Upgrade to remove ads
Only $2.99/month

Russ Exam #3

Terms in this set (29)

The role of the autotransformer in the Xray circuit is:
to send voltage to the primary side of the step-up transformer
The autotransformer is located ________ in the Xray circuit.
between the AC source and the primary coil of the step-up transformer
The autotransformer works on the principle of:
self-induction
In the autotransformer the number of turns on the _______ side is fixed and the number of turns on the ______ side can be regulated.
primary, secondary
The autotransformer serves as a _____ selector.
kVp
The autotransformer law is the same as:
the transformer law
A variable resistor that allows us to vary the resistance of a circuit control voltage by changing the electrical energy into heat is a _______.
rheostat
The rheostat decreases the voltage in an Xray circuit by:
increasing resistance
The high voltage step-up transformer increases voltage _____ times.
500-1000
A device used to regulate voltage which can be effectively used in Radiation Therapy is:
rheostat
The difference in the waveform between the primary and secondary sides of a high voltage transformer is the
amplitude
The process of changing alternating current to direct current is:
rectification
In an Xray circuited that is self-rectified, how many rectifier diodes are used excluding the tube itself?
0
All rectifying in the Xray circuit are between the secondary coil of the step-up transformer and the:
Xray tube
When the current leaves the rectification circuit and enters the Xray tube, it is:
direct current
Diodes in the alternating current circuit allow electrons to flow:
in one direction
Suppressing the reverse bias on alternating current results in:
half-wave rectification
Changing the reverse bias to forward bias results in:
full-wave rectification
The current in the Xray circuit needs to be rectified before reaching the Xray tube because:
Xray tubes operate best with DC
When the radiographer selects kilovoltage on the control panel, which device is adjusted?
Autotransformer
The first component to receive power in the Xray circuit is the:
Autotransformer
The Xray timer is located in series with the:
primary side of the step-up transformer
The kilovoltmeter is located in parallel with the:
primary side of the step-up transformer
The milliameter is located in series with the:
secondary side of step-up transformer
Three-phase power consists of three waves of alternating current at _____ degrees apart from each other.
120
High frequency current ripple:
<1%
Three-phase 12 pulse current ripple:
4%
Three-phase 6 pulse current ripple:
13%
Rectified alternating current ripple:
100%
YOU MIGHT ALSO LIKE...