Medical Radiography Quiz Questions

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  • 1/121 Questions

    A technique used to measure the operators exposure to radiation is 

    • To check the color of the operators finger nail
    • For the operator to wear a radiation film badge
    • To multiply the number of films the operator has exposed by 0.1 rem
    • To count the number of full mouth xray taken
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About This Quiz

Let's start this quiz it will give you the different functions of medical radiography. Find out now how much do you know about it!

Medical Radiography Quiz Questions - Quiz

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  • 2. 

    To avoid exposure to secondary radiation, the operator should stand

    • At least 6 feet from xray head

    • 2 feet to the right of primary beam

    • Any distance in back of xray head

    • 4 feet in front of the patient

    Correct Answer
    A. At least 6 feet from xray head
    Explanation
    To avoid exposure to secondary radiation, the operator should stand at least 6 feet from the x-ray head. This distance ensures that the operator is outside the immediate vicinity of the primary beam, reducing the risk of direct exposure. Standing farther away from the x-ray head also minimizes the chances of exposure to scattered radiation, which can occur when the primary beam interacts with objects or surfaces in the surrounding area. By maintaining a safe distance, the operator can effectively protect themselves from unnecessary radiation exposure.

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  • 3. 

    The xray at the center of the xray beam is called the 

    • Photon ray

    • Central ray

    • Secondary beam

    • Restricted beam

    Correct Answer
    A. Central ray
    Explanation
    The x-ray at the center of the x-ray beam is called the central ray. This term refers to the primary x-ray beam that passes through the patient's body and is used to create the diagnostic image. The central ray is typically aligned with the area of interest to ensure accurate imaging and minimize radiation exposure to surrounding tissues. It is an essential component in producing high-quality x-ray images.

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  • 4. 

    Blurred films can result from

    • Old film

    • Movement of the patient

    • Increased kVp

    • Faulty xray unit

    Correct Answer
    A. Movement of the patient
    Explanation
    Blurred films can result from the movement of the patient during the x-ray procedure. When a patient moves, it causes the image to appear blurry because the x-ray machine captures the movement rather than a clear image of the body part being examined. This can happen if the patient is unable to stay still or if they are in pain or discomfort during the procedure. Patient movement is a common cause of blurred films and can affect the overall quality and accuracy of the x-ray image.

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  • 5. 

    The difference in density in various regions of a radiograph is called

    • Collimation

    • Contrast

    • Filtration

    • Definition

    Correct Answer
    A. Contrast
    Explanation
    Contrast refers to the difference in density between different regions of a radiograph. It is an important characteristic in radiology as it helps to distinguish between different structures and abnormalities. By adjusting the contrast, radiologists can enhance the visibility of certain structures and improve the diagnostic accuracy of the image. Collimation refers to the restriction of the x-ray beam, filtration refers to the removal of low-energy x-rays, and definition refers to the sharpness and clarity of the image.

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  • 6. 

    The most sensitive cells to ionizing radiation are

    • Bone cells

    • Muscle cells

    • Nerve cells

    • Reproductive cells

    Correct Answer
    A. Reproductive cells
    Explanation
    Reproductive cells, such as sperm and eggs, are the most sensitive to ionizing radiation because they undergo rapid division and have a high rate of cell turnover. Ionizing radiation can damage the DNA in these cells, leading to mutations and potentially causing infertility or genetic disorders in offspring. This sensitivity is due to the fact that reproductive cells are responsible for passing on genetic material to future generations, making them more vulnerable to the harmful effects of radiation.

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  • 7. 

    Scatter radiation is a type of 

    • Secondary radiation

    • Primary radiation

    • Stray radiation

    • Filtered radiation

    Correct Answer
    A. Secondary radiation
    Explanation
    Scatter radiation refers to the radiation that is deflected or scattered in different directions after interacting with an object or surface. It is called secondary radiation because it is produced as a result of the interaction of primary radiation with matter. Primary radiation, on the other hand, refers to the initial radiation that is emitted directly from a source. Stray radiation refers to any radiation that is not part of the intended beam and can include scatter radiation. Filtered radiation refers to radiation that has been selectively attenuated or removed by a filter. Therefore, the correct answer is secondary radiation.

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  • 8. 

