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ARRT Sonography study materials
ARRT Sonography study resources

ARRT Sonography practice questions

One question at a time. Build your ARRT Sonography understanding.

First 50 of 200 questions. Each one lists the choices, the correct answer, and an explanation. The checker at the top of this page saves progress in this browser when it is available.

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Question 1Patient Care and Safety

Before beginning an ultrasound examination, what is the most reliable way to identify the patient?

  1. Match two identifiers to the order Correct answer.
  2. Ask the patient to state their room number
  3. Confirm identity using the bed assignment
  4. Check the surname on the wristband alone

Explanation

The two-identifier rule requires matching at least two independent identifiers, such as name and date of birth, to the order before every examination. Room or bed assignment can change and is not a reliable identifier.

Question 2Patient Care and Safety

When should a sonographer perform hand hygiene during patient care?

  1. Before and after each patient contact Correct answer.
  2. Only after removing gloves
  3. At the start of the shift only
  4. Only when hands are visibly soiled with blood

Explanation

Hand hygiene is performed before and after every patient contact and after glove removal. Visibly soiled hands require soap and water, but an alcohol-based rub is acceptable when hands are not visibly soiled.

Question 3Patient Care and Safety

When are gloves required during an ultrasound examination?

  1. A mask is required whenever entering any patient room
  2. Gloves replace the need for hand hygiene
  3. A gown is required for every ultrasound examination
  4. Gloves are worn when contact with body fluids is likely Correct answer.

Explanation

Gloves are indicated when contact with blood, body fluids, mucous membranes, or nonintact skin is anticipated. Gloves do not replace hand hygiene and are removed after the task.

Question 4Patient Care and Safety

Which element is essential for valid informed consent?

  1. A witness signature from a family member
  2. Risks, benefits, and alternatives discussed Correct answer.
  3. A verbal promise that the examination is painless
  4. A signature from the patient's insurance provider

Explanation

Informed consent requires that the patient receive and understand the nature of the procedure, its risks and benefits, and reasonable alternatives. A signature alone without this discussion is not valid consent.

Question 5Patient Care and Safety

Which adult resting heart rate is within the normal range?

  1. 72 beats per minute Correct answer.
  2. 140 beats per minute
  3. 118 beats per minute
  4. 38 beats per minute

Explanation

A normal adult resting heart rate is approximately 60 to 100 beats per minute. Rates below 60 indicate bradycardia and rates above 100 indicate tachycardia.

Question 6Patient Care and Safety

In the RACE fire response sequence, what does the letter R represent?

  1. Run
  2. Report
  3. Remove equipment
  4. Rescue Correct answer.

Explanation

RACE stands for Rescue, Alarm, Confine, and Evacuate or Extinguish. The first priority is to rescue anyone in immediate danger.

Question 7Patient Care and Safety

A patient reports a known latex allergy. What is the appropriate action?

  1. Wear latex gloves but double them
  2. Place the patient in a negative-pressure room
  3. Cancel the examination permanently
  4. Use latex-free gloves and supplies Correct answer.

Explanation

Latex-free gloves and supplies are used for any patient with a known or suspected latex allergy. A negative-pressure room is for airborne precautions, not latex allergy.

Question 8Patient Care and Safety

Which practice best reduces the sonographer's risk of a work-related musculoskeletal injury?

  1. Adjust the bed height and keep the wrist neutral Correct answer.
  2. Work with the wrist fully flexed
  3. Reach across the patient whenever possible
  4. Hold the transducer with a tight grip at all times

Explanation

Work-related musculoskeletal disorders are reduced by proper bed height, neutral wrist posture, and avoiding prolonged static grips. Reaching and awkward wrist positions increase strain.

Question 9Patient Care and Safety

How do standard precautions apply in the ultrasound department?

  1. They apply to every patient Correct answer.
  2. They are used only in the operating room
  3. They replace transmission-based precautions
  4. They apply only to patients with known infections

Explanation

Standard precautions are applied to every patient because bloodborne pathogens can be present without a known diagnosis. Transmission-based precautions are added when a specific route is suspected.

