RAD-236 Chapter 6Exam QUESTIONS AND
ANSWERS | 2026 UPDATE | WITH COMPLETE
SOLUTIONS
The function of the x-ray imaging system is to provide a controlled flow of ________
intense enough to produce an x-ray beam appropriate for imaging. - ANSWER-
electrons
What are the three main components of an x-ray imaging system? - ANSWER-- x-ray
tube
- operating console
- high voltage generator
A _____ _____ examination couch in an x-ray exam room contributes to reduced
patient radiation dose. - ANSWER-carbon fiber
Couches can either be _______ (which is easily unlocked and moved) or _____
______. - ANSWER-floating, motor driven
If the couch can be used for a fluoroscopic exam, the bucky tray must be moved to the
____ of the couch. - ANSWER-foot
A fluoroscopic couch can be tilted ___ degrees to the foot side and ___ degrees below
horizontal on the head side. - ANSWER-90, 30
,The _________ _______ allows radiologic technologists to control the x-ray tube
current and voltage so that the useful x-ray beam is of proper quantity and quality. -
ANSWER-operating console
Radiation quantity is x-ray _______ while radiation quality is x-ray ___________. -
ANSWER-intensity, penetrability
Radiation quantity is usually expressed in ____ or ________. - ANSWER-mGy(a) or
mGy(a)/mAs
Radiation quality is expressed in ___ or ____ _____ _____. - ANSWER-kVp, half-value
layer
The operating console provides controls and ______ for monitoring kVp, mA, and
exposure time. - ANSWER-meters
All of the electric circuits that connect the controls and meters on the operating console
are at a ___ voltage. - ANSWER-low
Most modern consoles have implemented __________ __________ __________. -
ANSWER-automatically programmed radiography (APR)
Most x-ray imaging systems are designed to operate on ___ volts (V) of power. -
ANSWER-220
Since the required voltage of an x-ray imaging system cannot be provided countinously
and accurately, a ____ ___________ is used to measure voltage and adjust that
voltage to precisely 220 V. - ANSWER-line compensator
Older x-ray imaging systems required technologists to adjust the voltage while
observing a ____ _______ _____, but an automatic line compensator has replaced that
practice. - ANSWER-line voltage meter
The power supplied to the x-ray imaging system is delivered first to the
_______________. - ANSWER-autotransformer
The autotransformer is designed to supply a precise voltage to the _______ ______
and to the ____ ______ ______ of the x-ray imaging system. - ANSWER-filament
circuit, high-voltage circuit
An autotransformer works on the principle of ____ __________. - ANSWER-self
induction
An autotransformer is composed of only one ________ and one ____. - ANSWER-
winding, core
The single winding on an autotransformer has many connections along its length which
are called ________ and _________ connections. - ANSWER-primary, secondary
Primary connections and secondary connections can also be called what? - ANSWER-
primary and secondary taps
The primary connections (taps) conduct ______ power to the autotransformer and are
connected to the ____ ___________. - ANSWER-input, line compensator
The secondary connection (taps) are used to increase and decrease _______. -
ANSWER-voltage
If secondary connections (taps) are located closer to the end of the winding, they are
used to ________ voltage. If they are located more towards the midline, they are used
to ________ voltage. - ANSWER-increase, decrease
The autotransformer can be designed to step up voltage to about ___ times the input
voltage value. - ANSWER-2
, The voltage an autotransformer receives (the primary voltage) and the voltage is
provides (secondary voltage) are directly related to the number of _____ of the
transformer enclosed by primary and secondary connections (taps). - ANSWER-turns
What is the autotransformer law? - ANSWER-Vs/Vp = Ns/Np
(Vs = secondary voltage, Vp = primary voltage, Ns = number of windings enclosed by
secondary connections, Np = number of windings enclosed by primary connections).
