LMRT ARRT EXAM QUESTIONS AND ANSWERS
1.Roentgen discovered x-rays while working with a tube?
ANS Crookes
2.An "electron cloud" surrounding the filament of the cathode is referred
to as a
ANS Space charge
3.Free electrons of X-ray production come from the
ANS Filament
4.The creation of the space charge in the X-ray tube produces
ANS thermionic emission
5.The majority of photons in the X-ray beam are created by which process?-
ANS Bremsstrahlung interactions
6.More than 99% of the energy of the electron stream is converted into
ANS heat
7.the high-speed rotation (10,000 rpm) of the anode enables
ANS Greater dissipa- tion of heat from high technical factors
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,8.The degree of angulation of the x-ray tube target will determine the
ANS size of the actual and effective focal spot
9.A dual-focus X-ray tube has
1 Two filaments
2 Two focal spot sizes
3 Two anodes
ANS 1 and 2
10.The anode heel effect is a phenomenon of X-ray production that
results in
ANS Uneven distribution of radiation within the x-ray field
11.The penetrating power of the X-ray beam is controlled by varying the
ANS Peak kilovoltage (kVp)
12.The rate flow of current flow across the X-ray tube is measured in
ANS Ma
13.Doubling the mA will result in
1 increased patient dose
2 twice as many photons in the X-ray beam
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, 3 increased radiographic density
ANS 1, 2, and 3
14.The unit used to indicate the total quantity of X-ray expose is
ANS Millionsam- pere-seconds (mAs)
15.The device for removing long-wavelength radiation from the primary X-
ray beam is the
ANS Filter
16.X-ray equipment capable of producing 70 kVp or more is required to
have total filtration of at least
ANS 2.5 mm Al equiv
17.The purpose of rotating the anode of the X-ray tube is to
ANS Increase the heat capacity of the anode
18.Image sharpness is determined by the
ANS Size of the effective focal spot
19.Above 70 kVp, what percentage of photons is created by
the bremsstrahlung process?
ANS 85%
20. The amount detail seen in the X-ray image is referred to as
3/
19
1.Roentgen discovered x-rays while working with a tube?
ANS Crookes
2.An "electron cloud" surrounding the filament of the cathode is referred
to as a
ANS Space charge
3.Free electrons of X-ray production come from the
ANS Filament
4.The creation of the space charge in the X-ray tube produces
ANS thermionic emission
5.The majority of photons in the X-ray beam are created by which process?-
ANS Bremsstrahlung interactions
6.More than 99% of the energy of the electron stream is converted into
ANS heat
7.the high-speed rotation (10,000 rpm) of the anode enables
ANS Greater dissipa- tion of heat from high technical factors
1/
19
,8.The degree of angulation of the x-ray tube target will determine the
ANS size of the actual and effective focal spot
9.A dual-focus X-ray tube has
1 Two filaments
2 Two focal spot sizes
3 Two anodes
ANS 1 and 2
10.The anode heel effect is a phenomenon of X-ray production that
results in
ANS Uneven distribution of radiation within the x-ray field
11.The penetrating power of the X-ray beam is controlled by varying the
ANS Peak kilovoltage (kVp)
12.The rate flow of current flow across the X-ray tube is measured in
ANS Ma
13.Doubling the mA will result in
1 increased patient dose
2 twice as many photons in the X-ray beam
2/
19
, 3 increased radiographic density
ANS 1, 2, and 3
14.The unit used to indicate the total quantity of X-ray expose is
ANS Millionsam- pere-seconds (mAs)
15.The device for removing long-wavelength radiation from the primary X-
ray beam is the
ANS Filter
16.X-ray equipment capable of producing 70 kVp or more is required to
have total filtration of at least
ANS 2.5 mm Al equiv
17.The purpose of rotating the anode of the X-ray tube is to
ANS Increase the heat capacity of the anode
18.Image sharpness is determined by the
ANS Size of the effective focal spot
19.Above 70 kVp, what percentage of photons is created by
the bremsstrahlung process?
ANS 85%
20. The amount detail seen in the X-ray image is referred to as
3/
19
