Basic X-Ray Machine Operator
Certification Exam| Questions and
Answers Verified 100% Correct
The boxlike device attached under the tube housing that allows the operator to vary
the size of the radiation field is called the:
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:
Central Ray
An exposure time of 0.02 seconds is equal to how many milliseconds?
20 ms
When 62 kVp is increased by 30%, the result is approximately:
81
When the fraction 7/8 is converted to a decimal, the result is:
0.875
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
X-rays have electromagnetic energy. The velocity (or speed) of this energy travels at a
speed of:
, 186,000 miles per second
The smallest possible unit of electromagnetic energy is the:
Photon
The electrical current flowing in an x-ray tube is measured in:
Milliamperes (mA)
The force or strength of the electron flow in an electrical current is measured in:
Kilovoltage (kVp)
The device used to produce the high voltage needed for x-ray production is called the:
Transformer
In radiology, 80,000 volts is converted to:
(commonly used unit)
80 kVp
The target and the filament in the x-ray tube are made of:
Tungsten
Electrons are made available in the filament of the x-ray tube by a process called:
Thermionic emission
The anode in the x-ray tube rotates at a high RPM for what reason:
Dissipate the heat
The target in the x-ray tube is angled to affect the:
heat capacity
sharpness of the image
The intensity of the x-ray beam is greatest at the:
Cathode end of the beam
Certification Exam| Questions and
Answers Verified 100% Correct
The boxlike device attached under the tube housing that allows the operator to vary
the size of the radiation field is called the:
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:
Central Ray
An exposure time of 0.02 seconds is equal to how many milliseconds?
20 ms
When 62 kVp is increased by 30%, the result is approximately:
81
When the fraction 7/8 is converted to a decimal, the result is:
0.875
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
X-rays have electromagnetic energy. The velocity (or speed) of this energy travels at a
speed of:
, 186,000 miles per second
The smallest possible unit of electromagnetic energy is the:
Photon
The electrical current flowing in an x-ray tube is measured in:
Milliamperes (mA)
The force or strength of the electron flow in an electrical current is measured in:
Kilovoltage (kVp)
The device used to produce the high voltage needed for x-ray production is called the:
Transformer
In radiology, 80,000 volts is converted to:
(commonly used unit)
80 kVp
The target and the filament in the x-ray tube are made of:
Tungsten
Electrons are made available in the filament of the x-ray tube by a process called:
Thermionic emission
The anode in the x-ray tube rotates at a high RPM for what reason:
Dissipate the heat
The target in the x-ray tube is angled to affect the:
heat capacity
sharpness of the image
The intensity of the x-ray beam is greatest at the:
Cathode end of the beam
