ACTUAL EXAM PAPER 2026 COMPLETE
QUESTIONS AND ANSWERS GRADED A+
⩥ 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