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RT – LEVEL II (QUIZ)1. A distinctive characteristic of high-votage radiogra!h" is that#

A. It results in comparatively high subject contrastB. It results in comparatively high radiographic contrastC. It is applicable to comparatively thick or highly absorbing specimensD. All of the above are distinctive characteristics of high-voltage radiography

$. Lead screens are %sed for a&ost a e'!os%res hen %sing#A. The uoroscopic techni!ueB. "o#-voltage radiographyC. $igh-voltage radiographyD. %eroradiography

. *hich of the fooing gasses o%d &ost i+e" ,e %sed as an -Ra" ,arrier

indo on %orosco!ice!uipment&

A. 'yre(B. "ead glassC. )ptical glass

D. Barium o(ide glass

/. *hen vieing a radiogra!h0 an i&age of the ,ac+ of the cassette

s%!eri&!osed on the i&age of the s!eci&en is noted. This is &ost i+e" d%e

to#A. *ndercutB. )vere(posureC. The %-+ay intensity #as too highD. Backscatter

. The haf-va%e a"er of ead for 2o-34 is a!!ro'i&ate" 1 && (4. in). If the

radiation eve on the so%rce side of a 5 && (1. in) ead !ate is 3/ R6h0 theradiation eve on the o!!osite side is#A. , +hB. / /0 +hC. /1 0 +hD. 0 +h

3. *hich of the fooing is not a factor in deter&ining s%,7ect contrastA. 2ature of the specimenB. The radiation !uality usedC. Type of 3lm used

D. Intensity and distribution of the scattered radiation

8. If an e'!os%re ti&e of 34 s and a so%rce-to-9& distance of 1.$ & (/ ft) is

necessar" for a !artic%ar e'!os%re0 hat e'!os%re ti&e o%d ,e needed for

an e:%ivaent e'!os%re if the so%rce-to-9& distance is changed to 1.5 & (3

ft);

A. 4 sB. 56 sC. /07 s

D. 511 s

5. <eveo!er so%tion sho%d ,e discarded hen the :%antit" of re!enisher

added e:%as#A. The original !uantity of developer

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RT – LEVEL II (QUIZ)B. -0 times the original !uantity of developerC. 7-8 times the original !uantity of developerD. /1 times the original !uantity of developer

>. If a s!eci&en is radiogra!hed at /4 +V and again at 4 +V ith ti&e

co&!ensation to give the

  radiogra!hs the sa&e densit"0 hich of the fooing state&ents o%d ,etr%e;A. The 51 k9 e(posure #ould have a lo#er contrast and a greater latitude than the 71

k9 e(posureB. The 51 k9 e(posure #ould have a higher contrast and a greater latitude than the 71

k9 e(posureC. The 71 k9 e(posure #ould have a lo#er contrast and a greater latitude than the 51

k9 e(posureD. The 71 k9 e(posure #ould have a higher contrast and a greater latitude than the 51

k9 e(posure

14. A $4 +V! -Ra" &achine %sed in con7%nction ith a ead foi screen hasan a!!ro'i&ate !ractica thic+ness i&it of#A. 0, mm :/.7 in; of steel or its e!uivalentB. 7/ mm : in; of steel or its e!uivalentC. /7 cm :8 in; of steel or its e!uivalentD. /6 cm :4.7 in; of steel or its e!uivalent

11. The degree of concentration of the radioactive &ateria in a ga&&a ra"

so%rce is referred to as the#A. <peci3c activity of the sourceB. =uality of the source

C. Atomic #eight of the sourceD. $alf-life of the source

1$. In &iion-vot radiogra!h"0 9tration at the t%,e#A. Increases the generation of short #avelength %-+aysB. Decreases the generation of short #avelength %-+aysC. Improves the radiographic !uality by decreasing scatter radiationD. )>ers no improvement in radiographic !uality

