DA Test Q/A RHS

Includes questions from the Chapter 38 exam, Chapter 38 term test, Chapter 39 exam, Chapter 39 term test, Chapter 40 quiz, RHS Practice Test and X-ray Test

To correct an elongated image on an x-ray view, the vertical angulation needs to be:

Increased

Decreased

Lowered

Flattened

Increased

The major difference between the paralleling technique and the bisecting technique is image receptor:

placement.

size.

sensitivity.

type.

Placement

An instrument that is used to help the dental radiographer position the PID in relation to the tooth and film is the:

film holder

beam alignment device

collimating device

none of the above

beam alignment device

Once films are removed from the mouth, they are considered contaminated and should be:

given to the patient to hold.

handled only with gloved hands.

left on the counter in the operatory to accelerate exposure.

heat-sterilized.

Handled with only gloves on

The number of x-ray views that makes a patient’s full-mouth series depends on the:

presence of active periodontitis.

number of teeth present in the patient’s mouth.

history of interproximal caries.

frequency of the insurance benefit.

number of teeth

What is the purpose of the insulating oil that fills the x-ray machine housing and surrounds the x-ray tube?

Lubricates the yoke of the tubehead so it does not squeak.

Absorbs heat created by the production of x-rays.

Stabilizes and prevents drifting of the tubehead.

Insulates the tubehead from the sounds created by depressing the exposure button.

Absorbes heat

When a size #2 film sensor is used, the anterior films are in the ______ position, and the posterior films/sensors are in the ______ position.

horizontal; horizontal

vertical; vertical

vertical; horizontal

horizontal; vertical

vertical; horizontal

Vertical; Horizontal

Which device is used to align the x-ray beam and the film or sensor during exposure?

 Automatic processor

Beam alignment device

Cassette

Label side

Beam alignment device

The difference in degrees of blackness on an image is called:

Density

Contrast

Sharpness

Contrast

Distortion

Contrast

Following removal of an exposed film or PSP from a patient’s mouth, the film/PSP should be:

sterilized in a heat sterilizer.

immersed disinfecting solution.

wiped free of saliva using a dry 2 × 2–inch gauze sponge or paper towel.

rinsed off in the sink and placed in an ultrasonic cleaner.

2×2

Which term describes the type of film that is used to capture images of the entire dental arch and surrounding structures?

Periapical

Occlusal

Panoramic film

Intraoral film

Panoramic film

The penetrating power of the x-ray beam is controlled by the settings on the:

kilovoltage setting.

milliamperage setting.

exposure button.

master switch. 

Kilovoltage setting

What should the dental assistant do if a patient refuses dental imaging?

a. Document in the patient’s record the fact that he or she refused recommended dental imaging.

b. Tell the patient that the dentist doesn’t mind working without dental images.

c. Attempt to take the dental images anyway.

d. Ask the patient to sign a waiver releasing the dentist from any liability for treating the patient without taking dental radiographs.

a

The lead collimator is used to:

remove long wavelengths.

restrict the size and shape of the primary beam.

make the primary beam more accurate.

stop production of the primary beam.

restrict size and shape

What does ALARA stand for in dental radiology?

Always Locate Anatomical Radiographs Accordingly

As Low As Reasonably Achievable

Advanced Luminescent And Radiographic Analysis

Annual Limitation on Radiation Amounts

As Low As Reasonably Achievable

Who is responsible for overall quality assurance in a dental practice?

Dentist

Dental assistant

Dental hygienist

Office manager

Dentist

In the paralleling technique, the central ray of the x-ray beam must be _____ to the film sensor and the long axis of the tooth.

intersecting

interproximal

parallel

perpendicular

perpendicular

The American Academy of Oral and Maxillofacial Radiology recommends using the paralleling technique because:

it is an easier technique to use than the bisecting technique.

it provides the most accurate image with the least amount of radiation exposure.

the film sensor is placed closer to the teeth, therefore reducing the chance of patient gagging.

it is better than the bisecting technique for the patient with a small mouth, a shallow maxillary palate, or large tori.

it provides the most accurate image with the least amount of radiation exposure.