Question 10Patient Care and Safety

Which action helps maintain a sterile field during a procedure?

  1. Turn away from the field to answer a phone
  2. Set sterile items on a damp drape
  3. Reach over the sterile field to pass a cable
  4. Keep field in view above waist level Correct answer.

Explanation

A sterile field must be kept in view and above waist level; items below waist level or out of view are considered contaminated. Reaching over the field or turning away also breaks sterility.

Question 11Patient Care and Safety

Which precaution is required for a patient on droplet precautions?

  1. No PPE if the patient is afebrile
  2. An N95 respirator for every contact
  3. A negative-pressure room at all times
  4. A mask when within 3 to 6 feet Correct answer.

Explanation

Droplet precautions require a surgical mask when working within about 3 to 6 feet of the patient. N95 respirators and negative-pressure rooms are used for airborne precautions.

Question 12Patient Care and Safety

What should be done before moving a patient from a bed to a chair?

  1. Lock the wheels and lower the bed Correct answer.
  2. Pull the patient by the arms
  3. Raise the bed to the highest position
  4. Ask the patient to stand without assistance

Explanation

Before any transfer, lock the wheels and lower the bed to a safe height to prevent sliding or falls. Lifting or pulling by the arms can injure both the patient and the sonographer.

Question 13Patient Care and Safety

Which approach best prepares a young child for an ultrasound examination?

  1. Tell the child the examination will not hurt at all
  2. Use simple words and show the transducer Correct answer.
  3. Speak only to the parent and ignore the child
  4. Promise a reward if the child stays still

Explanation

Children respond best to simple explanations, a calm voice, and a chance to see or touch the equipment. False promises or excluding the child can increase fear and reduce cooperation.

Question 14Patient Care and Safety

Which adjustment is most appropriate for an older adult with thin, fragile skin?

  1. Use gentle pressure and pad bony areas Correct answer.
  2. Keep the room cool to prevent sweating
  3. Avoid explaining the procedure to save time
  4. Apply firm pressure to shorten the examination

Explanation

Older adults often have fragile skin and prominent bony areas, so gentle pressure and padding reduce the risk of injury. A warm room and clear explanations also improve comfort and cooperation.

Question 15Patient Care and Safety

Which principle guides acoustic output during obstetric ultrasound?

  1. Use the lowest output for the shortest time Correct answer.
  2. Increase output to finish the examination faster
  3. Use Doppler for the entire examination
  4. Scan the fetus continuously for 30 minutes

Explanation

The ALARA principle applies to diagnostic ultrasound: use the lowest output and shortest exposure time needed for diagnosis. Doppler and prolonged continuous scanning increase energy exposure.

Question 16Patient Care and Safety

Which action protects patient privacy under confidentiality regulations?

  1. Discuss the case only with the care team Correct answer.
  2. Leave the monitor visible in a public hallway
  3. Discuss the case in a crowded elevator
  4. Post the patient's images on social media

Explanation

Patient information may be shared only with those directly involved in the patient's care. Discussing cases in public areas or posting images violates privacy regulations.

Question 17Patient Care and Safety

After a patient falls in the ultrasound department, what is the appropriate action?

  1. Wait until the end of the week to report it
  2. Document facts objectively in a report Correct answer.
  3. Change the record to show no fall occurred
  4. Blame the patient in the medical record

Explanation

An incident report documents the facts of an event objectively and is filed according to facility policy. The medical record should contain factual clinical documentation, not blame or alteration.

Question 18Patient Care and Safety

Which practice supports electrical safety in the ultrasound department?

  1. Inspect cords and plugs before use Correct answer.
  2. Remove the ground prong from a plug
  3. Overload a single outlet with adapters
  4. Use equipment with a frayed power cord

Explanation

Electrical equipment should be inspected for frayed cords, damaged plugs, and missing ground prongs before use. Overloading outlets and bypassing grounding increase the risk of shock and fire.

Question 19Patient Care and Safety

What level of reprocessing is required for an endocavitary transducer between patients?

