BXMO EXAM QUESTIONS WITH VERIFIED ANSWERS
Which of the following would be considered a characteristic of x-rays?
1. have no mass
2. are electrically neutral
3.travel in straight lines - Answers - 1,2,3
The oldest and largest radiologic science professional organization is the: - Answers -
American Society of Radiologic Technologists (ASRT)
The organization that sets standards and prepares examinations necessary to certify
radiologic technologists and limited operators is the: - Answers - American Registry of
Radiologic Technologists (ARRT)
The radiation that exits the opposite side of the patient to expose the image receptor
(IR) is called: - Answers - Remnat radiation
The term used to describe radiation that is absorbed by matter is: - Answers -
Attenuation
The "unseen" image that is contained in the image receptor (IR) before it is processed is
called the: - Answers - Latent image
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. - Answers - Scattered
The radiation that exits the x-ray tube and travels in-air to the patient is called: -
Answers - Primary
The boxlike device attached under the tube housing that allows the limited operator to
vary the size of the radiation field is called the: - Answers - Collimator
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: - Answers - Central Ray
An exposure time of 0.02 seconds is equal to how many milliseconds? - Answers - 20
msec
The number 9 squared is equal to: - Answers - 81
The number 4 is the square root of: - Answers - 16
When 62 kVp is increased by 30%, the result is approximately: - Answers - 81
,When the fraction 7/8 is converted to a decimal, the result is: - Answers - 0.875
When 230% is expressed as a decimal, the result is: - Answers - 2.3
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 - Answers - 50 mAs
X-rays have electromagnetic energy. The velocity (or speed) of this energy travels at a
speed of: - Answers - 186,000 miles per second
The smallest possible unit of electromagnetic energy is the: - Answers - Photon
The electrical current flowing in an x-ray tube is measured in: - Answers - Milliamperes
The force or strength of the electron flow in an electrical current is measured in: -
Answers - Kilovoltage
The device used to produce the high voltage needed for x-ray production is called the: -
Answers - Transformer
In radiology, 80,000 volts is converted to: - Answers - 80 kVp
The target and the filament in the x-ray tube are made of: - Answers - Tungsten
Electrons are made available in the filament of the x-ray tube by a process called: -
Answers - Thermionic emission
The anode in x-ray tubes rotates at a high rpm to: - Answers - Dissipate the heat
The target in the x-ray tube is angled to affect the:
1. heat capacity
2. number of photons
3. sharpness of the image - Answers - 1 and 3
Which of the following would be a common small focal spot size in an x-ray tube? -
Answers - 0.6 mm
What size of target angle is required for the radiation to cover a
14-in x 17-in IR at a distance of 40 inches? - Answers - 12 degrees
The intensity of the x-ray beam is greatest at the: - Answers - Cathode end of the beam
The penetrating power of the x-ray beam is controlled by varying the: - Answers - kVp
If the mA is doubled, the x-ray photons emitted from the tube: - Answers - Double
, The x-ray tube inside the protective housing is made of: - Answers - Pyrex glass
What material is used as the added filter material in x-ray tubes? - Answers - Aluminum
What percentage of the total energy applied to an x-ray tube target is converted into x-
rays? - Answers - 99%
The density in the radiographic image is primarily controlled by the: - Answers - mA
Which of the following supplies and controls the heat required by the x-ray tube filament
for thermionic emission of electrons? - Answers - Filament circuit
Which of the following is controlled directly on the x-ray control panel?
1. mA
2. rectification
3. automatic exposure control - Answers - 1 and 3
How many detectors are contained in an automatic exposure control (AEC) device in an
x-ray table? - Answers - 3
Which of the following is varied automatically when using automatic exposure control
(AEC)? - Answers - Exposure time
Which of the following can cause too much heat on the anode and cause it to crack and
fail?
1. excessive exposure on a cold tube
2. a rapid series of large exposures
3. mA settings greater than 400 mA - Answers - 1 and 2
X-ray tubes should undergo the warm-up procedure again after they have been idle for
more than: - Answers - 1 hour
What is the heat unit (HU) of the anode if 200 mA, 0.10 sec., and 80 kVp is used on a
single- phase generator? - Answers - 1600
How many heat units (HU) are generated on a high frequency (HF) generator if an
exposure time of 300 mA, 0.12 sec., and 95 kVp is used? - Answers - 3,420
Which of the following will help prolong the life of an x-ray tube?
1. warm up the anode each morning
2. use low ma setting whenever possible
3. use the low-speed rotor whenever possible - Answers - 1,2, and 3
Which of the following x-ray generators produces the greatest amount of x-rays for the
same exposure technique? - Answers - High-frequency
Which of the following would be considered a characteristic of x-rays?
