DANB RHS Practice Test

To maintain quality assurance while processing films, dental assistants should record

A. the date processing solutions were purchased

b. names of the dental assistants using the developing room

c. the date solutions were changed

d. patient exposures in a daily log

c. the date solutions were changed

Which of the following describes a double-ended film holder used for posterior and anterior teeth?

a. Stabe

b. Eezee-Grip

c. precision holder

d. Endoray

b. Eezee-Grip

A full mouth series of periapical radiographs taken on an edentulous patient will consist of

a. two anterior and four posterior

b. two anterior and eight posterior

c. six anterior and eight posterior

d. six anterior and four posterior

c. six anterior and eight posterior

Which of the following causes the interproximal areas of the teeth to appear overlapped?

a. Improper horizontal angulation

b. Patient talking during exposure

c. Improper vertical angulation

d. Patient with shallow palate

a. Improper horizontal angulation

Which of the following can help to protect patient from excess radiation damage to tissues?

a. Slow film speed

b. Round collimation

c. Short cone paralleling

d. High kVp

d. High kVp

Which of the following protection techniques is used to minimize x-radiation exposure to the operator?

a. Structural shielding

b. Wearing a dosimeter

c. Standing next to the tubehead

d. Wearing a lead line apron

a. Structural shielding

Which of the following radiographic errors is caused by removing a film too quickly from a tightly packed box?

a. Cone cut

b. Herringbone

c. Reticulation

d. Static electricity

d. Static electricity

Compared to radiopaque structures, radiolucent structures

a. absorb more radiation

b. appear dark on a radiograph

c. are dense

d. appear light on a radiograph

b. appear dark on a radiograph

The time between patient exposure to radiation and the appearance of biological damage is the

a. waiting period

b. latent period

c. silent period

d. refractory period

b. latent period

Which of the following is a disposable intraoral x-ray film holder device?

a. Rinn XCP

b. Stabe

c. Eezee-Grip

d. Endoray

b. Stabe

The population most susceptible to radiation damage is

a. senior citizens

b. middle-aged adults

c. infants

d. teenagers

c. infants

Which of the following lesions appears radiopaque on a radiograph?

a. Dentigerous cyst

b. Periapical abscess

c. Sclerotic bone

d. Metastatic carcinoma

c. Sclerotic bone

The main purpose of using a lead apron with a thyroid collar when exposing dental radiographs is to protect the patient from

a. scatter radiation

b. the primary beam

c. infectious agents

d. hazardous materials

a. scatter radiation

Which of the following affects the speed of the electrons emitted from the tubehead?

a. kVp

b. mA

c. Filtration

d. Impulses

a. kVp

When using an automatic processor, how many seconds should be allowed between the insertion of each dental film?

a. 10

b. 20

c. 5

d. 15

a. 10

Which type of gloves are required for the decontamination of the darkroom?

A. Powder-free

b. Nitrile utility

c. Latex-free

d. Vinyl

b. Nitrile utility

Which of the following landmarks are located by the midline of the mandible?

a. Genial tubercles

b. Mental foramen

c. Mandibular foramen

d. Mandibular canal

a. Genial tubercles

Which of the following is a measurement of tissue damage from x-ray energy?

a. Radiation absorbed dose

b. Genetic effects

c. Chemical changes

d. Cell sensitivity

a. Radiation absorbed dose

Which of the following landmarks is useful when mounting films in the maxillary central area?

a. Genial tubercle

b. Anterior nasal spine

c. Mental foramen

d. Retromolar pad

b. Anterior nasal spine

If there are no teeth to serve as guides, which of the following landmarks indicated a maxillary molar area radiograph?

a. Internal oblique ridge

b. Mental foramen

c. Incisive foramen

d. Tuberosity

d. Tuberosity

After an exposed film has been removed from a patients mouth, the next steps is to

a. clean the exposed film with a low-level disinfectant

b. wash hands

c. dry the exposed film

d. place the exposed film in the automatic processor

c. dry the exposed film

Cone beam computed tomography uses

a. 3-dimensional technology

b. panoramic cassettes

c. 8 × 10 extraoral film

d. customized film holders

a. 3-dimensional technology

On a full mouth series with eighteen films, how many anterior films are exposed?

