LMRT CORE REVIEW | 2026 UPDATE | QUESTIONS AND
ANSWERS | RATED 100% CORRECT
As a professional radiographer, the practice of ALARA requires you to Answer -
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 Answer - prime
Milliamperage-second (mAs) directly affects all of the following EXCEPT Answer
- beam quality
The factors that directly affect XR quantity are Answer - mA & filtration
The factors that directly affect XR quality are Answer - 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 Answer - 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? Answer - 6.3 x 10(15)
As the mA doubles, the number of electrons flowing from cathode to anode
Answer - increase 2-fold
, The product of tube current 7 exposure time is equal to Answer - XR beam
quantity
In order to increase radiographic film density by 40% the radiographer would
Answer - change the mAs from 15-21 mAs
The relationship between mAs & exposure is Answer - 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. Answer - the
reciprocity law
Increasing the kVp for an exposure will Answer - cause the electrons to travel
faster from cathode to anode
Increasing the energy of an incident electron will result in the production of an
XR photon with Answer - greater energy
Kilovoltage is the primary controlling factor of Answer - radiographic film
density
Adjustments in kVp should be used to control radiographic Answer - contrast
XR beam penetrability is primarily controlled by Answer - kVp
All factor remaining constant, which of the following set of exposure conditions
would yield an image with GREATEST radiographic film density Answer - 400
mA, 200 ms, 40" SID
ANSWERS | RATED 100% CORRECT
As a professional radiographer, the practice of ALARA requires you to Answer -
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 Answer - prime
Milliamperage-second (mAs) directly affects all of the following EXCEPT Answer
- beam quality
The factors that directly affect XR quantity are Answer - mA & filtration
The factors that directly affect XR quality are Answer - 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 Answer - 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? Answer - 6.3 x 10(15)
As the mA doubles, the number of electrons flowing from cathode to anode
Answer - increase 2-fold
, The product of tube current 7 exposure time is equal to Answer - XR beam
quantity
In order to increase radiographic film density by 40% the radiographer would
Answer - change the mAs from 15-21 mAs
The relationship between mAs & exposure is Answer - 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. Answer - the
reciprocity law
Increasing the kVp for an exposure will Answer - cause the electrons to travel
faster from cathode to anode
Increasing the energy of an incident electron will result in the production of an
XR photon with Answer - greater energy
Kilovoltage is the primary controlling factor of Answer - radiographic film
density
Adjustments in kVp should be used to control radiographic Answer - contrast
XR beam penetrability is primarily controlled by Answer - kVp
All factor remaining constant, which of the following set of exposure conditions
would yield an image with GREATEST radiographic film density Answer - 400
mA, 200 ms, 40" SID