  1. Wipe with a dry paper towel only
  2. Rinse with alcohol and store wet
  3. Soak in tap water for one minute
  4. High-level disinfection after each use Correct answer.

Explanation

Endocavitary transducers contact mucous membranes and require high-level disinfection between patients. A dry wipe or tap-water rinse does not provide the required level of disinfection.

Question 20Patient Care and Safety

Before administering an ultrasound contrast agent, which action is most important?

  1. Verify allergies and the medication order Correct answer.
  2. Rely on the previous shift's notes alone
  3. Give the drug quickly to save time
  4. Assume the patient has no allergies

Explanation

Before administering any medication or contrast agent, verify the patient's allergies and the order against the five rights. Assuming no allergies or relying on prior notes can cause a preventable reaction.

Question 21Patient Care and Safety

What does an elevated thermal index indicate during an ultrasound examination?

  1. A lower acoustic output
  2. A higher risk of electrical shock
  3. An increased risk of infection
  4. A greater potential for tissue heating Correct answer.

Explanation

The thermal index estimates the potential for temperature rise from absorbed acoustic energy; a higher TI means greater heating potential. The mechanical index relates to cavitation risk, not shock or infection.

Question 22Patient Care and Safety

Why must an endocavitary probe receive high-level disinfection rather than simple cleaning?

  1. They are sterilized by ultraviolet light
  2. They contact mucous membranes Correct answer.
  3. They never contact body fluids
  4. They only touch intact skin

Explanation

Endocavitary probes contact mucous membranes, which are nonintact surfaces, so they must be free of pathogens after use. High-level disinfection is required because sterilization is usually not necessary or practical.

Question 23Patient Care and Safety

A patient with an implanted cardiac pacemaker is scheduled for an abdominal ultrasound. What approach is appropriate?

  1. Use only continuous-wave Doppler over the device
  2. The examination is absolutely contraindicated
  3. The pacemaker must be turned off first
  4. Avoid prolonged scanning directly over the device Correct answer.

Explanation

Diagnostic ultrasound is generally considered safe in patients with implanted cardiac devices, but prolonged or direct exposure over the generator should be avoided. Turning off a pacemaker is not a sonographer's role and is not routine.

Question 24Patient Care and Safety

During an examination, a patient becomes pale, diaphoretic, and dizzy. What is the first action?

  1. Stop and lay the patient supine Correct answer.
  2. Continue the examination quickly
  3. Ask the patient to walk to the waiting room
  4. Place the patient in a seated position

Explanation

Pallor, diaphoresis, and dizziness suggest syncope or hypotension; stop the examination and lay the patient supine with legs elevated to improve venous return. Continuing or making the patient walk increases the risk of a fall.

Question 25Patient Care and Safety

A physician asks a sonographer to perform a procedure outside the sonographer's defined scope of practice. What is the appropriate response?

  1. Perform the task because a physician asked
  2. Ignore the request without documentation
  3. Practice within scope and notify a supervisor Correct answer.
  4. Ask a student to perform the task instead

Explanation

Sonographers must practice within their defined scope and escalate requests that exceed it to a supervisor. Performing an out-of-scope task because someone asked does not make it acceptable.

Question 26Patient Care and Safety

Which practice is the single most effective measure for preventing the spread of healthcare-associated organisms during ultrasound examinations?

  1. Changing the linens on the examination table between patients
  2. Performing hand hygiene before and after every patient contact Correct answer.
  3. Cleaning the transducer with a wipe after each examination
  4. Wearing gloves for every patient encounter

Explanation

Hand hygiene is the primary means of interrupting contact transmission and is required before and after every patient encounter as well as after glove removal. Gloves, equipment cleaning, and fresh linens are adjuncts that do not replace it.

Question 27Patient Care and Safety

Immediately before starting an examination, how should the sonographer confirm the patient's identity?

