Post on 04-Jun-2018
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CHAPTER 5X-RAY EQUIPMENT
TRUE/FALSE
1. Therapeutic equipment operates at much lower energies than diagnostic equipment.
ANS: F DIF: Easy
. Therapy equipment operates at high !oltages and low amperages.
ANS: T DIF: Easy
". Floating tops can #e mo!ed when an electromagnetic #ra$e is engaged.
ANS: F DIF: Easy
%. The telescoping column o& the o!erhead suspension system controls hori'ontal mo!ement.
ANS: F DIF: Easy
(. A head unit consists o& a #uc$y tray and an )*ray tu#e.
ANS: T DIF: +edium
,. In the -nited States the incoming line !oltage to an )*ray unit is appro)imately 1/ !olts.
ANS: F DIF: Easy
0. The root mean square !oltage o& a single*phase sinusoidal wa!e is usually gi!en as 0/.0 o& the pea$
!oltage.
ANS: T DIF: +edium
2. During three*phase power the o!erall potential di&&erence drops to 'ero.
ANS: F DIF: Easy
MULTIPLE CHOICE
1. 3ow many alterations in the direction o& the current &low occur per second in a ,/*3' A4 current5
a. / c. 6/
#. ,/ d. 1/
ANS: D DIF: +edium
. At what point in the )*ray circuit is the recti&ication circuit located5
a. #etween the semiconductors and the !al!e tu#es
#. #etween the step*down trans&ormer and the rheostat
c. #etween the step*up trans&ormer and the )*ray tu#e
d. #etween the thermionic diode tu#es and the )*ray machines
ANS: 4 DIF: +edium
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". 7here is the stator o& the anode induction motor located5
a. inside the glass en!elope #ut outside the rotor
#. outside the glass en!elope and outside the rotor
c. inside the glass en!elope and inside the rotor
d. outside the glass en!elope #ut inside the rotor
ANS: 8 DIF: +edium
%. The e)posure switch on an )*ray machine is intended to 9999.a. initiate the e)posure
#. terminate the e)posure
c. #oth initiate and terminate the e)posure
d. rotate the anode up to speed
ANS: A DIF: +edium
(. The e)posure switch is &ound #etween the 9999.
a. incoming line and the circuit #rea$er
#. autotrans&ormer and the timer circuitc. e)posure switch and the step*up trans&ormer
d. incoming line and the step*down trans&ormer
ANS: 8 DIF: +edium
,. The electrical de!ice used to adust the mA selection is the 9999.
a. autotrans&ormer c. switch
#. stator d. !aria#le resistor
ANS: D DIF: Easy
0. The time control is &ound #etween the 9999.
a. incoming line and the e)posure switch
#. autotrans&ormer and the timer circuit
c. e)posure switch and the step*up trans&ormerd. incoming line and the step*down trans&ormer
ANS: D DIF: +edium
2. The mA control is &ound #etween the 9999.a. incoming line and the e)posure switch
#. autotrans&ormer and the timer circuit
c. e)posure switch and the step*up trans&ormer
d. incoming line and the step*down trans&ormer
ANS: D DIF: +edium
6. The $;p control is &ound #etween the 9999.a. incoming line and the e)posure switch
#. autotrans&ormer and the timer circuitc. e)posure switch and the step*up trans&ormer
d. incoming line and the step*down trans&ormer
ANS: A DIF: +edium
1/. +edical )*ray units can #e classi&ied as 9999.
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a. diagnostic c. &luoroscopic
#. therapeutic d. #oth a and #
ANS: D DIF: Easy
11. The diagnostic )*ray range is appro)imately 9999.
a. 1/ to 1// mA c. ( to 1(/ $;p#. /.//1 to 1/ seconds d. all o& the a#o!e
ANS: D DIF: Easy
1. The ad!antage o& a cur!ed top radiographic ta#le is 9999.
a. positioning accuracy in o#lique and lateral positions
#. le!el support o& the radiographic &ilm
c. easy clean up
d. a smaller o#ect image distance
ANS: D DIF: +edium
1". The 8uc$y tray consists o& 9999.
a. a mo!ing 1% < 10 inch grid c. a mo!ing 10 < 10 inch grid
#. a stationary 1% < 10 inch grid d. a stationary 10 < 10 inch grid
ANS: 4 DIF: +edium
1%. =adiographic ta#le tops may #e 9999.
a. &loating c. motor dri!en
#. stationary d. all o& the a#o!e
ANS: D DIF: +edium
1(. =adiographic rooms equipped with a tilting ta#le are primarily designed &or per&orming 9999
procedures.
a. diagnostic c. &luoroscopic
#. angiographic d. #oth a and c
ANS: D DIF: Easy
1,. The height o& the a!erage radiographic ta#le top to the &loor is 9999 inches.
a. ( c. ,/
#. %/ d. 1/
ANS: 8 DIF: Easy
10. Tu#e suspension systems include 9999.
a. o!erhead c. 4*arm
#. mo#ile d. all o& the a#o!e
ANS: D DIF: +edium
12. 7hich tu#e suspension system o&&ers the greatest multidirectional mo!ement5
a. o!erhead tu#e suspension system c. &loor tu#e suspension system
#. &loor*to*ceiling tu#e suspension system d. mo#ile tu#e suspension system
ANS: A DIF: +edium
16. The incoming line current is supplied 9999.
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a. in the &orm o& a three*phase power cycle
#. in the &orm o& a single*phase power cycle
c. as a direct current
d. at appro)imately ,/ !olts
ANS: A DIF: Easy
/. Nearly all )*ray equipment operates &rom an incoming line o& 9999.
a. 1/ ; c. 1/ 3'
#. 1/ A4 d. 1/ A
ANS: A DIF: Easy
1. 7hen &ull*wa!e recti&ication is applied to three*phase current a 9999 ripple is produced.
a. wye c. !oltage
#. star d. delta
ANS: 4 DIF: +edium
. A three*phase recti&ied current produces a !oltage ripple o& 9999 pulses per 3'.
a. " c. 6
#. , d. %
ANS: 8 DIF: +edium
". A star or delta connection is used to 9999.
a. tap a single phase o& power c. produce recti&ication
#. com#ine three*phase current d. drop the wa!e pea$ to 'ero
ANS: 8 DIF: +edium
PROBLEM
1. 7hat is the appro)imate rms !oltage o& a single*phase sine wa!e with a $;p o& ,(5
ANS:
%(.6 $;p
DIF: Di&&icult
. 7hat is the appro)imate rms !oltage o& a single*phase sine wa!e with a $;p o& 0(5
ANS:
("./ $;p
DIF: Di&&icult
". 7hat is the appro)imate rms !oltage o& a single*phase sine wa!e with a $;p o& 2/5
ANS:
(,., $;p
DIF: Di&&icult