UT Level I Questions.doc

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UT Level I Questions UT Level I Questions 1.

1. The indication on the cathode ray The indication on the cathode ray tube (CRTtube (CRT) which represents the f) which represents the far boundary ofar boundary of The aterial bein! tested is called"

The aterial bein! tested is called" a. #ash

a. #ash b.

b. The initial pauseThe initial pause c.

c. The The ain ain ban!ban! d.

d. The bac$ The bac$ surface reflsurface reflectionection %.

%. In iersion testin!& the position of the search unit is In iersion testin!& the position of the search unit is often varied to transit soundoften varied to transit sound into the test part

into the test part at various an!les to tat various an!les to the front surface. he front surface. 'uch a procedure is referred 'uch a procedure is referred to as"to as" a. n!ulation

a. n!ulation b.

b. ispersionispersion c.

c. Reflection Reflection testin!testin! d. Refraction

d. Refraction *.

*. The cable that connects the ultThe cable that connects the ultrasonic instruent to trasonic instruent to the search unit is specihe search unit is specially desi!ned soally desi!ned so that one conductor is centered insi

that one conductor is centered inside another. de another. The technical nae for such The technical nae for such a cable is"a cable is" a.

a. +, +, cablecable b.

b. ConduitConduit c.

c. Coa-ial Coa-ial cablecable d.

d. Ultrasonic Ultrasonic conductor cable!rade conductor cable!rade %/%/ 0.

0. The process of copariThe process of coparin! an instruent or device to a n! an instruent or device to a standard is called"standard is called" a. n!ulation a. n!ulation b. b. CalibrationCalibration c. ttenuation c. ttenuation d. Correlation d. Correlation .

. nother nae nother nae for a copresfor a copressional wave is"sional wave is" a.

a. Lab Lab wavewave b.

b. 'hear wave'hear wave c.

c. Lon!itudinal Lon!itudinal wavewave d.

d. TransversTransverse e wavewave 2.

2. nother nae nother nae for Raylei!h waves for Raylei!h waves is"is" a.

a. 'hear 'hear waveswaves b.

b. Lon!itudinal wavesLon!itudinal waves c. Transverse waves c. Transverse waves d.

d. 'urface 'urface waveswaves 3.

3.   aterial used between the face of a search unit and the test surface to perit theaterial used between the face of a search unit and the test surface to perit the

transission of ultrasonic vibrations fro the search unit to the aterial bein! tested is called" transission of ultrasonic vibrations fro the search unit to the aterial bein! tested is called" a.

a.   wettin! a!entwettin! a!ent b.

b.   couplantcouplant c.

c. n n acoustic tracoustic transitter ansitter d.

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4.

4. The pie5oelectric aterial in The pie5oelectric aterial in a search unit which vibrata search unit which vibrates to produce ultrasonic waves ies to produce ultrasonic waves iss called a"

called a" a.

a. +ac$in! +ac$in! aterialaterial b.

b. Lucite wed!eLucite wed!e c. Crystal

c. Crystal d. Couplant d. Couplant 6.

6. Ultrasonic testin! of aterial where the search unit is Ultrasonic testin! of aterial where the search unit is in direct contact with the aterial bein!in direct contact with the aterial bein! tested ay be"

tested ay be" a.

a. 'trai!ht 'trai!ht bea bea testin!testin! b.

b. 'urface wave testin!'urface wave testin! c.

c. n!le n!le bea tesbea testin!tin! d.

d. ll ll of the of the aboveabove 1/.

1/. n advanta!e of usin! lin advanta!e of usin! lithiu sulfate in sthiu sulfate in search units is that earch units is that it"it" a.

a. Is one of the Is one of the ost efficient !eneratorost efficient !enerators of ultrasonic ener!ys of ultrasonic ener!y b.

b. Is one of the ost efficient receivers of ultIs one of the ost efficient receivers of ultrasonic ener!yrasonic ener!y c.

c. Is Is insolubleinsoluble d.

d. Can withstand teperCan withstand teperatures as hi!h atures as hi!h as 3//7C (1&%2/7 as 3//7C (1&%2/7 8)8) 11.

11. The search unit shown iThe search unit shown in 8i!ure 1 is used fn 8i!ure 1 is used for"or" a.

a. 'urface 'urface wave wave testin!testin! b.

b. n!le bea testin!n!le bea testin! c.

c. Iersion Iersion testin!testin! d.

d. 'trai!ht 'trai!ht bea tbea testin!estin! 1%.

1%. 9hich of the fol9hich of the followin! search units would contain tlowin! search units would contain the thinnest :uart5 crysthe thinnest :uart5 crystal;al; a.

a.   1 <#5 search 1 <#5 search unitunit b.

b.    <#5 search unit <#5 search unit c.

c.   1 <#5 search 1 <#5 search unitunit d.

d.   % <#5 search % <#5 search unitunit 1*.