  1. Verifying two independent identifiers, such as full name and date of birth Correct answer.
  2. Relying on the identification band alone without speaking to the patient
  3. Checking the requisition against the patient's stated name only
  4. Asking the patient to confirm the room number and the ordering provider's name

Explanation

Patient identification requires at least two independent identifiers that are actively confirmed with the patient or a representative, plus a match to the request and the identification band. A single identifier or a passive check of the band alone is not sufficient.

Question 28Patient Care and Safety

When removing personal protective equipment after an examination, which item should be removed first?

  1. Gloves Correct answer.
  2. Respirator
  3. Face shield
  4. Gown

Explanation

Doffing proceeds from the most to the least contaminated item: gloves first, then eye or face protection, then the gown, and finally the mask or respirator, with hand hygiene afterward. Removing gloves first limits transfer of organisms to the face and to other equipment.

Question 29Patient Care and Safety

A patient is placed on contact precautions for a resistant organism. Which personal protective equipment is required for a routine abdominal ultrasound?

  1. A surgical mask and eye protection during close contact
  2. No protective equipment, provided the patient's skin is intact
  3. Clean gloves and a fluid-resistant gown for any patient contact Correct answer.
  4. A fit-tested N95 respirator and a negative-pressure room

Explanation

Contact precautions are designed to interrupt direct and indirect contact transmission, so gloves and a gown are worn for every contact with the patient or the patient's environment. Respiratory protection belongs to droplet and airborne precautions.

Question 30Patient Care and Safety

Which precautions are appropriate for a patient with suspected pulmonary tuberculosis who needs an ultrasound examination?

  1. Standard precautions with no additional respiratory protection
  2. Airborne precautions with a fit-tested N95 respirator Correct answer.
  3. Contact precautions with gloves and a gown on entering the room
  4. Droplet precautions with a surgical mask worn within three feet

Explanation

Tuberculosis is transmitted by airborne droplet nuclei that remain suspended in air, so airborne precautions with a fit-tested respirator are required and the examination is usually performed in a negative-pressure room. Surgical masks and gowns alone do not filter these small particles.

Question 31Patient Care and Safety

A sonographer sustains a needlestick from a contaminated needle during a procedure. What is the first action?

  1. Cover the wound and finish the scheduled examination before reporting
  2. Squeeze the puncture site firmly to express blood, then apply a bandage
  3. Obtain the patient's bloodborne pathogen results before leaving the room
  4. Wash the site with soap and water and report the exposure promptly Correct answer.

Explanation

Immediate care is to wash the exposed site thoroughly with soap and water, then report the exposure without delay so post-exposure evaluation and prophylaxis can be started. Wound care and reporting occur before any attempt to determine the source patient's status.

Question 32Patient Care and Safety

How should a used needle be handled after an ultrasound-guided procedure?

  1. Placed in a red biohazard bag along with used gel packets
  2. Recapped and placed in the regular trash in the examination room
  3. Placed in a sealed specimen bag for transport to the laboratory
  4. Placed directly in a rigid, puncture-resistant sharps container at the point of use Correct answer.

Explanation

Used sharps go immediately into a closable, puncture-resistant sharps container located close to where they were used, without recapping or bending. Biohazard bags and specimen bags offer no protection against puncture injuries.

Question 33Patient Care and Safety

During a Doppler examination, the displayed mechanical index is 1.9. What does this value most directly indicate?

  1. A higher acoustic frequency than the transducer is rated for
  2. An increased risk of tissue heating at the transducer face
  3. A reduction in the amount of coupling gel required
  4. A greater potential for cavitation in the insonated tissue Correct answer.

Explanation

The mechanical index estimates the likelihood of nonthermal bioeffects, mainly cavitation, and rises as peak negative pressure increases or frequency decreases. Tissue heating is estimated separately by the thermal index.

Question 34Patient Care and Safety

A woman in her third trimester becomes lightheaded and hypotensive during a supine abdominal scan. What is the most appropriate immediate action?

  1. Elevate the legs while keeping the patient flat and continue scanning
  2. Ask the patient to breathe deeply and complete the examination quickly
  3. Sit the patient upright and give oral fluids before resuming
  4. Reposition the patient into a left lateral tilt or left lateral position Correct answer.

