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Radiation Safety Certification Exam Questions and Answers
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Any radiation that directly or indirectly displaces electrons from the original shell of atoms is call ____________ radiation. - Answer-Ionizing What is the basic differences between x-rays and gamma rays? - Answer-The Origin The speed at which X and gamma rays travel is: - Answer-The speed o...

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  • October 10, 2024
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  • 2024/2025
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  • any radiation that directly or indirectly displac

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Radiation Safety Certification Exam
Questions and Answers
Any radiation that directly or indirectly displaces electrons from the original shell of
atoms is call ____________ radiation. - Answer-Ionizing

What is the basic differences between x-rays and gamma rays? - Answer-The Origin

The speed at which X and gamma rays travel is: - Answer-The speed of light

The two basic types if radiation are: - Answer-Particulate and Electro-magnetic

An element with the same atomic number but a different atomic weight is a(an): -
Answer-Isotope

Electo-magnetic radiation produced during the disintegration of the nuclei of radioactive
substances is called: - Answer-Gamma radiation

Atoms are composed of protons, neutrons and - Answer-Electrons

The amount of time it takes for a given radioisotope to decay to one-half of its original
activity is referred to as its - Answer-Half-Life

In industrial radiography, which of the following is most utilized? - Answer-Gamma Rays

The are known as the center of an atoms is called the: - Answer-Nucleus

One roentgen is equal to: - Answer-1,000 milliroentgen

What does the acronym REM stand for? - Answer-Roentgen Equivalent Man

How is radiation intensity expressed? - Answer-Roentgen per hour

What does the acronym RAD stand for? - Answer-Radiation Absorbed Dose

What is the unit of measurement for the effect of any type of radiation on man that is
equivalent to the effect of one roentgen of gamma radiation to man? - Answer-REM

The amount of radiation given off by a particular isotope due to the disintegration of the
nuclei of its atoms is referred to as its - Answer-Intensity

3.5 R/hr equals how many mR/hr? - Answer-3500

, The quantity of x or gamma radiation which will produce, by means of ionization, one
electrostatic unit (esu) of charge in one cubic centimeter of dry air at standard
temperature and pressure is the____________? - Answer-Roentgen

The amount of any radioisotope that gives 3.7x10^10 disintegrations per second is the
definition of a(n)? - Answer-Curie

Biological effects of radiation are grouped into two major classes. These classes are
______________ and _______________. - Answer-Genetic Effects & Somatic Effects

The acronym ALARA means: - Answer-As Low As Reasonably Achievable

What amount of radiation exposure is generally considered excessive? - Answer-Any
unnecessary exposure is excessive.

Which of the following whole body exposures would most likely be fatal 50% of the
time? - Answer-500 REM

Which of the following human senses can detect radiation? - Answer-None

The radiation area boundary needs to be posted at an area where no one can receive a
dose of more than ___________ in any one hour. - Answer-5 mrem

Birth defects that can happen in future generations as a result of exposure to ionizing
radiation are referred to as ______________. - Answer-Genetic Effects

The cells of the human body that are most affected by ionizing radiation are the
________________. - Answer-White Blood Cells

The High Radiation area boundary needs to be posted at an area where no one can
receive a dose of more than ___________ in any one hour? - Answer-100 mrem

What is the maximum amount of detectable contamination allowed after performing a
leak test? - Answer-<0.005 Microcuries

Of the most commonly used isotopes in industrial radiography, which has the greatest
energy? Cs 137, Ir 192, Co 60 or Se 75 - Answer-Co 6o

What material is used as a primary shielding material in radiographic exposure devices?
- Answer-Depleted Uranium

What method(s) can a radiographer utilize to reduce his/her exposure to radiation? -
Answer-Time, Distance, and Shielding

How many half value layers would be required to reduce 4 R/hr to a value of
approximately 2 mR/hr? - Answer-11 Half Value Layers

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