1*.   % <#5 search unit would % <#5 search unit would ost li$ely be used durin!"ost li$ely be used durin!" a.

a. 'trai!ht 'trai!ht bea contact bea contact testin!testin! b.

b. Iersion testin!Iersion testin! c.

c. n!le n!le bea contact bea contact testin!testin! d.

d. 'urface wave 'urface wave contact tescontact testin!tin! 10.

10. The aount of bea diver!The aount of bea diver!ence fro a crystal is ence fro a crystal is priarily dependent on the"priarily dependent on the" a.

a. TyType of pe of testtest b.

b. Ti!htness Ti!htness of crystal bac$in! in the search unitof crystal bac$in! in the search unit c.

c. 8re:uency and 8re:uency and crystal crystal si5esi5e d.

d. =ulse =ulse len!thlen!th 1.

1. 9hen an ultrasonic bea pas9hen an ultrasonic bea passes throu!h the interface between two ses throu!h the interface between two dissiilar dissiilar aterials at anaterials at an an!le& a new an!le of sound travel ta$es place in the second aterial due to"

an!le& a new an!le of sound travel ta$es place in the second aterial due to" a. ttenuation a. ttenuation b. b. RarefactionRarefaction c. Copression c. Copression d. Refraction d. Refraction

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>?T@" Usin! 8i!ure %& answer :uestions 12 throu!h %/.

12. 8i!ure % illustrates a contact test on an %/ c. (4 in.) aluinu bloc$.  discontinuity is located 1 c. (2 in.) fro the front surface. The screen representation for this is shown to the ri!ht. 9hat does indication  represent;

a. Initial pulse or front surface indication b. 8irst discontinuity indication

c. 8irst bac$ surface reflection d. >one of the above

13. In 8i!ure %& what does indication + represent; a. Initial pulse or front surface indication

b. 8irst discontinuity indication c. 8irst bac$ surface reflection d. >one of the above

14. In 8i!ure %& what does indication C represent; a. 'econd bac$ surface reflection

b. 8irst discontinuity indication c. 'econd discontinuity indication d. 8irst bac$ surface reflection

16. In 8i!ure %& what does indication  represent; a. 8irst discontinuity indication

b. 'econd indication of the discontinuity c. 8irst bac$ surface reflection

d. 'econd bac$ surface reflection

%/. In 8i!ure %& what does indication @ represent; a. 8irst discontinuity indication

b. 'econd discontinuity indication c. 8irst bac$ surface reflection d. 'econd bac$ surface reflection

%1. The velocity of surface waves is appro-iately AAAAAAAAAAA the velocity of shear waves in the sae aterial;

a. Two ties b. 8our ties

c. B d. 61/

>?T@" Usin! 8i!ure *& answer :uestions %% throu!h %2.

%%. 8i!ure * illustrates an iersion test of a 32  (* in) bloc$ of aluinu with a

discontinuity located 1  (% in) below the surface. The screen pattern is shown also. 9hat does indication  represent; ssue no sweep delay is used.

a. 8irst front surface indication b. Initial pulse

c. 8irst discontinuity indication d. 8irst bac$ surface reflection

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%*. In 8i!ure *& indication + represents the" a. 8irst front surface indication

b. Initial pulse

c. 8irst bac$ surface reflection d. 8irst discontinuity indication

%0. In 8i!ure *& indication C represents the" a. 8irst front surface indication

b. 8irst discontinuity indication c. 8irst bac$ surface reflection d. 'econd front surface indication

%. In 8i!ure *& indication  represents the" a. 8irst discontinuity indication

b. 8irst bac$ surface reflection c. 'econd front surface indication d. 'econd discontinuity indication

%2. In 8i!ure *& the distance between indications  and + represents"

a. The distance fro the front surface of the aluinu bloc$ to the discontinuity

b. The distance fro the front surface of the aluinu bloc$ to the bac$ surface of the aluinu bloc$

c. The water distance fro the search unit to the aluinu bloc$ d. >one of the above

%3. Under ost circustances& which of the followin! fre:uencies would result in the best resolvin! power;

a. 1 <#5 b.  <#5 c. 1/ <#5 d. % <#5

%4. 9hich of the followin! aterials of the sae alloy is ost li$ely to produce the !reatest aount of sound attenuation over a !iven distance;

a.  hand for!in!

b.  coarse!rained castin! c. n e-trusion

d. The attenuation is e:ual in all aterials

%6. In contact testin!& the entry surface indication is soeties referred to as" a. The initial pulse

b. The ain ban! or transitter pulse c. +oth a and b

d. >one of the above

*/.  screen pattern containin! a lar!e nuber of lowlevel indications (often referred to as DhashE) could be caused by"

a.  crac$

b.  lar!e inclusion

c. Coarse!rained aterial d.  !as poc$et

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*1.  test ethod eployin! two separate search units on opposite surfaces of the aterial bein! tested is called"

a. Contact testin!

b. 'urface wave testin!

c. Throu!htransission testin! d. Lab wave testin!