    The portion of the target that is struck by electrons is called the 

    • Focal spot

    • Photon point

    • Principle point

    • End point

    Correct Answer
    A. Focal spot
    Explanation
    The correct answer is focal spot. The focal spot refers to the specific area on the target that is struck by electrons in imaging systems such as X-ray machines. This spot is responsible for producing the X-ray photons that are used for imaging. The size and shape of the focal spot can affect the resolution and quality of the resulting image.

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  • 9. 

    Film fog can occur if there is 

    • Extremely thick bone

    • A light leak in the dark room

    • Slow film

    • Reversal of the film

    Correct Answer
    A. A light leak in the dark room
    Explanation
    A light leak in the dark room can cause film fog. When there is a leak of light into the dark room, it can expose the film to unwanted light, leading to fogging. This can result in a loss of contrast and clarity in the developed film. It is important to have a light-tight dark room to prevent any light leaks and ensure proper film development.

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  • 10. 

    The cathode is a filament composed of

    • Tungsten

    • Silver

    • Copper

    • Aluminum

    Correct Answer
    A. Tungsten
    Explanation
    The cathode is a filament composed of tungsten. Tungsten is commonly used as the filament material in incandescent light bulbs and electron tubes because it has a high melting point and is a good conductor of electricity. Its high melting point allows it to withstand the high temperatures generated when an electric current passes through it, while its conductivity allows it to efficiently emit electrons when heated, enabling the cathode to function properly.

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  • 11. 

    Collimation of the primary beam

    • Decreases the exposure time

    • Restricts the size and shape of the xray beam

    • Makes the primary beam more difficult to connect

    • Dictates the contrast of the final radiograph

    Correct Answer
    A. Restricts the size and shape of the xray beam
    Explanation
    The correct answer is "restricts the size and shape of the x-ray beam." Collimation refers to the process of limiting the size and shape of the x-ray beam to the area of interest. By restricting the size and shape of the beam, unnecessary radiation exposure to the patient and surrounding areas is minimized. This helps to improve image quality by reducing scatter radiation and improving contrast. Additionally, collimation helps to ensure that only the desired anatomy is included in the final radiograph, making it easier for the radiologist to interpret the image.

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  • 12. 

    If a patient expresses concern about the hazard of radiation, the patient can be assured that

    • Only those films neccessary for proper diagnosis will be exposed

    • Automatic film processors will be used

    • The auxilary is wearing a safety monitor

    • The walls of the operatory are lead lined

    Correct Answer
    A. Only those films neccessary for proper diagnosis will be exposed
    Explanation
    The correct answer is that only those films necessary for proper diagnosis will be exposed. This assurance addresses the patient's concern about radiation hazards by indicating that the dentist will only take the minimum number of X-rays needed for an accurate diagnosis, minimizing the patient's exposure to radiation. This approach aligns with the principle of ALARA (As Low As Reasonably Achievable) in radiation safety, which aims to minimize radiation exposure while still obtaining necessary diagnostic information.

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  • 13. 

    The lead diaphragm determines the size and shape of the

    • Electron cloud

    • Film used

    • Xray beam

    • Filament

    Correct Answer
    A. Xray beam
    Explanation
    The lead diaphragm determines the size and shape of the x-ray beam. The diaphragm is used to limit the area that the x-ray beam covers, allowing for more precise targeting of the desired area. By adjusting the lead diaphragm, the size and shape of the x-ray beam can be controlled, which is important for obtaining clear and accurate x-ray images.

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  • 14. 

    The first sign of xray dermatitus is 

    • Alopecia

    • Erythema

    • Dry skin

    • Pain

    Correct Answer
    A. Erythema
    Explanation
    Erythema is the correct answer because it refers to redness or inflammation of the skin, which is one of the first signs of x-ray dermatitis. This condition occurs when the skin is exposed to high levels of radiation, leading to skin damage and various symptoms such as redness, swelling, and blistering. Alopecia, dry skin, and pain may also occur as the condition progresses, but erythema is typically the initial symptom.

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  • 15. 

    The amount of radiation a person recieves

    • Begins anew each day

    • Is cumulative only on the skin

    • Is cumulative in the entire body

    • Is not harmful in small doses

    Correct Answer
    A. Is cumulative in the entire body
    Explanation
    Radiation exposure is cumulative in the entire body, meaning that the effects of radiation build up over time and are not limited to just the skin. This means that even small doses of radiation can have harmful effects on the body if they accumulate over time. It is important to minimize radiation exposure to protect overall health and well-being.

