RADIATION SAFETY STATE TEST (LA)
QUESTIONS WITH CORRECT ANSWERS
A person is standing in an area where they are exposed to 25 mrem during a 40 second
shot with a tube setting of 10 mA. If the milliamperage were changed to 5 mA with the
same exposure time, what would the person's new exposure be? - Answer-12.5 rem
At the completion of an X-ray exposure and turning the system to stand by: - Answer-
you must survey the tube assembly 360 degrees
An X-ray cabinet must comply with unrestricted area requirements. The maximum
amount of radiation emitted from the cabinet at 1.97 inches shall not exceed: - Answer-
0.5 mR/hr
The output equivalent to curies with an X-ray tube is controlled by the: - Answer-
Amperage rheostat
The parts of the Louisiana Administrative Code that pertain directly to radiographic are
chapters: - Answer-4,5, & 10
The storage vault cannot have more than which of the following readings at any external
surface? - Answer-2mR/hr
A radiographic was exposed to a dose of 100 Mr/hr for 30 minutes. What was the dose?
- Answer-50 mrem
Radiation arising directly from the target of an X-ray tube or an accelerator, or from a
radioactive source, is usually referred to as: - Answer-Primary Radiation
In accordance with DOT regulation, radioactive materials are classified into which two
categories? - Answer-Normal and Special form
The maximum radiation intensity level at the surface of a package with a Radioactive
Yellow III shipping label is: - Answer-200 mR/hr
Van De Graaff generators obtain their electrons through: - Answer-Electrostatic principle
In most cases, the standard anode material is: - Answer-Tungsten
The high-vacuum envelope is used to: - Answer-All of them
X-radiation is produced when a supply of: - Answer-High-speed electrons are
introduced from the cathode and strike the anode within a vacuum- sealed envelope.
,Increasing _______________across the filament expends more free electrons, thereby
increasing the numbers of free electrons able to across and strike the anode target
creating more X-radiation - Answer-Milliamperes
The structure known as the cathode serves as the ___________________source. -
Answer-Electron
Most of the energy used in producing X-ray converts to: - Answer-Heat
In most tubes______________________ is used as an exit port for the x-radiation
energy. - Answer-Beryllium
Raising the kilovolts on the control panel affects the: - Answer-Penetrating capabilities
of the X-ray produced.
Sources which have been double encapsulated to prevent the release of radioactive
material are called__________________. - Answer-Special Form
The reading for the Transport Index of a shipping container should be taken how far
from the surface? - Answer-1 Meter
The RQ label placed on a transport package identifies radioactive material package as:
- Answer-Reportable Quality
A radiographic exposure device that has a radiation level of 35 mR/hr at the surface and
less than 1 mR/hr at one meter should be labeled as: - Answer-Yellow II
Upon receiving a 100 curie Ir-192 source, you note that the reading at the surface of the
exposure device is 65 mR/hr and the Transport Index is 1. What label would you need
to affix to the exposure device? - Answer-Yellow III
What is the radiation intensity at 15 feet from a 30 curie Co-60 source while using a 4
HVL collimator?(Emissivity for Co-60 is 14 R/h/c@1') - Answer-116 mR/hr
If the intensity 20 feet from Iridium 192 source is 30 mR/hr, what is the activity of the
source? (Emissivity for Ir-192 is 5.2 R/h/c @1') - Answer-2.3 Curies
What dose would a person receive standing 50 feet from a 35 curie Iridium 192 source
during a 35 minute exposure? - Answer-42 mR
At what distance would you receive an exposure of 2 millirems if using a 90 curie Iridium
192 source with a 4 half- value layer collimator during a 10 minute shot? (Emissivity for
Ir-192 is 5.2 R/h/c @1)' (one foot). - Answer-49 feet
, You are working 15 feet away from a radioactive source and your survey meter reads
75mR/hr. How far away from the source would you have to be for your survey meter to
read 2 mR/hr? - Answer-92 feet
20 feet from the source, your survey meter reads 50mR/hr. How far do you need to be
from the source to achieve a 2mR/hr dose rate? - Answer-100 feet
You're receiving 177 mR/hr during a 4 minute exposure. What would your pocket
dosimeter read? - Answer-12 mR
If you used 1" of lead as shielding, with a cobalt-60 source, how much of the original
intensity of the beam would remain? (HVL for lead with Co-60 is.49") - Answer-1/4
A source of Ir-192 has an activity of 20 curies today. What will be its activity at the end
of 5 months? (Half- life of Ir-192=75 days or 2 1⁄2 months). - Answer-5 Curies
How long would it takes for a 10 curies Co-60 source to decay to 2- 1⁄2 curies? (Half-life
for Co-60 is 5.3 years) - Answer-10.6 Years
When must a vehicle be placarded? - Answer-When transporting Radioactive Yellow III
material
Any state with which the U.S Nuclear regulatory commission or the U.S. Atomic energy
commission has entered into an effective agreement is called a
(n)__________________. - Answer-Agreement State
How often should field audits for performance be performed on radiographers? -
Answer-At least every 6 months
What is the annual occupational dose limit for adult working radioactive material? -
Answer-5 REM
How often must leak tests be performed to detect leakage and contamination of source
material? - Answer-Every 6 months
Radioactive source are never to be stored____________________. - Answer-In a
residential area
Which of the following condition would not constitute a radiation emergency requiring
notification to the RSO? - Answer-A dose in one hour of 20 mrem to certified
radiographer
A collimator should be used, at all times, while performing radiography at a temporary
job site except when: - Answer-Physically impossible to do so
QUESTIONS WITH CORRECT ANSWERS
A person is standing in an area where they are exposed to 25 mrem during a 40 second
shot with a tube setting of 10 mA. If the milliamperage were changed to 5 mA with the
same exposure time, what would the person's new exposure be? - Answer-12.5 rem
At the completion of an X-ray exposure and turning the system to stand by: - Answer-
you must survey the tube assembly 360 degrees
An X-ray cabinet must comply with unrestricted area requirements. The maximum
amount of radiation emitted from the cabinet at 1.97 inches shall not exceed: - Answer-
0.5 mR/hr
The output equivalent to curies with an X-ray tube is controlled by the: - Answer-
Amperage rheostat
The parts of the Louisiana Administrative Code that pertain directly to radiographic are
chapters: - Answer-4,5, & 10
The storage vault cannot have more than which of the following readings at any external
surface? - Answer-2mR/hr
A radiographic was exposed to a dose of 100 Mr/hr for 30 minutes. What was the dose?