a. 7

b. 5

c. 6

d. 8

c. 6

A panoramic image appears to have a “reverse smile” when the

a. midsagittal plane is angled to the right

b. midsagittal plane is angled to the left

c. Frankfort plane is angled upward

d. Frankfort plane is angled downward

c. Frankfort plane is angled upward

Prior to exposing dental radiographs on a visually impaired patients, the dental assistant should

a. ask the caregiver to stabilize the film

b. set the exposure time to increase radiation

c. use touch to explain the equipment and procedure

d. set the exposure time to decrease radiation

c. use touch to explain the equipment and procedure

When exposing a panoramic radiograph on an edentulous patient, which of the following would a dental assistant use to stabilize the upper and lower arch on the bite block?

a. Head positions

b. Chin rest

c. Cotton rolls

d. Separators

c. Cotton rolls

Which of the following is a DISADVANTAGE of panoramic radiographs?

a. Higher cost of equipment

b. Less radiation exposure

c. More radiation exposure

d. Lower cost of equipment

a. Higher cost of equipment

A panoramic radiograph with a dark shadow over the apices of the maxillary teeth may be caused by the patient

a. not appropriately positioned in the focal trough

b. not biting on the bite block correctly

c. not placing the tongue against the palate

d. placing the tongue against the palate

c. not placing the tongue against the palate

To prevent cross-contamination, wipe the counter top with

a. alcohol wipes

b. an EPA-approved disinfectant

c. soap and water

d. bleach solution

b. an EPA-approved disinfectant

For x-ray machines operating in ranges at or below 70 kVp, the total aluminum equivalent filtration must be a minimum of

a. 1.0 mm

b. 2.5 mm

c. 2.0 mm

d. 1.5 mm

d. 1.5 mm

When documenting a lesion found on a radiograph, all of the following should be described EXCEPT

a. location

b. severity

c. size

d. appearance

b. severity

Which film would be exposed to see the relationship of the alveolar bone?

a. Horizontal bitewing

b. Vertical bitewing

c. Periapical

d. Occlusal

b. Vertical bitewing

Which of the following film sizes would be used for an adult periapical film?

a. 0

b. 2

c. 3

d. 4

b. 2

Which of the following describes how most radiographic carious lesions appear?

a. Radiolucent

b. Radiopaque

c. Mixed density

d. Undetectable

a. Radiolucent

Which of the following can be observed on a panoramic radiograph when the patient chin is tipped downward?

a. Exaggerated smile

b. Anterior teeth appear widened

c. Narrow smile

d. Teeth appear superimpose

a. Exaggerated smile

Which of the following may mimic caries on an intraoral radiograph?

a. Pulp stones

b. Residual cysts of the mandible

c. Secondary dentin formation

d. Root resorption

d. Root resorption

How often should protective clothing be changed in an oral healthcare setting?

a. Once weekly

b. Twice daily

c. After each patient

d. When visibly soiled

d. When visibly soiled

Which of the following is a long-term effect of radiation?

a. Hair loss

b. Genetic defects

c. Nausea

d. Hemorrhage

b. Genetic defects

Duplicating film is coated with

a. one-sided emulsion

b. two-sided emulsion

c. two-sided polyester base

d. one-sided polyester base

a. one-sided emulsion

Which of the following is the first step in processing radiographic film?

a. Developing

b. Drying

c. Fixing

d. Rinsing

a. Developing

Which of the following equations is used to determine the occupational maximum accumulated does (MAD) of radiation?