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  • 16. 

    After each use the leaded apron must be 

    • Stored in a darkroom

    • Folded neatly and stored in the operatory

    • Draped over a support rod unfolded

    • Discarded for proper infection control

    Correct Answer
    A. Draped over a support rod unfolded
    Explanation
    The leaded apron must be draped over a support rod unfolded after each use to ensure its proper storage. This allows the apron to be easily accessible for future use and prevents any creases or folds that could damage the protective lead lining. Additionally, draping the apron over a support rod helps to maintain its shape and prevent any unnecessary wear and tear. Storing the apron in a darkroom or discarding it for infection control purposes would not be appropriate or necessary.

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  • 17. 

    The radiographic film is covered with an emulsion of 

    • Silver bromide crystals

    • Cellulose

    • Silver acetate

    • Potassium bromide

    Correct Answer
    A. Silver bromide crystals
    Explanation
    The radiographic film is covered with an emulsion of silver bromide crystals. This is because silver bromide is photosensitive and can be exposed to light to capture the image. When the film is exposed to X-rays, the silver bromide crystals react and create a latent image. This image can then be developed and fixed to produce a visible image on the film. Cellulose, silver acetate, and potassium bromide are not commonly used in radiographic films and do not have the same photosensitivity properties as silver bromide.

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  • 18. 

    The usual number of filmsin a complete dental radiographic survey is 

    • 10-12

    • 18-20

    • 24-26

    • 26-28

    Correct Answer
    A. 18-20
    Explanation
    A complete dental radiographic survey typically consists of taking X-rays of all the teeth in the mouth. This includes taking X-rays of both the upper and lower jaws, as well as different angles and positions of each tooth. The range of 18-20 films is considered the usual number for a complete survey, as it allows for adequate coverage of all the teeth and surrounding structures.

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  • 19. 

    Which of the follwoing is used to describe the blackness of an exposed radiograph?

    • Density

    • Detail

    • Darkness

    • Development

    Correct Answer
    A. Density
    Explanation
    Density is used to describe the blackness of an exposed radiograph. In radiography, density refers to the degree of darkening or blackness in an image. It is determined by the amount of radiation that reaches the film or image receptor during exposure. A high density indicates a darker image, while a low density indicates a lighter image. The density of a radiograph is influenced by factors such as exposure settings, processing techniques, and the thickness and composition of the tissue being imaged.

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  • 20. 

    The best type of xray to penetrate body tissue is 

    • Low frequency

    • Hard rays, short wavelengths

    • Long wavelength

    • Soft rays, long wavelengths

    Correct Answer
    A. Hard rays, short wavelengths
    Explanation
    X-rays are a form of electromagnetic radiation that can penetrate body tissues. The best type of X-ray to penetrate body tissue is hard rays with short wavelengths. Hard rays have higher energy and shorter wavelengths, allowing them to pass through body tissues more easily. Soft rays with long wavelengths have lower energy and are less effective at penetrating body tissues. Therefore, hard rays with short wavelengths are the most suitable for imaging and diagnosing conditions within the body.

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  • 21. 

    The operator must avoid  all of the following EXCEPT 

    • Stray radiation

    • Secondary radiation

    • Primary beam

    • Natural sunlight

    Correct Answer
    A. Natural sunlight
    Explanation
    The operator must avoid stray radiation, secondary radiation, and the primary beam to ensure safety and accuracy in their work. However, natural sunlight is not a concern in this context as it does not pose any direct risks or interference with the operator's tasks.

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  • 22. 

    If patient is reluctant to be radiographed, the auxillary should 

    • Refer patient to dental hygeniest

    • Reschedule the patient

    • Refer patient to xray laborator

    • Explain procedure thoroughly to patient

    Correct Answer
    A. Explain procedure thoroughly to patient
    Explanation
    When a patient is reluctant to be radiographed, the best course of action for the auxiliary is to explain the procedure thoroughly to the patient. By providing a clear and detailed explanation, the auxiliary can help alleviate any fears or concerns the patient may have, ultimately increasing their comfort and willingness to undergo the radiograph. This approach allows for better communication and patient education, ensuring that the patient understands the importance and benefits of the procedure. Referring the patient to a dental hygienist or rescheduling the appointment may not address the patient's reluctance, while referring them to an x-ray laboratory may not be necessary if the issue can be resolved through effective communication.

