A person is standing in an area where they are exposed to 25 mrem during a 40 second shot
with a tube setting of 10mA. If the milliamperage were changed to 5mA with the same expo-
sure time, what would the person's new exposure be?
ANSWER
12.5 mrem
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
1
,The storage vault cannot have more than what reading at any external surface?
ANSWER
2mR/hr
A radiographer 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 radio-
active source, is usually referred to as:
ANSWER
Primary Radiation
In accordance with DOT regulation, radioactive materials are classified into which two cate-
gories?
ANSWER
Normal and Special form
The maximum radiation intensity level at the surface of a package with a Radioactive Yelow
III shipping lable is:
ANSWER
200 mR/hr
Van De Graff generators obtain their electrons through:
ANSWER
Electrostatic principle
In most cases, the standard anode material is:
2
, ANSWER
Tungsten
The high-vacuum envelope is used to:
ANSWER
All of them:
1. Prevent oxidation of components within the tube
2. Reduce the problems of electrons colliding with, and being absorbed by molecules or air
3. Act as an electrical insulator between the cathode and anode
X-radiation is produced when a supply of:
ANSWER
High-speed electrons are introduced from the cathode and strike the anode within a vac-
uum-sealed envelope
Increasing ____________________ across the filament expends more free electrons,
thereby increasing the numbers of free electrons able to cross 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
3
with a tube setting of 10mA. If the milliamperage were changed to 5mA with the same expo-
sure time, what would the person's new exposure be?
ANSWER
12.5 mrem
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
1
,The storage vault cannot have more than what reading at any external surface?
ANSWER
2mR/hr
A radiographer 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 radio-
active source, is usually referred to as:
ANSWER
Primary Radiation
In accordance with DOT regulation, radioactive materials are classified into which two cate-
gories?
ANSWER
Normal and Special form
The maximum radiation intensity level at the surface of a package with a Radioactive Yelow
III shipping lable is:
ANSWER
200 mR/hr
Van De Graff generators obtain their electrons through:
ANSWER
Electrostatic principle
In most cases, the standard anode material is:
2
, ANSWER
Tungsten
The high-vacuum envelope is used to:
ANSWER
All of them:
1. Prevent oxidation of components within the tube
2. Reduce the problems of electrons colliding with, and being absorbed by molecules or air
3. Act as an electrical insulator between the cathode and anode
X-radiation is produced when a supply of:
ANSWER
High-speed electrons are introduced from the cathode and strike the anode within a vac-
uum-sealed envelope
Increasing ____________________ across the filament expends more free electrons,
thereby increasing the numbers of free electrons able to cross 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
3
