Which scientist first discovered X-Rays?
Wilhelm Konrad Roentgen
Doctor H. G. Gama
Doctor Otto Proton
Raymond Cathode
What is the name of the tube that was discovered in 1895?
Crooke's tube
Roentgen’s tube
Walkoff tube
Evacuating tube
Which of the following is NOT a characteristic property of X-Rays?
They travel in straight lines
They travel at the speed of sound
They cause irritation to living cells
They cause certain substances to fluoresce
The rule that applies to the principle of radiation safety is:
ALARA
SAMS
CORPS
SAFETY
When taking radiographs, always drape the patient with a lead apron.
The time setting on the X-Ray machine is measured by using which of the following methods?
Minutes or impulses
Minutes or milliamperes
Fractions of a second or milliamperes
Fractions of a second or impulses
Which of the following instruction is most important when ordering radiographs for female patients?
Have the patient remove her eyeglasses
Have the patient remove her earrings
Ask the patient is she has any type of denture
Ask the patient if she is pregnant
The film badge should be placed behind the lead-lined barrier at least what number of feet from the tube head?
10
6
8
4
Which of the following is NOT a safety precaution for taking radiographs?
Always stand behind a lead screen during an exposure
Never stand in the path of the central X-Ray beam during exposure
Never hold the tube head or the tube head cylinder of the X-Ray machine during exposure
Hold the film packet in the patient’s mouth during exposure if necessary
Which of the following personnel are authorized to order and diagnostically interpret dental radiographs?
Dental X-Ray technician
Front desk personnel
Dental Officers
Dental technicians
How often should the surfaces in the dark room be disinfected?
Daily
Weekly
Bi-Weekly
Monthly
Of the following personnel who is NOT allowed to order radiographs?
IDC
HM
PA
MO
All of the following are indications for a PA (posterior & Anterior) of the chest, EXCEPT?
Pain with respiration
Chronic cough
Asbestos
Rash and streaking
Which of the following organs will not be seen in a KUB radiograph?
Kidney
Liver
Ureters
Bladder
Which of the following structures will be seen in the AP projection of the cervical spine?
C1-T3
C2-T4
C3-T1
C3-P0
A patient presenting with chronic cervical spine pain should be ordered what type of radiograph?
KUB
AP Cervical Spine
Pelvic
Chest PA
At approximately what angle should the ankle be when taking an oblique radiograph?
30
45
60
90
What should be shielded when you are taking an X-ray?
Hypothalamus
Heart
Reproductive organs
Scrotum
The paralleling device consists of which of the following parts?
A locator ring
An indicator rod
a bite-block
All of the above
The bisecting angle technique is the preferred method and recommended for routine use when taking periapical radiographs.
When taking radiographs, which of the following factors should you consider before using the bisecting-angle technique?
There are no paralleling devices available
The patient cannot close mouth on bite-block
The patient has a rubber dam in place
What landmark is used when exposing the maxillary bicuspid area?
Tip of the nose
Beside the ala of the nose
Below the pupil of the eye
Below the out angle of the eye and below the zygomatic bone
The position of the patient’s mid-sagittal plane must be perpendicular to the floor when exposing a periapical radiograph using the bisecting-angle technique.
The occlusal film packet contains two X-Ray films.
What X-Ray machine settings should you use when exposing a maxillary occlusal radiograph on an adult?
10 mA, 87kVp, and 60 impulses
12 mA, 90kVp, and 60 impulses
10 mA, 90kVp, and 60 impulses
12 mA, 87kVp, and 40 impulses
What vertical angulation setting should you use when exposing a maxillary anterior occlusal radiograph?
+50 degrees
+55 degrees
+60 degrees
+65 degrees
When exposing a maxillary posterior occlusal radiograph, you should use what vertical angulation setting?
+75 degrees
+70 degrees
When exposing a mandibular anterior occlusal radiograph, what vertical angulation should you use?
-10 degrees
5 degrees
0 degrees
+5 degrees
A safe light is the only safe source of illumination used in the darkroom when processing radiographs.
When checking for light leaks in the darkroom, you should leave the penny on the X-Ray film for at least what number of minutes?
One
Five
Three
Seven
Which of the following methods is most commonly used to process dental radiographs in the Navy?
Laser processing
Manual processing
Computer processing
Automatic processing
Which of the following procedures should be included in the daily maintenance of the X-Ray machine?
Dusting
Cleaning with a cloth moistened with water
Both dusting and Cleaning with a cloth moistened with water
Cleaning with a cloth moistened with solvent
You should wait what number of seconds between films before inserting another film into the automatic processor?
12
15
The developer and fixer solutions in the automatic processor should be changed at what minimum frequencies?
Biweekly
Every 3 to 4 weeks
The processing solutions used in the automatic processor are the same as those used in the manual processing procedure.
The cleaning of the roller transports and the solutions in the automatic processor are accomplished at what minimum intervals?
Twice a day
Which teeth can be identified radiographically by a large white region caused by the bone of the nasal septum?
Mandibular incisors
Mandibular cuspids/bicuspids
Maxillary incisors
Maxillary incisors and bicuspids
When mounting radiographs, the raised dimple should be facing you.
You should attempt to complete all X-Ray repairs yourself.