a. Age plus 18 times 5 rems/year

b. Age minus 5 rems/years plus 18

c. Age plus 5 rems/year minus 18

d. Age minus 18 times 5 rems/year

d. Age minus 18 times 5 rems/year

If a patient did not remove earrings prior to exposing a panoramic, the radiograph could have

a. magnified images

b. ghost images

c. double images

d. radiolucent images

b. ghost images

Radiographs appear dark after processing when the developing solution is

a. depleted

b. contaminated

c. too cold

d. too warm

d. too warm

Which of the following was established to address the education and certification of operators of radiographic equipment?

a. International Commission on Radiation Units and Measurments

b. Consumer-Patient Radiation Health and Safety Act

c. National council on Radiation Protection and Measurments

d. Radiation Control for Health and Safety

b. Consumer-Patient Radiation Health and Safety Act

Compared to a dentulous patient, radiographic exposure time on an edentulous adult patient should

a. remain unchanged

b. increase

c. decrease

d. be doubled

c. decrease

Which of the following sequences best describes radiation injury to the tissue?

a. Period of injury, latent period, period of recovery

b. Latent period, period of recovery, period of injury

c. Latent period, period of injury, period of recovery

d. Period of recovery, period of injury, latent period

c. Latent period, period of injury, period of recovery

A processed film has a straight, clear border on the upper edge. This error is caused by

a. improper film placement during exposure

b. fixer solution too low

c. white light leak in dark room

d. developer solution too low

d. developer solution too low

Patients should wear a thyroid collar during which type of radiographic exposure?

a. Panoramic radiograph

b. Extraoral radiograph

c. Intraoral radiograph

d. Cephalometric radiograph

c. Intraoral radiograph

Which of the following best describes what happens when two films contact each other during processing?

a. Fogged films

b. Reticulation

c. Static electricity

d. Overlapped films

d. Overlapped films

Blurred radiographic images are often caused by

a. Failure to remove dental appliances

b. Patient movement during exposure

c. Improper positioning of the x-ray tube head

d. overlapping bitewing

b. Patient movement during exposure

The edentulous radiographic series may include all of the following EXCEPT

a. occlusals

b. periapicals

c. bitewings

d. panoramic

c. bitewings

When removing a protective barrier after the exposure of radiographs, if a dental assistant touches the surface beneath the barrier the dental assistant must

a. dry the surface using clean 2×2 gauze

b. clean the surface using alcohol wipes

c. disinfect the surface with an intermediate-level disinfectant

d. sterilize the surface using a chemical sterilant

c. disinfect the surface with an intermediate-level disinfectant

Which of the following may cause unnecessary radiation exposure to the patient?

a. Endodontic radiographs

b. Standard radiographs during exam appointment

c. Standard radiographs during recall appointment

d. Radiograph technique errors

d. Radiograph technique errors

Long-term effects of exposure to radiation may be associated with

a. birth abnormalities

b. hair loss

c. hemorrhaging

d. nausea and vomiting

a. birth abnormalities

Processed films should be handled by the edges to prevent

a. discoloration

b. fingerprints

c. cone cuts

d. contamination

b. fingerprints

The Frankfort Plane is an imaginary plane passing through the

a. ala of the nose to the bottom of the ear

b. ala of the nose to tragus of the ear

c. external auditory meatus to the outer canthus of the eye

d. external auditory meatus to the floor of the orbit

d. external auditory meatus to the floor of the orbit

All of the following can be used for handling film in the daylight loader EXCEPT

a. utility gloves

b. latex exam gloves

c. plastic overgloves

d. powder-free exam gloves

a. utility gloves

The most common artificial radiation exposure comes from

a. atomic weapon fallout

b. consumer products

c. medical radiation

d. the nuclear fuel cycle

c. medical radiation

The primary purpose of the bitewing radiograph is to evaluate

a. tooth formation and eruption

b. root surface decay

c. interproximal decay

d. crowns and apices

c. interproximal decay

Which organization regulates disinfectants and chemical sterilants?

a. FDA

b. EPA

c. CDC

d. ADA

b. EPA

Which of the following regulates the manufacturing and installation of x-ray equipment?