X-RAY EXPOSURE TIME SHOULD BE INCREASED IF THE PATIENT IS:

Very old

Edentulous

A large adult

Very young

A large adult

The focal spot in the anode is made of:

Copper

Tungsten

Lead

Aluminum

Tungsten

Which term describes the blurriness or lack of detail on a radiograph?

Distortion

Penumbra

Magnification

Latent period

Penumbra

Transporting PSP films should be done by placing them in:

your lab coat pocket.

a black transfer box.

a paper cup.

a baggy with disinfecting solution.

black transfer box

Which of the following statements is true regarding federal and state regulations on the use of dental x-ray equipment?

All dental x-ray machines manufactured or sold in the United States after 1934 must meet federal regulations.

Most states have laws that require inspections of dental x-ray equipment on a regular basis.

The use of dental x-ray equipment is regulated by federal but not state regulations.

The federal government requires x-ray machines to be registered and charges a fee for this registration.

Most states have laws that require inspections of dental x-ray equipment on a regular basis.

Most states have laws that require inspections of dental x-ray equipment on a regular basis.

Failure to obtain informed consent from a patient prior to exposure of dental radiographs can lead to charges of:

informed consent.

disclosure.

respondeat superior.

negligence.

negligence.

What is the usual number of posterior film sensor images taken in the parallel technique?

2

4

6

8

8

When the master switch is on:

x-rays are being produced.

the red emission light will illuminate.

photons travel from the cathode to the anode in the tubehead.

the electron cloud is created around the tungsten filament.

the electron cloud is created around the tungsten filament.

The charge-coupled device (CCD) in direct digital imaging sensors is made of:

silicon.

phosphor.

tungsten.

silver halide.

silicon.

The maximum permissible dose for an occupational worker for an individual 18 years of age or older is _____ rem/year.

5

1.25

0.3

3

5

A step-down transformer is necessary within the x-ray circuitry to:

move electrons at a high speed to the target.

produce photons of sufficient energy to pass through the aluminum filter.

boil off electrons from the filament.

increase exposure time.

boil off electrons from the filament.

Radiographic images on an edentulous patient might be required for the detection of:

interproximal caries.

defective margins on crowns.

retained root tips, impacted teeth, and lesions.

a periapical abscess.

retained root tips, impacted teeth, and lesions.

An exposure time of 1/4 second is equal to _____ impulse(s).

1/2

15

30

2

15

The X-ray tube is the _______ of the x-ray generating system.

heart

Each of the following statements is true about taking radiographs using the paralleling technique except:

the central ray must be perpendicular to the film sensor and the long axis of the tooth.

the film sensor must be placed directly against the teeth being exposed.

failure to center the central ray on the film sensor could result in a cone cut.

the central ray must be directed through the contact areas between the teeth.

the film sensor must be placed directly against the teeth being exposed.

Dental patient records must contain documentation of the ______ of dental images taken.

Number and type

Kilovoltage potential (kVp)

Milliamperage

Exposure time

Number and type

Digital radiography requires less radiation than traditional radiography because the:

exposure time is increased.

sensor is smaller.

sensor is more sensitive to x-ray energy.

sensor is attached to the computer.

sensor is more sensitive to x-ray energy.

n adults, a size #___ intraoral film is used for the occlusal technique.

0

1

2

4

2

The most commonly used film size for adult intraoral dentistry is size:

#0.

#2.

#3.

#4.

#2

Basic principles of the bitewing technique include the:

film sensor is placed parallel to the crowns of the teeth.

blue Rinn-type holder is used to stabilize the film sensor in the patient’s mouth.

central ray is directed through the contacts of the teeth using +10 degrees’ horizontal angulation.

angulation of the PID is not a factor in the bitewing technique.

film sensor is placed parallel to the crowns of the teeth.