*%. The nuber of coplete waves which pass throu!h a !iven point in a !iven period of tie (usually 1 s.) is referred to as the"

a. plitude of a wave otion b. =ulse len!th of a wave otion

c. 8re:uency of a wave otion d. 9avelen!th of a wave otion

**. The boundary between two different aterials which are in contact with each other is called" a.  rarefactor

b.  refractor c. n interface d.  ar$er

*0. 9hen the otion of the particles of a ediu is parallel to the propa!ation& the wave bein! transitted is called a"

a. Lon!itudinal wave b. 'hear wave

c. 'urface wave d. Lab wave

*. 9hen the otion of the particles of a ediu is transverse to the direction of propa!ation& the wave bein! transitted is called a"

*2. D% illion cycles per secondE can also be stated as" a. % $#5

b. %// $#5 c. % <#5 d. % icro#5

*3. <ovin! a search unit over a test surface either anually or autoatically is referred to as" a. 'cannin!

b. ttenuatin! c. n!ulatin! d. Resonatin!

*4.  ter used in ultrasonics to e-press the rate at which sound waves pass throu!h various substances is"

a. 8re:uency b. Felocity

c. 9avelen!th d. =ulse len!th

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*6. 9hen a vertical indication has reached the a-iu si!nal hei!ht which can be displayed on the CRT of an ultrasonic instruent& the indication is said to have reached its"

a. istance aplitude hei!ht b. bsorption level

c. Fertical level

d. Liit of resolution

0/. n ultrasonic testin! techni:ue in which the transducer eleent is not parallel to the test surface is called"

a. n!le bea testin! b. Iersion testin!

c. Contact testin!

d. Throu!htransission testin!

>?T@" Usin! 8i!ure 0& answer :uestions 01 throu!h 0*. 01. In 8i!ure 0& an!le 1 (G1) is called"

a. The an!le of incidence b. The an!le of reflection c. The an!le of refraction d. >one of the above

0%. In 8i!ure 0& an!le % (G%) is called" a. The an!le of incidence

b. The an!le of reflection c. The an!le of refraction d. >one of the above

0*. In 8i!ure 0& an!le * (G*) is called" a. The an!le of incidence

b. The an!le of reflection c. The an!le of refraction d. >one of the above

00. <ost coercial ultrasonic testin! is accoplished usin! fre:uencies between" a. 1 and % $#5

b. 1 and 1&/// $#5 c. /.% and % <#5 d. 1 and 1// <#5

0. In an scan presentation& the hori5ontal base line represents" a. The aount of reflected ultrasonic sound ener!y

b. The distance traveled by the search unit c. The tie or distance

02. In an scan presentation& the aplitude of vertical indications on the screen represents the" a. ount of ultrasonic sound ener!y returnin! to the search unit

b. istance traveled by the search unit c. Thic$ness of aterial bein! tested

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03. 9hich of the followin! test fre:uencies would !enerally provide the best penetration in a */ c (1% in) thic$ specien of coarse!rained steel;

a. 1 <#5 b. %.% <#5

c.  <#5 d. 1/ <#5

04. In a basic ultrasonic test pattern (scan) for contact testin! (assuin! no sweep delay is used)& the initial pulse"

a. Is the hi!h indication on the e-tree left side of the screen that represents the entry surface of the inspected part

b. Is the first pulse that occurs near the ri!ht side of the screen and represents the opposite boundary of the inspected part

c. Is an indication that appears and disappears durin! screenin! d. Is always the second pulse fro the left on the viewin! screen

06. n ultrasonic test usin! a strai!ht bea contact search unit is bein! conducted throu!h the thic$ness of a flat part such as a plate. This test should detect"

a. Lainartype flaws with inor diensions parallel to the rolled surface

b. Transversetype flaws with aHor diensions at ri!ht an!les to the rolled surface

c. Radial flaws with aHor diensions alon! the len!th but radially oriented to the rolled surface d. >one of the above

/. In ultrasonic testin!& a li:uid couplin! ediu between the crystal surface and the part surface is necessary because"

a. Lubricant is re:uired to inii5e wear on the crystal surface

b. n air interface between the crystal surface and the part surface would alost copletely reflect the ultrasonic vibrations

c. The crystal will not vibrate if placed directly in contact with the surface of the part bein! inspected

d. The li:uid is necessary to coplete the electrical circuit in the search unit

1. @ntry surface resolution is a characteristic of an ultrasonic testin! syste which defines its ability to"

a. etect discontinuities oriented in a direction parallel to the ultrasonic bea

b. etect discontinuities located in the center of a for!in! containin! a fine etallur!ic structure c. etect inute surface scratches

d. etect discontinuities located Hust beneath the entry surface in the part bein! tested

%. urin! ultrasonic testin! by the iersion ethod& it is fre:uently necessary to an!ulate the search unit when a discontinuity is located in order to"

a. void a lar!e nuber of bac$ reflections that could interfere with a noral test pattern

b. ?btain a a-iu response if the discontinuity is not ori!inally oriented perpendicular to the ultrasonic bea

c. ?btain the a-iu nuber of entry surface reflections

d. ?btain a discontinuity indication of the sae hei!ht as the indication fro the flat botto hole in a reference bloc$