1. have no mass
2. are electrically neutral
3.travel in straight lines - Answers - 1,2,3
The oldest and largest radiologic science professional organization is the: - Answers -
American Society of Radiologic Technologists (ASRT)
The organization that sets standards and prepares examinations necessary to certify
radiologic technologists and limited operators is the: - Answers - American Registry of
Radiologic Technologists (ARRT)
The radiation that exits the opposite side of the patient to expose the image receptor
(IR) is called: - Answers - Remnat radiation
The term used to describe radiation that is absorbed by matter is: - Answers -
Attenuation
The "unseen" image that is contained in the image receptor (IR) before it is processed is
called the: - Answers - Latent image
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. - Answers - Scattered
The radiation that exits the x-ray tube and travels in-air to the patient is called: -
Answers - Primary
The boxlike device attached under the tube housing that allows the limited operator to
vary the size of the radiation field is called the: - Answers - Collimator
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: - Answers - Central Ray
An exposure time of 0.02 seconds is equal to how many milliseconds? - Answers - 20
msec
The number 9 squared is equal to: - Answers - 81
The number 4 is the square root of: - Answers - 16
When 62 kVp is increased by 30%, the result is approximately: - Answers - 81
,When the fraction 7/8 is converted to a decimal, the result is: - Answers - 0.875
When 230% is expressed as a decimal, the result is: - Answers - 2.3
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 - Answers - 50 mAs
X-rays have electromagnetic energy. The velocity (or speed) of this energy travels at a
speed of: - Answers - 186,000 miles per second
The smallest possible unit of electromagnetic energy is the: - Answers - Photon
The electrical current flowing in an x-ray tube is measured in: - Answers - Milliamperes
The force or strength of the electron flow in an electrical current is measured in: -
Answers - Kilovoltage
The device used to produce the high voltage needed for x-ray production is called the: -
Answers - Transformer
In radiology, 80,000 volts is converted to: - Answers - 80 kVp
The target and the filament in the x-ray tube are made of: - Answers - Tungsten
Electrons are made available in the filament of the x-ray tube by a process called: -
Answers - Thermionic emission
The anode in x-ray tubes rotates at a high rpm to: - Answers - Dissipate the heat
The target in the x-ray tube is angled to affect the:
1. heat capacity
2. number of photons
3. sharpness of the image - Answers - 1 and 3
Which of the following would be a common small focal spot size in an x-ray tube? -
Answers - 0.6 mm
What size of target angle is required for the radiation to cover a
14-in x 17-in IR at a distance of 40 inches? - Answers - 12 degrees
The intensity of the x-ray beam is greatest at the: - Answers - Cathode end of the beam
The penetrating power of the x-ray beam is controlled by varying the: - Answers - kVp
If the mA is doubled, the x-ray photons emitted from the tube: - Answers - Double
, The x-ray tube inside the protective housing is made of: - Answers - Pyrex glass
What material is used as the added filter material in x-ray tubes? - Answers - Aluminum
What percentage of the total energy applied to an x-ray tube target is converted into x-
rays? - Answers - 99%
The density in the radiographic image is primarily controlled by the: - Answers - mA
Which of the following supplies and controls the heat required by the x-ray tube filament
for thermionic emission of electrons? - Answers - Filament circuit
Which of the following is controlled directly on the x-ray control panel?
1. mA
2. rectification
3. automatic exposure control - Answers - 1 and 3
How many detectors are contained in an automatic exposure control (AEC) device in an
x-ray table? - Answers - 3
Which of the following is varied automatically when using automatic exposure control
(AEC)? - Answers - Exposure time
Which of the following can cause too much heat on the anode and cause it to crack and
fail?
1. excessive exposure on a cold tube
2. a rapid series of large exposures
3. mA settings greater than 400 mA - Answers - 1 and 2
X-ray tubes should undergo the warm-up procedure again after they have been idle for
more than: - Answers - 1 hour
What is the heat unit (HU) of the anode if 200 mA, 0.10 sec., and 80 kVp is used on a
single- phase generator? - Answers - 1600
How many heat units (HU) are generated on a high frequency (HF) generator if an
exposure time of 300 mA, 0.12 sec., and 95 kVp is used? - Answers - 3,420
Which of the following will help prolong the life of an x-ray tube?
1. warm up the anode each morning
2. use low ma setting whenever possible
3. use the low-speed rotor whenever possible - Answers - 1,2, and 3
Which of the following x-ray generators produces the greatest amount of x-rays for the
same exposure technique? - Answers - High-frequency