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  • 23. 

    Xrays are mose effectively stopped by

    • Copper

    • Glass

    • Lead

    • Tungsten

    Correct Answer
    A. Lead
    Explanation
    Lead is the correct answer because it is a dense material that effectively absorbs and blocks X-rays. Lead has a high atomic number, which means it has more electrons and a greater chance of interacting with X-ray photons, leading to their absorption. This property makes lead an ideal choice for shielding against X-rays in various applications such as medical imaging and radiation protection. Copper, glass, and tungsten are not as effective in stopping X-rays as lead.

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  • 24. 

    The most effective way to reduce gonadel exposure from xrays is to 

    • Increase kVps

    • Use a leaded lap apron

    • Increase vertical angulation

    • Use ultraspeed film

    Correct Answer
    A. Use a leaded lap apron
    Explanation
    Using a leaded lap apron is the most effective way to reduce gonadal exposure from x-rays. Lead is a dense material that can effectively block radiation, and by wearing a leaded apron over the lap area, the gonads can be shielded from the harmful effects of radiation. This is particularly important in medical imaging procedures where the pelvis or abdomen is being imaged, as these areas contain the reproductive organs. Increasing kVps or vertical angulation, as well as using ultraspeed film, do not directly address the issue of gonadal exposure and are not as effective as using a leaded apron.

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  • 25. 

    The best technique for reducing the radiation exposure to both patient and operator is the use of 

    • An automatic timer

    • Fast film

    • Thinner films

    • A thicker cellulose acetate base

    Correct Answer
    A. Fast film
    Explanation
    Using fast film is the best technique for reducing radiation exposure to both the patient and the operator. Fast film requires less exposure time to capture an image compared to slower films, which means less radiation is needed. This reduces the overall radiation dose received by the patient and also minimizes the amount of time the operator is exposed to radiation. Fast film is particularly beneficial in situations where quick image acquisition is necessary, such as in emergency cases or when dealing with restless or uncooperative patients.

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  • 26. 

    The periapical film reveals

    • Entire jaw

    • Upper and lower teeth in same film

    • Interproximal caries

    • The entire tooth, including apex

    Correct Answer
    A. The entire tooth, including apex
    Explanation
    The periapical film is a dental X-ray that provides a detailed image of a specific tooth and its surrounding structures. It captures the entire tooth, including the apex, which is the tip of the root. This allows dentists to assess the condition of the tooth, detect any abnormalities or pathology, and determine the need for treatment. The film does not show the entire jaw or both upper and lower teeth in the same image. It is specifically designed to focus on a single tooth and provide a close-up view.

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  • 27. 

    To increase the penetrating power of an xray beam, the auxiliary must

    • Increase KvP

    • Decrease KvP

    • Increase mA

    • Increase FFD

    Correct Answer
    A. Increase KvP
    Explanation
    Increasing the Kilovoltage Peak (KvP) in an x-ray beam increases the penetrating power of the beam. KvP determines the energy of the x-ray photons produced, and higher energy photons can penetrate through denser tissues more effectively. Therefore, increasing KvP allows the x-ray beam to pass through the patient's body more easily, resulting in better image quality and diagnostic accuracy.

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  • 28. 

    Accumulated radiation dosage for those who work with radiation may not exceed

    • 0.1 rem/week

    • 1 rem/week

    • 10 rem/week

    • 100 rem/week

    Correct Answer
    A. 0.1 rem/week
    Explanation
    The accumulated radiation dosage for those who work with radiation should not exceed 0.1 rem/week. This limit is set to ensure the safety of individuals who are exposed to radiation regularly. Higher levels of radiation can have harmful effects on the body, including an increased risk of cancer and other health problems. Therefore, it is important to adhere to the recommended limit of 0.1 rem/week to minimize the potential risks associated with radiation exposure.

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  • 29. 

