ASNT Study Guide - Industrial Radiography
Radiation Safety Questions and Correct
Answers
Question 1
There are basically three methods of protection from ionizing radiation. What are
they?
a. time, distance, collimators
b. distance, time, lead aprons
c. shielding, time, distance
d. dense atomic structures, time, and distance
Correct Answer
c. shielding, time, distance
Question 2
Becquerels and curies are units of measurement of:
a. physical size of the source
b. gray per hour
c. decay rate
d. roentgen per hour
Correct Answer
c. decay rate
Page 1 of 75
,Question 3
What dosimeters (dosimetric devices) are least affected by moisture?
a. digital dosimeters
b. film badges
c. TLDs
d. ion chambers
Correct Answer
c. TLDs
Question 4
X-radiation is produced when a supply of:
a. high-speed electrons are introduced from the cathode and strike the anode within
a vacuum-sealed envelope
b. high-speed electrons are introduced from the anode and strike the cathode within
a vacuum-sealed envelope
c. high-speed protons are introduced from the cathode and strike the anode within a
vacuum-sealed envelope
d. high-speed protons are introduced from the anode and strike the cathode within a
vacuum-sealed envelope
Correct Answer
a. high-speed electrons are introduced from the cathode and strike the anode
within a vacuum-sealed envelope
Question 5
A radiographer is receiving 100 mR (1000 uSv) at the crank assembly. The crank
assembly is 25 ft (7.62 m) in length. Where would the "RADIATION AREA" sign be
posted?
a. 111.8 ft (34.08 m)
b. 221.3 ft (67.45 m)
c. 343.7 ft (104.76 m)
d. 176.8 ft (53.89 m)
Correct Answer
a. 111.8 ft (34.08 m)
Page 2 of 75
,Question 6
Van de Graaff generators obtain their electron through:
a. the electrostatic principle
b. accelerated electrons within an annular tube
c. multiple straight alternating segments from cathode to anode
d. a combination of all the above
Correct Answer
a. the electrostatic principle
Question 7
An exposure rate is measured by:
a. survey meter
b. a dosimeter
c. rate alarm
d. TLD/film badge
Correct Answer
a. survey meter
Question 8
ALARA means:
a. as little as reasonably achievable
b. as low as reasonably acceptable
c. as little as reasonably acquired
d. as low as reasonably achievable
Correct Answer
d. as low as reasonably achievable
Page 3 of 75
, Question 9
Should a source or exposure device return a wipe resulting in more than 0.005 uCi
(185 Bq) the licensee must do what?
a. immediately call the NRC for disposal
b. immediately remove it from service and have it decontaminated or disposed of
c. immediately dispose of it, typically by burial
d. immediately notify the NRC and dispose of it at a waste site
Correct Answer
b. immediately remove it from service and have it decontaminated or disposed of
Question 10
The symbol mR means:
a. milliroentgen
b. microroentgen
c. megaroentgen
d. millirem
Correct Answer
a. milliroentgen
Question 11
If a radiographer has 60 mR (0.6 mSv) at the surface of the exposure device, what
would the reading be after 2 half-lives?
a. 15 mR (0.15 mSv)
b. 40 mR (0.4 mSv)
c. 80 mR (0.8 mSv)
d. 10 mR (0.1 mSv)
Correct Answer
a. 15 mR (0.15 mSv)
Page 4 of 75
Radiation Safety Questions and Correct
Answers
Question 1
There are basically three methods of protection from ionizing radiation. What are
they?
a. time, distance, collimators
b. distance, time, lead aprons
c. shielding, time, distance
d. dense atomic structures, time, and distance
Correct Answer
c. shielding, time, distance
Question 2
Becquerels and curies are units of measurement of:
a. physical size of the source
b. gray per hour
c. decay rate
d. roentgen per hour
Correct Answer
c. decay rate
Page 1 of 75
,Question 3
What dosimeters (dosimetric devices) are least affected by moisture?
a. digital dosimeters
b. film badges
c. TLDs
d. ion chambers
Correct Answer
c. TLDs
Question 4
X-radiation is produced when a supply of:
a. high-speed electrons are introduced from the cathode and strike the anode within
a vacuum-sealed envelope
b. high-speed electrons are introduced from the anode and strike the cathode within
a vacuum-sealed envelope
c. high-speed protons are introduced from the cathode and strike the anode within a
vacuum-sealed envelope
d. high-speed protons are introduced from the anode and strike the cathode within a
vacuum-sealed envelope
Correct Answer
a. high-speed electrons are introduced from the cathode and strike the anode
within a vacuum-sealed envelope
Question 5
A radiographer is receiving 100 mR (1000 uSv) at the crank assembly. The crank
assembly is 25 ft (7.62 m) in length. Where would the "RADIATION AREA" sign be
posted?
a. 111.8 ft (34.08 m)
b. 221.3 ft (67.45 m)
c. 343.7 ft (104.76 m)
d. 176.8 ft (53.89 m)
Correct Answer
a. 111.8 ft (34.08 m)
Page 2 of 75
,Question 6
Van de Graaff generators obtain their electron through:
a. the electrostatic principle
b. accelerated electrons within an annular tube
c. multiple straight alternating segments from cathode to anode
d. a combination of all the above
Correct Answer
a. the electrostatic principle
Question 7
An exposure rate is measured by:
a. survey meter
b. a dosimeter
c. rate alarm
d. TLD/film badge
Correct Answer
a. survey meter
Question 8
ALARA means:
a. as little as reasonably achievable
b. as low as reasonably acceptable
c. as little as reasonably acquired
d. as low as reasonably achievable
Correct Answer
d. as low as reasonably achievable
Page 3 of 75
, Question 9
Should a source or exposure device return a wipe resulting in more than 0.005 uCi
(185 Bq) the licensee must do what?
a. immediately call the NRC for disposal
b. immediately remove it from service and have it decontaminated or disposed of
c. immediately dispose of it, typically by burial
d. immediately notify the NRC and dispose of it at a waste site
Correct Answer
b. immediately remove it from service and have it decontaminated or disposed of
Question 10
The symbol mR means:
a. milliroentgen
b. microroentgen
c. megaroentgen
d. millirem
Correct Answer
a. milliroentgen
Question 11
If a radiographer has 60 mR (0.6 mSv) at the surface of the exposure device, what
would the reading be after 2 half-lives?
a. 15 mR (0.15 mSv)
b. 40 mR (0.4 mSv)
c. 80 mR (0.8 mSv)
d. 10 mR (0.1 mSv)
Correct Answer
a. 15 mR (0.15 mSv)
Page 4 of 75
