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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