DANB RHS practice test TB Questions
Correct Solutions Current Update
The amount of radiation and exposure time needed to produce a diagnostic radiograph
is best determined by - Answer- exposure time
How is scatter radiation reduced when taking an image? - Answer- use of a rectangular
cone
What step should be taken immediately if the tubehead drifts? - Answer- stop using the
machine
The radiation exposure that poses the greatest hazard to the operator is - Answer-
leakage radiation
The diameter of the cone-shaped beam produced from a circular collimator is - Answer-
2.75
To minimize potential infections from semicritical items, it is important the operator -
Answer- clean and disinfect devices after removal of surface barriers
Which organization regulates disinfectants and chemical sterilants? - Answer- EPA
When changing the 8-inch PID to a 16-inch PID, what is used to determine the intensity
of the beam? - Answer- inverse square law
Before exposing dental radiographs on a visually impaired patient, - Answer- use touch
and explain what the equipment does
What is the time between patient exposure to radiation and the appearance of biological
damage called? - Answer- latent period
What radiographic technique is recommended for a patient with a shallow palate? -
Answer- bisecting
An underexposed image will appear - Answer- light
If there are no teeth to serve as guides, which landmark indicates a maxillary molar area
radiograph? - Answer- tuberosity
After selecting the appropriate sensor size for the patient when taking a digital
radiograph, the next step is to - Answer- place a barrier on the sensor
What is the primary function of collimation? - Answer- restrict the size of the beam
, Which item best protects the dental team member from cross-contamination while
exposing radiographs - Answer- gloves
Why is it important for the patient to stand up straight when taking a panoramic image? -
Answer- to prevent the spine from being superimposed over the anterior teeth
The penetrating x-ray beam made during dental radiography is called - Answer- primary
radiation
Foreshortening of the maxillary radiographic image results from - Answer- increased
vertical angulation
The Frankfort Plane is an imaginary plane passing through the - Answer- external
auditory meatus to the floor of the orbit
Compared to a dentulous patient, radiographic exposure time on an edentulous adult
patient should - Answer- decrease
A panoramic radiograph with a dark shadow over the apices of the maxillary teeth may
be caused by the patient - Answer- not placing the tongue against the palate
ALARA is primarily concerned with the radiation that is - Answer- artificial
When taking a panoramic radiograph, the patient's head should be oriented - Answer-
with the midsagittal place perpendicular to the floor
Radiation injury can be measured by - Answer- dose rate
After a radiographic procedure, the PID should be - Answer- disinfected
What are common uses for a CBCT 3D image? - Answer- determining bone structure
and tooth orientation
The shorter the wavelength of electromagnetic radiation, the greater the - Answer-
energy
The maximum permissible dose (MPD) of ionizing radiation for occupational exposure is
- Answer- 5
If a patient does not remove earrings before a panoramic radiograph is exposed, the
image may have - Answer- ghost images
When taking an occlusal radiograph, the PSP packet should extend from the patient's
mouth by approximately - Answer- 1/8-1/4
Correct Solutions Current Update
The amount of radiation and exposure time needed to produce a diagnostic radiograph
is best determined by - Answer- exposure time
How is scatter radiation reduced when taking an image? - Answer- use of a rectangular
cone
What step should be taken immediately if the tubehead drifts? - Answer- stop using the
machine
The radiation exposure that poses the greatest hazard to the operator is - Answer-
leakage radiation
The diameter of the cone-shaped beam produced from a circular collimator is - Answer-
2.75
To minimize potential infections from semicritical items, it is important the operator -
Answer- clean and disinfect devices after removal of surface barriers
Which organization regulates disinfectants and chemical sterilants? - Answer- EPA
When changing the 8-inch PID to a 16-inch PID, what is used to determine the intensity
of the beam? - Answer- inverse square law
Before exposing dental radiographs on a visually impaired patient, - Answer- use touch
and explain what the equipment does
What is the time between patient exposure to radiation and the appearance of biological
damage called? - Answer- latent period
What radiographic technique is recommended for a patient with a shallow palate? -
Answer- bisecting
An underexposed image will appear - Answer- light
If there are no teeth to serve as guides, which landmark indicates a maxillary molar area
radiograph? - Answer- tuberosity
After selecting the appropriate sensor size for the patient when taking a digital
radiograph, the next step is to - Answer- place a barrier on the sensor
What is the primary function of collimation? - Answer- restrict the size of the beam
, Which item best protects the dental team member from cross-contamination while
exposing radiographs - Answer- gloves
Why is it important for the patient to stand up straight when taking a panoramic image? -
Answer- to prevent the spine from being superimposed over the anterior teeth
The penetrating x-ray beam made during dental radiography is called - Answer- primary
radiation
Foreshortening of the maxillary radiographic image results from - Answer- increased
vertical angulation
The Frankfort Plane is an imaginary plane passing through the - Answer- external
auditory meatus to the floor of the orbit
Compared to a dentulous patient, radiographic exposure time on an edentulous adult
patient should - Answer- decrease
A panoramic radiograph with a dark shadow over the apices of the maxillary teeth may
be caused by the patient - Answer- not placing the tongue against the palate
ALARA is primarily concerned with the radiation that is - Answer- artificial
When taking a panoramic radiograph, the patient's head should be oriented - Answer-
with the midsagittal place perpendicular to the floor
Radiation injury can be measured by - Answer- dose rate
After a radiographic procedure, the PID should be - Answer- disinfected
What are common uses for a CBCT 3D image? - Answer- determining bone structure
and tooth orientation
The shorter the wavelength of electromagnetic radiation, the greater the - Answer-
energy
The maximum permissible dose (MPD) of ionizing radiation for occupational exposure is
- Answer- 5
If a patient does not remove earrings before a panoramic radiograph is exposed, the
image may have - Answer- ghost images
When taking an occlusal radiograph, the PSP packet should extend from the patient's
mouth by approximately - Answer- 1/8-1/4