    The detection of interproximal carries is best seen by a 

    • Occlusal film

    • Panorex film

    • Bite-wing film

    • Lateral head plate

    Correct Answer
    A. Bite-wing film
    Explanation
    The detection of interproximal caries is best seen by a bite-wing film. Bite-wing films are specifically designed to capture the areas between the teeth, making them ideal for detecting caries in these interproximal spaces. This type of film allows for a clear and detailed view of the tooth surfaces, enabling dentists to identify any signs of decay or cavities that may be present. The other options, such as occlusal film, panorex film, and lateral head plate, are not as effective in visualizing interproximal caries.

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  • 30. 

    The basic principle of bisenting the angle technique is 

    • Central ray must be directed at right angle to the tooth

    • Central ray must be directed at right angle to the film

    • Central ray must be directed at right angle to the imaginary line that bisects the angle formed by the long axis of the tooth and the plane of the film

    • Central ray must be directed at 45 degree angle to the embrasures

    Correct Answer
    A. Central ray must be directed at right angle to the imaginary line that bisects the angle formed by the long axis of the tooth and the plane of the film
    Explanation
    The correct answer is "central ray must be directed at right angle to the imaginary line that bisects the angle formed by the long axis of the tooth and the plane of the film." This principle is important in bisecting angle technique because it ensures that the central ray is directed accurately to capture the image of the tooth on the film. By bisecting the angle formed by the long axis of the tooth and the plane of the film, the central ray is aligned properly to capture the tooth's image without distortion or overlapping. This technique helps in obtaining clear and accurate radiographic images for diagnosis and treatment planning.

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  • 31. 

    If the end of the xray cone approximates the tip of the patients nose, the operator is exposing a radiograph of the

    • Maxillary cuspid

    • Maxillary central incisors

    • Mandibular incisors

    • Maxillary bicuspid

    Correct Answer
    A. Maxillary central incisors
    Explanation
    If the end of the x-ray cone approximates the tip of the patient's nose, it means that the x-ray is focused on the upper front teeth. The maxillary central incisors are the two front teeth in the upper jaw, so they would be the teeth exposed in the radiograph.

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  • 32. 

    A material or substance that does stop or absorb xrays is known as 

    • Radiographic

    • Radiopaque

    • Radiolucent

    • Radiodontic

    Correct Answer
    A. Radiopaque
    Explanation
    Radiopaque is the correct answer because it refers to a material or substance that does stop or absorb X-rays. When X-rays pass through the body, radiopaque substances appear white on the X-ray image, allowing for the visualization of structures such as bones or dental fillings. This property is useful in medical imaging as it helps in identifying abnormalities or fractures in bones and detecting dental issues. Radiographic, radiolucent, and radiodontic are incorrect options as they do not accurately describe the property of stopping or absorbing X-rays.

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  • 33. 

    The raised button on the radiograph aids in 

    • Determining film speed

    • Processing

    • Drying

    • Mounting

    Correct Answer
    A. Mounting
    Explanation
    The raised button on the radiograph aids in mounting. This is because the raised button provides a point of reference for aligning the radiograph correctly in the mounting process. Mounting involves attaching the radiograph securely to a backing board or film mount to ensure it remains in place and can be easily viewed and interpreted. The raised button helps to ensure that the radiograph is positioned accurately and consistently during the mounting process.

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  • 34. 

    Exposure of a radiograph on a child

    • Requires less time than an adult

    • Requires more time than an adult

    • Requires same time as an adult

    • Should never be attempted

    Correct Answer
    A. Requires less time than an adult
    Explanation
    The exposure of a radiograph on a child requires less time than an adult because children have smaller body sizes and less dense tissues compared to adults. This means that less time is needed for the X-rays to penetrate through the child's body and create a clear image on the radiograph. Additionally, children are usually more cooperative and less likely to move during the procedure, further reducing the time needed for exposure.

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  • 35. 

    Black lines across the film may be the result of 

    • Double exposure

    • Cone cutting

    • Underexposure

    • Excessive bending

    Correct Answer
    A. Excessive bending
    Explanation
    Excessive bending can cause black lines across the film because it puts pressure on the film and can cause damage or distortion to the image. When the film is bent too much, it can result in the emulsion layer cracking or separating, leading to black lines appearing on the film. This can happen if the film is mishandled or if it is stored or transported in a way that causes it to bend excessively.

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  • 36. 

