California RDA
California RDA Written Exam Study Guide
Questions and Answers Graded A+ 2025-2026
according to the CDC which infection control measure is considered the most critical for
reducing the transmission of microbes in the health care setting? -Correct Answer
✔hand washing
in a dental setting the clinical supply refrigerator may be used for the preservation of -
Correct Answer ✔bonding materials
A used dental anesthetic needle is an example of -Correct Answer ✔regulated waste
Employees must receive training regarding hazardous chemicals at which interval? -
Correct 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 -Correct Answer ✔chemicals in the office
Which set of precautions is intended to prevent exposure to all body fluids? -Correct
Answer ✔Standard
The majority of the spray produced by dental hand pieces consists of -Correct Answer
✔saliva
which of the following viral infections can be prevented through immunization? -Correct
Answer ✔Hepatitis B
According to the Occupational Safety and Health Administration (OSHAP), a
bloodborne pathogens training program should include a general explanation of -
Correct Answer ✔the modes of disease transmission
Routine hand washing removes -Correct 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? -Correct Answer ✔properly using chemical treatments
which of the following modes of disease transmission best describes a human bite? -
Correct Answer ✔parenteral
California RDA
,California RDA
the primary reason a surgical face mask must be used during a dental procedure is to -
Correct Answer ✔protect the DHCP from exposure to spatter
Instrument cassettes should be wrapped -Correct Answer ✔after cleaning and before
sterilization
Used radiograph fixer solution is usually considered -Correct Answer ✔hazardous waste
Which party is responsible for ensuring a Material Safety Data Sheet is available in the
work place for each hazardous material? -Correct Answer ✔Employer
Which of the following statements most accurately defines engineering controls? -
Correct 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? -Correct 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 -Correct Answer ✔critical
The purpose of a holding solution is to -Correct Answer ✔prevent hardening of debris
and body fluids on instruments
Which barrier should be removed before temporarily leaving a patient to retrieve
supplies? -Correct Answer ✔gloves
The majority of organisms that make up dental unit waterline biofilm consists of -Correct
Answer ✔water bacteria
Material Safety Data Sheet (MSDS) are required by OSHA'S -Correct Answer
✔Hazardous Communication Standard
Besides alcohol, which of the following is a common antimicrobial agent found in hand
hygiene products? -Correct Answer ✔Chlorohexidine
The accessibility of the exposure control plan for employees is the responsibility of the -
Correct Answer ✔employer
High- level disinfectants should be used -Correct Answer ✔according to the
manufacturer's directions
California RDA
, California RDA
Exposure of dental heathcare personnel to nitrous oxide gases can be reduced by -
Correct 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? -Correct Answer ✔gloves
To prepare for sterilization, the high-speed hand piece and reusable air-water syringe
tip should be flushed with water -Correct Answer ✔after each patient
Who is responsible for the evaluation of hazardous chemicals? -Correct Answer
✔chemicals manufacturers and importers
During normal use, which of the following is the most likely hazard for a dentist using a
curing light? -Correct Answer ✔eye exposure to the light
An exposure plan must be updated -Correct Answer ✔annually and when new or
modified tasks are introduced
Wearing a punctured gloves during patient care may result in which type of microbial
contact? -Correct Answer ✔direct
Work practice controls include the use of a -Correct Answer ✔one-handed recapping
technique
Heat sterilization of extracted teeth may result in -Correct Answer ✔the vaporization of
mercury, presenting a health hazard.