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*. ll other factors bein! e:ual& which of the followin! odes of vibration has the !reatest velocity; a. 'hear wave b. Transverse wave c. 'urface wave d. Lon!itudinal wave

0. ?n the area aplitude ultrasonic standard test bloc$s& the flat botto holes in the bloc$ are" a. ll of the sae diaeter

b. ifferent in diaeter& increasin! by /.0  (/./12 in) increents fro the >o. D1E bloc$ to the >o. D4E bloc$

c. Lar!est in the >o. D1E bloc$ and sallest in the >o. D4E bloc$ d. rilled to different depths fro the front surface of the test bloc$

. In iersion testin!& verification that the search unit is noral to a flat entry surface is indicated by"

a. <a-iu reflection fro the entry surface b. @liination of water ultiples

c. =roper wavelen!th

d. <a-iu aplitude of the initial pulse 2.  pie5oelectric aterial can"

a. Convert a echanical strain to an electrical output b. Convert an electrical pulse to a echanical strain

c. +e used in the construction of search units d. +e all of the above

3. 'ound waves of a fre:uency beyond the hearin! ran!e of the huan ear are referred to as ultrasonic waves or vibrations& and the ter ebraces all vibrational waves that are !reater than appro-iately"

a. % $#5 b. %// $#5

c. %/&/// $#5 d. % <#5

4. The velocity of sound waves is priarily dependent on" a. The pulse len!th

b. The fre:uency

c. The aterial in which the sound is bein! transitted and the ode of vibration d. >one of the above

6.  disadvanta!e of usin! natural :uart5 in a search unit is that" a. It will dissolve in water

b. It is the least effective !enerator of ultrasonic ener!y of all coonly used aterials c. It is echanically and electrically unstable

d. It easily loses its operatin! characteristics as it a!es

2/. n advanta!e of usin! a ceraic transducer in search units is that it" a. Is one of the ost efficient !enerators of ultrasonic ener!y

b. Is one of the ost efficient receivers of ultrasonic ener!y c. #as a very low echanical ipedance

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21. The priary purpose of reference bloc$s is to"

a. id the operator in obtainin! a-iu bac$ reflections b. ?btain the !reatest sensitivity possible fro an instruent

c. ?btain a coon reproducible si!nal d. >one of the above

2%. 9hen testin! by the surface wave ethod& patches of oil or dirt on the surface ay" a. +loc$ the pro!ress of all sound

b. ttenuate the sound c. #ave no effect on the test

d. Cause both an attenuation of sound and indications on the screen 2*. In iersion testin!& the ost coonly used couplant is" a. 9ater

b. ?il c. lycerin d. lcohol

20. The pie5oelectric aterial in the search unit" a. Converts electrical ener!y to echanical ener!y b. Converts echanical ener!y to electrical ener!y

c. +oth a and b d. >either a nor b

2. 9hich of the followin! fre:uencies will produce the shortest wavelen!th pulse; a. 1 <#5

b.  <#5 c. 1/ <#5 d. % <#5

22. The an!le of incidence is"

a. reater than the an!le of reflection b. Less than the an!le of reflection

c. @:ual to the an!le of reflection d. >ot related to the an!le of reflection

23. ?n any ultrasonic testin! instruents& an operator conductin! an iersion test can reove that portion of the screen presentation that represents water distance by adHustin! a" a. =ulse len!th control

b. ReHect control

c. 'weep delay control d. 'weep len!th control

24. D1//&// cycles per secondE can be written" a. /.1 $#5

b. 1/ $#5 c. 1// $#5 d. 1// <#5

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26. 8i!ure  is an illustration of a typical" a. scan

b. +scan c. Cscan d. scan

3/. 8i!ure 2 is an illustration of a typical" a. scan

31. 8i!ure 3 is an illustration of a typical" a. scan

3%.  search unit with a fre:uency !reater than 1/ <#5 will ost li$ely be used durin!" a.  strai!ht bea contact testin! of aluinu in!ot

b. n an!le bea contact test of a steel pipe c.  surface wave contact test of a etallic plate d. n iersion test

3*. The reference holes in a standard aluinu area aplitude ultrasonic test bloc$s contain" a. 8lat botto holes

b. Concavesurface holes c. Conve-surface holes d. Conicalshaped holes

30. The !radual loss of sonic ener!y as the ultrasonic vibrations travel throu!h the aterial is referred to as"

a. Reflection b. Refraction

c. Reproducibility d. ttenuation

3.  ter used to describe nuerous indications on the cathode ray tube screen resultin! fro test part structure& nuerous sall discontinuities& or both is often referred to as"

a. <ultiple bac$ reflections b. <ultiple front reflections

c. #ash

d. Resonance

32. 9hen testin! a plate& increasin! the fre:uency of an ultrasonic lon!itudinal wave will result in"

a. n increase in its velocity b.  decrease in its velocity

c. >o chan!e in its velocity d.  reversal in its velocity

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33. Ultrasonic waves transitted into and received fro the test aterial in the for of repetitive bursts of acoustic ener!y is called"

a. =ulse echo testin!

b. Continuous wave testin! c. Resonance testin!