Older x-ray operating consoles have adjustment controls labeled ______ ___ and
______ ___; and by selecting a combination of these controls, technologists can
provide the precise required kilovolt peak. - ANSWER-major kVp, minor kVp
The minor kVp adjustment ____ ______ the selected technique. - ANSWER-fine tunes
The major and minor kVp adjustments are two separate series of connections on the
_______________. - ANSWER-autotransformer
If the primary voltage to the autotransformer is 220 V, the output of the autotransformer
is controllable between the amounts of ___ to ____ V. - ANSWER-100, 400
The low voltage of 220 V to the autotransformer becomes the input to the ____
________ ____-__ __________ that increases the voltage to the chosen kilovolt peak. -
ANSWER-high voltage step-up transformer
The ___ _____ is placed across the output terminals of the autotransformer and reads
voltage as well as registers kilovolts. - ANSWER-kVp meter
On most operating consoles, the kVp meter registers kilovoltage before an exposure is
being made even though there is no current in the circuit. This type of meter is called a
________ ___ _____ and allows for kilovoltage to be monitored before an exposure. -
ANSWER-reading kVp meter
The x-ray tube electric current, crossing from cathode to anode, is measured in
_____________. - ANSWER-milliamperes (mA)
The number of electrons emitted by the filament is determined by the ___________ of
the filament. - ANSWER-temperature
The filament temperature is controlled by the filament current, which is measured in
________. - ANSWER-amperes (A)
As filament current increases, there is an ________ in electrons released by thermionic
emission. - ANSWER-increase
Filaments operate at currents of ___ to ___ amperes (A). - ANSWER-3, 6
The _____ _____ ______ occurs when the negatively charged electron cloud created
during thermionic emission restricts more electrons from being released. - ANSWER-
space charge effect.
A correction circuit is incorporated to counteract the space charge effect; kVp is
__________ which allows electrons to become more attracted to the anode and leave
the filament. This is why kVp also contributes to x-ray quantity. - ANSWER-increased
X-ray tube current is controlled through a separate circuit called the _______ _______,
and connections on the autotransformer provide _______ for it. - ANSWER-filament
circuit, voltage
_______ ______ are used to reduce the voltage from the autotransformer to a value
that corresponds to the selected milliamperes (mA). - ANSWER-precision resistors
The _______ ____ _________ allows the exposure to begin at maximum mA, then
drops as the anode heats. - ANSWER-falling load generator
ANSWERS | 2026 UPDATE | WITH COMPLETE
SOLUTIONS
The function of the x-ray imaging system is to provide a controlled flow of ________
intense enough to produce an x-ray beam appropriate for imaging. - ANSWER-
electrons
What are the three main components of an x-ray imaging system? - ANSWER-- x-ray
tube
- operating console
- high voltage generator
A _____ _____ examination couch in an x-ray exam room contributes to reduced
patient radiation dose. - ANSWER-carbon fiber
Couches can either be _______ (which is easily unlocked and moved) or _____
______. - ANSWER-floating, motor driven
If the couch can be used for a fluoroscopic exam, the bucky tray must be moved to the
____ of the couch. - ANSWER-foot
A fluoroscopic couch can be tilted ___ degrees to the foot side and ___ degrees below
horizontal on the head side. - ANSWER-90, 30
,The _________ _______ allows radiologic technologists to control the x-ray tube
current and voltage so that the useful x-ray beam is of proper quantity and quality. -
ANSWER-operating console
Radiation quantity is x-ray _______ while radiation quality is x-ray ___________. -
ANSWER-intensity, penetrability
Radiation quantity is usually expressed in ____ or ________. - ANSWER-mGy(a) or
mGy(a)/mAs
Radiation quality is expressed in ___ or ____ _____ _____. - ANSWER-kVp, half-value
layer
The operating console provides controls and ______ for monitoring kVp, mA, and
exposure time. - ANSWER-meters
All of the electric circuits that connect the controls and meters on the operating console
are at a ___ voltage. - ANSWER-low
Most modern consoles have implemented __________ __________ __________. -
ANSWER-automatically programmed radiography (APR)
Most x-ray imaging systems are designed to operate on ___ volts (V) of power. -
ANSWER-220
Since the required voltage of an x-ray imaging system cannot be provided countinously
and accurately, a ____ ___________ is used to measure voltage and adjust that
voltage to precisely 220 V. - ANSWER-line compensator
