Equipment Operation and Quality Control
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| True or False? The effective of projected focal spot is always smaller than the actual focal spot. | True pg. 296
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| What functions to protect the patient from overexposure and the x-ray tube from overload? | back up timer pg. 298
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| What describes the chemical ionization effects of an electric current? | electrolysis pg. 298
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| What type of relationship do kV and HVL have? | direct relationship pg. 300
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| True or False? The step down transformer is located in the filament circuit and serves to regulate the voltage and current provided to heat the x-ray tube filament. | True pg. 300
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| Decreasing SID increases? or decreases? the intensity of the x-ray photons at the image intensifiers input phosphor? | increases pg. 300
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| What are the three types of beam restrictors? | aperature diaphragms, cones and cylinders, collimators pg. 302
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| Electrons are focused carefully to maintain image resolution by what device? | electrostatic focusing lenses pg. 303
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| A charged coupling device converts visible light to an electrical charge that is sent to what for processing? | analog to digital converter pg. 303
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| PBL must be accurate to what percent of the SID? | 2% pg. 305
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| Reproducibility specifies that radiation output must be consistent to within what percent? | +/- 5% pg. 310
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| What are the two main parts of an induction motor? | stator and rotor pg. 311
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| What functions to direct the liberated filament electrons to the focal spot? | Molybdenum focusing cup pg. 312
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| Which type of mobile x-ray unit is capable of storing a large milliampere seconds capacity for extended periods of time? | battery powered pg. 312
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| True or False With 3 phase, 12 pulse equipment, the voltage never drops to 0. | True pg. 313
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| What device is used to protect the circuit elements from overload by opening the circuit in the event of a power surge? | fuse pg. 314
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| With single phase equipment, the number of heat units produced during a single exposure is determined using what equation? | mA x time x kV pg. 315
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| Three phase, twelve pulse equipment has what percent voltage ripple? | 3.5% pg. 315
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| The glass envelope and oil coolant provide what type of filtration? | inherent pg. 316
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| What is used to test timer accuracy on three phase equipment? | oscilloscope or synchronous spinning top pg. 317
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