RHS EXAM, PRACTICE EXAM AND STUDY GUIDE 2026 400 QUESTIONS AND

RHS EXAM, PRACTICE EXAM AND STUDY GUIDE 2026 400 QUESTIONS AND ( ANSWERS)

RHS EXAM, PRACTICE EXAM AND STUDY

GUIDE 2026 400

QUESTIONS AND CORRECT DETAILED

ANSWERS WITH RATIONALES (

ANSWERS)

When changing the 8-inch PID to a 16-inch PID, which of the

following is used to determine the intensity of the beam? -

ANSWER- Inverse square law

The optimum developing solution temperature for manual

processing is - ANSWER- 68 degrees F

Which of the following would cause elongation on a

radiograph? - ANSWER- Insufficient vertical angulation

Which of the following helps to decrease exposure of the thyroid

gland from the primary radiation beam? - ANSWER- Paralleling

technique

Using the ALARA concept as a guideline for radiographs

includes all of the following EXCEPT - ANSWER- Using a

circular PID

Which of the following best describes the action of the

developer solution? - ANSWER- Converts exposed silver halide

crystals

In dental radiography, the purpose of the fixer solution is to -

ANSWER- Remove unexposed silver halide crystals

What is the primary advantage in using digital radiography? -

ANSWER- Reduces the radiation to patient

On a radiograph, the anterior alveolar crest normally appears -

ANSWER- Pointed and sharp

Film should be stored in - ANSWER- Its original lead-wrapped

packaging

Which of the following is most likely to cause a stored

radiograph to turn brown over time? - ANSWER- Underwashing

Which of the following affects the speed of the electrons emitted

from the tubehead? - ANSWER- kVps

Radiation injury results from - ANSWER- Exposure

Dental healthcare personnel who are pregnant can expose

radiographs during the - ANSWER- Entire pregnancy

The diameter of the cone-shaped beam produced from a circular

collimator is - ANSWER- 2.75 inches

The penetrating x-ray beam produced during dental radiography

is called - ANSWER- Primary radiation

Developing solution temperatures should be checked frequently

when using - ANSWER- Manual processing

Which of the following landmarks would be seen in maxillary

anterior periapical - ANSWER- Incisive foramen

If there are no teeth to serve as guides, which of the following

landmarks indicates a maxillary molar area radiograph? -

ANSWER- Tuberosity

Human tissues are mainly composed of - ANSWERWater/H2O

The most important step the dentist can take in protecting

patients form x-radiation is to - ANSWER- Properly prescribe

radiographs

While exposing x-ray films, radiation deflecting off the patient's

head is called - ANSWER- Scatter radiation

Which of the following landmarks is useful when mounting

films in the maxillary central area? - ANSWER- Anterior nasal

spine

Which of the following can be observed on a panoramic

radiograph when the patient's chin is tipped downward? -

ANSWER- Exagge smile

When the tubehead drifts, the first step the dental assistant

should take is to - ANSWER- Stop using the machine

During the processing of x-ray film, the removal of the halide

portion of the exposed silver crystals is called - ANSWERReduction

The occlusal plane will appear diagonal in the radiograph when

there is a/an - ANSWER- Incorrect film placement