NATIONAL BOARD REVIEW (NBDHE):
DENTAL RADIOLOGY EXAM WITH
CORRECT QUESTIONS AND ANSWERS
2025
Discovery - CORRECT-ANSWERSRoentgen - 1895 while experimenting with
Cathode ray tube
Electromagnetic Family - CORRECT-ANSWERSShorter the group's wavelength,
stronger the energy
X-rays produce ionization
Ionization - CORRECT-ANSWERSEjection of an electron from an atom, Produces
charged-ion pairs or free radicals
AC Electricity - CORRECT-ANSWERSMovement of electrons (-) along a wire
toward a + charge which changes direction 60x per second
, 1 second = - CORRECT-ANSWERS60 impulses of x-rays
Amps (mA) - CORRECT-ANSWERSNumber of electrons flowing
Volts (kVp) - CORRECT-ANSWERSPotential differences between the - and + and
therefore, the speed or force of the moving electrons toward the + charge
Quantity of the beam - CORRECT-ANSWERSNumber of x-ray photons given off in
a period of time
Quality of the beam - CORRECT-ANSWERSPenetrating nature/power of the x-ray
photons (involved wavelengths)
What affects penetration (quality)? - CORRECT-ANSWERSkVp and filtration
Density - CORRECT-ANSWERSMore photons = more density (energy = blackness)
Affected by mA, exposure time, kVp, filtration decrease, and distance decrease
Contrast - CORRECT-ANSWERSA short scale of contrast: mostly blacks and whites
DENTAL RADIOLOGY EXAM WITH
CORRECT QUESTIONS AND ANSWERS
2025
Discovery - CORRECT-ANSWERSRoentgen - 1895 while experimenting with
Cathode ray tube
Electromagnetic Family - CORRECT-ANSWERSShorter the group's wavelength,
stronger the energy
X-rays produce ionization
Ionization - CORRECT-ANSWERSEjection of an electron from an atom, Produces
charged-ion pairs or free radicals
AC Electricity - CORRECT-ANSWERSMovement of electrons (-) along a wire
toward a + charge which changes direction 60x per second
, 1 second = - CORRECT-ANSWERS60 impulses of x-rays
Amps (mA) - CORRECT-ANSWERSNumber of electrons flowing
Volts (kVp) - CORRECT-ANSWERSPotential differences between the - and + and
therefore, the speed or force of the moving electrons toward the + charge
Quantity of the beam - CORRECT-ANSWERSNumber of x-ray photons given off in
a period of time
Quality of the beam - CORRECT-ANSWERSPenetrating nature/power of the x-ray
photons (involved wavelengths)
What affects penetration (quality)? - CORRECT-ANSWERSkVp and filtration
Density - CORRECT-ANSWERSMore photons = more density (energy = blackness)
Affected by mA, exposure time, kVp, filtration decrease, and distance decrease
Contrast - CORRECT-ANSWERSA short scale of contrast: mostly blacks and whites
