NELDA Practice Test 1

If a patient tries to look at the technician during a panoramic radiograph, what will the image look like?

Teeth large on one side of the image and small on the other side

What is used to take a panoramic radiograph?

Film cassette

The computer used for digital imaging

can be used for other office functions

which way do x-rays travel?

straight line

A radiograph that is too light is most likely an example of what?

Underexposed

A film that is too light is the result of?

Increasing target-to-film distance

A herringbone pattern on low density film is caused by?

Backward placement of the film packet

Which intraoral radiograph would you use on a patient who needs oral surgery?

Periapical

The speed of film is determined by?

The size of the silver halide crystals

The thyrocervical collar is positioned to cover the?

Throat

Film speed is not determined by?

Black paper in film packet

How many film sizes do you have to choose from with a bitewing radiograph?

4

What size film is used when taking occlusals?

Size 4

What is the benefit of using dual film packets?

Protects pts from unnecessary radiation, cost effective, creates two images in one exposure

What is the best way to prevent fingerprints on film?

Wear gloves

What is NOT true of patients who do not have teeth?

They do not need radiographs

A tissue that lies within primary dental beam and is very radiosensitive is the?

Cornea

What should you do for a nervous patient?

Explain the steps of the radiography

What will static electricity cause on a panoramic image?

Black marks

The oldest intraoral radiographic technique is the?

Bisecting the angle technique

The dental assistant is using a size 2 receptor for anterior placements using the bisecting technique. Which of the following radiographs would be exposed first?

Canine (tooth #6)

What option does digital imaging have that traditionally radiography lacks?

3-D

Long exposure time for dental x-ray film results in?

Dark film

A radiograph with high resolution is?

Sharp

Radiographic images which provide a wider view of either the entire mandibula or maxilla are known as which of the following?

Occlusal

Less radiation is required by digital radiography than conventional radiography because?

The sensor is more sensitive to x-rays

A device that intercepts the x-ray beam after it has passed through the patient's body and produces an image in digital form is called?

Image receptor

Which of the following is NOT a historical finding that indicates the need for radiography?

Swelling

How much should exposure time for children be reduced in intraoral radiography?

One-third

Vertical bitewing radiographs are recommended over horizontal bitewing radiographs when?

Adults have periodontal disease

If a safelight filter is used, prolonged exposure can do what?

Still damage film emulsion

How many seconds should you allow between films when feeding them into the processor?

10

A film has a streaks and scratches after being processed. What is the cause?

Emulsion tear

Light images with a herringbone pattern indicate which of the following?

The film was placed in the patient's mouth backwards

The rollers in automatic processors should be cleaned weekly for how long?

10-15 minutes

Film processing maintenance requires that surfaces of the tanks and countertops should be cleaned with a damp sponge when?

After each use

Processing chemicals should be stores at temperatures of?

30-60 degrees F

Where can potassium alum be found?

In the fixer

Lasers and computer systems are used in?

Digital imaging processing systems

A patient moved while Susan was taking the radiograph. Susan is now concerned the image will be?

Blurred

What does potassium alum do?

Harden the emulsion

Film recover slots are used for what type of film processing?

Automatic film processing

To prevent cross contamination while replenishing solutions, radiograph personnel should?

use separate, labeled paddles

In one automatic processor, the manufacturer states the temperature and time in the developer are inversely related. This means what?

The higher the temperature, the shorter the time

A double image on a processed radiograph indicates which of the following?

The film was exposed twice

Which of the following affects how long processing solutions last?

Solution's concentration, Freshness of the solution, Amount of films processed

Aids used in mounting x-rays are called?

Anatomical landmarks

In standard mounting, which way should the raised dot be oriented on PERIAPICAL radiographs?

Occlusal edges

When the radiographer has finished duplicating the desired patient film, what do they do with the original mounted image?

Return it to the patient's original file

What standard information needs to be included when labeling a patient's radiographs?

Dentist name, patient name, and name of person taking the radiographs

Surface cleaning prevents the transmission of infection caused by?

Direct contact of hands

External chemical monitoring should be placed on?

A packet per load

In reading the material safety data sheet for Clearfil Se Bond; Primer, the dental assistant notices H315 as a hazard statement. What does H315 mean?

Causes skin irritation

What course of action should an employee take if proper infection control precautions are not met?