a. Federal government

b. Local government

c. American Dental Association

d. State government

a. Federal government

Which of the following should be used to prevent cross-contamination from exposure buttons?

a. Plastic cover

b. Alcohol wipe

c. Bleach solution

d. Disinfectant spray

a. Plastic cover

Light-colored radiographs commonly result from

a. underexposure

b. overdevelopment

c. excessive kVp

d. holding the exposure button too long

a. underexposure

which of the following would cause elongation on a radiograph?

a. Excessive vertical angulation

b. Insufficient vertical angulation

c. Insufficient horizontal angulation

d. Excessive horizontal angulation

b. Insufficient vertical angulation

The total destruction of microorganisms and spores on reusable instruments is accomplished by

a. disinfecting

b. spraying with a germicide

c. ultrasonic immersion

d. sterilizing

d. sterilizing

The radiation exposure that poses the greatest hazard to the operator is

a. primary radiation

b. collimated radiation

c. scatter radiation

d. leakage radiation

d. leakage radiation

The radiation that is formed by the interaction of x-rays with matter is

a. primary radiation

b. bremsstrahlung radiation

c. secondary radiation

d. scattered radiation

c. secondary radiation

Which of the following helps to decrease exposure of the thyroid gland from the primary radiation beam?

a. Bisecting angle technique

b. Use of round collimation

c. Paralleling technique

d. Decreasing the x-ray focal plane

c. Paralleling technique

When exposing a posterior periapical radiograph on an adult patient with no intraoral restrictions, which size film should be used?

a. 4

b. 3

c. 2

d. 1

c. 2

Which of the following results in a double image radiograph?

a. Exposing a duplicating film

b. Exposing the same film twice

c. Processing two exposed films together

d. Processing two unexposed films together

b. Exposing the same film twice

During the process of x-ray film, the removal of the halide portion of the exposed silver crystals is called

a. activation

b. reduction

c. converion

d. hardening

b. reduction

What is the primary advantage in using digital radiography?

a. Increases comfort for the patient

b. Reduces the radiation to patient

c. Increases image density

d. Reduces image contrast

b. Reduces the radiation to patient

Phosphor plates are processed by using

a. chemical solutions

b. cone-beam computed tomography

c. digital sensor technology

d. laser beam technology

d. laser beam technology

Which of the following is most likely to cause a stored radiograph to turn brown over time?

a. underwashing

b. overexposure

c. overdevelopment

d underexposure

a. underwashing

The Buccal Object Rule is used to determine if a foreign body is located in which direction?

a. Buccal to the distal

b. Occlusal to apical

c. Lingual to buccal

d. Subgingival to supragingival

c. Lingual to buccal

The purpose of a grad device on an extraoral cassette is to

a. reduce patient exposure to radiation

b. guide x-rays to the film

c. guide x-rays to the appropriate tissue

d. reduce scatter radiation reaching the film

d. reduce scatter radiation reaching the film

Which of the following will cause white spots to appear on radiographs?

a. Developer solution contacts the film

b. Fixer solution is hotter than recommended

c. Fixer solution contacts the film

d. Developer solution is hotter than recommended

c. Fixer solution contacts the film

How often should step wedge quality control tests for a dental x-ray machine be conducted?

a. weekly

b. daily

c. monthly

d. annually

b. daily

compared to a round position-indicating device (PID), which of the following PIDs reduces patient radiation exposure by up to 70 percent?

