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ASNT Industrial Radiography Radiation
Safety Questions and Correct Answers
In the early years of radiography, what caused personnel to be
overexposed? Ans: Poor equipment design, lack of understanding,
lack of and poor safety practices.
In what year did Marie Curie discover radium? Ans: Late 1898
Who coined the term radioactivity? Ans: Marie and Pierre Curie
In the early years of radiography from 1920-1930, the maximum
thickness that could be inspected via
X-radiation was of steel? Ans: 3" (7.62 cm)
Historically, it has been proven that the predominant cause of
overexposures is: Ans: Improper surveys, the source being left in
an uncontrolled state, the source not being locked once retracted
to the shielded position
The responsibility to adhere to the regulations, license conditions
and company policies falls to: Ans: The radiographer
Alpha particles were discovered by: Ans: Henri Becquerel
The first medical X-ray was conducted at: Ans: Massachusetts
General
Regulations from one state to the next are essentially the me for
radioactive materials Ans: True
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A radiographer has several avenues to seek guidance and counsel.
The first person he or she can turn to is? Ans: their program's
radiation safety officer (RSO)
The origins of industrial radiography can be attributed to: Ans:
Wilhelm Rontgen
The two basic types of radiation are: Ans: particulate and
electromagnetic
Wavelike radiation travels at: Ans: at the speed of light without
regard to pressure, temperature or magnetic fields
Gamma rays travel in a wavelike motion at the speed of
light, which is: Ans: 186 000 miles/s (299 338 km/s)
Matter can be turned into energy. Ans: True
Alpha particles are much like a helium nucleus as they have: Ans:
two protons, two neutrons and two electrons
Beta particles have a/an: Ans: Negative charge
Alpha particles have a/an: Ans: Positive charge
Beta particles have a mass: Ans: much less than that of an alpha
particle
In modern radiography the alpha and beta particles are of little
concern because: Ans: They travel at sub-light speeds and as such
are easily ontained or shielded
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X-radiation is created by applying a: Ans: high voltage direct
current across the cathode of a vacuum tube
X-rays are produced by an X-ray tube by the: Ans: passage of
electrons across the tube striking the
target
Radio waves, microwaves and infrared waves are types of: Ans:
Nonionizing radiation
The neutron has an atomic mass of: Ans: 1 AMU ·
The shorter the wavelength or higher the frequency, the greater
the penetration; as such: Ans: primary beams have greater
penetrability than secondary beams
Elementary particles with a unit negative electrical charge and a
mass approximately equal to 1/1840 that of Ans: Electrons
The atomic weight of an atom is the combination of the total
number of protons and neutrons held in the nucleus. This is also
known as the: Ans: "A" number
Gamma rays are affected by magnetic fields. Ans: False
As a radioisotope decays, the elements return to a stab' state by
undergoing several steps; once complete the material continues to
produce radiation: Ans: false
After 148 days, Ir-192 would have undergone how m half lives?
Ans: 2
© 2025 All rights reserved
ASNT Industrial Radiography Radiation
Safety Questions and Correct Answers
In the early years of radiography, what caused personnel to be
overexposed? Ans: Poor equipment design, lack of understanding,
lack of and poor safety practices.
In what year did Marie Curie discover radium? Ans: Late 1898
Who coined the term radioactivity? Ans: Marie and Pierre Curie
In the early years of radiography from 1920-1930, the maximum
thickness that could be inspected via
X-radiation was of steel? Ans: 3" (7.62 cm)
Historically, it has been proven that the predominant cause of
overexposures is: Ans: Improper surveys, the source being left in
an uncontrolled state, the source not being locked once retracted
to the shielded position
The responsibility to adhere to the regulations, license conditions
and company policies falls to: Ans: The radiographer
Alpha particles were discovered by: Ans: Henri Becquerel
The first medical X-ray was conducted at: Ans: Massachusetts
General
Regulations from one state to the next are essentially the me for
radioactive materials Ans: True
© 2025 All rights reserved
, 2 | Page
A radiographer has several avenues to seek guidance and counsel.
The first person he or she can turn to is? Ans: their program's
radiation safety officer (RSO)
The origins of industrial radiography can be attributed to: Ans:
Wilhelm Rontgen
The two basic types of radiation are: Ans: particulate and
electromagnetic
Wavelike radiation travels at: Ans: at the speed of light without
regard to pressure, temperature or magnetic fields
Gamma rays travel in a wavelike motion at the speed of
light, which is: Ans: 186 000 miles/s (299 338 km/s)
Matter can be turned into energy. Ans: True
Alpha particles are much like a helium nucleus as they have: Ans:
two protons, two neutrons and two electrons
Beta particles have a/an: Ans: Negative charge
Alpha particles have a/an: Ans: Positive charge
Beta particles have a mass: Ans: much less than that of an alpha
particle
In modern radiography the alpha and beta particles are of little
concern because: Ans: They travel at sub-light speeds and as such
are easily ontained or shielded
© 2025 All rights reserved
, 3 | Page
X-radiation is created by applying a: Ans: high voltage direct
current across the cathode of a vacuum tube
X-rays are produced by an X-ray tube by the: Ans: passage of
electrons across the tube striking the
target
Radio waves, microwaves and infrared waves are types of: Ans:
Nonionizing radiation
The neutron has an atomic mass of: Ans: 1 AMU ·
The shorter the wavelength or higher the frequency, the greater
the penetration; as such: Ans: primary beams have greater
penetrability than secondary beams
Elementary particles with a unit negative electrical charge and a
mass approximately equal to 1/1840 that of Ans: Electrons
The atomic weight of an atom is the combination of the total
number of protons and neutrons held in the nucleus. This is also
known as the: Ans: "A" number
Gamma rays are affected by magnetic fields. Ans: False
As a radioisotope decays, the elements return to a stab' state by
undergoing several steps; once complete the material continues to
produce radiation: Ans: false
After 148 days, Ir-192 would have undergone how m half lives?
Ans: 2
© 2025 All rights reserved
