Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Rad Physics 2-Unit 1
X-Ray Circuit
| Question | Answer |
|---|---|
| Table tops are typically made of _________ _________ because it _________ very little of the __________ _________. | Carbon Fiber; Absorbs; Primary Beam |
| Most table tops are _________ ________ which allow movement in all directions. | Floating tops |
| Most fluoroscopy tables tilt at least _______ to the foot and ________ to the head and are referred to as ________ tables. | 90°; 30°; 90/30 |
| Autotransformers work because of ___________ _______ induction. | Electromagnetic self induction |
| Step Up/Step Down transformers work because of ___________ ____________ induction | Electromagnetic Mutual Induction |
| Where are the main fuses located in a X-Ray circuit? | Incoming Line Voltage |
| Where should the line voltage compensator be? | Primary side of the Autotransformer |
| Where is the kVp selector located? | Attached to the secondary side of the autotransformer |
| The Prereading Voltmeter is located where and how is it connected? | Located on the secondary side of the autotransformer; connected in parallel |
| Where is the Exposure Switch & Timer located in the circuit? | Between the secondary side of the autotransformer and the primary side of the step up transformer |
| Where is the milliamp meter located? | In the middle of the secondary side of the step up transformer. |
| The filament circuit contains a ____________ transformer to increase the __________ to the _____________ of the x-ray tube. _______ Selector | Step-down; Amperage; Filament; mAs |
| The mA selector and the filament ammeter are both located where? | On the primary side of the step down transformer |
| The mA selector is a ___________ type of selector. | Rheostat |
| How is the filament ammeter connected? | In series (primary side of step down transformer) |
| Where is the rectification located? | Between the secondary side of the step up transformer and the x-ray tube |
| Where are the timers located? | After the autotransformer on the primary side of the step up transformer |
| Mechanical timers can only be used for exposures greater than ____________. | 250 ms |
| Synchronous timers have a __________ motor and operate on a _______ cycle current. The shortest exposure time that can be used is ______ and increase by multiples of ______. | synchronous; 60; 1/60 sec; 1/60. |
| The most sophisticated, complicated and accurate timers are ___________ timers. They are also the most common and have exposure times as low as __________. | Electronic; 1 millisecond (1/1000) |
| mAs timers are typically __________ timers and monitor the product of ______ and _______. | Electronic; mA and Time |
| mAs timers are located on the _____________ side of the ___________ transformer. | Secondary; Step Up |
| Rectification is for _________ ___________ control. | Voltage Polarity |
| Rectification ensures that voltage is always being fed from _________ to __________ in the x-ray tube and converts ______ current to _____ current. | Cathode to anode; AC; DC |
| Self rectification is where the ___________ rectifies itself and is found in _________ __________ and can only handle _______ technique. | x-ray tube; small portables; low |
| Self rectification and half rectification only produce x-rays every ________ second. | 1/120 |
| A diode is the electronic version of the ___________ valve. They only permit the flow of electricity in _______ direction. | Check valve; One |
| The 2 types of diodes are _________ ________ diode and __________ _________ diode. | Vacuum tube; Solid State |
| The solid state diode resembles an _________ yet the current flow goes in the _________ direction. | Arrow; Opposite |
| A ____________ Rectification uses either one or two valve tubes. | Half Wave |
| What do Half Wave Rectifications prevent? | They prevent the current from reaching the anode on the reverse bias. |
| A Half Wave Rectification eliminates the _________ __________ and allows __________ technique than self rectification. | Reverse Bias; Higher |
| A Full Wave Rectification uses _______ valve tubes that are _______ ________ rectifiers. | Four; Solid State |
| A Full Wave Rectification is also called a ________ _________ Rectification. | Graetz Bridge Rectification |
| Thermionic Diodes are what type of rectifiers? | Valve Tubes |
| A P-N Junction is what type of rectification? | Solid State Diodes |
| In the solid state diodes, electrons jump the __________ _________ from _________ charge to ___________ charge. | Forbidden Zone; negative; Positive |
| What is used to replace full wave or 3 phase rectification? | High Frequency Generators |
| High frequency generators provide a nearly constant ____________ _____________ waveform; are very ___________ and _____________; and have about a _______ % ripple. | potential voltage; Small & Cheaper; 1% ripple |
| High frequency generators use an _____________ circuit which are high speed switches or choppers that convert _______ into a series of _______ pulses. | Inverter; DC; Square pulses |
| Self-rectification is a _______% ripple. | 200% |
| Half-wave and Full-wave rectification are both ________% ripple. | 100% |
| 3-Phase, 6-Pulse rectification is a ______% ripple. | 13% |
| 3-Phase, 12-Pulse rectification is a _____% ripple. | 4% |
| High Frequency = _____% ripple; Steady DC is _____% ripple. | <1%; 0% |
| The lower the ripple percentage equals _______ x-ray intensity, _______ often. | Higher intensity; more often |
| Spinning Top Tests are used to evaluate the accuracy of the __________ and make sure the _______________ system is working properly. | Timer; Rectification |
Created by:
foster1317
Popular Radiology sets