34. <etal bloc$s which contain one or ore drilled holes to siulate discontinuities are called" a. 'crubbers

b. Crystal colliators c. 'in!le plane an!ulators d. Reference bloc$s

36. If the aHor diensions of a discontinuity in a 1 c (2 in) thic$ aluinu plate lie parallel to the entry surface at a depth of 32  (* in)& it will be best detected by"

a.  strai!ht bea test b. n an!le bea test

c.  surface wave test d.  Lab wave test

4/. The presence of a discontinuity will not produce a specific discontinuity indication on the CRT screen when usin! the"

a. 'trai!ht bea testin! ethod b. 'urface wave testin! ethod

c. n!le bea testin! ethod

d. Throu!htransission testin! ethod

41. The depth of a discontinuity cannot be deterined when usin! the" a. 'trai!ht bea testin! ethod

b. Throu!htransission testin! ethod c. n!le bea testin! ethod

d. Iersion testin! ethod

4%. 9hen inspectin! coarse!rained aterial& which of the followin! fre:uencies will !enerate a sound wave that will be ost easily scattered by the !rain structure;

a. 1 <#5 b. %.% <#5

c.  <#5 d. 1/ <#5

4*. 9hich of the followin! search units would contain the thic$est crystal; a.  1 <#5 search unit

b.   <#5 search unit c.  1 <#5 search unit d.  % <#5 search unit

40. 9hen perforin! a surface wave test& indications ay result fro" a. 'urface discontinuities

b. ?il on the surface c. irt on the surface d. ll of the above

(12)

4. 9hich of the followin! discontinuities located 1 c (2 in) fro the entry surface would result in the lar!est CRT indication if all factors e-cept discontinuity and orientation are the sae;

a.  %  (/./4 in) diaeter flatsurfaced discontinuity whose aHor face is at an an!le of 3(fro the direction of sound bea propa!ation

b.  %  (/./4 in) diaeter rou!hsurfaced discontinuity whose aHor face is at an an!le of 3(fro the direction of sound bea propa!ation

c.  %  (/./4 in) diaeter flatsurfaced discontinuity whose aHor face is perpendicular to the direction of sound bea propa!ation

d.  %  (/./4 in) diaeter rou!hsurfaced discontinuity whose aHor face is parallel to the direction of sound bea propa!ation

42. 'earch units constructed with a plastic wed!e or standoff between the transducer eleent and the test piece are coonly used for"

a. ual transducer strai!ht bea contact testin! b. n!le bea contact testin!

c. 'urface wave contact testin! d. ll of the above

43.  search unit containin! three or ore individual transducer eleents is often referred to as" a.  dual transducer

b.  sandwich transducer c.  osaic transducer d. >one of the above

44. 'ound can be focused by eans of special curved adapters located in front of the transducer eleent. These adapters are referred to as"

a. 'crubbers

b. coustic lenses c. n!le bea adapters d. 'in!le plane adapters

46.  test ethod in which the parts to be inspected are placed in a water bath or soe other li:uid couplant is called"

a. Contact testin! b. Iersion testin!

c. 'urface wave testin!

d. Throu!htransission testin!

6/.  separate tie base line iposed on the viewin! screen of soe ultrasonic testin! instruents that perits easureent of distances is often referred to as"

a. n initial pulse b.  tieJdistance line

c.  ar$er d.  sweep line

(13)

61.  ter used to describe the ability of an ultrasonic testin! syste to distin!uish between the entry surface response of discontinuities near the entry surface is"

a. 'ensitivity b. =enetration

c. 'e!re!ation d. Resolution

6%. The phenoenon whereby an ultrasonic wave chan!es direction when the wave crosses a boundary between aterials with different velocities is called"

a. Refraction b. Reflection c. =enetration d. Rarefaction

6*. In a test where the transducer is not perpendicular to the inspection surface& the an!le of incidence is e:ual to"

a. The an!le of refraction b. The an!le of reflection c. The shear wave an!le d. #alf the shear wave an!le

60. The product of the acoustic velocity of sound in a aterial and the density of the aterial is the factor that deterines the aount of reflection of ultrasonic ener!y when it reaches an

interface. This ter is called" a. coustic ipedance

b. Felocity c. 9avelen!th d. =enetration

6. In transittin! ener!y into the part shown in 8i!ure 4& the ultrasonic bea will" a. iver!e (spread out) throu!h the part

b. Conver!e (focus in to a point) throu!h the part c. Transit strai!ht throu!h the part

d. >ot enter the part

62. Ultrasonic waves that travel alon! the surface of a aterial and whose particle otion is elliptical are called"

a. 'hear waves b. Transverse waves

c. Lon!itudinal waves d. Raylei!h waves

63. The interference field near the face of a transducer is often referred to as the" a. 8resnel 5one

b. coustic ipedance c. @-ponential field d. =hasin! 5one

(14)

64. 9hen the incident an!le is chosen to be between the first and second critical an!les& the ultrasonic wave ode within the part will be a"

