LP4 PP & Clover learning qs
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| What are the 3 components of an x-ray imaging system? | X-ray tube, operating console, & high voltage generator
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| Define resistor | inhibits flow of current through a circuit
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| A step-UP transformer increases/decreases voltage & increases/decreases amperage | INCREASES voltage, & decreases amperage
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| The resistance of electric flow through a circuit is measured in | Ohm
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| Electrical current is measured in units of | Amperes
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| The control panel is High/Low Voltage? | LOW voltage
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| Alternating current comes in at ____cycles per sec which = 1 ____ | 60 cycles per sec, 1 Hertz
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| Which component of the xray circuit must be powered by alternating current in order to function | Transformers
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| What are the 3 types of transformers? | Autotransformer, Step-Up, Step-down transformer
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| What is a single winding with an iron core in the middle | Autotransformer
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| What checks the incoming voltage? | Line monitor
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| What measures voltage and adjusts it to make it precise? | Line compensator
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| The autotransformer is located between the ____ ____ ____ and the _____ ______ transformer | Main power supply, step-up transformer
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| An Autotransformer functions based on the principle of | Self-induction
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| AC(alternating current) is best described as current that alternates between | positive and negative polarity
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| Type of rectifier that's used in the modern xray tube is called | diode
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| Which components of the x-ray tube must receive AC in order to function | Autotransformer, Step-Up transformer, & Step-down transformer
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| Which type of rectification will produce an xray beam with the greatest intensity | Full wave rectification
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| What part in the x-ray system is considered a rhiostat | mA selector
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| In the x-ray circuit rectifiers are located in the | secondary circuit
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| Which timer is the most accurate, most common, and is used for rapid exposure? | Electronic
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| What is the safety feature of the AEC called? | Back up timer- which is set to 1.5 times the original time
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| Step-Up transformer formula | Vs/Vp= Ns/Np
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| Step-Up & Step-down transformers work off | Mutual Induction
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| Step-down transformer formula | Np/Ns=Is/Ip
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| In which circuit is the focal spot selector located | Filament circuit
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| What is the ripple for a 3 phase, High Frequency ? | <1%
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| What controls tube current? | Filament circuit
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| Thyratron is also known as | the density control
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| Define Minimum Response Time | the length of time necessary for the AEC to respond to the ionization and send a signal to terminate the exposure.
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| What MRT do modern AEC's have? | Modern AEC's have a MRT of 0.001 second
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| What is the function of a step-down transformer within the x-ray circuit? | increase current
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| Which device is located within the filament circuit of the xray system? | mA selector
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| The amount of time the kilovoltage potential is applied to the x-ray tube is controlled by which device? | exposure timer
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| In xray tube circuit, amperage must be increased to heat the filament for thermionic emission, which transformer would accomplish an increase in amperage? | Step-down transformer
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| Which technical factor controls the temperature of the cathode filament within the xray tube? | mA
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| The waveform of commercial power supply to the xray circuit is a(n)- | Alternating Current (AC)
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| Type of transformer required to increase the voltage to kilovoltage level required for the production of xrays | Step-Up transformer
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| A transformer is described as having a turns ratio of 40:1, how will this transformer change amperage? | amperage will decrease b/c this is a step-up transformer
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| Advantages of utilizing imaging equipment with minimal voltage ripple in xray tube? | increased xray quantity, increased xray quality, and increased xray penetrability
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| The filament current is controlled by the tech through a device called | Rheostat
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| Within the x-ray circuit, the step-down transformer is located btwn the | mA selector and cathode filament
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| In xray circuit, the rectifiers are located in the | secondary circuit
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| W/in an electrical circuit, term voltage refers to | electrical force creating electron movement in the circuit
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| A transformer with a greater number of turns on the primary side compared to the secondary side would be called a | step-down transformer
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| The autotransformer includes which device | kVp selector
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| Failure of rheostat would result in inability to | modify the filament current
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| Failure of the autotransformer w/in xray tube circuit results in inability to | modify xray tube voltage
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| W/in xray circuit, the rectifiers are located between | step-up transformer & xray tube
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| mAs timer monitors | mAs, shortest time, located on secondary side of HV transformer
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| Synchronous timer syncs exactly to | 60 cycles/sec, minimum exposure time, & it must be reset after each exposure
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| x-ray system operates at ___-___ kVp, and ___-____ mA | 24-150kVp, & 100-1200 mA
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| HV Generator contains which 4 components | 2 Transformers, Rectifiers, mA meter, & Focal spot selector
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| HV Generator provides power 3 ways | single phase, 3 phase, & HF
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| Which device is located in the secondary circuit of x-ray system | x-ray tube
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| The rectification bridges within the x-ray circuit function to modify the electrical power w/in x-ray system by converting | AC (alternating current) to DC (direct current)
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| In order to create a steady flow of highly penetrating x-rays, power arriving at x-ray tube must be | High-Voltage Direct Current (DC)
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| Part of x-ray circuit ensures that electrons flow in only one direction through the x-ray tube? | Rectifiers
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| Within x-ray circuit, rectifiers are positioned btwn the | Step-Up Transformer & x-ray tube
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Created by:
Levanw