Question 1

A step wedge is a device of layered metal steps of varying thickness used to:

Accepted Answer

A step wedge is primarily used to test the strength of processing chemicals in radiography. It helps in evaluating whether the chemicals are properly developing the film by observing the differences in film density across the steps, which correspond to varying thicknesses.

Question 2

Which of these statements is FALSE?

Accepted Answer

Intensifying screens should not be cleaned daily; they should be cleaned periodically as recommended by the manufacturer to avoid damage.

Question 3

The expiration date manufacturers place on radiograph film boxes indicates that films:

Accepted Answer

The expiration date on radiograph film boxes indicates that films should not be used for patient exposures after this date. This is because the film's sensitivity to radiation decreases over time, leading to underexposure, decreased image quality, or inconsistent results. Therefore, it is necessary to dispose of expired films and use only those that are within their expiration date to avoid compromising patients' diagnostic imaging.

Question 4

Each of the following conditions is necessary for safelighting EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

Black darkroom walls are not necessary for safelighting. In fact, it is recommended to have white or light colored walls to reduce the risk of color contamination in the prints. Adequate bulb wattage, appropriate filter color, and a safe distance from the working area are all necessary for safelighting.

Question 5

Which of these statements regarding the competency operators is FALSE?

Accepted Answer

Competency operators are not responsible for prescribing dental radiographs; this is typically the responsibility of a licensed dentist.

Question 6

Each of the following statements regarding the coin test is correct EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

The correct procedure for the coin test is to place the coin on top of the film in the darkroom for a few minutes and then remove it before exposing the film to the safelight. Option C states that the coin is left on the unwrapped film for 10 minutes, which is inaccurate.

Question 7

Each of the following statements regarding quality assurance of the automatic processor is correct EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

Maintenance procedures and tests need to be performed more frequently than annually under normal conditions to ensure the proper functioning of the automatic processor.

Question 8

In automatic processing, the most likely cause of damp films is that:

Accepted Answer

The most likely cause of damp films in automatic processing is that the dryer was not operating correctly. If the dryer is malfunctioning or not set to the appropriate temperature, films will not be adequately dried after processing.

Question 9

Each of the following statements regarding testing for darkroom light leaks is correct EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

White-light leaks may not always be immediately visible when the lights in the darkroom are turned off. It may take several minutes for the eyes to adjust to complete darkness before any leaks become visible.

Question 10

In most locations, a qualified health physicist must perform x-ray machine testing according to state and local regulations.

Accepted Answer

State and local regulations may require that x-ray machine testing be performed by a qualified health physicist in order to ensure safety and compliance with applicable standards.

Question 11

Radiographic competencies of the dental assistant and dental hygienist include each of the following EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

While dental assistants and dental hygienists are responsible for recognizing and identifying quality radiographs, identifying the cause of poor-quality radiographs, and applying appropriate corrective actions to failed quality control tests, completing necessary state documentation of safe operating equipment is typically the responsibility of the dentist or licensed radiologic technologist.

Question 12

Which of the following indicates a passed coin test?

Accepted Answer

A passed coin test in radiography means there is no image of the coin on the radiograph, indicating proper penetration of the X-rays through the object being tested.

Question 13

Monitoring the strength of the manual processing solutions should be performed:

Accepted Answer

The strength of manual processing solutions should be monitored daily to ensure the quality and accuracy of the outputs. This allows for any issues or errors to be identified and addressed promptly, minimizing any potential negative impacts on business operations. Waiting longer periods of time such as weekly, monthly, or quarterly may lead to larger and more difficult problems to resolve.

Question 14

The dental radiographer can play a role in monitoring the x-ray machine.

Accepted Answer

The dental radiographer is responsible for ensuring that the x-ray machine is functioning properly and producing high-quality images while minimizing the patient's radiation exposure. Therefore, they may monitor the x-ray machine regularly and perform quality control tests, such as checking the exposure time and film processing, to ensure that the machine is functioning correctly.

Question 15

Each of the following is a quality control measure EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

While the other options pertain to quality control measures within the dental office, patient compliance determination involves ensuring that patients are following recommended oral hygiene practices outside of the office. It is important for overall dental health, but is not a direct quality control measure within the office.

Question 16

Continuing education courses contribute to radiographic competence. Competent radiographers are key to quality assurance programs and reducing patient radiation exposure by avoiding retakes.

Accepted Answer

The first statement is true. Continuing education courses help radiographers stay up-to-date on new technology and techniques, which can contribute to their competence. The second statement is also true. Competent radiographers are essential to quality assurance programs and reducing patient radiation exposure because they are able to produce high-quality images on the first attempt, reducing the need for retakes and therefore reducing the patient's overall radiation exposure.

Question 17

Which of the following statements regarding processing solutions is correct?

Accepted Answer

A dental radiographic normalizing and monitoring device is used to monitor the performance of the X-ray unit, not the developer.

Answer: B
 When the developer solution oxidizes and deteriorates, the radiographic images become lighter, not darker.

Answer: C
 The fixer is important for removing unexposed silver halide crystals from the film and preventing further darkening of the image, but the developer is actually more critical in terms of image quality.

Answer: D
 The step wedge should be used to monitor the developer at regular intervals throughout the day, not just at the end of the day.

Question 18

A qualified health physicist should examine the equipment for which of the following failed tests?

Accepted Answer

Radiation output consistency is directly related to the equipment's ability to produce consistent and safe levels of radiation, which is crucial for both patient safety and the quality of diagnostic images. A qualified health physicist is needed to assess and ensure the equipment is functioning within safe radiation levels.

Question 19

Which of the following statements regarding dental x-ray machine output consistency testing is correct?

Accepted Answer

Dental x-ray machine output consistency testing uses a step wedge to evaluate the radiation output consistency. Multiple images that are identical in density and contrast indicate that the machine is not functioning properly. Each test film should be processed immediately after exposure, but it can be performed by a trained dental assistant under the supervision of a dentist.

Question 20

Each of the following applies to all oral health care team members EXCEPT one. Which one is the EXCEPTION?

Accepted Answer

While all other choices apply to all oral health care team members, participation in state inspections may not be applicable to all team members depending on their role in the practice or clinic.

Quiz 19: Quality Control and Environmental Safety in Dental Radiography