ARRT REGISTRY IMAGE PRODUCTION EXAM 2025
QUESTIONS AND ANSWERS
Voltage is stepped up or stepped down by only a small amount and sent to the
_______ side of the high voltage step up transformer
primary
Where is the timer in the X-ray circuit?
between autotransformer and high voltage transformer
mAs timers are used with __________ generators
falling load
AEC
fixed kVp, controlled mAs
positioning must be perfect
,what is the shortest time with AEC?
1 ms
falling load generator
RT sets mAs and kVp
when max heat load of tube has been reached, the generator decreases the mA to
the next lower level that the tube can handle
step up transformer
alternating current
primary coil receives voltage from the autotransformer
operates on mutual induction
voltage in the primary coil is boosted to the kV level in the secondary coil
conditions necessary for producing xrays
source of electrons
acceleration of electrons
sudden stop of electrons against target material
,xray tube requires ______ current to operate properly
direct
rectifier
Changes alternating current to direct current
solid state semiconductor diodes
consist of n and p type semiconductors
_________ diodes provides ______wave rectification for single phase power
four; full
_______ diodes provides full wave rectification for three phase power
6 or 12
what does the filament circuit do?
regulates the flow of electrical current to the filament of the x-ray tube
, what is the negative electrode in the tube?
cathode
what are filaments in the cathode made of and why?
tungsten; high melting point
thermionic emission
the release of electrons from the tungsten filament when the electrical current
passes through it and heats the filament
where is the focusing cup located?
cathode
what is the positive electrode in the tube?
anode
what material is the anode made up of?
QUESTIONS AND ANSWERS
Voltage is stepped up or stepped down by only a small amount and sent to the
_______ side of the high voltage step up transformer
primary
Where is the timer in the X-ray circuit?
between autotransformer and high voltage transformer
mAs timers are used with __________ generators
falling load
AEC
fixed kVp, controlled mAs
positioning must be perfect
,what is the shortest time with AEC?
1 ms
falling load generator
RT sets mAs and kVp
when max heat load of tube has been reached, the generator decreases the mA to
the next lower level that the tube can handle
step up transformer
alternating current
primary coil receives voltage from the autotransformer
operates on mutual induction
voltage in the primary coil is boosted to the kV level in the secondary coil
conditions necessary for producing xrays
source of electrons
acceleration of electrons
sudden stop of electrons against target material
,xray tube requires ______ current to operate properly
direct
rectifier
Changes alternating current to direct current
solid state semiconductor diodes
consist of n and p type semiconductors
_________ diodes provides ______wave rectification for single phase power
four; full
_______ diodes provides full wave rectification for three phase power
6 or 12
what does the filament circuit do?
regulates the flow of electrical current to the filament of the x-ray tube
, what is the negative electrode in the tube?
cathode
what are filaments in the cathode made of and why?
tungsten; high melting point
thermionic emission
the release of electrons from the tungsten filament when the electrical current
passes through it and heats the filament
where is the focusing cup located?
cathode
what is the positive electrode in the tube?
anode
what material is the anode made up of?
