ASNT Industrial Radiography Radiation
Safety Exam Questions With 100%
Verified Correct Answers.
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
All radiation exposures are equally serious and can result
False
Ionizing radiation passes through the entire body; as such, damage can occur to the:
skin, internal organs and muscles
Prompt effects of radiation exposure to acute doses include:
blood changes, nausea and fatigue
,Industrial radiography, being one of the most dangerous jobs in the world, has killed:
only one member of the public is known to have died in the world
ALARA means:
As low as reasonably achievable
The maximum occupational dose for a minor is:
10% that of an adult radiographer or 5 mSv or 0.5 rem
The alpha particle is:
more damaging than the gamma ray
The alpha particle has a quality factor of:
20
Radiation can be detected by the human senses
False
Which of the following detects, measures, or in some way records ionizing radiation?
a. thermoluminescent dosimeter
b. film badge
c. pocket ion chamber (dosimeter)
d. survey meter
e. rate alarm
Which of the two types of survey meters is considered most appropriate for industrial
radiography?
geiger-muller tube
The survey meter must be capable of measuring a range of:
2 mR/h through 1 R/h
(20 μSv/h through 10 mSv/h)
After a source has been returned to the shielded position a survey meter should show
An increase in exposure rate followed by a decrease to zero
A survey meter must be calibrated on each scale (1x, 10x, 100x, etc.) at two points:
one-third and two-thirds scale. The accuracy of each reading must be within:
20%
a dosimeter
dose rate
, A rate alarm meter or alarming rate meter must sound a
continuous audible alarm greater than 80 dL (0.3 m) at:
500 mR/h (5000 μSv/h)
Dosimeters and rate alarms must be calibrarated
Every 12 months
Film badges and thermoluminescent dosimeters (TLD's) are considered dosimeters in
the same manner as the pocket ion chamber. The main difference between a film badge
and TLD and ion chamber is the:
Ion chamber is a direct reading instrument and that the TLD/film badges must be processed by
a National Voluntary Laboratory Accreditation Program (NVLAP) lab
Sources must be leak tested every
six months
Exposure devices using depleted uranium (DU) must be leak tested every:
12 months
A leak test would be considered failed should the sample tested return a value greater than:
0.005 μCi (185 Bq)
Should a source or exposure devise return a wipe resulting in more than 0.005 μCi (185
Bq) the licensee must do what?
Immediately remove it from service and have it decontaminated or disposed of
Gamma alarms (audible & visible), also known as area alarms, must be tested every
day prior to use
There are basically three methods of protection from ionizing radiation What are they?
Dense atomic structures, time and distance
To determine the total dose received
Multiply the rate of dose by the total time exposed
At a dose rate of 60 mR/h (600 11Sv/h), 1h of exposure would be?
60 mR (600 11Sv)
The specific gamma ray constant for Co-60 can be
expressed as:
14 R/h (140 mSv/h)
Safety Exam Questions With 100%
Verified Correct Answers.
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
All radiation exposures are equally serious and can result
False
Ionizing radiation passes through the entire body; as such, damage can occur to the:
skin, internal organs and muscles
Prompt effects of radiation exposure to acute doses include:
blood changes, nausea and fatigue
,Industrial radiography, being one of the most dangerous jobs in the world, has killed:
only one member of the public is known to have died in the world
ALARA means:
As low as reasonably achievable
The maximum occupational dose for a minor is:
10% that of an adult radiographer or 5 mSv or 0.5 rem
The alpha particle is:
more damaging than the gamma ray
The alpha particle has a quality factor of:
20
Radiation can be detected by the human senses
False
Which of the following detects, measures, or in some way records ionizing radiation?
a. thermoluminescent dosimeter
b. film badge
c. pocket ion chamber (dosimeter)
d. survey meter
e. rate alarm
Which of the two types of survey meters is considered most appropriate for industrial
radiography?
geiger-muller tube
The survey meter must be capable of measuring a range of:
2 mR/h through 1 R/h
(20 μSv/h through 10 mSv/h)
After a source has been returned to the shielded position a survey meter should show
An increase in exposure rate followed by a decrease to zero
A survey meter must be calibrated on each scale (1x, 10x, 100x, etc.) at two points:
one-third and two-thirds scale. The accuracy of each reading must be within:
20%
a dosimeter
dose rate
, A rate alarm meter or alarming rate meter must sound a
continuous audible alarm greater than 80 dL (0.3 m) at:
500 mR/h (5000 μSv/h)
Dosimeters and rate alarms must be calibrarated
Every 12 months
Film badges and thermoluminescent dosimeters (TLD's) are considered dosimeters in
the same manner as the pocket ion chamber. The main difference between a film badge
and TLD and ion chamber is the:
Ion chamber is a direct reading instrument and that the TLD/film badges must be processed by
a National Voluntary Laboratory Accreditation Program (NVLAP) lab
Sources must be leak tested every
six months
Exposure devices using depleted uranium (DU) must be leak tested every:
12 months
A leak test would be considered failed should the sample tested return a value greater than:
0.005 μCi (185 Bq)
Should a source or exposure devise return a wipe resulting in more than 0.005 μCi (185
Bq) the licensee must do what?
Immediately remove it from service and have it decontaminated or disposed of
Gamma alarms (audible & visible), also known as area alarms, must be tested every
day prior to use
There are basically three methods of protection from ionizing radiation What are they?
Dense atomic structures, time and distance
To determine the total dose received
Multiply the rate of dose by the total time exposed
At a dose rate of 60 mR/h (600 11Sv/h), 1h of exposure would be?
60 mR (600 11Sv)
The specific gamma ray constant for Co-60 can be
expressed as:
14 R/h (140 mSv/h)