Explanation

A gravid uterus can compress the inferior vena cava when the patient lies supine, reducing venous return and causing supine hypotensive syndrome. Turning the patient to the left side or placing a wedge under the right hip relieves the compression and restores cardiac output.

Question 35Patient Care and Safety

Which instruction should be given to a patient scheduled for a transabdominal pelvic ultrasound?

  1. Empty the bladder completely just before the examination
  2. Fast for eight hours and avoid all fluids before the appointment
  3. Follow a clear-liquid diet for 24 hours before the appointment
  4. Drink water and arrive with a comfortably full bladder Correct answer.

Explanation

A distended urinary bladder acts as an acoustic window and displaces bowel loops away from the pelvis, so the patient should finish drinking water about an hour before the study. Fasting is not required and an empty bladder degrades the image.

Question 36Patient Care and Safety

A patient with limited English proficiency does not understand the explanation of the examination. What is the best approach?

  1. Ask an adult family member to interpret the examination instructions
  2. Provide written English instructions and proceed with the study
  3. Arrange a qualified medical interpreter in person or by telephone Correct answer.
  4. Speak more slowly and use gestures to convey the information

Explanation

Effective communication and informed consent require a qualified medical interpreter, either in person or through a telephone or video service, so that information is conveyed accurately and confidentially. Untrained interpreters risk errors and omitting key information.

Question 37Patient Care and Safety

A patient begins to have a generalized tonic-clonic seizure during an ultrasound examination. What is the appropriate action?

  1. Restrain the arms and legs until the convulsive movements stop
  2. Protect the patient from injury and avoid restraining the limbs Correct answer.
  3. Leave the patient unattended to summon the physician
  4. Place a padded tongue blade between the teeth to protect the airway

Explanation

During a seizure the priorities are to prevent injury by cushioning the head, moving hazards away, and allowing the movements to run their course while monitoring the airway. Nothing is inserted into the mouth, the limbs are not restrained, and the patient is never left alone.

Question 38Patient Care and Safety

Which compression rate is recommended when performing CPR on an adult?

  1. 80 to 100 compressions per minute
  2. 60 to 80 compressions per minute
  3. 100 to 120 compressions per minute Correct answer.
  4. 130 to 150 compressions per minute

Explanation

Current resuscitation guidelines recommend a compression rate of 100 to 120 per minute with a depth of about 5 cm in adults, allowing full chest recoil between compressions. Rates outside this range reduce the effectiveness of circulation.

Question 39Patient Care and Safety

A patient slips off the examination table and sustains a small abrasion. Which documentation practice is correct?

  1. Record a conclusion that the incident clearly resulted from staff negligence
  2. Document only that a completed incident report was placed in the file
  3. Omit the event from the medical record because a separate report will be filed
  4. Chart an objective description of the event and the care given Correct answer.

Explanation

The medical record should contain a factual, objective account of what happened, the patient's condition, and the interventions provided. Incident reports are administrative documents used for quality improvement and do not replace charting.

Question 40Patient Care and Safety

While scanning, a sonographer sees a finding that looks highly suspicious for malignancy, and the patient asks what it means. What is the appropriate response?

  1. Decline to answer and leave the room without further explanation
  2. Describe the suspicious appearance in detail so the patient understands the concern
  3. State that the examination looks normal to avoid causing unnecessary worry
  4. Explain that the physician will review the images and discuss the results with the patient Correct answer.

Explanation

Sonographers acquire and document images but do not render diagnoses; findings are communicated to the interpreting physician, who discusses results with the patient. This protects the patient from incomplete or inaccurate information and keeps communication within professional scope.

Question 41Physics and Instrumentation

A transducer operates at a frequency of 5 MHz. What is the period of the sound wave it produces?

  1. 5.0 µs
  2. 0.5 µs
  3. 2.0 µs
  4. 0.2 µs Correct answer.

Explanation

Period is the reciprocal of frequency, so period = 1 ÷ 5,000,000 Hz = 0.0000002 s, or 0.2 µs. Period and frequency are inversely related for any wave.