    Two films are developed for the same length of time but at different temperatures.  The film developed at the higher temperature will be

    • Lighter

    • Darker

    • The same

    • Clear

    Correct Answer
    A. Darker
    Explanation
    When film is developed at a higher temperature, it tends to develop faster and the image appears darker. This is because higher temperature increases the rate of chemical reactions, causing the silver halide crystals in the film to be more fully exposed and developed. As a result, the film developed at the higher temperature will have a darker appearance compared to the film developed at a lower temperature.

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  • 37. 

    The quality, or penetrating power, of secondary radiation is 

    • More than that of primary radiation

    • Less than that of primary radiation

    • The same as that of primary radiation

    • Unrelated to that of primary radiation

    Correct Answer
    A. Less than that of primary radiation
    Explanation
    Secondary radiation refers to the radiation that is produced as a result of the interaction between primary radiation and matter. It can be in the form of scattered or secondary X-rays, or other types of radiation. The penetrating power of radiation refers to its ability to pass through matter. Primary radiation, which is the initial radiation emitted from a source, generally has higher energy and therefore greater penetrating power compared to secondary radiation. Therefore, the correct answer is that the quality or penetrating power of secondary radiation is less than that of primary radiation.

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  • 38. 

    In the paralleling technique, a device used to hold the film in the patients mouth is

    • A film holder

    • A plastic dental instrument

    • Patients finger

    • Rubber bite block

    Correct Answer
    A. A film holder
    Explanation
    The correct answer is a film holder. In the paralleling technique, a film holder is used to hold the dental film in the patient's mouth. This device ensures that the film remains stable and in the correct position during the dental X-ray procedure. It helps to achieve accurate and clear images by minimizing movement and ensuring proper alignment of the film with the X-ray beam. A film holder is specifically designed for this purpose and is commonly used in dental radiography.

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  • 39. 

    When exposing the patient to only one periapical radiograph, the auxillary

    • May diagnose the film

    • Must enter this procedure in the dental chart

    • May take as many retakes as needed

    • Does not need to use the lead apron on the patiend

    Correct Answer
    A. Must enter this procedure in the dental chart
    Explanation
    The correct answer is "must enter this procedure in the dental chart." When exposing the patient to a periapical radiograph, it is important for the auxiliary to document this procedure in the dental chart. This helps in maintaining accurate and complete patient records, allowing for proper diagnosis and treatment planning. It also serves as a reference for future dental visits and ensures continuity of care.

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  • 40. 

    Cephalometric radiographs are used in which area of dentistry

    • Operative

    • Pedodontics

    • Orthodontics

    • Periodontics

    Correct Answer
    A. Orthodontics
    Explanation
    Cephalometric radiographs are used in orthodontics. These radiographs provide a detailed view of the patient's head and skull, allowing orthodontists to analyze the relationship between the teeth, jaws, and facial structures. This information is essential for planning and monitoring orthodontic treatment, including the alignment and positioning of teeth, the correction of bite abnormalities, and the evaluation of growth and development. Cephalometric radiographs are an important tool in orthodontics for diagnosing and creating treatment plans for patients.

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  • 41. 

    Extraoral films are placed in rigid frames called

    • Film frames

    • Skull plates

    • Jaw plates

    • Cassettes

    Correct Answer
    A. Cassettes
    Explanation
    Extraoral films are larger-sized dental X-ray films that are used to capture images of the entire skull or jaw. These films need to be held in place securely during the X-ray procedure to ensure accurate and clear images. Cassettes are rigid frames that are specifically designed to hold extraoral films in place. They provide stability and prevent any movement or distortion of the film during exposure, resulting in high-quality diagnostic images. Therefore, cassettes are the correct answer for this question.

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  • 42. 

    Proper collimation for the film size and target-film distance will 

    • Increase the wavelength

    • Decrease the wavelength

    • Increase the kvp

    • Decrease radiation recieved by the patient

    Correct Answer
    A. Decrease radiation recieved by the patient
    Explanation
    Proper collimation for the film size and target-film distance will decrease the radiation received by the patient. Collimation refers to the process of restricting the size of the X-ray beam to the area of interest. By properly collimating the X-ray beam, unnecessary radiation exposure to the patient's body can be minimized. This helps to ensure that only the necessary area is exposed to radiation, reducing the overall radiation dose received by the patient.

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  • 43. 

