RADT 1085 Final With Solutions 100%
Correct
Which of the following is placed in the circuit in case of current changes during the exposure?
Breaker switch
Where in the x-ray circuit is the timer located? Between the autotransformer and the stepup transformer
Most radiographic equipment man...
Which of the following is placed in the circuit in case of current changes during the exposure?
Breaker switch
Where in the x-ray circuit is the timer located? Between the autotransformer and the step-
up transformer
Most radiographic equipment manufactured today uses which type of x-ray generator?
High-frequency
A high-frequency generator is operated at 100 kVp, 100 ms at 800 mA. What is the power
rating? 80 kW
What device would be used when the millamperage is set on the control panel? Rheostat
Which of the following meters does NOT register until an x-ray exposure is made?
Milliammeter
, RADT 1085 Final With Solutions 100%
Correct
Which of the following types of current supplies the x-ray tube? Pulsating direct current
What effect does adjusting the filament control have on the production of x-rays? Controls
the quantity
Which of the following is the current indicated by the millimmeter? Tube current
The incoming line voltage is 220 volts. 55% of the turns on the autotransformer are used. What
is the voltage sent to the step-up transformer? 121 volts
How many solid state rectifiers are needed to produce a single-phase, full-wave rectified current?
4
If a full-wave rectified current has 60 cycles per second, how many pulses per second cross the
x-ray tube? 120
A solid-state rectifier is primarily made of which of the following substances? Silicon
, RADT 1085 Final With Solutions 100%
Correct
To produce equal density and contrast, exposure to the patient with three-phase equipment is
____ compared to single-phase. Equal
Which of the following generators has a voltage ripple of less than 1%? High-frequency
Which of the following is NOT an advantage of automatic exposure control (AEC)?
1. Eliminates the need to select mAs
2. Duplicates radiographic exposures
3. More latitude in patient positioning 3 only
Why are high-frequency generators more efficient at producing x-rays than single-phase
generators? Voltage never drops to zero
Which of the following is NOT essential to the operation of automatic exposure controls (AEC)?
Image intensifier
What are the two kinds of electrical charges? positive and negative
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