1. *hie %sing an -Ra" t%,e for radiogra!h"0 the o!erator ants to increase

the radiation intensit". To do so the#A. ?ilovoltage should be lo#ered

B. Tube current should be increasedC. Test specimen should be moved further from the 3lmD. Tube current should be decreased

1/. Lead screens are !%t in direct contact ith the 9& to#A. Increase the photographic action on the 3lmB. Absorb the longer #avelength scattered radiationC. Intensify the photographic e>ect of the primary more than the scattered radiationD. Do all the above

1. The &ain !%r!ose of the -Ra" generator contros on the e:%i!&ent is to#A. @aintain the direction and #idth of the %-+ay beamB. nable the operator to obtain the intensity !uality and duration of e(posure desiredC. Allo# the operator to adjust ilm ocal Distance remotelyD. Change alternating current to increase %-+ay intensity

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RT – LEVEL II (QUIZ)

13. *hen -Ra"s0 ga&&a ra"s0 ight0 or eectrons stri+e the !hotogra!hic

e&%sion0 a change ta+es !ace in  the silver halide crystals. This change is called.A. 'hotographic densityB. 'hotographic sensitivity

C. "atent imageD. Characteristic curve

18. If .8 ?@: (1 2i) of Ir-1>$ !rod%ces a dose rate of 0>44 &R6h at 4. & (1

ft)0 ho &an" &R i 0844  B! :/1 Ci; produce at the same distance&A. 761B. 761111C. 76D. 76111

15. *ith res!ect to :%ait"0 hat three factors &%st ,e considered in

seecting a so%rce-to-9& distance;A. <ource activity type of 3lm type of screensB. <ource activity siEe of 3lm thickness of materialC. <ource siEe source activity specimen-to-3lm distanceD. <ource siEe specimen thickness geometric unsharpness

1>. n a radiogra!h of a !i!e ed0 there is a ver" ight irreg%ar"-sha!ed

s&a i&age in the ed. This  i&age o%d &ost i+e" ,e d%e to the !resence of#A. 'orosityB. <lag inclusion

C. Tungsten inclusionD. Inade!uate buildup

$4. A arge !h"sica siBe so%rce &a" !rod%ce an e:%ivaent :%ait" radiogra!h

if#A. The source-to-3lm distance is increasedB. @ore backing lead is usedC. A faster 3lm is usedD. (posure time is decreased

$1. 2o-> ,eco&es 2o-34 hen it is !aced in a n%cear reactor here it

ca!t%res#A. An electronB. A neutronC. A protonD. Contamination

$$. *hen a faster s!eed 9& is s%,stit%ted for a soer one to i&!rove the

econo&ics of the e'!os%re0  #hich of the follo#ing conditions occur&A. The 3lm must receive special processingB. The de3nition #ill improveC. The image resolution #ill be reducedD. 2one of the above #ill be e(perienced

$. The a,iit" of a &ateria to ,oc+ or !artia" ,oc+ the !assing of -Ra"s

and ga&&a ra"s is caed#A. 'enetration

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RT – LEVEL II (QUIZ)B. AbsolutionC. AbsorptionD. "atitude

$/. The range of s!eci&en thic+ness that can ,e ade:%ate" recorded on the

radiogra!h is caed#

A. <ensitivity of the radiographB. "atitude of the radiographC. Accuracy of the radiographD. Intensity of the source

$. A!!ro'i&ate" ho ong o%d it ta+e for a 84 ?@: (14 2i) 2o-34 so%rce

to deca" to > ?@: ($. 2i);A. 7.0 daysB. 7.0 yearsC. /1.8 yearsD. 2one of the above

$3. Radiogra!hic %nderc%tting is ca%sed ,"#A. <ide scatterB. 'oor geometryC. "ead screensD. ree electrons

$8. The haf-ife of radioactive 2s-18 is nearest to#A. 08 daysB. 8 yearsC. 01 yearsD. 78 days

$5. The correct e:%ation for deter&ining geo&etric %nshar!ness 0 is#

 

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