LMRT ASSESSMENT TESTS EXAM 2025
QUESTIONS AND ANSWERS
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
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,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
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, 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
X-rays are produced as incident electrons are slowed going past the nuclei of target atoms by a
process called: - ANS Bremsstrahlung
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QUESTIONS AND ANSWERS
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
1 Copyright ©2025 SIRJOEL ALL RIGHTS RESERVED
,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
2 Copyright ©2025 SIRJOEL ALL RIGHTS RESERVED
, 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
X-rays are produced as incident electrons are slowed going past the nuclei of target atoms by a
process called: - ANS Bremsstrahlung
3 Copyright ©2025 SIRJOEL ALL RIGHTS RESERVED