Older x-ray imaging systems required technologists to adjust the voltage while
observing a ____ _______ _____, but an automatic line compensator has replaced that
practice. - ANSWER-line voltage meter
The power supplied to the x-ray imaging system is delivered first to the
_______________. - ANSWER-autotransformer
The autotransformer is designed to supply a precise voltage to the _______ ______
and to the ____ ______ ______ of the x-ray imaging system. - ANSWER-filament
circuit, high-voltage circuit
An autotransformer works on the principle of ____ __________. - ANSWER-self
induction
An autotransformer is composed of only one ________ and one ____. - ANSWER-
winding, core
The single winding on an autotransformer has many connections along its length which
are called ________ and _________ connections. - ANSWER-primary, secondary
Primary connections and secondary connections can also be called what? - ANSWER-
primary and secondary taps
The primary connections (taps) conduct ______ power to the autotransformer and are
connected to the ____ ___________. - ANSWER-input, line compensator
The secondary connection (taps) are used to increase and decrease _______. -
ANSWER-voltage
If secondary connections (taps) are located closer to the end of the winding, they are
used to ________ voltage. If they are located more towards the midline, they are used
to ________ voltage. - ANSWER-increase, decrease
The autotransformer can be designed to step up voltage to about ___ times the input
voltage value. - ANSWER-2
, The voltage an autotransformer receives (the primary voltage) and the voltage is
provides (secondary voltage) are directly related to the number of _____ of the
transformer enclosed by primary and secondary connections (taps). - ANSWER-turns
What is the autotransformer law? - ANSWER-Vs/Vp = Ns/Np
(Vs = secondary voltage, Vp = primary voltage, Ns = number of windings enclosed by
secondary connections, Np = number of windings enclosed by primary connections).
Older x-ray operating consoles have adjustment controls labeled ______ ___ and
______ ___; and by selecting a combination of these controls, technologists can
provide the precise required kilovolt peak. - ANSWER-major kVp, minor kVp
The minor kVp adjustment ____ ______ the selected technique. - ANSWER-fine tunes
The major and minor kVp adjustments are two separate series of connections on the
_______________. - ANSWER-autotransformer
If the primary voltage to the autotransformer is 220 V, the output of the autotransformer
is controllable between the amounts of ___ to ____ V. - ANSWER-100, 400
The low voltage of 220 V to the autotransformer becomes the input to the ____
________ ____-__ __________ that increases the voltage to the chosen kilovolt peak. -
ANSWER-high voltage step-up transformer
The ___ _____ is placed across the output terminals of the autotransformer and reads
voltage as well as registers kilovolts. - ANSWER-kVp meter
On most operating consoles, the kVp meter registers kilovoltage before an exposure is
being made even though there is no current in the circuit. This type of meter is called a
________ ___ _____ and allows for kilovoltage to be monitored before an exposure. -
ANSWER-reading kVp meter
The x-ray tube electric current, crossing from cathode to anode, is measured in
_____________. - ANSWER-milliamperes (mA)
The number of electrons emitted by the filament is determined by the ___________ of
the filament. - ANSWER-temperature
The filament temperature is controlled by the filament current, which is measured in
________. - ANSWER-amperes (A)
As filament current increases, there is an ________ in electrons released by thermionic
emission. - ANSWER-increase
Filaments operate at currents of ___ to ___ amperes (A). - ANSWER-3, 6
The _____ _____ ______ occurs when the negatively charged electron cloud created
during thermionic emission restricts more electrons from being released. - ANSWER-
space charge effect.
A correction circuit is incorporated to counteract the space charge effect; kVp is
__________ which allows electrons to become more attracted to the anode and leave
the filament. This is why kVp also contributes to x-ray quantity. - ANSWER-increased
X-ray tube current is controlled through a separate circuit called the _______ _______,
and connections on the autotransformer provide _______ for it. - ANSWER-filament
circuit, voltage
_______ ______ are used to reduce the voltage from the autotransformer to a value
that corresponds to the selected milliamperes (mA). - ANSWER-precision resistors
The _______ ____ _________ allows the exposure to begin at maximum mA, then
drops as the anode heats. - ANSWER-falling load generator
