API 510 Q

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Questions

1) For a vertical with column internal dia =48 and height (T-T )=80ft, the vessel!"# is $0%si& the vessel %art !"# for 'ottom dished head (1 elli% t*%e )will 'e

a) +4&$ %si ') 8&8 %si c) +& %si d)none of a'ove

) "hat is the geometric unshar%ness allowed as %er code for a thicness of (0&8mm) as %er code.

a) 0&0 ') 0&0/ c) 0&01 d) none of the a'ove

/) ! 1 thic %late was oined with 1-1 %late with a groove weld to mae a toridish to shell oint& The allowa'le reinforcement for the oint shall 'e

a) 2 ') /1$ c) 1$ d) 18

4) ! 3! 1$ grade$0 material can 'e used for %ressure vessel without im%acttesting u% to a tem%erature of deg F

a) $ deg F ') $/ deg F c) ++ deg F d) -4 deg F

) The length of char%* im%act sam%le shall 'e

a) 4 ') c) &1$ d) none of the a'ove

$) ! groove weld made with 1-14thicness %late with 3!" %rocess for #567ualication and the test were found acce%ta'le& This #56 can 'e used u% to ama9imum weld thicness of

a) 1-14 ') & c) 8 d) none of the a'ove

:) ! %ressure vessel was manufactured and read* for h*dro test& The o%erating%ressure is +0 %si& The !"# is 100 %si& the h*dro test %ressure for this vessel is

a) 1/0 %si ') 11: %si c) 10 %si d) 1/ %si

8) The %ressure vessel was constructed with / thicness hemis%herical head and4-1thicness shell& The material of construction is 3!1$ grade :0& The%ermissi'le misalignment for the circumferential seam 'etween head and shell

is

a) /1$ ') /8 c) 1$ d) 18

+) The %ressure vessel long seam (;=1) was tested for radiogra%h* with athicness of %late 1-14 and the oint

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11) ! thicness vessel was having oint e>cienc* of 0&8 a corrosion %atchwas o'served at $ from weld& The oint e>cienc* to 'e considered for decidingthe minimum thicness for this %atch shall 'e

a) 0&8 ') 1 c) 0&:0 d) 0&+0

1) The %late ?5? re7uired for 1 thicness welded %late with 18reinforcement shall 'e

a) /0 ') 1 c) 40 d) 1

1/) ! %ressure vessel thicness is 1-14 and longitudinal seam for shell wasradiogra%hed ( reinforcement = / mm @ ; = 1 )& The ma9imum length of lacof %enetration acce%ta'le is

a) 1mm ') 4mm c) $mm d) AB# is not acce%ta'le

14) ! column was h*dro tested having total height of 4 feet& The to%%ressure gauge is reading 4 %sig& The 'ottom %ressure gauge will reada%%ro9imatel*

a) & %sig ') $:& %sig c) 4 %sig d) none of the a'ove

1) The term Cawa* from the weld for recalculating the re7uired thicness(vessel with ;D1) means area l*ing awa* from weld on either side of theweld or times the minimum measured thicness on either side of the weldwhichever is greater

a) 1, 4 ') 1, c) , d) , 4

1$) !n elli%sodical head has an internal diameter of :$ inches and de%th of1 inches ( including a straight face dimension of inch ) & what should itss%herical (crown) radius 'e.

a) :$&+ inches ') 1&$ inches c) $8&4 inches d) all the a'ove

1:) Ealculate the remaining life and the e9ternal ins%ection interval of avessel the following data actual thicness = 0&+ inch, minimum thicnessre7uired = 0&: inch, thicness at %revious ins%ection *ear %rior to %resentins%ection = 1&0 inch

a) 0*rs @ 10*rs ') 14*rs @ *rs c) 8*rs @ 10 *rs d)none

18) ! vessel was ins%ected si9 *ears ago and had shell thicness =0&8:0& ason toda* the thicness as re%orted '* led ins%ection is 0,:8$& "hat was thecorrosion rate over last si9 *ears

a) 10m%* ') 1 m%* c) 14m%* d) none

1+) ?f the vessel in a'ove 7uestion has minimum %ermissi'le thicness =0&$18 for the %resent design conditions& "hat will 'e estimated remaining lifeof the vessel if the corrosion rate remains same.

a) 10*rs ') 1 *rs c) 14*rs d) none

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0) For a vessel in 518 @ 51+ nd interval for ne9t thicness ins%ection

a) 10 ') $ c) 8 d)

1) For a vessel remaining life is estimated as *rs from now , ne9t %lannede9ternal ins%ection shall not 'e later than

a) 11 ') 10 c) d) none

) Two %late tensile test s%ecimens have 'een tested and found to 'eacce%ta'le& The characteristics of each s%ecimen are as follows s%ecimen 1 width =0&:, t =0&8:,T3=:8,4 %sis%ecimen width =0&:0, t =0&8,T3=::,$4 %si"hat is the ultimate load for each s%ecimen that was re%orted on the la're%ort.

a) 1,$$8 @ 4$,44 ') $:,4/ @ $,44/c) :8,4 @ ::,$4d)none

/) "hat is the ma9imum defect %ermitted on the conve9 surface of a welder7ualication 'end test after 'ending e9ce%t for corner cracs and corrosionresistant weld overla*.

