LMRT Assessment Tests Questions and
Answers
. What type of current is required for proper operation of the x-ray tube? - Answer-Direct
Electromagnetic radiation travels: - Answer-In waves along a straight path
Frequency is defined as: - Answer-The number of waves passing a point per unit time
Wavelength is defined as the distance from: - Answer-Peak to peak of the wave
Wavelength and frequency are: - Answer-Inversely proportional to each other
The x-ray beam changes as it travels through the patient by a process called: - Answer-Attenuation
The intensity of radiation is inversely proportional to the square of the distance between the source of
radiation and the person receiving it. This describes the: - Answer-inverse square law
Electricity is supplied to the imaging department by a: - Answer-Generator
,High-frequency power: - Answer-Has almost no ripple
The primary advantage of three-phase power is that: - Answer-Voltage never drops to zero
A variable transformer that is used to select kVp for the x-ray circuit is the: - Answer-Autotransformer
A transformer that has more turns in the secondary coil than in the primary coil is called a: - Answer-
Step-up transformer
What is the transformer used to boost voltage to kilovoltage levels called? - Answer-Step-up
transformer
Voltage coming to the x-ray machine is kept constant through the use of a(n): - Answer-Line voltage
compensator
A step-down transformer: - Answer-Steps down voltage
Where does thermionic emission occur? - Answer-Cathode
. Which of the following devices is prereading? - Answer-kVp meter
Which device reduces voltage and provides current to produce an electron cloud or space charge at the
filament? - Answer-Step-down transformer
What changes AC to DC? - Answer-Rectifier
, Which of the following is surrounded by a negatively charged focusing cup? - Answer-Filament
Which of the following is composed of solid-state silicon-based diodes? - Answer-rectifier
What regulates the duration of x-ray production? - Answer-Timer
What is located in the x-ray circuit between the high-voltage transformer and the x-ray tube? - Answer-
Rectifier
Which of the following measures tube current? - Answer-mA meter
What device spins at 10,000-12,000 rpm? - Answer-Anode
What device uses maximum heat storage ability of the tube to deliver mAs? - Answer-Falling load
generator
What is the source of bremsstrahlung and characteristic rays? - Answer-anode
What device is turned by a rotor? - Answer-anode
The process of thermionic emission causes: - Answer-Electrons to boil off the filament
The force with which the electron stream passes from cathode to anode is a result of _____ passing
through the x-ray tube. - Answer-Kilovoltage
Most of the energy conversion in the x-ray tube produces: - Answer-Heat
Answers
. What type of current is required for proper operation of the x-ray tube? - Answer-Direct
Electromagnetic radiation travels: - Answer-In waves along a straight path
Frequency is defined as: - Answer-The number of waves passing a point per unit time
Wavelength is defined as the distance from: - Answer-Peak to peak of the wave
Wavelength and frequency are: - Answer-Inversely proportional to each other
The x-ray beam changes as it travels through the patient by a process called: - Answer-Attenuation
The intensity of radiation is inversely proportional to the square of the distance between the source of
radiation and the person receiving it. This describes the: - Answer-inverse square law
Electricity is supplied to the imaging department by a: - Answer-Generator
,High-frequency power: - Answer-Has almost no ripple
The primary advantage of three-phase power is that: - Answer-Voltage never drops to zero
A variable transformer that is used to select kVp for the x-ray circuit is the: - Answer-Autotransformer
A transformer that has more turns in the secondary coil than in the primary coil is called a: - Answer-
Step-up transformer
What is the transformer used to boost voltage to kilovoltage levels called? - Answer-Step-up
transformer
Voltage coming to the x-ray machine is kept constant through the use of a(n): - Answer-Line voltage
compensator
A step-down transformer: - Answer-Steps down voltage
Where does thermionic emission occur? - Answer-Cathode
. Which of the following devices is prereading? - Answer-kVp meter
Which device reduces voltage and provides current to produce an electron cloud or space charge at the
filament? - Answer-Step-down transformer
What changes AC to DC? - Answer-Rectifier
, Which of the following is surrounded by a negatively charged focusing cup? - Answer-Filament
Which of the following is composed of solid-state silicon-based diodes? - Answer-rectifier
What regulates the duration of x-ray production? - Answer-Timer
What is located in the x-ray circuit between the high-voltage transformer and the x-ray tube? - Answer-
Rectifier
Which of the following measures tube current? - Answer-mA meter
What device spins at 10,000-12,000 rpm? - Answer-Anode
What device uses maximum heat storage ability of the tube to deliver mAs? - Answer-Falling load
generator
What is the source of bremsstrahlung and characteristic rays? - Answer-anode
What device is turned by a rotor? - Answer-anode
The process of thermionic emission causes: - Answer-Electrons to boil off the filament
The force with which the electron stream passes from cathode to anode is a result of _____ passing
through the x-ray tube. - Answer-Kilovoltage
Most of the energy conversion in the x-ray tube produces: - Answer-Heat
