1|Page
X-RAY MACHINE CIRCUITS AND GENERATORS Ch
8 EXAM PREVIEW 2025 WITH A FULL TESTBANK
GUARANTEED PASS
1
Q
1. The main circuit of an x-ray machine is composed of what three general sections:
2. __________________________________________
3. __________________________________________
4. __________________________________________
a
Console
High Voltage
X-ray tube circuit
2
Q
2. To protect the entire x-ray machine circuit, a large circuit _____________________ kicks off if there is
an overload or short circuit in any part of the system.
a
Breaker
3
Q
3. A device which measures the incoming voltage from the power line, and compensates for variations by
adjusting the autotransformer slightly up or down, is called the _____________ __________________
__________________________.
a
Line Voltage Compensator
4
Q
,2|Page
4. The ____________ (major and minor) controls on the x-ray machine console actually set the
autotransformer.
a
kVp
5
Q
5. The high voltage transformer is a step-up transformer with a turns ratio normally between ___________
and _____________.
a
500:1, 1,000:1
6
Q
6. Before and after passing through the step-up transformer, the only difference in the two AC waveforms
for the electricity is the ____________________ of the waves, which indicates increased voltage.
a
amplitude
7
Q
7. For full efficiency, a minimum of ____________ diode rectifiers is reQuired in the
rectifier bridge used in a single-phase x-ray machine.
a
4
8
Q
8. The modern solid-state diode is constructed by connecting an ________-type
crystal of silicon to a _________-type crystal.
a
N, P
9
Q
,3|Page
9. As long as electrons and holes are huddled together along the n-p junction, a
_________________________ bridge is formed and electricity can flow through the diode.
a
potential
10
Q
10. When AC current reverses direction, it _______________________ the diode with the holes at one end
and the electrons at the opposite end, such that electricity cannot flow through the diode.
a
polarizes
11
Q
11. It is important that ____________________________ be the last step in preparing high-voltage
electricity to enter the x-ray tube.
a
rectification
12
Q
12. In Coolidge’s hot-cathode x-ray tube, the process of __________________________
_______________________ frees electrons from the filament wire prior to exposure, which greatly improves
efficiency.
a
thermionic emission
13
Q
13. To heat the filament wire by friction between electrons, what is needed is high-
_______________________ current forced into a very thin wire.
a
amperage
14
Q
, 4|Page
14. The filament current is applied whenever the _________________ button is held down at the console.
a
rotor
15
Q
15. Once the “rotor” button is pushed, a delay is necessary before exposure can be made because it takes a
few seconds for the high-amperage current to _______________ the filament.
a
heat
16
Q
16. Excessive rotoring can cause unnecessary _______________ and _______________ to the x-ray tube
filament, reducing x-ray tube life.
a
wear, tear
17
Q
17. The step-down transformer in the filament circuit usually has a turns ratio of
__________ to produce a current of up to 5 amps (at 5 volts).
a
1:44
18
Q
18. Because the filament current enters one end of the filament and exits the other (and does not jump across
the x-ray tube, it is unnecessary to _______________________ the filament current.
a
rectify
19
Q
X-RAY MACHINE CIRCUITS AND GENERATORS Ch
8 EXAM PREVIEW 2025 WITH A FULL TESTBANK
GUARANTEED PASS
1
Q
1. The main circuit of an x-ray machine is composed of what three general sections:
2. __________________________________________
3. __________________________________________
4. __________________________________________
a
Console
High Voltage
X-ray tube circuit
2
Q
2. To protect the entire x-ray machine circuit, a large circuit _____________________ kicks off if there is
an overload or short circuit in any part of the system.
a
Breaker
3
Q
3. A device which measures the incoming voltage from the power line, and compensates for variations by
adjusting the autotransformer slightly up or down, is called the _____________ __________________
__________________________.
a
Line Voltage Compensator
4
Q
,2|Page
4. The ____________ (major and minor) controls on the x-ray machine console actually set the
autotransformer.
a
kVp
5
Q
5. The high voltage transformer is a step-up transformer with a turns ratio normally between ___________
and _____________.
a
500:1, 1,000:1
6
Q
6. Before and after passing through the step-up transformer, the only difference in the two AC waveforms
for the electricity is the ____________________ of the waves, which indicates increased voltage.
a
amplitude
7
Q
7. For full efficiency, a minimum of ____________ diode rectifiers is reQuired in the
rectifier bridge used in a single-phase x-ray machine.
a
4
8
Q
8. The modern solid-state diode is constructed by connecting an ________-type
crystal of silicon to a _________-type crystal.
a
N, P
9
Q
,3|Page
9. As long as electrons and holes are huddled together along the n-p junction, a
_________________________ bridge is formed and electricity can flow through the diode.
a
potential
10
Q
10. When AC current reverses direction, it _______________________ the diode with the holes at one end
and the electrons at the opposite end, such that electricity cannot flow through the diode.
a
polarizes
11
Q
11. It is important that ____________________________ be the last step in preparing high-voltage
electricity to enter the x-ray tube.
a
rectification
12
Q
12. In Coolidge’s hot-cathode x-ray tube, the process of __________________________
_______________________ frees electrons from the filament wire prior to exposure, which greatly improves
efficiency.
a
thermionic emission
13
Q
13. To heat the filament wire by friction between electrons, what is needed is high-
_______________________ current forced into a very thin wire.
a
amperage
14
Q
, 4|Page
14. The filament current is applied whenever the _________________ button is held down at the console.
a
rotor
15
Q
15. Once the “rotor” button is pushed, a delay is necessary before exposure can be made because it takes a
few seconds for the high-amperage current to _______________ the filament.
a
heat
16
Q
16. Excessive rotoring can cause unnecessary _______________ and _______________ to the x-ray tube
filament, reducing x-ray tube life.
a
wear, tear
17
Q
17. The step-down transformer in the filament circuit usually has a turns ratio of
__________ to produce a current of up to 5 amps (at 5 volts).
a
1:44
18
Q
18. Because the filament current enters one end of the filament and exits the other (and does not jump across
the x-ray tube, it is unnecessary to _______________________ the filament current.
a
rectify
19
Q