    The developing solution

    • Should always be left open

    • Should be partially covered

    • Should always be covered

    • Should be covered omly when films are being developed

    Correct Answer
    A. Should always be covered
    Explanation
    The correct answer is "should always be covered." This is because when developing a solution, it is important to prevent any contamination or exposure to external elements that could alter or damage the solution. By keeping the solution covered at all times, it ensures that it remains pure and unaffected, allowing for accurate and reliable results during the development process.

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  • 44. 

    The time period between the effects of cumulative radiation and visible tissue damage is the 

    • Short-term period

    • Acute effect period

    • Latent period

    • Long-term period

    Correct Answer
    A. Latent period
    Explanation
    The latent period refers to the time period between the effects of cumulative radiation and visible tissue damage. During this period, there may not be any immediate symptoms or visible signs of damage. It is called the latent period because the effects of radiation exposure are not immediately apparent and may take some time to manifest. This period can vary depending on the dose of radiation received and the specific tissues or organs affected.

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  • 45. 

    Which of these is not a factor when considering what size film to use?

    • Patients age

    • The size of mouth opening

    • Shape of patients dental arches

    • Patients previous radiation exposure

    Correct Answer
    A. Patients previous radiation exposure
    Explanation
    When considering what size film to use, factors such as the patient's age, the size of their mouth opening, and the shape of their dental arches are important considerations. However, the patient's previous radiation exposure is not a factor that influences the choice of film size. This is because the previous radiation exposure does not directly affect the size of the film needed for dental imaging.

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  • 46. 

    The temperature of the radiographic processing solutions is adjusted by

    • Individual heaters

    • Chemical interaction

    • A temperature- adjustable waterbath

    • Gas heaters

    Correct Answer
    A. A temperature- adjustable waterbath
    Explanation
    The temperature of the radiographic processing solutions is adjusted by a temperature-adjustable waterbath. This is because a waterbath provides a controlled and consistent temperature environment for the solutions. By adjusting the temperature of the water in the waterbath, the temperature of the solutions can be easily regulated. This ensures that the solutions are maintained at the optimal temperature for efficient processing of radiographic films.

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  • 47. 

    The best way to dry processed film manually is to

    • Place films on a flat counter top with towels

    • Use the air syringe from the dental unit

    • Hang the films over the heat sterilizer

    • Hang film racks in the dark room carefully so as not to allow wet films to contact each other

    Correct Answer
    A. Hang film racks in the dark room carefully so as not to allow wet films to contact each other
    Explanation
    Hanging film racks in the dark room is the best way to dry processed film manually because it allows the films to dry evenly and prevents them from sticking together. Placing films on a flat counter top with towels or using an air syringe from the dental unit may not provide proper air circulation for drying, and hanging the films over the heat sterilizer can cause damage to the film. Hanging the film racks in the dark room ensures that the films are protected from light and allows for proper drying without any risk of contact between wet films.

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  • 48. 

    The optimum time-temperature relationship for processing dental radiographs is

    • 74 degree F for 4 1/2 minutes

    • 68 degrees F for 4 1/2 minutes

    • 50 degrees F for 5 minutes

    • 70 degrees F for 6 minutes

    Correct Answer
    A. 68 degrees F for 4 1/2 minutes
    Explanation
    The optimum time-temperature relationship for processing dental radiographs is 68 degrees F for 4 1/2 minutes. This temperature and duration provide the ideal conditions for developing the radiographs without over or under-processing them. It ensures that the images are properly developed, allowing for accurate diagnosis and treatment planning in dentistry.

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  • 49. 

    Which extraoral film is used to visualize the sinus?

    • Waters film

    • Lateral skull film

    • Occlusal film

    • Posterior-anterior film

    Correct Answer
    A. Waters film
    Explanation
    The Waters film is used to visualize the sinus. The Waters view is an extraoral radiographic technique that provides a lateral view of the maxillary sinuses. It is commonly used in dentistry to assess the sinuses for signs of infection, inflammation, or other abnormalities. This technique involves placing the film under the patient's nose and angling the X-ray beam towards the forehead. This allows for a clear visualization of the maxillary sinuses and helps in diagnosing sinus-related issues.

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Quiz Review Timeline (Updated): Jul 25, 2024 +

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  • Current Version
  • Jul 25, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 11, 2012
    Quiz Created by
    Sarahann325

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