LMRT CORE REVIEW EXAM 2025
QUESTIONS AND ANSWERS
Restrict the XR beam to the clinical area of interest - ANS As a professional radiographer, the
practice of ALARA requires you to
prime - ANS The factors that affect XR emission under the direct control of the radiographer
are called_ factors
beam quality - ANS Milliamperage-second (mAs) directly affects all of the following EXCEPT
mA & filtration - ANS The factors that directly affect XR quantity are
kVp & beam filtration - ANS The factors that directly affect XR quality are
6.3 x 10(18) - ANS If 1 coulomb is equal to 6.3 x 10(18) electron charges, how many electrons
flow from cathode to anode 1 second
6.3 x 10(15) - ANS If 1 ampere equals a flow of 6.3 x 10(18) electrons per second, how many
electrons flow from cathode to anode in 1 milliampere?
increase 2-fold - ANS As the mA doubles, the number of electrons flowing from cathode to
anode
XR beam quantity - ANS The product of tube current 7 exposure time is equal to
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, change the mAs from 15-21 mAs - ANS In order to increase radiographic film density by 40%
the radiographer would
directly proportional - ANS The relationship between mAs & exposure is
the reciprocity law - ANS The reaction of a photographic film to light is equal to the product
of the intensity of the light and the duration of the light exposure.
cause the electrons to travel faster from cathode to anode - ANS Increasing the kVp for an
exposure will
greater energy - ANS Increasing the energy of an incident electron will result in the
production of an XR photon with
radiographic film density - ANS Kilovoltage is the primary controlling factor of
contrast - ANS Adjustments in kVp should be used to control radiographic
kVp - ANS XR beam penetrability is primarily controlled by
400 mA, 200 ms, 40" SID - ANS All factor remaining constant, which of the following set of
exposure conditions would yield an image with GREATEST radiographic film density
motion - ANS The length of the exposure time (S) for a radiograph, is used to primarily
control
400 mA,0.110 sec, 80 kVp - ANS A radiograph is taken 400 mA, 55 ms, 95 kVp. A second
image could be taken to improve contrast at
2 Copyright ©2025 SIRJOEL ALL RIGHTS RESERVED
QUESTIONS AND ANSWERS
Restrict the XR beam to the clinical area of interest - ANS As a professional radiographer, the
practice of ALARA requires you to
prime - ANS The factors that affect XR emission under the direct control of the radiographer
are called_ factors
beam quality - ANS Milliamperage-second (mAs) directly affects all of the following EXCEPT
mA & filtration - ANS The factors that directly affect XR quantity are
kVp & beam filtration - ANS The factors that directly affect XR quality are
6.3 x 10(18) - ANS If 1 coulomb is equal to 6.3 x 10(18) electron charges, how many electrons
flow from cathode to anode 1 second
6.3 x 10(15) - ANS If 1 ampere equals a flow of 6.3 x 10(18) electrons per second, how many
electrons flow from cathode to anode in 1 milliampere?
increase 2-fold - ANS As the mA doubles, the number of electrons flowing from cathode to
anode
XR beam quantity - ANS The product of tube current 7 exposure time is equal to
1 Copyright ©2025 SIRJOEL ALL RIGHTS RESERVED
, change the mAs from 15-21 mAs - ANS In order to increase radiographic film density by 40%
the radiographer would
directly proportional - ANS The relationship between mAs & exposure is
the reciprocity law - ANS The reaction of a photographic film to light is equal to the product
of the intensity of the light and the duration of the light exposure.
cause the electrons to travel faster from cathode to anode - ANS Increasing the kVp for an
exposure will
greater energy - ANS Increasing the energy of an incident electron will result in the
production of an XR photon with
radiographic film density - ANS Kilovoltage is the primary controlling factor of
contrast - ANS Adjustments in kVp should be used to control radiographic
kVp - ANS XR beam penetrability is primarily controlled by
400 mA, 200 ms, 40" SID - ANS All factor remaining constant, which of the following set of
exposure conditions would yield an image with GREATEST radiographic film density
motion - ANS The length of the exposure time (S) for a radiograph, is used to primarily
control
400 mA,0.110 sec, 80 kVp - ANS A radiograph is taken 400 mA, 55 ms, 95 kVp. A second
image could be taken to improve contrast at
2 Copyright ©2025 SIRJOEL ALL RIGHTS RESERVED
