Deck 5: X-Ray Equipment

Question 1

When full-wave rectification is applied to three-phase current, a ____ ripple is produced.

A)current
B)star
C)voltage
D)double

Answer 1

voltage

Question 2

All of the following are x-ray tube support systems EXCEPT

A)C-arm.
B)floor-to-ceiling.
C)overhead suspension.
D)fluoroscopic tower.

Answer 2

fluoroscopic tower.

Question 3

Where is the stator of the anode induction motor located?

A)inside the glass envelope but outside the rotor
B)outside the glass envelope and outside the rotor
C)inside the glass envelope and inside the rotor
D)outside the glass envelope but inside the rotor

Answer 3

outside the glass envelope and outside the rotor

Question 4

The exposure switch is found between the

A)incoming line and the circuit breaker.
B)autotransformer and the timer circuit.
C)exposure switch and the step-up transformer.
D)incoming line and the step-down transformer.

Question 5

The electrical device used to adjust the mA selection is a/an

A)autotransformer.
B)stator.
C)diode.
D)variable resistor.

Question 6

How many alterations in the direction of the current flow occur in 0.10 second in a 60 Hz AC current?

A)6
B)12
C)60
D)120

Question 7

When using AEC at 80 kVp, backup times

A)must not exceed 600 mAs.
B)are of no concern due to the AEC reliability.
C)may range from 600 to 2000 mAs.
D)should be manually set at 300% of the expected manual mAs.

Question 8

The kVp control is found between the

A)incoming line and the exposure switch.
B)autotransformer and the timer circuit.
C)exposure switch and the step-up transformer.
D)incoming line and the step-down transformer.

Question 9

The exposure switch on an x-ray machine is intended to

A)initiate the exposure.
B)terminate the exposure.
C)both initiate and terminate the exposure.
D)rotate the anode up to speed.

Question 10

Which tube suspension system offers the greatest multidirectional movement?

A)overhead tube suspension system
B)floor-to-ceiling tube suspension system
C)floor tube suspension system
D)mobile tube suspension system

Question 11

The key advantage of a curved-top radiographic table is the

A)positioning accuracy in oblique and lateral positions.
B)level support of the radiographic film.
C)easy cleanup.
D)smaller object image distance (OID).

Question 12

The incoming line current is supplied

A)in the form of a three-phase power cycle.
B)in the form of a single-phase power cycle.
C)as a direct current.
D)at approximately 60 volts.

Question 13

The time control is found between the

A)incoming line and the exposure switch.
B)autotransformer and the timer circuit.
C)exposure switch and the step-up transformer.
D)incoming line and the step-down transformer.

Question 14

All of the following are radiographer-operated controls EXCEPT

A)kVp selection.
B)timer selection.
C)rotor speed.
D)mA selection.

Question 15

The diagnostic x-ray range is approximately

A)10 to 1,200 mA.
B)0.001 to 10 seconds.
C)25 to 150 kVp.
D)all of the above

Question 16

At what point in the x-ray circuit is the rectification circuit located?

A)between the semiconductors and the valve tubes
B)between the step-down transformer and the rheostat
C)between the step-up transformer and the x-ray tube
D)between the thermionic diode tubes and the x-ray machines

Question 17

The mA control is found between the

A)incoming line and the exposure switch.
B)autotransformer and the timer circuit.
C)exposure switch and the step-up transformer.
D)incoming line and the step-down transformer.

Question 18

To protect the radiographer during x-ray exposures,

A)operator controls are on the high voltage side of the circuit.
B)the exposure switch may be located remotely in the exam room to improve patient safety.
C)release of the switch initiates the exposure sequence.
D)the mA and kVp selections are on the low voltage side of the circuit.

Question 19

Nearly all types of x-ray equipment operate from an incoming line of

A)210 V.
B)120 AC.
C)120 Hz.
D)210 A.

Question 20

Radiographic rooms equipped with a tilting table are primarily designed for performing ____ procedures.

A)extremity
B)surgical x-ray
C)fluoroscopic
D)C-arm

Question 21

All of the following are desired features of radiographic tables EXCEPT

A)variable height to improve patient safety.
B)floating table tops to enhance patient positioning.
C)low abrasion surface to lessen patient slippage as they transfer.
D)carbon fiber material to reduce absorption of x-ray energy.

Question 22

Match the terms related to a typical x-ray circuit with the correct statement or definition.
located between incoming line and exposure switch; determines kVp

A)autotransformer
B)rotor stator
C)filament current
D)three-phase power
E)single-phase power
F)AEC
G)exposure switch
H)rectification circuit

Question 23

Radiographing a thin body part using automatic exposure control (AEC)

A)requires a longer minimum reaction time.
B)is recommended in order to reduce dose.
C)may produce inconsistent images due to AEC timer errors.
D)requires higher kVp values in order to reduce motion.

Question 24

Present-day AEC technology utilizes

A)ionization chamber technology.
B)minimum reaction times as short as 1 ms.
C)a pre-detector AEC chamber position.
D)all of the above

Question 25

When compared to battery-powered portable radiographic units, capacitor discharge mobile units

A)produce an average kVp energy higher than battery units.
B)never need an external electrical source for charging.
C)have a tendency to produce leakage exposure after exposure termination.
D)produce more consistent exposures.