a. Cone-shaped

b. Closed-end pointed shape

c. Oblong-shape

d. Rectangular-shaped

d. Rectangular-shaped

To view an abscess on tooth #25, the best radiographic exposure is a/an

a. bitewing

b. panoramic

c. occlusal

d. periapical

d. periapical

Back-scatter radiation to the film is prevented by the

a. lead foil

b. polysoft wrapping

c. black paper

d. outer wrap

a. lead foil

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

a. convert silver halide to black metallic silver

b. build density and contrast on film

c. remove unexposed silver halide crystals

d. slow the oxidation rate of emulsion

c. remove unexposed silver halide crystals

Before exposing radiographs on a minor, the dental assistant should

a. obtain consent from parent or legal guardian

b. explain radiographs are required by insurance

c. explain radiographs are mandatory for all patients

d. obtain consent from the patient

a. obtain consent from the parent or legal guardian

Which of the following prevents x-rays from escaping the tubehead?

a. Cathode

b. Anode

c. Tungsten filament

d. Leaded-glass housing

d. Leaded-glass housing

Which of the following extraoral radiographs is used to evaluate impacted teeth, large lesions and fractures of the mandible?

a. Reverse Towne projection

b. Waters projection

c. Posteroanterior projection

d. Lateral jaw projection

d. Lateral jaw projection

Which of the following PID produces the greatest amount of secondary radiation?

a. Close-end plastic cone

b. Close-end aluminum cylinder

c. Open-end lead-lined rectangular

d. Open-end lead-lined cylinder

a. Close-end plastic cone

The BEST radiograph to evaluate a suspected salivary stone in the submandibular gland is a/an

a. cephalometric

b. periapical

c. panoramic

d. occlusal

d. occlusal

To produce ionizing radiation, an atom must

a. add an electron

b. add a proton

c. lose a neutron

d. lost a proton

a. add an electron

When preparing to take a digital radiograph, after selecting the appropriate sensor size for the patient, the next step is to

a. sterilize the sensor

b. attach the wire to the sensor

c. place a barrier on the sensor

d. place the sensor in mouth

c. place a barrier on the sensor

During radiographic exposures, semi-critical items that must be sterilized or disposed of included

a. exposure buttons

b. tubehead

c. film holding devices

d. PID

c. film holding devices

The reduce the patients anxiety about radiographic exposure the dental assistant should

a. take time to explain the procedure

b. use intra-oral photography

c. rapidly complete the procedure

d. only take panoramic films

a. take time to explain the procedure

Dental healthcare personnel can BEST shield themselves from radiation during patient exposure by standing behind

a. a drywall barrier

b. the tubehead

c. a glass window

d. the patients chair

a. a drywall barrier

When mounting periapical radiographs, what information helps to distinguish maxillary molar radiographs from mandibular molar radiographs?

a. The maxillary molars have two roots

b. The maxillary sinus outline is visible

c. The mandibular second molar has one root

d. The mandibular molars are larger

b. The maxillary sinus outline is visible

The purpose of intensifying screens is to

a. increase the effect of the radiation

b. increase the amount of radiation

c. decrease the amount of the radiation exposure

d. decrease the effect of radiation exposure

c. decrease the amount of radiation exposure

To help desensitize the tissue prior to film placement, the dental assistant should

a. place the film in dental assistant’s mouth to demonstrate

b. touch the palate with the film

c. expose the most anterior film first

d. rub a finger along the tissues where the film touches

d. rub a finger along the tissues where the film touches

Dental assistants exposing x-rays can best be protected from scatter radiation by

a. wearing a lead apron

b. wearing a film badge

c. standing behind a lead barrier

d. standing 2 feet away from the tubehead

c. standing behind a lead barrier

How frequently should processing solutions be replenished?

a. As needed

b. Daily

c. Monthly

d. Weekly

b. Daily

Inside the film packet, the film is wrapped with a/an

a. intensifying screen

b. lead foil sheet

c. emulsion

d. black paper sheet

d. black paper sheet

Which of the following landmarks is useful when mounting films in the maxillary posterior area?

a. Floor of the maxillary

b. External oblique ridge

c. Internal oblique ridge

d. Inferior nasal conchae

a. Floor of the maxillary

The primary function of collimation is to

a. Increase target-film distance

b. Eliminate cone cuts

c. Decrease target-film distance

d. Restrict the size of the beam

d. Restrict the size of the beam