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1 HESI Radiography Practice Test Questions and Answers
2024 COMPLETE
Which procedure is an example of surgical asepsis?
- Surgical hand scrub.
- Clean glove application.
- Clean gown application.
- Hand washing.
- Surgical hand scrub.
- 100 mA, 1/20 second, 110 kVp.
Asepsis is the absence of disease-producing (pathogenic) organisms. Surgical asepsis, or sterile technique, includes procedures used to eliminate all microorganisms from an area. Surgical hand scrub, sterile glove application, and sterile gown application are examples of surgical asepsis. Medical asepsis, or clean technique, includes procedures used to reduce the number of and prevent the spread of microorganisms. Hand washing, barrier techniques (clean glove and clean gown application), and routine environmental cleaning are examples of medical asepsis.
The only permissible exposure according to the provided chart is 100 mA, 1/20 second and 110 kVp. The point of intersection between 100 mA and 1/20 second is found to be below and to the left of the 110 kVp curve, and therefore is permissible. All other responses correspond to points found above and to the right of their respective kVp curves and are thus forbidden. 1 / 4
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2 A radiographic rating chart is provided for a portable unit. Which combination of milliamperes (mA), seconds, and kilovolts peak (kVp) is permissible for a single exposure according to the chart?
- 100 mA, 1/20 second, 110 kVp.
- 160 mA, 1/30 second, 80 kVp.
- 140 mA, 1/10 second, 90 kVp.
- 200 mA, 1/60 second, 70 kVp
On which system does hospital staff input new orders for radiologic examinations?
- Hospital information system.
- Digital imaging and communications system.
- Picture archiving and communication system.
- Radiology information system
- Hospital information system.
New orders are entered on the hospital information system.The radiology information system tracks workflow and collects work-related data in the Radiology department only. There really isn’t a digital imaging and communications (DICOM) system. Instead there is a DICOM standard, which permits picture archiving and communications systems (PACS) to communicate with each other and connected computers. Picture archiving and communication systems (PACS) store medical images, essentially replacing the file room. 2 / 4
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3 Which aspect of electrical power is responsible for accelerating electrons in an x- ray tube?
- Potential difference.
- Resistive heat.
- Total wattage.
- Current flow.
- Potential difference.
Selected kVp, also known as potential difference, accelerates electrons crossing an x- ray tube. Resistive heat is a source of power consumption, but has nothing to do with accelerating electrons. Total wattage is a measure of electrical power, of which only a part (voltage or potential difference) actually accelerates electrons. Current flow is the stream of electrons, not what accelerates them.Which part of the x-ray circuit is controlled by adjusting the milliamperage (mA) setting on the operating console for the purpose of producing the heat necessary for thermionic emission?
- Filament circuit.
- Primary circuit.
- Timer circuit.
- Secondary circuit.
- Filament circuit. 3 / 4
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4 The filament circuit controls the amount of heat applied to the filament that is required to boil off the desired number of electrons by the process of thermionic emission; the amount of current that is applied to the filament is under the control of the radiographer when the mA station is selected. The primary circuit regulates the incoming power supply and determines the voltage that is applied to the x-ray tube. The secondary circuit contains the mA meter, as well as the entire x-ray tube, except for the filament circuit. The timer circuit is part of the primary circuit and controls the amount of time the filament is heated.Which information in the patient history should prompt the radiographer to decide against using automatic exposure controls when taking a chest x-ray?
- Pneumothorax.
- Oat cell carcinoma.
- Emphysema.
- Chronic bronchitis.
- Emphysema.
The pathophysiologic changes to lung tissue in emphysema result in easy penetration, so automatic exposure controls (AEC) should not be enabled for radiographic exams in these patients because the film will be too dense as a result of the control failing to shut the exposure off quickly enough. Patients with pneumothorax, chronic bronchitis, or oat cell carcinoma do not have hyperinflation of the lungs, therefore AEC can be enabled for their exams.Which change in technical factors is most likely to result in decreased exposure to the image receptor (IR)?
- Decreased beam restriction.
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