RADT 1085 Final Exam Questions &
Answers 2024/2025
The changing of alternating current to direct current is known as what? - ANSWERSRectification
What is the name of the closed path over which electric current flows? - ANSWERSCircuit
What is a device called that allows current to flow in only one direction? - ANSWERSConductor
Which type of rectification will supply the x-ray tube with the greatest power? - ANSWERSFull-wave
What is the voltage supplied to the autotransformer called? - ANSWERSLine voltage
What controls the incoming voltage to the autotransformer? - ANSWERSMain breaker switch
Which of the following is the most accurate timer? - ANSWERSElectronic timer
Tapping windings of the autotransformer to supply voltage to the step-up transformer is the purpose of
which of these? - ANSWERSkVp selector
If line voltage changes because of demands by other users, automatic adjustments are made to which of
the following? - ANSWERSLine voltage compensator
Which of the following is placed in the circuit in case of current changes during the exposure? -
ANSWERSBreaker switch
Where in the x-ray circuit is the timer located? - ANSWERSBetween the autotransformer and the step-up
transformer
, Most radiographic equipment manufactured today uses which type of x-ray generator? - ANSWERSHigh-
frequency
A high-frequency generator is operated at 100 kVp, 100 ms at 800 mA. What is the power rating? -
ANSWERS80 kW
What device would be used when the millamperage is set on the control panel? - ANSWERSRheostat
Which of the following meters does NOT register until an x-ray exposure is made? -
ANSWERSMilliammeter
Which of the following types of current supplies the x-ray tube? - ANSWERSPulsating direct current
What effect does adjusting the filament control have on the production of x-rays? - ANSWERSControls
the quantity
Which of the following is the current indicated by the millimmeter? - ANSWERSTube 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? - ANSWERS121 volts
How many solid state rectifiers are needed to produce a single-phase, full-wave rectified current? -
ANSWERS4
If a full-wave rectified current has 60 cycles per second, how many pulses per second cross the x-ray
tube? - ANSWERS120
A solid-state rectifier is primarily made of which of the following substances? - ANSWERSSilicon
To produce equal density and contrast, exposure to the patient with three-phase equipment is ____
compared to single-phase. - ANSWERSEqual
Answers 2024/2025
The changing of alternating current to direct current is known as what? - ANSWERSRectification
What is the name of the closed path over which electric current flows? - ANSWERSCircuit
What is a device called that allows current to flow in only one direction? - ANSWERSConductor
Which type of rectification will supply the x-ray tube with the greatest power? - ANSWERSFull-wave
What is the voltage supplied to the autotransformer called? - ANSWERSLine voltage
What controls the incoming voltage to the autotransformer? - ANSWERSMain breaker switch
Which of the following is the most accurate timer? - ANSWERSElectronic timer
Tapping windings of the autotransformer to supply voltage to the step-up transformer is the purpose of
which of these? - ANSWERSkVp selector
If line voltage changes because of demands by other users, automatic adjustments are made to which of
the following? - ANSWERSLine voltage compensator
Which of the following is placed in the circuit in case of current changes during the exposure? -
ANSWERSBreaker switch
Where in the x-ray circuit is the timer located? - ANSWERSBetween the autotransformer and the step-up
transformer
, Most radiographic equipment manufactured today uses which type of x-ray generator? - ANSWERSHigh-
frequency
A high-frequency generator is operated at 100 kVp, 100 ms at 800 mA. What is the power rating? -
ANSWERS80 kW
What device would be used when the millamperage is set on the control panel? - ANSWERSRheostat
Which of the following meters does NOT register until an x-ray exposure is made? -
ANSWERSMilliammeter
Which of the following types of current supplies the x-ray tube? - ANSWERSPulsating direct current
What effect does adjusting the filament control have on the production of x-rays? - ANSWERSControls
the quantity
Which of the following is the current indicated by the millimmeter? - ANSWERSTube 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? - ANSWERS121 volts
How many solid state rectifiers are needed to produce a single-phase, full-wave rectified current? -
ANSWERS4
If a full-wave rectified current has 60 cycles per second, how many pulses per second cross the x-ray
tube? - ANSWERS120
A solid-state rectifier is primarily made of which of the following substances? - ANSWERSSilicon
To produce equal density and contrast, exposure to the patient with three-phase equipment is ____
compared to single-phase. - ANSWERSEqual