For the patient with a hypersensitive gag reflex, the teeth that should be exposed last are:

maxillary molars.

mandibular molars.

mandibular anteriors.

maxillary premolars.

maxillary molars.

What type of film is used to capture images of the crowns and roots of teeth in one image?

Bitewing

Panoramic film

Cephalometric film

Occlusal

Bitewing

The x-ray was discovered in 1895 by:

Edmund Kells.

G.V. Black.

Wilhelm Conrad Roentgen.

John Greenwood.

Wilhelm Conrad Roentgen.

When taking a premolar bitewing image, the anterior edge of the film sensor should be placed:

in the middle of the first premolar.

on the distal half of the canine.

on the distal half of the lateral incisor.

on the mesial surface of the second premolar.

on the distal half of the canine.

An anterior set of images includes:

premolars and molars.

canines and incisors.

canines and premolars.

incisors and molars.

canines and incisors.

A periapical view shows the tooth from the occlusal surface or incisal edge to about _____ mm beyond the apex to show the periapical bone.

0 to 1

1 to 2

2 to 3

3 to 4

2 to 3

When taking periapical x-rays, the patient’s head is _____ for maxillary films and _____ for the mandibular arch.\

tilted back slightly; tilted back slightly

tilted back slightly; upright

upright; tilted back slightly

upright; upright

upright; tilted back slightly

Damage caused by ionizing x-radiation to genetic cells:

affects only the dental assistant.

affects only the person being exposed.

can affect future generations.

affects the cells of the eye, skin, and oral mucosa.

can affect future generations.

An intraoral full-mouth survey contains:

both periapical and bitewing images.

periapical images but not bitewing images.

bitewing images but not periapical images.

neither periapical nor bitewing images.

both periapical and bitewing images.

All of the following are true statements regarding the preparation of the radiography operatory for dental imaging except:

barriers should be used on all surfaces that cannot be easily cleaned and disinfected.

barriers are preferred over switches to prevent electrical shorts.

barriers do not need to be used because spatter of blood and saliva is unlikely.

the lead apron should be considered contaminated and wiped with a disinfectant after each use.

barriers do not need to be used because spatter of blood and saliva is unlikely.

The number of bitewing films needed is based on the curvature of the arch and the:

age of the patient.

size of the patient’s mouth.

number of teeth present in the posterior areas.

number of periapical images taken.

number of teeth present in the posterior areas.

What is the device used to measure radiation exposure called?

Dosimeter

Thyroid collar

Personal radiation monitoring badge

Extension arm

Dosimeter

When exposing radiographs, what is the minimum distance the operator should stand from the tube head?

2 feet

4 feet

6 feet

8 feet

6 feet

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

be doubled

increase

remain unchanged

decrease

decrease

Patients receive less radiation when using a/an

rectangular PID.

recessed PID.

round PID.

external PID,

rectangular PID.

The purpose of the aluminum disc in the x-ray tubehead is to 

prevent scatter radiation.

filter out long wave x-rays from the primary beam.

filter out short wave x-rays from the primary beam. 

prevent distortion on the radiograph.

filter out long wave x-rays from the primary beam.

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

Cone-shaped

Rectangular-shaped

Oblong-shape

Closed-end pointed shape

Rectangular-shaped

Which of the following will best protect the dental assistant from cross-contamination while exposing radiographs?

Gloves

Barriers on PID

senor positioning devices

Patient bib

Gloves

The most important responsibility of the dental assistant in dental radiography is

retaking radiographs.

implementing ALARA principle.

calculating exposure time.

selecting the correct setting

implementing ALARA principle.

If a patient has a cough or cold what PPE should the operator wear while exposing digital radiographs? 

Mask

Eye protection

Gloves 

All of the above

All of the above

Which of the following influences the sharpness of a radiograph? 

Focal spot size

X-ray beam angulation

Object-receptor alignment

kVp and mA

Focal spot size

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

clean the surface using alcohol wipes.

sterilize the surface using a chemical sterilant.

disinfect the surface with an intermediate-level disinfectant.

dry the surface using a clean 2x2 gauze.

disinfect the surface with an intermediate-level disinfectant.