- Answer-50 mrem
Radiation arising directly from the target of an X-ray tube or an accelerator, or from a
radioactive source, is usually referred to as: - Answer-Primary Radiation
In accordance with DOT regulation, radioactive materials are classified into which two
categories? - Answer-Normal and Special form
The maximum radiation intensity level at the surface of a package with a Radioactive
Yellow III shipping label is: - Answer-200 mR/hr
Van De Graaff generators obtain their electrons through: - Answer-Electrostatic principle
In most cases, the standard anode material is: - Answer-Tungsten
The high-vacuum envelope is used to: - Answer-All of them
X-radiation is produced when a supply of: - Answer-High-speed electrons are
introduced from the cathode and strike the anode within a vacuum- sealed envelope.
,Increasing _______________across the filament expends more free electrons, thereby
increasing the numbers of free electrons able to across and strike the anode target
creating more X-radiation - Answer-Milliamperes
The structure known as the cathode serves as the ___________________source. -
Answer-Electron
Most of the energy used in producing X-ray converts to: - Answer-Heat
In most tubes______________________ is used as an exit port for the x-radiation
energy. - Answer-Beryllium
Raising the kilovolts on the control panel affects the: - Answer-Penetrating capabilities
of the X-ray produced.
Sources which have been double encapsulated to prevent the release of radioactive
material are called__________________. - Answer-Special Form
The reading for the Transport Index of a shipping container should be taken how far
from the surface? - Answer-1 Meter
The RQ label placed on a transport package identifies radioactive material package as:
- Answer-Reportable Quality
A radiographic exposure device that has a radiation level of 35 mR/hr at the surface and
less than 1 mR/hr at one meter should be labeled as: - Answer-Yellow II
Upon receiving a 100 curie Ir-192 source, you note that the reading at the surface of the
exposure device is 65 mR/hr and the Transport Index is 1. What label would you need
to affix to the exposure device? - Answer-Yellow III
What is the radiation intensity at 15 feet from a 30 curie Co-60 source while using a 4
HVL collimator?(Emissivity for Co-60 is 14 R/h/c@1') - Answer-116 mR/hr
If the intensity 20 feet from Iridium 192 source is 30 mR/hr, what is the activity of the
source? (Emissivity for Ir-192 is 5.2 R/h/c @1') - Answer-2.3 Curies
What dose would a person receive standing 50 feet from a 35 curie Iridium 192 source
during a 35 minute exposure? - Answer-42 mR
At what distance would you receive an exposure of 2 millirems if using a 90 curie Iridium
192 source with a 4 half- value layer collimator during a 10 minute shot? (Emissivity for
Ir-192 is 5.2 R/h/c @1)' (one foot). - Answer-49 feet
, You are working 15 feet away from a radioactive source and your survey meter reads
75mR/hr. How far away from the source would you have to be for your survey meter to
read 2 mR/hr? - Answer-92 feet
20 feet from the source, your survey meter reads 50mR/hr. How far do you need to be
from the source to achieve a 2mR/hr dose rate? - Answer-100 feet
You're receiving 177 mR/hr during a 4 minute exposure. What would your pocket
dosimeter read? - Answer-12 mR
If you used 1" of lead as shielding, with a cobalt-60 source, how much of the original
intensity of the beam would remain? (HVL for lead with Co-60 is.49") - Answer-1/4
A source of Ir-192 has an activity of 20 curies today. What will be its activity at the end
of 5 months? (Half- life of Ir-192=75 days or 2 1⁄2 months). - Answer-5 Curies
How long would it takes for a 10 curies Co-60 source to decay to 2- 1⁄2 curies? (Half-life
for Co-60 is 5.3 years) - Answer-10.6 Years
When must a vehicle be placarded? - Answer-When transporting Radioactive Yellow III
material
Any state with which the U.S Nuclear regulatory commission or the U.S. Atomic energy
commission has entered into an effective agreement is called a
(n)__________________. - Answer-Agreement State
How often should field audits for performance be performed on radiographers? -
Answer-At least every 6 months
What is the annual occupational dose limit for adult working radioactive material? -
Answer-5 REM
How often must leak tests be performed to detect leakage and contamination of source
material? - Answer-Every 6 months
Radioactive source are never to be stored____________________. - Answer-In a
residential area
Which of the following condition would not constitute a radiation emergency requiring
notification to the RSO? - Answer-A dose in one hour of 20 mrem to certified
radiographer
A collimator should be used, at all times, while performing radiography at a temporary
job site except when: - Answer-Physically impossible to do so
