Chapter 4- Assignment Flashcards
The step down transformer is located on the:
a.) primary circuit
b.) secondary circuit
c.) filament circuit
d.) xray tube
c.) filament circuit
The step up transformer is responsible for:
a.) raising current, decreasing voltage
b.) raising voltage, decreasing current
c.) raising current, raising voltage
d.) decreasing current, decreasing voltage
b.) raising .voltage, decreasing current
The technologist chooses the desired kvp setting using the autotransformer through a process called:
a.) mutual induction
b.) self induction
c.) rectification
d.) voltage ripple
b.) self induction
The step up transformer changes voltage through a process called:
a.) mutual induction
b.) self induction
c.) rectification
d.) voltage ripple
a.) mutual induction
The rectifiers role in the xray circuit is to:
a.) convert AC to DC
b.) convert DC to AC
c.) keep a constant AC current
d.) convert high voltage to low voltage
a.) convert AC to DC
Tube current is measured in:
a.) A
b.) mA
c.) voltage
d.) kilo voltage
b.) mA
The solid state rectifier has an ______ acrystal and a ______ crystal.
a.) x and z
b.) a and b
c.) p and n
d.) a and c
c.) p and n
The ampere is the unit of measure for:
a.) resistance
b.) electromagnetism
c.) electric current
d.) electric potential
c.) electric current
The volt is the unit of measure for:
a.) resistance
b.) electromagnetism
c.) electric current
d.) electric potential
d.) electric potential
An adjustable form of a resistot is the
a.) rheostat
b.) switch
c.) capacitor
d.) diode
a.) rheostat
A material that has a large number of free elecrons is the:
a.) conductor
b.) insulator
a.) conductor
The purpose of grounding is to:
a.) provide a source for electricity
b.) neutralize a charged object
c.) replace the circuit breaker
d.) to reprimand a bad circuit
b.) neutralize a charged object
Which of the following materials is a good conductor?
a.) glass
b.) copper
c.) plastic
d.) all of the above
b.) copper
The ability to do work because of a seperation of charges is:
a.) electrostatics
b.) electric potential
c.) resistance
d.) electric current
b.) electric potential
WHen a switch is closed electric current _________ and when a switch is opened electric current _________
a.) stops, flows
b.) stops, turns to AC
c.) becomes AC, becmones DC
d.) flows, stops
d.) flows, stops
Electrostatics is also known as electricity.
a.) true
b.) false
b.) false
A diode allows current to flow in alternating direction.
a.) true
b.) false
b.) false
Highly magnetic materials are known as:
a.) diamagnetic
b.) paramagnetic
c.) ferromagnetic
d.) superdiametic
c.) ferromagnetic
A filament is a tiny coil of wire housed in the cathode at the end of an xray tube.
a.) true
b.) false
a.) true
The step down transformer is responsible for;
a.) raising current, decreasing voltage
b.) raising voltage, decreasing current
c.) raising current, rasing voltage
d.) decreasing current, decreasing voltage
a.) raising current, decreasing voltage
The current passign between the secondary side of the high tension transformers and the rectifiers is best describes as a type of:
a.) high voltage (kv) ac
b.) low voltage ac
c.) high voltage (kV) dc
d.) low voltage dc
a.) high voltage (Kv) AC
A line voltage compensator is incorporated in to the primary circuit of a digital radiographic unit to
a.) compensate for variation of the Mas timer
b.) control the desired speed of the anode
c.) provide the desired filament charge
d.) maintain a constant voltage level
d.) maintain a constant voltage level
The reduction of voltage and development of high amperage by a step down transformer occurs in the:
a.) prmary portion of the circuit
b.) secondary portion of the circuit
c.) high tension portion of the secondary circuit
d.) none of the above
The line voltage compensator is located on the :
a.) primary side of the step up transformer
b.) on the secondary side of the autotransformer
c.) on the secondary side of the filament circuit
d.) on the primary side of the autotransformer
d.) on the primary side of the autotransformer
Which of the following compenents are likely to be found in the primary circuit of a modern xray unit? Choose all that apply.
a.) autotransformer
b.) timer switch
c.) the anode of the xray tube
a.) autotransformer
b.) timer switch
Which of the following devices can be used for the stoagre of electrical charge?
a.) rectifier
b.) transformer
c.) battery
d.) variac
c.) battery
The type of unit to liekly prodice the smallest voltage ripple is a:
a.) full wave signle phase unit
b.) three phase six pulse unit
c.) self rectified unit
d.) high frequency unit
d.) high frequency unit