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

Genial tubercle

Anterior nasal spine

Mental foramen

Retromolar pad

Anterior nasal spine

Which of the following condition may mimic caries on an intraoral image? 

Residual cysts of the mandible

Pulp stones

Root resorption

Secondary dentin formation

Root resorption

What can be done to stabilize the biteblock on a partially edentulous patient? 

Have patient hold the biteblock

Use a cotton roll

Leave the partial denture in the mouth.

Have family member hold the biteblock

Use a cotton roll

Which of the following is the most effective method of reducing patient exposure to x-radiation?

Lead apron

Thyroid collar

Frequent retakes

digital radiography

digital radiography

Radiation injury can be measured by

dose rate.

kVp.

somatic dose.

mA. 

dose rate.

Which of the following bones is suspended between the mandible and the larynx?

Ethmoid

Palatine

Hyoid

Lacrimal

Hyoid

Dental healthcare personnel who are pregnant can expose radiographs during the

second tirmester.

first trimester.

third trimester. 

entire pregnancy. 

entire pregnancy. 

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

Endoray

Eezee-Grip

Precision holder

Stabe

Eezee-Grip

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

periapical.

panoramic.

cephalometric.

occlusal. 

occlusal. 

When taking an occlusal radiograph, the PSP packet should extend from the patient's mouth by approximately

1/8 - 1/4 inches.

1 1/8 - 1 1/4 inches.

1/2 - 5/8 inches.

3/4 - 1 inches. 

1/8 - 1/4 inches.

When preparing a patient for digital exposures, PRIOR to putting on gloves the dental assistant should

adjust lighting.

wipe the sensor with an intermediate disinfectant.

assemble the positioning device.

place the lead apron.

place the lead apron.

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

1.50 inches.

1.75 inches.

2.5 inches.

2.75 inches. 

2.75 inches. 

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

Round collimation

Short cone paralleling

digital radiography

High kVp

High kVp

The Frankfort Plane is an imaginary plane passing through the 

external auditory meatus to the outer canthus of the eye.

ala of the nose to tragus of the ear.

ala of the nose to the bottom of the ear. 

external auditory meatus to the floor of the orbit. 

external auditory meatus to the floor of the orbit. 

Personnel radiation monitoring devices are worn to 

record the background exposure received by the patient.

alert the operator when an exposure occurs. 

record the occupational exposure received by the operator. 

alert the patient when an exposure occurs. 

record the occupational exposure received by the operator. 

What type of film is used to capture images of the crowns and roots of teeth in one image?

Bitewing

Panoramic film

Cephalometric film

Occlusal

Bitewing

What should the dental assistant do if a patient refuses dental imaging?

Document in the patient’s record the fact that he or she refused recommended dental imaging.

Tell the patient that the dentist doesn’t mind working without dental images.

Attempt to take the dental images anyway.

Ask the patient to sign a waiver releasing the dentist from any liability for treating the patient without taking dental radiographs.

Document in the patient’s record the fact that he or she refused recommended dental imaging.

Who is responsible for overall quality assurance in a dental practice?

Dentist

Dental assistant

Dental hygienist

Office manager

Dentist

Which device is used to align the x-ray beam and the film or sensor during exposure?

 Automatic processor

Beam alignment device

Cassette

Label side

Beam alignment device

A good protocol to follow for decreasing the contamination of dental imaging equipment if additional supplies are needed during a procedure is to:

use bare hands to retrieve additional supplies.

ask the patient to retrieve the supplies for you.

use overgloves.

obtain the supplies and then redisinfect all surfaces and replace all barriers.

use overgloves.

Regulations regarding certification for dental assistants in radiography:

are not required by federal law.

vary from state to state.

do not exist.

require Dental Assisting National Board (DANB) certification in all states.

vary from state to state.

Sterilized positioning instruments should be removed from the packages:

before the patient is seated.

after the patient is seated.

at any time.

in the sterilization area.

after the patient is seated.

