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LMRT Assessment Tests 2024.
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LMRT Assessment Tests 2024. What type of current is required for proper operation of the x-ray tube? -
ANS-Direct Electromagnetic radiation travels: - ANS-In waves along a straight path
Frequency is defined as: - ANS-The number of waves passing a point per unit time
Wavelength is defined as the distance from: - ANS-Peak to peak of the wave
Wavelength and frequency are: - ANS-Inversely proportional to each other
The x-ray beam changes as it travels through the patient by a process called: -
ANS-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: - ANS-inverse
square law
Electricity is supplied to the imaging department by a: - ANS-Generator
High-frequency power: - ANS-Has almost no ripple
The primary advantage of three-phase power is that: - ANS-Voltage never drops to zero
A variable transformer that is used to select kVp for the x-ray circuit is the: -
ANS-Autotransformer
A transformer that has more turns in the secondary coil than in the primary coil is called
a: - ANS-Step-up transformer
What is the transformer used to boost voltage to kilovoltage levels called? -
ANS-Step-up transformer
Voltage coming to the x-ray machine is kept constant through the use of a(n): -
ANS-Line voltage compensator
, A step-down transformer: - ANS-Steps down voltage
Where does thermionic emission occur? - ANS-Cathode
. Which of the following devices is prereading? - ANS-kVp meter
Which device reduces voltage and provides current to produce an electron cloud or
space charge at the filament? - ANS-Step-down transformer
What changes AC to DC? - ANS-Rectifier
Which of the following is surrounded by a negatively charged focusing cup? -
ANS-Filament
Which of the following is composed of solid-state silicon-based diodes? - ANS-rectifier
What regulates the duration of x-ray production? - ANS-Timer
What is located in the x-ray circuit between the high-voltage transformer and the x-ray
tube? - ANS-Rectifier
Which of the following measures tube current? - ANS-mA meter
What device spins at 10,000-12,000 rpm? - ANS-Anode
What device uses maximum heat storage ability of the tube to deliver mAs? -
ANS-Falling load generator
What is the source of bremsstrahlung and characteristic rays? - ANS-anode
What device is turned by a rotor? - ANS-anode
The process of thermionic emission causes: - ANS-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. - ANS-Kilovoltage
Most of the energy conversion in the x-ray tube produces: - ANS-Heat
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