Contact OSHA

Anna, a new assistant, is being trained by the lead dental assistant on items requiring surface cleaning and disinfection in the operatory. Which item(s) will not require surface cleaning?

Dental explorer or probes

How long should a patient wait before rinsing after oral surgery?

24 hours

It is suspected that a dental assistant has been exposed to Hep B. According to OSHA, what is the maximum amount of time she has to undergo a blood draw to confirm or refute this?

2 hours

It is important to understand the label for a hazardous chemical. Red means?

Flammability

Besides plastic, what is a useful barrier for light switches?

Foil

After communicating possible consequences to a patient, what must happen before a dental procedure?

Informed consent

MSDS stands for

Material Safety Data Sheet

MSDS information required by OSHA includes what?

Physical hazards of substances, provisions for spills and directions for cleanup, the name of the manufacturer of the substance

How is Hep B transmitted from person to person?

Mucosal exposure to blood or body fluids

Engineering controls can apply to what?

IV systems, Needles, PPE

A chemical that requires goggles will have which color on the warning label?

White

When assessing the risk for infection in dentistry, a risk assessment should be performed. Of the items listed, which would be the final step in the process?

Record what you find

There are various types of waste and each must be disposed of properly. Which of the following waste types is defined as "Infectious medical waste that requires special handling, neutralization, and disposal?"

Regulated

Transient microorganisms include?

All pathogenic microorganisms

What is the effect of using emollients?

Reduce bacteria growth

The material safety data sheet for Clearfil Se Bond; Primer lists H317 as a hazard. what is H317?

May cause an allergic skin reaction

When using the cassette instrument sterilizing system, the instrument is kept in the cassette during all, EXCEPT?

Wrapping

How long does it take for microbes from the water supply to cling to tubes?

Hours

What requires soliciting information from non managerial employees?

Exposure control plan

Which of the following will NOT break the link between the infectious agent and the reservoir?

Nutrition

Which of the following is an example of PPE?

Face shield

How long would a dry heat sterilizer at 340 degrees F typically take to sterilize instruments?

1 hour

Which of the following is NOT a required component of the exposure control plan, according the OSHA?

Must be in English and Spanish

What does the number 1 in the yellow section of the chemical hazard label represent?

Slight reactivity hazard

What must be in the solution used to remove debris from surfaces that need to be disinfected?

Detergent

Although infectious agents are present at this stage, they are less in number or not as effective?

Convalescent

Packs are sterilized in what instrument- processing area?

Sterilization/Storage

Stored utensils should be kept away from which of the following?

Pins

Jim is a 55 year old male who has indicates of cardiovascular disease on his pt records. Which cardiovascular disease is linked to oral health and dental procedures and would require additional patient education?

Endocarditis

OSHA requirements for PPE is specific. For instance, clinical gowns must what?

Be changed at least once per day and whenever soiled

There are various types of waste and each must be disposed of properly. Which of the following waste types is defined as "waste capable of causing an infectious disease?"

Infectious

A work practice that would minimize contact with sharp instruments would include what?

Using a long- handled brush when manually cleaning sharp instruments

What is the maximum noise level of the work environment to prevent hearing loss?

85 decibels

Disposal facial masks cannot protect wearers tuberculosis because?

They are ineffective air filters

When removing shoes after a procedure, which precaution is taken?

Touch with paper towels

One problem with disposal face masks when they get wet is that they?

Enhance the movement of bacteria

When using a visible light-cured unit, the risk of retinal damage can be minimized if dental personnel wear?

Special protective glasses

The gloves utilized during surgical procedures involving bone or periodontium are called?

Sterile gloves

Which vaccine is used to prevent a common blood-borne pathogen?

Hepatitis

When hands are not visibly soiled, dental health workers should rub with cleanser for how long?

20-30 seconds

Which of the following is step three when is comes to assessing for risk of infection?

Determine the level of risk

What will the dental assistant do with a spore test in the packaging area?

Monitor sterilizer and make sure it is functioning properly

A patient with a heart murmur has an increased risk of developing which of the following?

Bacterial endocarditis

Which of the following is NOT biohazardous medical waste generally associated with dentistry?

Cultures and stocks

Which action can prevent contaminating the surfaces in a dental operatory?

Using rubbers dams to prevent spray

Disinfectant without tuberculcocidal is NOT useful for which microorganisms?

Geobacillus