Question 42Physics and Instrumentation

The propagation speed of ultrasound in a medium is determined primarily by which pair of properties?

  1. Stiffness and density Correct answer.
  2. Intensity and power
  3. Frequency and amplitude
  4. Pulse repetition frequency and duty factor

Explanation

Propagation speed is set by the medium itself, specifically by its stiffness (bulk modulus) and its density. Higher stiffness speeds sound up, while higher density slows it down. Frequency, amplitude, and instrument settings do not change the speed of sound in a given medium.

Question 43Physics and Instrumentation

Diagnostic ultrasound is best described as which type of wave?

  1. Electromagnetic longitudinal
  2. Electromagnetic transverse
  3. Mechanical transverse
  4. Mechanical longitudinal Correct answer.

Explanation

Sound is a mechanical wave, so it requires a medium, and in tissue the particles oscillate parallel to the direction of travel, making it longitudinal. Electromagnetic waves such as x-rays are transverse and do not require a medium.

Question 44Physics and Instrumentation

Which material is most commonly used as the active piezoelectric element in diagnostic ultrasound transducers?

  1. Barium sulfate
  2. Lead zirconate titanate Correct answer.
  3. Silver nitrate
  4. Quartz glass

Explanation

Lead zirconate titanate, abbreviated PZT, is a ferroelectric ceramic that converts electrical energy to mechanical energy and back with high efficiency. It is the standard active element in modern imaging transducers.

Question 45Physics and Instrumentation

Attenuation of ultrasound in tissue is expressed in which unit?

  1. Hertz
  2. Watt per square centimeter
  3. Pascal
  4. Decibel Correct answer.

Explanation

Attenuation is a relative loss of intensity and is reported on a logarithmic scale in decibels. One decibel represents a ratio, so attenuation is described as so many dB per centimeter or per centimeter per megahertz.

Question 46Physics and Instrumentation

Axial resolution is determined primarily by which factor?

  1. Line density
  2. Beam width at the focal zone
  3. Frame rate
  4. Spatial pulse length Correct answer.

Explanation

Axial resolution equals one-half the spatial pulse length, so shorter pulses yield better resolution along the beam axis. Higher frequency and fewer cycles per pulse both shorten the pulse.

Question 47Physics and Instrumentation

What is the primary purpose of time-gain compensation?

  1. Increasing transmit power at depth
  2. Reducing the number of scan lines
  3. Compensating for attenuation as depth increases Correct answer.
  4. Removing Doppler shift from moving tissue

Explanation

Echoes from deeper structures are weaker because of attenuation, so time-gain compensation applies progressively greater amplification to later-arriving echoes. This creates a more uniform brightness across depths.

Question 48Physics and Instrumentation

Why is acoustic coupling gel applied between the transducer and the skin?

  1. To cool the transducer crystal
  2. To sterilize the transducer face
  3. To eliminate the air interface between transducer and skin Correct answer.
  4. To increase the propagation speed in tissue

Explanation

Air has an extremely low acoustic impedance compared with the transducer and skin, so nearly all sound is reflected at an air gap. Gel displaces the air and provides a continuous path for the beam.

Question 49Physics and Instrumentation

Soft tissue attenuates ultrasound at approximately 0.5 dB per centimeter per megahertz. What total attenuation occurs at a depth of 6 cm using a 4 MHz transducer?

  1. 12 dB Correct answer.
  2. 24 dB
  3. 48 dB
  4. 3 dB

Explanation

Multiply the coefficient by frequency and by path length: 0.5 × 4 × 6 = 12 dB. Note that depth here is the one-way path length used by the rule of thumb.

Question 50Physics and Instrumentation

The strength of a reflection at a boundary between two media depends mainly on which factor?

  1. Angle of the transducer alone
  2. Total attenuation of the beam
  3. Difference in acoustic impedance between the media Correct answer.
  4. Frequency of the transducer alone

Explanation

The reflection coefficient is governed by the mismatch in acoustic impedance across the interface. A large impedance difference produces a strong echo, while nearly matched impedances transmit most of the sound.