental Assistant
A. Recognized Dental Aide
B. Registered Dental Associate
C. Registered Dental Assistant
D. Regulated Dental Auxiliary
E. Registered Dental Analyst
Correct Answer: C. Registered Dental Assistant
EXPERT RATIONALE: In California, RDA stands for Registered Dental Assistant, a
licensed dental auxiliary who has met specific education, examination, and
licensure requirements set by the Dental Board of California.
3. Under California law, who is ultimately responsible for all dental
procedures performed in a dental office?
A. The office manager
B. The dental assistant
C. The dental hygienist
D. The licensed dentist
E. The dental board inspector
Correct Answer: D. The licensed dentist
EXPERT RATIONALE: Under California Business and Professions Code, the
supervising licensed dentist bears ultimate legal and professional responsibility for
all dental procedures performed under their supervision in the dental practice.
4. Which of the following is an example of direct supervision?
,A. The dentist has examined the patient and is present in the office
B. The dentist is available by phone
C. The dentist is present in the office, has diagnosed the condition, and
observes the procedure
D. The dentist has given prior instructions in writing
E. The dentist reviews the work after completion
Correct Answer: C. The dentist is present in the office, has diagnosed the
condition, and observes the procedure
EXPERT RATIONALE: Direct supervision under California dental law requires the
dentist to be physically present, to have evaluated the patient, and to be observing
or immediately available to oversee the procedure being performed.
5. What level of supervision is required for an RDA to perform coronal
polishing?
A. No supervision required
B. General supervision
C. Direct supervision
D. Indirect supervision
E. Remote supervision
Correct Answer: C. Direct supervision
EXPERT RATIONALE: Coronal polishing by an RDA requires direct supervision in
California, meaning the dentist must be physically present in the office and must
have examined the patient prior to the procedure.
6. Which of the following tasks is OUTSIDE the scope of practice of a California
RDA?
, A. Taking dental radiographs
B. Placing rubber dams
C. Coronal polishing
D. Administering local anesthesia
E. Taking impressions for study models
Correct Answer: D. Administering local anesthesia
EXPERT RATIONALE: Administration of local anesthesia is not within the scope
of practice for a standard RDA in California. It is permitted only for an RDAEF
(Registered Dental Assistant in Extended Functions) under specific authorization
and training.
7. The California RDA license must be renewed every:
A. One year
B. Two years
C. Three years
D. Four years
E. Five years
Correct Answer: B. Two years
EXPERT RATIONALE: California RDA licenses are renewed on a biennial (every
two years) basis. Licensees must complete continuing education requirements and
pay the renewal fee to maintain an active license.
8. How many units of continuing education (CE) are required for RDA license
renewal in California?
A. 10 units
B. 15 units
