X-ray Circuit and Tube heat mgmt
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| All of the following devices are located within the low voltage circuit & control console except a. step up transformer b. kilovolt control c. exposure switch d. autotransformer | a. kilovolt control
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| the autotransformer's primary purpose is to vary the ______________? A. voltage B. amperage C. exposure time D. high frequency | A. voltage
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| Which transformer is located in the filament circuit? A. rectifier B. step up transformer C. step down transformer D. Autotransformer | C. Step down transformer
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| The primary purpose of the filament circuit is to ______________. | Heat the x-ray tube filament for thermuonic emission
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| A timer that is capable of producing ultrashort exposure times is typical of an ___________ | electronic timer
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| The primary purpose of the high-voltage circuit is to | B. supply the x-ray tube w/voltage high enough to produce x-rays
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| the advantages of using a high freq generator instead of a single-phase generator include: | a.produces x-rays more efficiently B. requires less exposure time to produce a given amt of exposure technique C. producing the greatest amt of x-rays for the same exposure time D. all the above ALL correct
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| how much can the exposure time be decreased when using 3-phase x-ray equipment? A. 20% B. 30% c. 40% d. 50% - 60% | C 40%
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| Automatic exposure control AEC automatically varies the __________. A. mA B. kVp C. exposure time D. mA and kVp | C. exposure time
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| If the automatic exposure control fails during the exposure, the ___________ will terminate the exposure. A. rectifier B. high-voltage circuit C. filament circuit D. back-up timer | D back-up timer
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| which of the following steps should be used to extend the life of the tube? 1. warm up anode 2. Use high mA settings 3. do not make repeated exposures near the tube limits. |
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| what does APR stand for? | anatomically programmed radiography
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| what measures voltage output from the transformer | kVp Meter
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| what is a line voltage compensator? | it adjusts the control or fluctuation in the electric supply
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| mA selector is called a ____________?Change A/C to D/C | Rheostat
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| what is the electronic timer? | a timer that is capable of producing ultrashort exposure times
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| What is the purpose of the rectifier? |
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| How much can the exposure time be decreased when using three-phase x-ray equipment? | 40-50%
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| What does AEC automatically vary? | exposure time
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| If the AEC fails during the exposure, what unit will terminate the exposure? | back-up timer
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| How can you extend the x-ray tube life? | Warm up the anode, do not make repeated exposures near the tube limits
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| The Low Voltage circuit contains: | Autotransformer, line Voltage Compensator kVp Meter, Exposure timer, line meter
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| the Filament circuit contains: | mA selector, Rheostat, Step-down tx, Focal Spot selector
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| the high voltage circuit contains ______________. | Rectifier unit, X-ray tube, miliammeter
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| The primary purpose of the autotransformer is __________. | serve as the kilovoltage selector
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| mA selector on the control panel represents what? | Rheostat in the filament circuit
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| What is the nane of the device that is used to provide retification? | Diode
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| Name 3 transformers in an X-ray machine | autotransformers, Step down transformer, High voltage transformer
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