66. The forula used to calculate the an!le of refraction within a aterial is called" a. 8resnelKs law

b. 8raunhoferKs Law c. 'nellKs law

d. LabKs law

1//. In a aterial with a !iven velocity& when fre:uency is increased& the wavelen!th will" a. >ot be affected

b. Increase c. ecrease d. ouble

1/1. 9hich circuits electronically aplify return si!nals fro the receivin! transducer and often odify the si!nals into a for suitable for display;

a. =ulser circuits b. <ar$er circuits

c. Tier circuits

d. Receiveraplifier circuits

1/%. 9hat is the ost coon type of data display used for ultrasonic e-aination of welds; a. n scan display

b.  +scan display c.  Cscan display d. n , plot

1/*. 9hich is a plot of si!nal aplitude versus tie a. n scan display

b.  +scan display c.  Cscan display d. >one of the above

1/0. 9hich circuits odify the return si!nal fro the receivin! transducer into a for suitable for display on an oscilloscope or other output device;

a. =ulser

b. Receiveraplifier c. Cloc$

d. 'weep

1/. 9hich circuit !enerates a burst of alternatin! volta!e that is applied to the sendin! transducer;

a. =ulser

b. Receiveraplifier c. apin!

(15)

1/2. 9hich circuit coordinates electronic operation of the entire ultrasonic instruent syste; a. apin!

b. Receiveraplifier c. Cloc$

d. =ower supply

1/3.  plan view display or recordin! of a part under e-aination is called" a.  Cscan display

b. n scan display c. n ,a-is plot

d.  strip chart recordin!

1/4. Ultrasonic data which is presented in a for representative of the cross section of the test specien is called"

a. n scan presentation b.  +scan presentation

c.  Cscan presentation d. n , plot

1/6. 9hat type of ultrasonic e-aination uses wheeltype search units that eliinate the use ofd a tan$;

a. Throu!htransission testin! b. Contact testin!

c. Resonance testin! d. Iersion testin!

11/. In addition to other functions& a probe anipulator in a echanical iersionscannin! unit perits"

a. Use of the throu!htransission techni:ue b. Use of hi!h scannin! speeds

c. etection of obli:uelyoriented discontinuities d. Utili5ation of less s$illed operators

111.  type of data presentation ost li$ely to be used with a hi!h speed autoatic scannin! syste is"

a. n scan presentation

b.  velocity versus aplitude plot c.  Cscan presentation

d.  plot of echo hei!ht versus depth

11%. The coponent in a conventional iersion syste that spans the width of the iersion tan$ is called"

a. n articulator b.  brid!e

c.  anipulator d.  search tube

(16)

11*. 9hich coponent in an ultrasonic iersion syste is used to adHust and aintain a $nown transducer an!le;

a.  carria!e b.  anipulator

c.  search tube d. n inde- syste

110. n aplitude type !ate is necessary for all" a. 'hear wave e-ainations

b. Lon!itudinal wave e-ainations c. utoatic e-ainations

d. <anual e-ainations

11. 9hen a Cscan recordin! is used to produce a peranent record of an ultrasonic test& the inforation displayed is typically the discontinuities"

a. epth and si5e

b. epth& orientation. nd si5e c. Location and depth

d. Location and si5e (plan view)

112. Rou!h entry surface conditions can result in" a.  loss of echo aplitude fro discontinuities b. n increase in the width of the front surface echo

c. +oth a and b

113. s the !rain si5e increases in a aterial& its principal effect in ultrasonic testin! is on the" a. Felocity of sound

b. ttenuation

c. coustic ipedance d. n!le of refraction

114. In strai!ht bea pulse echo testin!& a discontinuity with a rou!h reflectin! surface

perpendicular to the incident wave will have what effect on the detected si!nal in coparison to a sooth flat botto hole of the sae si5e;

a. Increase it b. ecrease it

c. #ave no effect on it

d. ecrease the width of the pulse of it

116. Ultrasonic vibrations can be propa!ated only in the lon!itudinal ode in which of the followin! edia;

a. <achine oil b. luinu

c. Ice

(17)

1%/. If the velocity of a lon!itudinal ode wave in a !iven hoo!enous aterial is /.2% cns at 1*  (/. in) below the surface& what is the velocity at 1  (% in) below the surface; a. M the velocity at 1*  (/. in)

b. B the velocity at 1*  (/. in)

c. The sae as the velocity at 1*  (/. in) d. >one of the above

1%1. If a  <#5 transducer is substituted for a %.% <#5 transducer& what would be the effect on the wavelen!th of a lon!itudinal ode wave produced in the test specien;

a. The wavelen!th would be lon!er

b. The wavelen!th would reain constant c. The wavelen!th would be shorter

d. The wavelen!th would vary directly with the acoustic ipedance 1%%. 9hat can cause nonrelevant indications on the cathode ray tube; a. Contoured surfaces

b. @d!e effects

c. 'urface conditions d. ll of the above

1%*. The proper interpretation and evaluation of the presented defect si!nals are essential to any nondestructive test.  coon ethod for estiation of defect si5e is the use of a"

a. ouble transducer test b. =ie5oelectric standard

c. <ode conversion d. Reference standard

1%0. nother nae for 8resnel None is" a. 8raunhofer None

b. >ear field c. 8ar field d. Torrid None

1%. ttenuation is a"

a. Test display characteristic b. Test aterial characteristic

c. Transducer characteristic d. 8or of testin!

