1 | Page
LMRT Core Review Questions and
Correct Answers/ Latest Update /
Already Graded
As a professional radiographer, the practice of ALARA requires you
to
Ans: restrict the XR beam to the clinical area of interest
The factors that affect XR emission under the direct control of the
radiographer are called_ factors
Ans: prime
Milliamperage-second (mAs) directly affects all of the following
EXCEPT
Ans: beam quality
The factors that directly affect XR quantity are
,2 | Page
Ans: mA & filtration
The factors that directly affect XR quality are
Ans: kVp & beam filtration
If 1 coulomb is equal to 6.3 x 10(18) electron charges, how many
electrons flow from cathode to anode 1 second
Ans: 6.3 x 10(18)
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?
Ans: 6.3 x 10(15)
As the mA doubles, the number of electrons flowing from cathode to
anode
Ans: increase 2-fold
, 3 | Page
The product of tube current 7 exposure time is equal to
Ans: XR beam quantity
In order to increase radiographic film density by 40% the
radiographer would
Ans: change the mAs from 15-21 mAs
The relationship between mAs & exposure is
Ans: directly proportional
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.
Ans: the reciprocity law
Increasing the kVp for an exposure will
Ans: cause the electrons to travel faster from cathode to anode
LMRT Core Review Questions and
Correct Answers/ Latest Update /
Already Graded
As a professional radiographer, the practice of ALARA requires you
to
Ans: restrict the XR beam to the clinical area of interest
The factors that affect XR emission under the direct control of the
radiographer are called_ factors
Ans: prime
Milliamperage-second (mAs) directly affects all of the following
EXCEPT
Ans: beam quality
The factors that directly affect XR quantity are
,2 | Page
Ans: mA & filtration
The factors that directly affect XR quality are
Ans: kVp & beam filtration
If 1 coulomb is equal to 6.3 x 10(18) electron charges, how many
electrons flow from cathode to anode 1 second
Ans: 6.3 x 10(18)
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?
Ans: 6.3 x 10(15)
As the mA doubles, the number of electrons flowing from cathode to
anode
Ans: increase 2-fold
, 3 | Page
The product of tube current 7 exposure time is equal to
Ans: XR beam quantity
In order to increase radiographic film density by 40% the
radiographer would
Ans: change the mAs from 15-21 mAs
The relationship between mAs & exposure is
Ans: directly proportional
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.
Ans: the reciprocity law
Increasing the kVp for an exposure will
Ans: cause the electrons to travel faster from cathode to anode
