B
LU
YC
D
TU
HESI Practice Questions
ES
On (Safety) And the
C
Verified Correct Answers
A
, Which statement correctly describes the LD 50/30? - ANSWER Lethal Dose for 50%
of the population in 30 days.
In an x-ray tube, what is the the source of electrons used to make x-rays? - ANSWER
Filament
Which is an advantage of using a optically stimulated luminescent (OSL) dosimeter as
opposed to a film badge? - ANSWER Not fogged by heat.
B
Which radiation dose is required to produce mitotic death? - ANSWER Less than the
LU
dose needed to produce apoptosis in slowly dividing cells or nondividing cells.
Which change causes a decrease in resistance and an increase in current flow? -
ANSWER Increasing the diameter of the conductor.
YC
What type of relationship does cell growth rate have on the sensitivity of tissues to
ionizing radiation? - ANSWER Direct
D
For which long term effect is a 28-year-old radiographer with a cumulative effective dose
(CumEfD) of 200 mSv (20 rem) at an increased risk? - ANSWER Cancer
TU
When the frequency of the voltage waveform supplied to the x-ray tube is increased,
what aspect is reduced? (Select the three that apply.)
Power consumption.
ES
Heat loading on the anode disk.
X-ray output of the tube. Incorrect
Patient exposure.
Average wavelength of the x-ray beam. - ANSWER Heat loading on the anode
C
Patient exposure
Average wavelength of the X-ray beam
A
How much can exposure to the lens of the eyes be reduced by utilizing the
posteroanterior (PA) projection of the cranium over the anteroposterior (AP) projection? -
ANSWER 95%
A Bremsstrahlung interaction is best described by which statement? - ANSWER An
electron is slowed and changes direction.
LU
YC
D
TU
HESI Practice Questions
ES
On (Safety) And the
C
Verified Correct Answers
A
, Which statement correctly describes the LD 50/30? - ANSWER Lethal Dose for 50%
of the population in 30 days.
In an x-ray tube, what is the the source of electrons used to make x-rays? - ANSWER
Filament
Which is an advantage of using a optically stimulated luminescent (OSL) dosimeter as
opposed to a film badge? - ANSWER Not fogged by heat.
B
Which radiation dose is required to produce mitotic death? - ANSWER Less than the
LU
dose needed to produce apoptosis in slowly dividing cells or nondividing cells.
Which change causes a decrease in resistance and an increase in current flow? -
ANSWER Increasing the diameter of the conductor.
YC
What type of relationship does cell growth rate have on the sensitivity of tissues to
ionizing radiation? - ANSWER Direct
D
For which long term effect is a 28-year-old radiographer with a cumulative effective dose
(CumEfD) of 200 mSv (20 rem) at an increased risk? - ANSWER Cancer
TU
When the frequency of the voltage waveform supplied to the x-ray tube is increased,
what aspect is reduced? (Select the three that apply.)
Power consumption.
ES
Heat loading on the anode disk.
X-ray output of the tube. Incorrect
Patient exposure.
Average wavelength of the x-ray beam. - ANSWER Heat loading on the anode
C
Patient exposure
Average wavelength of the X-ray beam
A
How much can exposure to the lens of the eyes be reduced by utilizing the
posteroanterior (PA) projection of the cranium over the anteroposterior (AP) projection? -
ANSWER 95%
A Bremsstrahlung interaction is best described by which statement? - ANSWER An
electron is slowed and changes direction.