Who can be held legally responsible for a dental assistant’s actions?

The dentist

The dental assistant

Both the dentist and assistant

The patient

Both the dentist and assistant

Dental images are the property of the:

dentist.

patient.

patient’s insurance company.

state board.

dentist.

Dental patient records must contain documentation of the ______ of dental images taken.

Number and type

Kilovoltage potential (kVp)

Milliamperage

Exposure time

Number and type

Once films are removed from the mouth, they are considered contaminated and should be:

given to the patient to hold.

handled only with gloved hands.

left on the counter in the operatory to accelerate exposure.

heat-sterilized.

handled only with gloved hands.

According to the Centers for Disease Control (CDC) Guidelines for Infection Control in Dental Healthcare Settings—2003, digital radiography sensors:

are single-use items and should be disposed of between patients.

do not require a barrier; they should be wiped down with disinfectant between patients.

should use FDA-cleared barriers.

should be heat sterilized.

should use FDA-cleared barriers.

Following removal of an exposed film or PSP from a patient’s mouth, the film/PSP should be:

sterilized in a heat sterilizer.

immersed disinfecting solution.

wiped free of saliva using a dry 2 × 2–inch gauze sponge or paper towel.

rinsed off in the sink and placed in an ultrasonic cleaner.

wiped free of saliva using a dry 2 × 2–inch gauze sponge or paper towel.

It is the responsibility of the ____ to discuss the need for dental imaging.

dental assistant

dentist

dental hygienist

dentist

dental hygienist and dentist

dentist

Which of the following statements is true regarding federal and state regulations on the use of dental x-ray equipment?

All dental x-ray machines manufactured or sold in the United States after 1934 must meet federal regulations.

Most states have laws that require inspections of dental x-ray equipment on a regular basis.

The use of dental x-ray equipment is regulated by federal but not state regulations.

The federal government requires x-ray machines to be registered and charges a fee for this registration.

Most states have laws that require inspections of dental x-ray equipment on a regular basis.

Most states have laws that require inspections of dental x-ray equipment on a regular basis.

Failure to obtain informed consent from a patient prior to exposure of dental radiographs can lead to charges of:

informed consent.

disclosure.

respondeat superior.

negligence.

negligence

Transporting PSP films should be done by placing them in:

your lab coat pocket.

a black transfer box.

a paper cup.

a baggy with disinfecting solution.

a black transfer box.

Digital radiography requires less radiation than traditional radiography because the:

exposure time is increased.

sensor is smaller.

sensor is more sensitive to x-ray energy.

sensor is attached to the computer.

sensor is more sensitive to x-ray energy.

Which type of film is used for capturing images inside the mouth?

Extraoral film

Panoramic film

Intraoral film

Cephalometric film

Intraoral film

All of the following are true statements regarding the preparation of the radiography operatory for dental imaging except:

barriers should be used on all surfaces that cannot be easily cleaned and disinfected.

barriers are preferred over switches to prevent electrical shorts.

barriers do not need to be used because spatter of blood and saliva is unlikely.

the lead apron should be considered contaminated and wiped with a disinfectant after each use.

barriers do not need to be used because spatter of blood and saliva is unlikely.

Which device is used to align the x-ray beam and the film or sensor during exposure?

Automatic processor

Beam alignment device

Cassette

Label side

Beam alignment device

What type of film is used to capture images of the crowns and roots of teeth in one image?

Bitewing

Panoramic film

Cephalometric film

Occlusal

Bitewing

Which type of film is used for capturing images inside the mouth?

Extraoral film

Panoramic film

Intraoral film

Cephalometric film

Intraoral film

Which technology uses a phosphor storage plate to capture and store x-ray images?

Charge-coupled device (CCD)

Teledentistry

Digital image

Phosphor storage plate (PSP)

Phosphor storage plate (PSP)

Which term describes the type of film that is used to capture images of the entire dental arch and surrounding structures?

Periapical

Occlusal

Panoramic film

Intraoral film

Panoramic film