Review: Basic X-Ray Machine Operator Certification questions with
answers
1.What are the Characteristics of x-rays?: 1. have no mass
2. are electrically neutral
3. travel in straight lines
4. X-rays produce biologic changes in tissues
5. X-rays are a form of electromagnetic energy
2.The organization that sets standards and prepares examinations
necessary to certify radiologic technologists and limited operators is the::
American Registry of Radiologic Technologists (ARRT)
3.The radiation that exits the opposite side of the patient to expose the
image receptor (IR) is called?: Remnant radiation
4.The term used to describe radiation that is absorbed by matter is::
Attenua- tion
5.The "unseen" image that is contained in the image receptor (IR) before it
is processed is called the:: Latent image
6.The radiation that exits the body in all directions and causes unwanted
exposure on the image receptor (IR) as well as anyone who is in the room
is called radiation.: Scattered
7.The radiation that exits the x-ray tube and travels in-air to the patient
is called:: Primary
8.The oldest and largest radiologic science professional organization is the:
: American Society of Radiologic Technologists (ASRT)
,9.The boxlike device attached under the tube housing that allows the
operator to vary the size of the radiation field is called the:: Collimator
10.An invisible line in the center of the x-ray beam and perpendicular to
the long axis of the x-ray tube is called the:: Central Ray
11.An exposure time of 0.02 seconds is equal to how many milliseconds?:
20 ms
12.When 62 kVp is increased by 30%, the result is approximately:: 81
13.When the fraction 7/8 is converted to a decimal, the result is:: 0.875
14.A radiographic image is made using 500 mA, 0.1 sec., 80 kVp,
and 48-inches SID. The value of the mAs for this exposure is: 50
mAs
15.X-rays have electromagnetic energy. The velocity (or speed) of this
energy travels at a speed of:: 186,000 miles per second
16.The smallest possible unit of electromagnetic energy is the:: Photon
17.The electrical current flowing in an x-ray tube is measured in::
Milliamperes (mA)
18.The force or strength of the electron flow in an electrical current is
mea- sured in:: Kilovoltage (kVp)
, 19.The device used to produce the high voltage needed for x-ray
production is called the:: Transformer
20.In radiology, 80,000 volts is converted to:
(commonly used unit): 80 kVp
21.The target and the filament in the x-ray tube are made of:: Tungsten
22.Electrons are made available in the filament of the x-ray tube by a
process called:: Thermionic emission
23.The anode in the x-ray tube rotates at a high RPM for what reason::
Dissi- pate the heat
24.The target in the x-ray tube is angled to affect the:: heat
capacity sharpness of the image
25.The intensity of the x-ray beam is greatest at the:: Cathode end of the
beam
26.The penetrating power of the x-ray beam is controlled by varying the:: kV
27.If the mA is doubled, the x-ray photons emitted from the tube:: Double
28.The x-ray tube inside the protective housing is made of:: Pyrex glass
29.What material is used as the added filter material in x-ray tubes?:
Aluminum
30.What percentage of the total energy applied to an x-ray tube target
is converted into x-rays?: 1%
(99% is converted into heat)
31.The density in the radiographic image is primarily controlled by the:: mA
32.Which part of the X-ray circuit supplies and controls the heat required
by the x-ray tube for thermionic emission of electrons?: Filament circuit
answers
1.What are the Characteristics of x-rays?: 1. have no mass
2. are electrically neutral
3. travel in straight lines
4. X-rays produce biologic changes in tissues
5. X-rays are a form of electromagnetic energy
2.The organization that sets standards and prepares examinations
necessary to certify radiologic technologists and limited operators is the::
American Registry of Radiologic Technologists (ARRT)
3.The radiation that exits the opposite side of the patient to expose the
image receptor (IR) is called?: Remnant radiation
4.The term used to describe radiation that is absorbed by matter is::
Attenua- tion
5.The "unseen" image that is contained in the image receptor (IR) before it
is processed is called the:: Latent image
6.The radiation that exits the body in all directions and causes unwanted
exposure on the image receptor (IR) as well as anyone who is in the room
is called radiation.: Scattered
7.The radiation that exits the x-ray tube and travels in-air to the patient
is called:: Primary
8.The oldest and largest radiologic science professional organization is the:
: American Society of Radiologic Technologists (ASRT)
,9.The boxlike device attached under the tube housing that allows the
operator to vary the size of the radiation field is called the:: Collimator
10.An invisible line in the center of the x-ray beam and perpendicular to
the long axis of the x-ray tube is called the:: Central Ray
11.An exposure time of 0.02 seconds is equal to how many milliseconds?:
20 ms
12.When 62 kVp is increased by 30%, the result is approximately:: 81
13.When the fraction 7/8 is converted to a decimal, the result is:: 0.875
14.A radiographic image is made using 500 mA, 0.1 sec., 80 kVp,
and 48-inches SID. The value of the mAs for this exposure is: 50
mAs
15.X-rays have electromagnetic energy. The velocity (or speed) of this
energy travels at a speed of:: 186,000 miles per second
16.The smallest possible unit of electromagnetic energy is the:: Photon
17.The electrical current flowing in an x-ray tube is measured in::
Milliamperes (mA)
18.The force or strength of the electron flow in an electrical current is
mea- sured in:: Kilovoltage (kVp)
, 19.The device used to produce the high voltage needed for x-ray
production is called the:: Transformer
20.In radiology, 80,000 volts is converted to:
(commonly used unit): 80 kVp
21.The target and the filament in the x-ray tube are made of:: Tungsten
22.Electrons are made available in the filament of the x-ray tube by a
process called:: Thermionic emission
23.The anode in the x-ray tube rotates at a high RPM for what reason::
Dissi- pate the heat
24.The target in the x-ray tube is angled to affect the:: heat
capacity sharpness of the image
25.The intensity of the x-ray beam is greatest at the:: Cathode end of the
beam
26.The penetrating power of the x-ray beam is controlled by varying the:: kV
27.If the mA is doubled, the x-ray photons emitted from the tube:: Double
28.The x-ray tube inside the protective housing is made of:: Pyrex glass
29.What material is used as the added filter material in x-ray tubes?:
Aluminum
30.What percentage of the total energy applied to an x-ray tube target
is converted into x-rays?: 1%
(99% is converted into heat)
31.The density in the radiographic image is primarily controlled by the:: mA
32.Which part of the X-ray circuit supplies and controls the heat required
by the x-ray tube for thermionic emission of electrons?: Filament circuit
