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radiation safety 2024 Questions and Answers 100% Soolved
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radiation safety 2024
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radiation safety 2024Biologic material is least sensitive to irradiation under which of the following conditions?
- answer Anoxic
The late effects of radiation are considered to
1. have no threshold dose.
2. be directly related to dose.
3. occur within hours of exposure. - answer1. have no threshold dose.
2. be directly related to dose.
The interaction between ionizing radiation and the target molecule that is most likely to
occur is the
A. direct effect
B. indirect effect
C. target effect
D. random effect – answer B. Indirect effect
What is (are) the major effect(s) of deoxyribonucleic acid (DNA) irradiation? - answer
Malignant disease
Chromosome aberration
Cell death
What is the term used to describe x-ray photon interaction with matter and the
transference of part of the photon's energy to matter? - answerscattering
Which acute radiation syndrome requires the largest exposure before any effects
become apparent? - answerCentral nervous system (CNS)
How do fractionation and protraction affect radiation dose effects? - answerThey reduce
the effect of radiation exposure.
They permit cellular repair.
They allow tissue recovery.
Factors that contribute to the amount of scattered radiation produced include
1. radiation quality
2. field size
3. grid ratio - answer1. radiation quality
2. field size
Which of the following terms describes the amount of electric charge flowing per
second? - answerCurrent
, Somatic effects resulting from radiation exposure can
1. have possible consequences on the exposed individual
2.have possible consequences on future generations
3. cause temporary infertility - answer1.have possible consequences on the exposed
individual
2. cause temporary infertility
Characteristics of x-ray photons include
1. a penetrating effect on all matter
2. an ionizing effect on air
3. travelling at the speed of sound - answer1. a penetrating effect on all matter
2. an ionizing effect on air
Diagnostic x-radiation may be correctly described as
A. Low energy, low LET
B. low energy, high LET
C. high energy, low LET
D.high energy, high LET - answerA. Low energy, low LET
Which of the following anomalies is (are) possible if an exposure dose of 40 rad (400
mGy) were delivered to a pregnant uterus in the third week of pregnancy?
1.Skeletal anomaly
2.Organ anomaly
3.Neurologic anomaly - answer1.Skeletal anomaly
2.Organ anomaly
The interaction between x-ray photons and matter illustrated in the figure below is most
likely to occur
1. in structures having a high atomic number.
2. during radiographic examination of the abdomen.
3. using high kV and low mAs exposure factors. - answer2. during radiographic
examination of the abdomen.
3. using high kV and low mAs exposure factors.
If 600 rad or more is received as a whole-body dose in a short period of time, certain
symptoms will occur; these are referred to as - answeracute radiation syndrome.
Early symptoms of acute radiation syndrome include
1. leukopenia
2. nausea and vomiting
3. cataracts - answer1. leukopenia (decrease in white blood cells)
2. nausea and vomiting
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