In the early years of radiography, what caused personnel to be overexposed? - Poor equipment
design, lack of understanding, lack of and poor safety practices.
In what year did Marie Curie discover radium? - Late 1898
Who coined the term radioactivity? - Marie and Pierre Curie
In the early years...
ASNT Industrial Radiography Radiation Safety
Questions | 100% Correct Answers | Verified |
Latest 2024 Version
In the early years of radiography, what caused personnel to be overexposed? - ✔✔Poor equipment
design, lack of understanding, lack of and poor safety practices.
In what year did Marie Curie discover radium? - ✔✔Late 1898
Who coined the term radioactivity? - ✔✔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? - ✔✔3" (7.62 cm)
Historically, it has been proven that the predominant cause of overexposures is: - ✔✔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: - ✔✔The
radiographer
Alpha particles were discovered by: - ✔✔Henri Becquerel
The first medical X-ray was conducted at: - ✔✔Massachusetts General
Regulations from one state to the next are essentially the me for radioactive materials - ✔✔True
A radiographer has several avenues to seek guidance and counsel. The first person he or she can turn to
is? - ✔✔their program's radiation safety officer (RSO)
,The origins of industrial radiography can be attributed to: - ✔✔Wilhelm Rontgen
The two basic types of radiation are: - ✔✔particulate and electromagnetic
Wavelike radiation travels at: - ✔✔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: - ✔✔186 000 miles/s (299 338 km/s)
Matter can be turned into energy. - ✔✔True
Alpha particles are much like a helium nucleus as they have: - ✔✔two protons, two neutrons and two
electrons
Beta particles have a/an: - ✔✔Negative charge
Alpha particles have a/an: - ✔✔Positive charge
Beta particles have a mass: - ✔✔much less than that of an alpha particle
In modern radiography the alpha and beta particles are of little concern because: - ✔✔They travel at
sub-light speeds and as such are easily ontained or shielded
X-radiation is created by applying a: - ✔✔high voltage direct current across the cathode of a vacuum
tube
X-rays are produced by an X-ray tube by the: - ✔✔passage of electrons across the tube striking the
target
, Radio waves, microwaves and infrared waves are types of: - ✔✔Nonionizing radiation
The neutron has an atomic mass of: - ✔✔1 AMU ·
The shorter the wavelength or higher the frequency, the greater the penetration; as such: - ✔✔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 - ✔✔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: - ✔✔"A" number
Gamma rays are affected by magnetic fields. - ✔✔False
As a radioisotope decays, the elements return to a stab' state by undergoing several steps; once
complete the material continues to produce radiation: - ✔✔false
After 148 days, Ir-192 would have undergone how m half lives? - ✔✔2
Activation is the process of bombarding material with: - ✔✔excess neutrons
The total number of _________ identifies an element. - ✔✔protons
Gamma radiation has a shorter wavelength than visible light, therefore making it: - ✔✔More penetrating
Overexposures to personnel can result in: - ✔✔cancer, genetic defects carried into further generations,
and death
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