1
California RDA written exam Questions with Answers
(100% Correct Answers)
according to the CDC which infection control measure is considered
the most critical for reducing the transmission of microbes in the health
care setting? Answer: hand washing
in a dental setting the clinical supply refrigerator may be used for the
preservation of Answer: bonding materials
A used dental anesthetic needle is an example of Answer: regulated
waste
Employees must receive training regarding hazardous chemicals at
which interval? Answer: upon hire and whenever a new hazard is
introduced
The OSHA Hazard Communication Standard is based on the premise
that an employee has the right to know about Answer: chemicals in the
office
Which set of precautions is intended to prevent exposure to all body
fluids? Answer: Standard
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,2
The majority of the spray produced by dental hand pieces consists of
Answer: saliva
which of the following viral infections can be prevented through
immunization? Answer: Hepatitis B
According to the Occupational Safety and Health Administration
(OSHAP), a bloodborne pathogens training program should include a
general explanation of Answer: the modes of disease transmission
Routine hand washing removes Answer: most of the transient microbes
and some of the resident microbes
Which of the following greatly reduces or eliminates biofilm in the
dental unit water system? Answer: properly using chemical treatments
which of the following modes of disease transmission best describes a
human bite? Answer: parenteral
the primary reason a surgical face mask must be used during a dental
procedure is to Answer: protect the DHCP from exposure to spatter
Instrument cassettes should be wrapped Answer: after cleaning and
before sterilization
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,3
Used radiograph fixer solution is usually considered Answer: hazardous
waste
Which party is responsible for ensuring a Material Safety Data Sheet is
available in the work place for each hazardous material? Answer:
Employer
Which of the following statements most accurately defines engineering
controls? Answer: Materials and devices that prevent employees
exposure to hazardous or infectious substances
When using the air water syringe during dental treatment which of the
following personal protective equipment are recommended by the
CDC? Answer: gloves, mask, gown, and eye protection
According to the Center for Disease Control and Prevention, patient-
care items that penetrate soft tissue are categorized as Answer: critical
The purpose of a holding solution is to Answer: prevent hardening of
debris and body fluids on instruments
Which barrier should be removed before temporarily leaving a patient
to retrieve supplies? Answer: gloves
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, 4
The majority of organisms that make up dental unit waterline biofilm
consists of Answer: water bacteria
Material Safety Data Sheet (MSDS) are required by OSHA'S Answer:
Hazardous Communication Standard
Besides alcohol, which of the following is a common antimicrobial
agent found in hand hygiene products? Answer: Chlorohexidine
The accessibility of the exposure control plan for employees is the
responsibility of the Answer: employer
High- level disinfectants should be used Answer: according to the
manufacturer's directions
Exposure of dental heathcare personnel to nitrous oxide gases can be
reduced by Answer: using a scavenger system on the nitrous oxide
equipment
When putting on personal protective equipment, which barrier should
be put on last, just before patient care begins? Answer: gloves
© 2025 All rights reserved
California RDA written exam Questions with Answers
(100% Correct Answers)
according to the CDC which infection control measure is considered
the most critical for reducing the transmission of microbes in the health
care setting? Answer: hand washing
in a dental setting the clinical supply refrigerator may be used for the
preservation of Answer: bonding materials
A used dental anesthetic needle is an example of Answer: regulated
waste
Employees must receive training regarding hazardous chemicals at
which interval? Answer: upon hire and whenever a new hazard is
introduced
The OSHA Hazard Communication Standard is based on the premise
that an employee has the right to know about Answer: chemicals in the
office
Which set of precautions is intended to prevent exposure to all body
fluids? Answer: Standard
© 2025 All rights reserved
,2
The majority of the spray produced by dental hand pieces consists of
Answer: saliva
which of the following viral infections can be prevented through
immunization? Answer: Hepatitis B
According to the Occupational Safety and Health Administration
(OSHAP), a bloodborne pathogens training program should include a
general explanation of Answer: the modes of disease transmission
Routine hand washing removes Answer: most of the transient microbes
and some of the resident microbes
Which of the following greatly reduces or eliminates biofilm in the
dental unit water system? Answer: properly using chemical treatments
which of the following modes of disease transmission best describes a
human bite? Answer: parenteral
the primary reason a surgical face mask must be used during a dental
procedure is to Answer: protect the DHCP from exposure to spatter
Instrument cassettes should be wrapped Answer: after cleaning and
before sterilization
© 2025 All rights reserved
,3
Used radiograph fixer solution is usually considered Answer: hazardous
waste
Which party is responsible for ensuring a Material Safety Data Sheet is
available in the work place for each hazardous material? Answer:
Employer
Which of the following statements most accurately defines engineering
controls? Answer: Materials and devices that prevent employees
exposure to hazardous or infectious substances
When using the air water syringe during dental treatment which of the
following personal protective equipment are recommended by the
CDC? Answer: gloves, mask, gown, and eye protection
According to the Center for Disease Control and Prevention, patient-
care items that penetrate soft tissue are categorized as Answer: critical
The purpose of a holding solution is to Answer: prevent hardening of
debris and body fluids on instruments
Which barrier should be removed before temporarily leaving a patient
to retrieve supplies? Answer: gloves
© 2025 All rights reserved
, 4
The majority of organisms that make up dental unit waterline biofilm
consists of Answer: water bacteria
Material Safety Data Sheet (MSDS) are required by OSHA'S Answer:
Hazardous Communication Standard
Besides alcohol, which of the following is a common antimicrobial
agent found in hand hygiene products? Answer: Chlorohexidine
The accessibility of the exposure control plan for employees is the
responsibility of the Answer: employer
High- level disinfectants should be used Answer: according to the
manufacturer's directions
Exposure of dental heathcare personnel to nitrous oxide gases can be
reduced by Answer: using a scavenger system on the nitrous oxide
equipment
When putting on personal protective equipment, which barrier should
be put on last, just before patient care begins? Answer: gloves
© 2025 All rights reserved