1%2. 8or discontinuity !eoetrics other than flat& the echo aplitude is usually AAAAAAA fro that observed for a flat defect& of siilar orientation perpendicular to the sound beas"

a. Identical b. Increased

c. ecreased d. @lon!ated

1%3. 9hat ust be done to evaluate discontinuities that are oriented at an an!le to the entry surface so that the sound bea will stri$e the plane of the discontinuity at ri!ht an!les; a. Chan!e the fre:uency

b. rind the surface

c. n!ulate the search unit d. Increase the !ain

(18)

1%4. The pulser circuit in an ultrasonic instruent is used to" a. Control the hori5ontal and vertical sweep

b. ctivate the transducer

c. Control transducer tiin! between transit and sweep d. enerate ar$ers that appear on hori5ontal sweep

1%6. n scan CRT display which shows a si!nal both above and below the sweep line is called"

a.  video display b.  R8 display

c. n audio display

d.  fre:uency odulated display

1*/.  +scan display shows the relative"

a. istance a discontinuity is fro the transducer and its throu!hdiension thic$ness

b. istance a discontinuity is fro the transducer and its len!th in the direction of transducer travel

c. Cross sectional area of a discontinuity above a predeterined aplitude d. >one of the above

1*1. 'urface (Raylei!h) waves travelin! on the top face of a bloc$" a. re not reflected fro a sharp ed!e corner

b. re reflected fro a sharp ed!e corner

c. Travel throu!h the sharp ed!e corner and are reflected fro the lower ed!e d. re absorbed by a sharp ed!e corner

1*%. 'urface (Raylei!h) waves are ore hi!hly attenuated by" a.  curved surface

b.  heavy couplant c.  thin couplant d. +oth a and b

1**. The velocity of sound in a aterial is dependent upon the" a. 8re:uency of the wave

b. 9avelen!th

c. <aterial properties d. Fibration cycle

1*0. To vary or chan!e the wavelen!th of the sound bein! used to test a part& you would chan!e the"

a. 'ound wave fre:uency b. iaeter of the transducer

c. @lectrical pulse volta!e d. =ulse repetition rate

1*. Ultrasonic vibrations are coonly used to" a. @-aine aterials for discontinuities

b. @-aine aterials for thic$ness

c. @-aine aterials for echanical properties d. ll of the above

(19)

1*2. 9hich of the followin! has the lon!est 8resnel 5one; a. 1*  (/. in) diaeter 1 <#5

b. 1*  (/. in) diaeter %.% <#5 c. %4.  (1.1% in) diaeter 1 <#5 d. *4  (1. in) diaeter % <#5

1*3. 9hen contact testin!& if the ultrasonic instruent is set with an e-cessively hi!h pulse repetition rate& which of the followin! ay occur;

a. The screen trace will becoe to li!ht to see b. The tiebase line will becoe distorted

c. The initial pulse will disappear

d. host or DphantoE indications will appear on screen durin! scannin! 1*4. The advanta!es of iersion testin! include which of the followin!; a. Inspection speed increased

b. bility to control and direct sound beas c. daptability for autoated scannin! d. ll of the above

1*6. Lon!itudinal wave velocity in water is appro-iately M the velocity in aluinu or steel. Therefore& the iniu water path should be"

a. 8our ties the test piece thic$ness b. B the test piece thic$ness

c. M the test piece thic$ness plus 2  (/.% in) d. >one of the above

10/. In iersion testin!& a wettin! a!ent is added to the water to" a. dHust the viscosity

b. #elp eliinate the foration of air bubbles c. =revent cloudiness

101. The forula used to deterine the fundaental resonant fre:uency is" a. 8 O F T

b. 8O F  %T c. 8 O T  F d. 8 O FT

10%. If fre:uency is increased& the wavelen!th will" a. ecrease (be shorter)

b. Increase (be lon!er)

c. Reain the sae but velocity will increase d. Reain the sae but velocity will decrease

10*. The variable in distance aplitude calibration bloc$ construction is the" a. rilled hole si5e

b. rilled hole point an!le

c. <etal distance above the drilled hole

(20)

100. 9hen settin! up a distance aplitude correction curve usin! * flat botto holes& soeties the hole closest to the transducer !ives less of a response than one or both of the other two. This could be caused by"

a. Inconsistent surface of the calibration bloc$ b. >ear field effects

c. Incorrect hole !eoetry d. ll of the above

10. <ost ferrous and nonferrous welds ay be ultrasonically tested usin! a fre:uency ran!e of" a. %1// $#5

b. %//// $#5 c. 1%.% <#5 d. 1/%/ <#5

102. The product of the aterial density and the velocity of sound within that aterial is referred to as"

a. coustic ipedance b. >ear field

c. coustic attenuation

d. Ultrasonic bea distribution e. Fibrational

inde-103.  strai!ht bea contact search unit consists of which of the followin! basic coponents; a. Case& crystal& ount& and bac$in!

