BMET: Course 109 Exam UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
Autotransformer - CORRECT ANSWER one winding
Ratings - CORRECT ANSWER expressed in kVa
transformer - CORRECT ANSWER function: step up or down voltage
purpose: distribute power to load
Three phase power - CORRECT ANSWER each phase is 120 degrees apart
Separate ground D4 - CORRECT ANSWER preferred primary winding
x-ray precautions - CORRECT ANSWER very high CURRENTS
alpha particle - CORRECT ANSWER INTERNAL radiation hazard
beta particle - CORRECT ANSWER EXTERNAL radiation hazard
gamma radiation - CORRECT ANSWER speed of light
Bremsstrahlung - CORRECT ANSWER change of direction
"braking"
energy level of photon is dependent on: - CORRECT ANSWER kinetic energy, how
close to nucleus, charge of nucleus
Collisional - CORRECT ANSWER characteristic
Photon - CORRECT ANSWER smallest component of electromagnetic radiation
move through the air in wave like fluctuations
Energy level - CORRECT ANSWER f x lamda = c
RAD - CORRECT ANSWER patient radiation
REM - CORRECT ANSWER worker radiation
pyrex glass - CORRECT ANSWER high heat capability
, window - CORRECT ANSWER x-rays leave tube
insert (with vacuum) - CORRECT ANSWER more efficient x-ray production
longer tube life (less heat)
focusing cup - CORRECT ANSWER negatively charged
molybdenum
filaments - CORRECT ANSWER tungsten wire
low rotation speed - CORRECT ANSWER 3,600 RPMs
high rotation speed - CORRECT ANSWER 10,000 RPMs
mAs - CORRECT ANSWER quantity of x-ray
kVp - CORRECT ANSWER QUALITY of x-ray
Factors affecting cathode assembly output - CORRECT ANSWER length and diameter
of filament
size and shape of focusing cup
position of filament
Most common type of failure - CORRECT ANSWER filament thinning or severing
heat production - CORRECT ANSWER kVp x mA x time = H.U.
PHT - CORRECT ANSWER controls power to the x-ray tube
Exposure contactor - CORRECT ANSWER physical means of starting and stopping
the x-ray
SHT - CORRECT ANSWER develop high kVP potential across x-ray tube
Half-wave rectification - CORRECT ANSWER dental x-ray
Full wave rectification - CORRECT ANSWER R/F system
three-phase full-wave bridge - CORRECT ANSWER 6 pulse output
QUESTIONS AND CORRECT ANSWERS
Autotransformer - CORRECT ANSWER one winding
Ratings - CORRECT ANSWER expressed in kVa
transformer - CORRECT ANSWER function: step up or down voltage
purpose: distribute power to load
Three phase power - CORRECT ANSWER each phase is 120 degrees apart
Separate ground D4 - CORRECT ANSWER preferred primary winding
x-ray precautions - CORRECT ANSWER very high CURRENTS
alpha particle - CORRECT ANSWER INTERNAL radiation hazard
beta particle - CORRECT ANSWER EXTERNAL radiation hazard
gamma radiation - CORRECT ANSWER speed of light
Bremsstrahlung - CORRECT ANSWER change of direction
"braking"
energy level of photon is dependent on: - CORRECT ANSWER kinetic energy, how
close to nucleus, charge of nucleus
Collisional - CORRECT ANSWER characteristic
Photon - CORRECT ANSWER smallest component of electromagnetic radiation
move through the air in wave like fluctuations
Energy level - CORRECT ANSWER f x lamda = c
RAD - CORRECT ANSWER patient radiation
REM - CORRECT ANSWER worker radiation
pyrex glass - CORRECT ANSWER high heat capability
, window - CORRECT ANSWER x-rays leave tube
insert (with vacuum) - CORRECT ANSWER more efficient x-ray production
longer tube life (less heat)
focusing cup - CORRECT ANSWER negatively charged
molybdenum
filaments - CORRECT ANSWER tungsten wire
low rotation speed - CORRECT ANSWER 3,600 RPMs
high rotation speed - CORRECT ANSWER 10,000 RPMs
mAs - CORRECT ANSWER quantity of x-ray
kVp - CORRECT ANSWER QUALITY of x-ray
Factors affecting cathode assembly output - CORRECT ANSWER length and diameter
of filament
size and shape of focusing cup
position of filament
Most common type of failure - CORRECT ANSWER filament thinning or severing
heat production - CORRECT ANSWER kVp x mA x time = H.U.
PHT - CORRECT ANSWER controls power to the x-ray tube
Exposure contactor - CORRECT ANSWER physical means of starting and stopping
the x-ray
SHT - CORRECT ANSWER develop high kVP potential across x-ray tube
Half-wave rectification - CORRECT ANSWER dental x-ray
Full wave rectification - CORRECT ANSWER R/F system
three-phase full-wave bridge - CORRECT ANSWER 6 pulse output