Question 26

What is the approximate rms voltage of a single-phase sine wave with a kVp of 75?

Question 27

A three-phase, rectified current produces a voltage ripple of ____ pulses per Hz.

A)3
B)6
C)9
D)24

Question 28

Match the terms related to a typical x-ray circuit with the correct statement or definition.
regulates exposure time based upon patient thickness and density

A)autotransformer
B)rotor stator
C)filament current
D)three-phase power
E)single-phase power
F)AEC
G)exposure switch
H)rectification circuit

Question 29

When comparing the power rating between two different x-ray generators, it is important to know the type: single phase vs.three-phase.An exposure of 110 kV and 400 mA using a single-phase unit would yield a power rating of what?

Question 30

Match the terms related to a typical x-ray circuit with the correct statement or definition.
two-position device used to initiate exposure

A)autotransformer
B)rotor stator
C)filament current
D)three-phase power
E)single-phase power
F)AEC
G)exposure switch
H)rectification circuit

Question 31

Falling load generators

A)permit higher mA exposures for short exposure times.
B)permit the mA to fall as exposure time increases.
C)are designed to use the highest allowable mA .
D)all of the above

Question 32

What is the approximate rms voltage of a single-phase sine wave with a kVp of 80?

Question 33

High frequency generators

A)use invertors to increase pulse frequency.
B)produce similar output to three-phase with a single phase source.
C)achieve peak kVp faster than single- or three-phase generators.
D)all of the above

Question 34

Automatic exposure control (AEC) technology determines

A)patient thickness.
B)exposure time.
C)kVp.
D)mA.

Question 35

It is important to remember that when making x-ray exposures, a tremendous amount of electrical power is being used to make the exposure.If you compared this to the power consumed in a typical lightbulb, how many 60 W lightbulbs would equate to an x-ray exposure under the following conditions?
300 mA
90 kV
three-phase unit

Question 36

Match the terms related to a typical x-ray circuit with the correct statement or definition.
low-voltage circuit that supplies 3 to 5 amperes

A)autotransformer
B)rotor stator
C)filament current
D)three-phase power
E)single-phase power
F)AEC
G)exposure switch
H)rectification circuit

Question 37

When compared to single-phase electrical current, three-phase power

A)permits shorter exposures.
B)produces 360 pulses per second.
C)produces less voltage ripple.
D)all of the above

Question 38

Match the terms related to a typical x-ray circuit with the correct statement or definition.
produces two pulses of electricity in 0.008 sec

A)autotransformer
B)rotor stator
C)filament current
D)three-phase power
E)single-phase power
F)AEC
G)exposure switch
H)rectification circuit

Question 39

What is the approximate rms voltage of a single-phase sine wave with a kVp of 65?

Question 40

Ancillary equipment for tilting tables includes

A)a footboard.
B)handgrips.
C)shoulder supports.
D)all of the above

Question 41

Match the terms related to a typical x-ray circuit with the correct statement or definition.
yields approximately 40% higher average energy per exposure

A)autotransformer
B)rotor stator
C)filament current
D)three-phase power
E)single-phase power
F)AEC
G)exposure switch
H)rectification circuit

Question 42

Match the following choices with regard to x-ray equipment design and functionality.
excellent x-ray tube positioning flexibility with patients on carts

A)overhead tube suspension system
B)C-arm tube suspension
C)panoramic dental and facial system
D)footboard
E)floor-to-ceiling suspension system
F)shoulder supports
G)upright Bucky unit
H)simulator systems

Question 43

Match the following choices with regard to x-ray equipment design and functionality.
inexpensive tube support design typically seen in small clinics

A)overhead tube suspension system
B)C-arm tube suspension
C)panoramic dental and facial system
D)footboard
E)floor-to-ceiling suspension system
F)shoulder supports
G)upright Bucky unit
H)simulator systems

Question 44

Match the following choices with regard to x-ray equipment design and functionality.
routinely used for chest radiography

A)overhead tube suspension system
B)C-arm tube suspension
C)panoramic dental and facial system
D)footboard
E)floor-to-ceiling suspension system
F)shoulder supports
G)upright Bucky unit
H)simulator systems

Question 45

Match the following choices with regard to x-ray equipment design and functionality.
X-ray tube and image receptor are fixed to opposite ends of an arc design.

A)overhead tube suspension system
B)C-arm tube suspension
C)panoramic dental and facial system
D)footboard
E)floor-to-ceiling suspension system
F)shoulder supports
G)upright Bucky unit
H)simulator systems

Question 46

Match the following choices with regard to x-ray equipment design and functionality.
used by orthodontists to assess the alignment of teeth and jaw disorders

A)overhead tube suspension system
B)C-arm tube suspension
C)panoramic dental and facial system
D)footboard
E)floor-to-ceiling suspension system
F)shoulder supports
G)upright Bucky unit
H)simulator systems

Question 47

Match the following choices with regard to x-ray equipment design and functionality.
required for myelography procedures with the table tilted Trendelenburg

A)overhead tube suspension system
B)C-arm tube suspension
C)panoramic dental and facial system
D)footboard
E)floor-to-ceiling suspension system
F)shoulder supports
G)upright Bucky unit
H)simulator systems