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ASNT Study Guide Industrial Radiography Radiation Safety Review questions and answers
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ASNT Study Guide IndustrialRadiography Radiation Safety Review
he Symbol for R means:
Roentgen
The acronym rad means:
radiation absorbed dose
The roentgen (R) exposure is measured in:
air
The symbol mR means:
milliroentgen
One roentgen or 1 R is equal to:
1000 milliroentgen
The acronym rem stands for:
roentgen equivalent man
The initialism QF stands for:
quality factor
The quality factor for X-rays and gamma rays is:
1
The quality factor for alpha (ray) particles is:
20
Activity of radioactive material is measured in:
Curies
Becquerels and curries are units of measurement of:
Decay rate
, Atoms that have excess energy and are unstable are known as:
radioactive
Elementary particle units with a negative electrical charge and a mass approximately equal
to 1/1840 that are a proton are:
electrons
Positively charged elementary particles with a mass approximately equal to 1840 times that
of an electron, or 1 AMU, are known as:
Protons
Uncharged elementary particles with a mass nearly equal to that of a proton are called:
neutrons
The area known as the center of an atom is called the:
nucleus
Any byproduct material that is encased in a capsule designed to prevent leakage or escape
of the byproduct material is a:
Sealed source
A tube through which the radioactive source travels when inside a radiographic exposure
device is a/an:
S tube
Survey meters must be calibrated at intervals not to exceed:
six months and/or after instrument servicing except
for battery changes
A Survey meter must be capable of measuring a range of:
2 to 1000 mR/h (0.02 to 10 mSv/h)
Becquerels and curies are units of measurement of:
activity
An analog survey meter must be calibrated on each scale at two points approximately:
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