RHS EXAM, PRACTICE EXAM AND STUDY GUIDE
LATEST 2025-2026 ACTUAL EXAM 230 QUESTIONS
AND CORRECT DETAILED (VERIFIED ANSWERS)
|ALREADY GRADED A+
✅ Key Features
• 230 real exam-based questions with verified correct answers.
• Detailed rationales/explanations provided for every answer.
• Newest 2025–2026 edition, fully aligned with RHS exam updates.
• Verified accuracy and graded A+ quality.
• Comprehensive coverage of horticulture principles, plant identification,
maintenance, pest management, and safety protocols.
🎯 Who This Resource Is For
• Candidates preparing for the RHS Exam.
• Learners aiming to strengthen technical knowledge and horticultural skills.
• Educators and mentors seeking a reliable test prep resource.
• Candidates working toward exam confidence, accuracy, and certification success.
After the completion of a radiographic procedure, the PID should be - answer-disinfected
According to the inverse square law, when changing the PID length from 8 to 16 inches, the beam's
intensity is - answer-1/4 as intense
Which of the following increases the density on duplicated film? - answer-decrease the exposure time
Dilaceration in a radiographic image indicates the - answer-root shape is abnormally bent or curved
Dental healthcare personnel who are pregnant can expose radiographs during the
second trimester. first trimester. third trimester.
entire pregnancy. - answer-entire pregnancy
,A full mouth series of periapical radiographs taken on an edentulous patient will consist of - answer-six
anterior and eight posteriors
Developing solution temperatures should be checked frequently when using - answer-manual
processing
The purpose of a grid device on an extraoral cassette is to guide
x-rays to the appropriate tissue.
reduce scatter radiation reaching the film. reduce
patient exposure to radiation. guide x-rays to the
film. - answer-reduce scatter radiation reaching
the film
During film processing, which of the following can cause a dark image?
Developer solution that is cold
Overdeveloped film
Underdeveloped film
Developer solution that is weak - answer-overdeveloped film
Which of the following will best protect the dental assistant from cross-contamination while exposing
radiographs?
Patient bib
Film holding devices
Gloves
Barriers on PID - answer-gloves
How often should step wedge quality control tests for a dental x-ray machine be conducted? Daily
Monthly
Annually
,Weekly - answer-daily
Which of the following would you adjust to produce wavelengths with the greatest penetrating power?
Distance kVp Time mA - answer-kVP
Before exposing radiographs on a minor, the dental assistant should obtain
consent from parent or legal guardian.
explain radiographs are required by insurance. obtain
consent from the patient.
explain radiographs are mandatory for all patients. - answer-obtain consent from parent or legal
guardian
When transporting a disposable cup containing patients exposed film to the development area, the
dental assistant should carry the container with a gloved hand. place the container into his or her
lab coat pocket.
place the container on the instrument tray.
carry the container with an ungloved hand. - answer-carry the container with an ungloved hand
Blurred radiographic images are often caused by
failure to remove dental appliances. patient
movement during exposure. improper
positioning of the x-ray tube head.
overlapping bitewing. - answer-patient movement during exposure
A panoramic radiograph with a dark shadow over the apices of the maxillary teeth may be caused by the
patient not appropriately positioned in the focal trough.
placing the tongue against the palate not
biting on the bite block correctly.
not placing the tongue against the palate. - answer-not placing the tongue against the palate
, The time between patient exposure to radiation and the appearance of biological damage is the
waiting period. silent period.
refractory period.
latent period. - answer-latent period
Which of the following landmarks is useful when mounting films of the mandibular posterior area?
Mental foramen
Internal oblique ridge
Lingual foramen
External oblique ridge - answer-mental foramen
According to the CDC, how are the transmission of pathogens minimized when using phosphor sensors
to capture radiographic images?
By placing a plastic barrier over the sensor
By using a high-level disinfectant on the sensor
By chemically sterilizing the sensor
By heat sterilizing the sensor - answer-by placing a plastic barrier over the sensor
Dental assistants exposing x-rays can best be protected from scatter radiation by
standing behind a lead barrier. standing 2 feet away from the tubehead. wearing
a film badge.
wearing a lead apron. - answer-standing behind a lead barrier
The position-indicating device (PID) shape that most effectively reduces patient exposure to radiation is
conical.
rectangular.
oblong.
round. - answer-rectangular
LATEST 2025-2026 ACTUAL EXAM 230 QUESTIONS
AND CORRECT DETAILED (VERIFIED ANSWERS)
|ALREADY GRADED A+
✅ Key Features
• 230 real exam-based questions with verified correct answers.
