Radiographic Imaging and Exposure
Ch. 2 Exam Questions and Answers
The X-ray tube is the most important part of the X-ray machine because that's where
the ______ are produced. - ANS-X-rays
The production of X-rays requires a rapidly moving stream of electrons that are
suddenly _________. - ANS-Stopped
The ___________ of an X-ray tube is a negatively charged electrode, that comprises a
filament and focusing cup. - ANS-Cathode
Is a coiled tungsten wire, which is the source of electrons during X-ray production. -
ANS-Filament
Most X-ray tubes are referred to as ______________ tubes because they have two
filaments: one large and one small. - ANS-Dual-focus
Made of nickel and nearly surrounds the filament. It is open at one end to allow
electrons to flow freely across the tube from cathode to anode and its purpose is to
focus the stream of electrons. - ANS-Focusing cup
The _______ of an X-ray tube is a positively charged electrode composed of
molybdenum, copper, tungsten, and graphite. - ANS-Anode
The anode consists of a __________ and, in rotating anode tubes, a __________ and
_____________ - ANS-target, stator, rotor
The binding energy of a k-shell electron is _____ keV. - ANS-69.5
X-ray energy is measured in - ANS-kiloelectron volts (keV)
1 keV = ________ electron volts - ANS-1000
The xray beam is ___________ and consists of a wide range of energies known as the
xray emission spectrum. - ANS-Polyenergetic
The lowest energies are always approximately __________ keV, and the highest
energies are always equal to the kVp set on the control panel. - ANS-15-20
, True or False
The x-ray emission spectrum, or range and intensity of x-rays emitted, changes with
different exposure technique settings on the control panel - ANS-True
The two switches on a control panel that are used to produced a radiographic exposure
and require positive pressure to be applied are.... - ANS-Deadman switch
The first switch is usually called the __________ or rotor, and the second switch is
usually called the ________ or xray button. - ANS-Prep button, exposure
The ______ button must be activated before the xray exposure to properly produce an
X-ray exposure. - ANS-Rotor
The filament current is approximately ____ to ____ A and operates at approximately
______ V - ANS-3 to 5 A, 10 V
The amount of current flowing through the filament depends on the ____ set at the
control panel. - ANS-mA
The ______ _______ heats the tungsten filament and causes thermionic emission to
occur. - ANS-Filament current
Refers to the boiling off of electrons from the filament. - ANS-Thermionic emission
The electrons liberated from the filament during thermionic emissions form a cloud
around the filament called.... - ANS-Space charge
The _______ _______ ________ refers to the tendency of the space charge to prevent
more electrons to be boiled off of the filament. - ANS-Space charge effect
Refers to the flow of electrons from cathode to anode and its measured in units called
milliamperes (mA) - ANS-Tube current
Electrons flow only in one direction in the xray tube- from ...... - ANS-Cathode to anode
As electrons strike the anode target, more than 99% of their kinetic energy is converted
to _____, where as less than 1% of their energy is converted to _______ - ANS-Heat,
X-rays
Indicates the number of xray photons in the primary beam - ANS-Quantity
Indicates its penetrating power - ANS-Quality
Determines the speed electrons in the tube current move. (Quality and penetrability) -
ANS-Kilovoltage (kVp)
Ch. 2 Exam Questions and Answers
The X-ray tube is the most important part of the X-ray machine because that's where
the ______ are produced. - ANS-X-rays
The production of X-rays requires a rapidly moving stream of electrons that are
suddenly _________. - ANS-Stopped
The ___________ of an X-ray tube is a negatively charged electrode, that comprises a
filament and focusing cup. - ANS-Cathode
Is a coiled tungsten wire, which is the source of electrons during X-ray production. -
ANS-Filament
Most X-ray tubes are referred to as ______________ tubes because they have two
filaments: one large and one small. - ANS-Dual-focus
Made of nickel and nearly surrounds the filament. It is open at one end to allow
electrons to flow freely across the tube from cathode to anode and its purpose is to
focus the stream of electrons. - ANS-Focusing cup
The _______ of an X-ray tube is a positively charged electrode composed of
molybdenum, copper, tungsten, and graphite. - ANS-Anode
The anode consists of a __________ and, in rotating anode tubes, a __________ and
_____________ - ANS-target, stator, rotor
The binding energy of a k-shell electron is _____ keV. - ANS-69.5
X-ray energy is measured in - ANS-kiloelectron volts (keV)
1 keV = ________ electron volts - ANS-1000
The xray beam is ___________ and consists of a wide range of energies known as the
xray emission spectrum. - ANS-Polyenergetic
The lowest energies are always approximately __________ keV, and the highest
energies are always equal to the kVp set on the control panel. - ANS-15-20
, True or False
The x-ray emission spectrum, or range and intensity of x-rays emitted, changes with
different exposure technique settings on the control panel - ANS-True
The two switches on a control panel that are used to produced a radiographic exposure
and require positive pressure to be applied are.... - ANS-Deadman switch
The first switch is usually called the __________ or rotor, and the second switch is
usually called the ________ or xray button. - ANS-Prep button, exposure
The ______ button must be activated before the xray exposure to properly produce an
X-ray exposure. - ANS-Rotor
The filament current is approximately ____ to ____ A and operates at approximately
______ V - ANS-3 to 5 A, 10 V
The amount of current flowing through the filament depends on the ____ set at the
control panel. - ANS-mA
The ______ _______ heats the tungsten filament and causes thermionic emission to
occur. - ANS-Filament current
Refers to the boiling off of electrons from the filament. - ANS-Thermionic emission
The electrons liberated from the filament during thermionic emissions form a cloud
around the filament called.... - ANS-Space charge
The _______ _______ ________ refers to the tendency of the space charge to prevent
more electrons to be boiled off of the filament. - ANS-Space charge effect
Refers to the flow of electrons from cathode to anode and its measured in units called
milliamperes (mA) - ANS-Tube current
Electrons flow only in one direction in the xray tube- from ...... - ANS-Cathode to anode
As electrons strike the anode target, more than 99% of their kinetic energy is converted
to _____, where as less than 1% of their energy is converted to _______ - ANS-Heat,
X-rays
Indicates the number of xray photons in the primary beam - ANS-Quantity
Indicates its penetrating power - ANS-Quality
Determines the speed electrons in the tube current move. (Quality and penetrability) -
ANS-Kilovoltage (kVp)