b. Case& crystal& bac$in!& and plastic wed!e c. Case& crystal& bac$in!& and acoustic lens d. ll of the above

104. In iersion testin!& to reove the second water reflection fro between the entry surface si!nal and the first bac$ reflection& you should"

a. Increase the repetition rate b. ecrease the fre:uency

c. ecrease the sweep len!th d. Increase the water path

106. 8or a !iven incident an!le& as the fre:uency of the transducer increases& the refracted an!le" a. Increases

b. ecrease c. 'tays the sae

d. Cannot be deterined

1/. +oth lon!itudinal and shear waves ay be siultaneously !enerated in a second ediu when the an!le incidence is"

a. +etween noral and the first critical an!le b. +etween the first and second critical an!les

c. =ast the second critical an!le d. ?nly at the second critical an!le

(21)

11. In iersion testin!& when the sound bea stri$es a concave surface& the sound bea tends to

a. Conver!e b. iver!e

c. 'tay the sae d. <ode convert

1%. =enetration of ultrasonic waves in a aterial is norally the function of test fre:uency used. 9hich of the followin! fre:uencies would provide the !reater depth of penetration; a. 1 <#5

b. %.% <#5 c.  <#5 d. 1/ <#5

1*. enerally spea$in!& certain pie5oelectric aterials e-hibit better properties than others. 9hich of the followin! aterials is considered the ost efficient receiver of ultrasonic ener!y; a. Quart5

b. Ceraic

c. +ariu titanate d. Lithiu sulfate

10. Refracted ener!y will assue a new direction of propa!ation when the AAAAAAAAA is chan!ed.

a. =rinciple an!le b. Reflected an!le

c. Critical an!le d. Incident an!le

1. The loss of ener!y ads it propa!ates throu!h aterial is the result of bea" a. Interference

b. ttenuation c. bsorption d. Reflection

12. In selectin! a suitable couplant& which of the followin! characteristics would not affect the selection;

a. <ode of propa!ation desired

b. <aterial surface finish and teperature c. ?peratin! fre:uency of the transducer d. Cheical properties of the couplant

13. 9hich of the followin! could be caused by e-cessive surface rou!hness of the aterial bein! tested;

a.  loss of echo aplitude fro discontinuities within the aterial b. n increase in the width of the initial pulse

c. +oth a and b d. >one of the above

(22)

14. 9hich of the followin! are reasons for usin! reference or calibration standards; a. They provide a easure of the test systes perforance

b. They provide a ethod for standardi5in! the test syste c. They provide a coon basis for e-pressin! test results d. ll of the above

16. The chan!e in direction of an ultrasonic bea when it passes fro one aterial to another aterial in which elasticity and density differ is called"

a. Refraction b. Rarefaction

c. n!ulation d. Reflection

12/. If a discontinuity is oriented at an an!le other than 6/( to the sound bea& the results ay be a"

a. Loss of si!nal linearity

b. Loss or lac$ of si!nal reflected fro the discontinuity c. 8ocusin! of the sound bea

d. Loss of interference phenoenon

121.  device that transfors electrical pulse into echanical and vice versa utili5es" a. 'nellKs law

b. =ie5oelectric principles c. <ode conversion principles d. >one of the above

12%. 9henever an ultrasonic incident an!le is set at ( fro noral" a. The refracted wave ode is converted

b. The refracted wave is the sae ode as the incident wave

c. The refracted wave will have two coponents& one of which will be the sae ode ass the incident wave

d. It is ipossible to deterine ode(s) of refracted wave without ore inforation 12*. If a discontinuity is located in the 8resnel or near field re!ion of a sound bea" a. The lar!er the discontinuity& the lar!er the aplitude of the reflected si!nal

b. The closer tot he surface the discontinuity is located& the lar!er will be the aplitude of reflected si!nal

c. In iersion testin!& the aplitude of si!nal will increase as the water path decreases

d. In iersion testin!& the aplitude of reflected si!nal ay increase or decrease as water path decreases

120.  transducer is vibratin! at a fre:uency and inHectin! ultrasonic ener!y throu!h water into a steel specien"

a. The sound wavelen!th is the sae in both the water and the steel

b. The sound fre:uency in the water is less than the sound fre:uency in steel c. The sound wavelen!th is not the sae in both the water and the steel

(23)

12. 9hen a lon!itudinal sound wave stri$es a watersteel interface at an an!le of a. incidence of 17& (see 8i!ure 6)"

a. ll the sound ener!y is reflected bac$ into the water at an an!le of 17

b. =art of the sound ener!y is reflected at 17 and part is refracted into the steel at an an!le less than 17

c. =art of the sound ener!y is reflected at 17 and part is refracted alon! the watersteel interface d. =art of the sound ener!y is reflected at 17 and part is refracted into the steel at an an!le