• Detailed rationales/explanations provided for every answer.
• Newest 2025–2026 edition, fully aligned with RHS exam updates.
• Verified accuracy and graded A+ quality.
• Comprehensive coverage of horticulture principles, plant identification,
maintenance, pest management, and safety protocols.
🎯 Who This Resource Is For
• Candidates preparing for the RHS Exam.
• Learners aiming to strengthen technical knowledge and horticultural skills.
• Educators and mentors seeking a reliable test prep resource.
• Candidates working toward exam confidence, accuracy, and certification success.
After the completion of a radiographic procedure, the PID should be - answer-disinfected
According to the inverse square law, when changing the PID length from 8 to 16 inches, the beam's
intensity is - answer-1/4 as intense
Which of the following increases the density on duplicated film? - answer-decrease the exposure time
Dilaceration in a radiographic image indicates the - answer-root shape is abnormally bent or curved
Dental healthcare personnel who are pregnant can expose radiographs during the
second trimester. first trimester. third trimester.
entire pregnancy. - answer-entire pregnancy
,A full mouth series of periapical radiographs taken on an edentulous patient will consist of - answer-six
anterior and eight posteriors
Developing solution temperatures should be checked frequently when using - answer-manual
processing
The purpose of a grid device on an extraoral cassette is to guide
x-rays to the appropriate tissue.
reduce scatter radiation reaching the film. reduce
patient exposure to radiation. guide x-rays to the
film. - answer-reduce scatter radiation reaching
the film
During film processing, which of the following can cause a dark image?
Developer solution that is cold
Overdeveloped film
Underdeveloped film
Developer solution that is weak - answer-overdeveloped film
Which of the following will best protect the dental assistant from cross-contamination while exposing
radiographs?
Patient bib
Film holding devices
Gloves
Barriers on PID - answer-gloves
How often should step wedge quality control tests for a dental x-ray machine be conducted? Daily
Monthly
Annually
,Weekly - answer-daily
Which of the following would you adjust to produce wavelengths with the greatest penetrating power?
Distance kVp Time mA - answer-kVP
Before exposing radiographs on a minor, the dental assistant should obtain
consent from parent or legal guardian.
explain radiographs are required by insurance. obtain
consent from the patient.
explain radiographs are mandatory for all patients. - answer-obtain consent from parent or legal
guardian
When transporting a disposable cup containing patients exposed film to the development area, the
dental assistant should carry the container with a gloved hand. place the container into his or her
lab coat pocket.
place the container on the instrument tray.
carry the container with an ungloved hand. - answer-carry the container with an ungloved hand
Blurred radiographic images are often caused by
failure to remove dental appliances. patient
movement during exposure. improper
positioning of the x-ray tube head.
overlapping bitewing. - answer-patient movement during exposure
A panoramic radiograph with a dark shadow over the apices of the maxillary teeth may be caused by the
patient not appropriately positioned in the focal trough.
placing the tongue against the palate not
biting on the bite block correctly.
not placing the tongue against the palate. - answer-not placing the tongue against the palate
, The time between patient exposure to radiation and the appearance of biological damage is the
waiting period. silent period.
refractory period.
latent period. - answer-latent period
Which of the following landmarks is useful when mounting films of the mandibular posterior area?
Mental foramen
Internal oblique ridge
Lingual foramen
External oblique ridge - answer-mental foramen
According to the CDC, how are the transmission of pathogens minimized when using phosphor sensors
to capture radiographic images?
By placing a plastic barrier over the sensor
By using a high-level disinfectant on the sensor
By chemically sterilizing the sensor
By heat sterilizing the sensor - answer-by placing a plastic barrier over the sensor
Dental assistants exposing x-rays can best be protected from scatter radiation by
standing behind a lead barrier. standing 2 feet away from the tubehead. wearing
a film badge.
wearing a lead apron. - answer-standing behind a lead barrier
The position-indicating device (PID) shape that most effectively reduces patient exposure to radiation is
conical.
rectangular.
oblong.
round. - answer-rectangular