A person with a latent tuberculosis infection will -Correct Answer ✔have a positive skin
test and no symptoms of active tuberculosis
Which is the minimum temperature a steam sterilizer should reach to achieve
sterilization? -Correct Answer ✔121 degrees C
Which of the following is an example of a clinical contract surface? -Correct Answer
✔countertops
which of the following is recommended to minimize the occupational exposure to
atmospheric nitrous oxide? -Correct Answer ✔use a properly fitted nasal patient mask
who is responsible for appropriate regulated waste disposal? -Correct Answer ✔the
generation facility
California RDA
California RDA Written Exam Study Guide
Questions and Answers Graded A+ 2025-2026
according to the CDC which infection control measure is considered the most critical for
reducing the transmission of microbes in the health care setting? -Correct Answer
✔hand washing
in a dental setting the clinical supply refrigerator may be used for the preservation of -
Correct Answer ✔bonding materials
A used dental anesthetic needle is an example of -Correct Answer ✔regulated waste
Employees must receive training regarding hazardous chemicals at which interval? -
Correct 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 -Correct Answer ✔chemicals in the office
Which set of precautions is intended to prevent exposure to all body fluids? -Correct
Answer ✔Standard
The majority of the spray produced by dental hand pieces consists of -Correct Answer
✔saliva
which of the following viral infections can be prevented through immunization? -Correct
Answer ✔Hepatitis B
According to the Occupational Safety and Health Administration (OSHAP), a
bloodborne pathogens training program should include a general explanation of -
Correct Answer ✔the modes of disease transmission
Routine hand washing removes -Correct 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? -Correct Answer ✔properly using chemical treatments
which of the following modes of disease transmission best describes a human bite? -
Correct Answer ✔parenteral
California RDA
,California RDA
the primary reason a surgical face mask must be used during a dental procedure is to -
Correct Answer ✔protect the DHCP from exposure to spatter
Instrument cassettes should be wrapped -Correct Answer ✔after cleaning and before
sterilization
Used radiograph fixer solution is usually considered -Correct Answer ✔hazardous waste
Which party is responsible for ensuring a Material Safety Data Sheet is available in the
work place for each hazardous material? -Correct Answer ✔Employer
Which of the following statements most accurately defines engineering controls? -
Correct 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? -Correct 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 -Correct Answer ✔critical
The purpose of a holding solution is to -Correct Answer ✔prevent hardening of debris
and body fluids on instruments
Which barrier should be removed before temporarily leaving a patient to retrieve
supplies? -Correct Answer ✔gloves
The majority of organisms that make up dental unit waterline biofilm consists of -Correct
Answer ✔water bacteria
Material Safety Data Sheet (MSDS) are required by OSHA'S -Correct Answer
✔Hazardous Communication Standard
Besides alcohol, which of the following is a common antimicrobial agent found in hand
hygiene products? -Correct Answer ✔Chlorohexidine
The accessibility of the exposure control plan for employees is the responsibility of the -
Correct Answer ✔employer
High- level disinfectants should be used -Correct Answer ✔according to the
manufacturer's directions
California RDA
, California RDA
Exposure of dental heathcare personnel to nitrous oxide gases can be reduced by -
Correct 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? -Correct Answer ✔gloves
To prepare for sterilization, the high-speed hand piece and reusable air-water syringe
tip should be flushed with water -Correct Answer ✔after each patient
Who is responsible for the evaluation of hazardous chemicals? -Correct Answer
✔chemicals manufacturers and importers
During normal use, which of the following is the most likely hazard for a dentist using a
curing light? -Correct Answer ✔eye exposure to the light
An exposure plan must be updated -Correct Answer ✔annually and when new or
modified tasks are introduced
Wearing a punctured gloves during patient care may result in which type of microbial
contact? -Correct Answer ✔direct
Work practice controls include the use of a -Correct Answer ✔one-handed recapping
technique
Heat sterilization of extracted teeth may result in -Correct Answer ✔the vaporization of
mercury, presenting a health hazard.
A person with a latent tuberculosis infection will -Correct Answer ✔have a positive skin
test and no symptoms of active tuberculosis
Which is the minimum temperature a steam sterilizer should reach to achieve
sterilization? -Correct Answer ✔121 degrees C
Which of the following is an example of a clinical contract surface? -Correct Answer
✔countertops
which of the following is recommended to minimize the occupational exposure to
atmospheric nitrous oxide? -Correct Answer ✔use a properly fitted nasal patient mask
who is responsible for appropriate regulated waste disposal? -Correct Answer ✔the
generation facility
California RDA