a) 2 ') 18 c) 11$ d) /1$

4) For a corrosion area of considera'le siGe, thicness averaging along mostcritical element shall not e9ceed following length for $0 ?H vessel and : ?Hvessel&

a) 0 @ 40 ') 1$ @ 4c) 0 @ 4 d) none

) For ammeter cali'ration for magnetising e7ui%ment , the allowa'letolerance is

a) I- J ') I- 10J c) I- 1J d) I- 0J

$) "hen dial t*%e indicating and recording %ressure gauges are used tomonitor lea testing, the ma9imum gauge range shall not e9ceed whichmulti%le of the e9%ected test %ressure.

a) 1 K 1times ') - times c) / times d) 4 times

:) Ealculate estimated ins%ection %eriod for e9ternal and internal ins%ectionfor a vessel whose remaining life is estimated as 1 *ears

a) ?nternal $ *rs @ e9ternal 10 *rs ') ?nternal $ *rs @ e9ternal *rs c) *rs @ 10 *rs

8) ! inch th vessel data sheet shows HT = 0 deg F& the minimum%ressure test tem% for h*dro test to 'e carried out after alteration shall 'e

a) :0 deg F ') 80 deg F c) $0 deg F d) none

+) For a vessel which is %lanned for internal ins%ection after 8 *ears what

should 'e the minimum remaining corrosion allowance in the vessel if corrosionrate is 10 microns *ear

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a) &0 mm ') &4 mm c) 1& mm d) none

/0) Ealculate the remaining life of a vessel given the following data actualthicness = 0&+ inch, minimum thicness re7uired = 0&:8: inch, thicness at%revious ins%ection *ear %rior to %resent ins%ection = 1&01 inch

') 0*rs ') 14*rs c) 8*rs d)none

/1) The minimum thicnesses availa'le for a seamless toris%herical head forthe following data are given in o%tions& 3elect suita'le head thicness for a newconstruction of vessel& # = 00 %si, 3 = 1:,00 %si, ?H = +$ inches no E!

a) 1 inch th ') 1& inch th c) 0&: inch th d) 1&1inch th

/) For a given conguration, correct minimum weld dimension (9) re7uiredas %er !3; 3ec L??? div 1 shall 'ea) 10mm ') 1 mm c) 14mm d) none

//) ! vessel with seamless 1 elli%tical head $0 inch ?H, 400 %si design%ressure, E! = 0, 3 = 0000 %sig was ins%ected& !vaila'le thicness of onl*8 was o'served on the crown %ortion& The nucle thicness was found to 'eade7uate& Mour assessment is

a) Nead thicness in crown %ortion is still o for o%eration') thicness is ade7uatec) de%ends on o%inion of third %art* ins%ector d) !#? 10 ins%ector

/4) choose correct h*drostatic test %ressure from given o%tions for a vesselwith following data

design %r = 00 %si, design tem% = $: deg F, BE = 3! /: cl 1, allow stress( am'ient) = 18000%siallow stress ($: deg F)=1000 %si

a) /0 %sig ') $0 %sig c) /1 %sig d) none

/) ! %ressure vessel (BE 1$ Or :0) has e9ternal acet s%read over :inches length of the shell ( acet %ressure =00 %si, acet tem% =/0 deg F)the vessel BH = /$ inches, shell thicness = 0& inch, E! = nil & Hecide which ofthe following are a%%lica'le in the %resent case&

a) 3hell thicness is o') 3hell thicness is not oc) Hata not ade7uate d) acce%tance of shell thicness de%ends vessel

engineer

/$) For a certain noGGle to shell oint ( no E! re7d) following data %resented&3hell thicness %rovided -=0&4 inch, noGGle ?H = /& inch, %ad siGe = $&4 inBH, th of %ad = 0&4

a) PoGGle is ade7uatel* reinforced') 6einforcement is inade7uatec) Hata is inade7uate - noGGle thicness must 'e given

d) Hata is inade7uate - design shell thicness must 'e given

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/:) !n elli%soidal head has an internal diameter of 80 inch and de%th of inches (including a straight face dimension of inch)& "hat should its s%herical(crown) radius 'e.

a) :$&+ inches ') : inches c) $8&4 inches d) all of thea'ove

/8) The crown %ortion for toris%h& Nead (?H 40 inch) ma* 'e considered asthe %ortion l*ing entirel* within a circle whose centre will 'e same as headcentre and diameter will 'e

a) /$ ') 40 c) / d) 00

/+) For 1 elli% head ( ?H = : inches ), the crown %ortion would lie withinsimilar circle of diameter

a) $0 ') /0 c) 4 d) 48

40) The ma9imum %ermitted reinforcement on circumferential welds with%late thicness u% to 1 inch will 'e

a) 18 ') 11$ c) /1$ d) 2

41) For a vertical with column internal dia =48 and height (T-T )=+8 ft,theh*drostatic head for 'ottom dished head (1 elli% t*%e ) will 'e

') 40&$ %si ') 4&4 %si c) 4/&/ %si d)none of a'ove

4) ! %ressure vessel has 'een in service for 1 *ears and has a histor* ofcorrosion over its service life& The original thicness was 1&+/: inches& The

current thicness is 1&40 inches& "hat is the corrosion rate of this vessel.

a) 0&044 in *r ') 0&08+ in*r c) 0&$$ in*r d) 0&/in *r

4/) Lessel $0 ?H, a noGGle o%ening of nished o%ening = 8 inches was%resent in thinned out %atch on inside surface and l*ing close to a reinforcingnoGGle with 6F %ad BH = 8& "hat length will 'e taen for corrosion averagingis taen for corrosion anal*sis

a) 8 inches ') 1$ inches c) 0 inches d) /0 inches

44) "hat will 'e total thinning ( metal loss ) u% to ne9t ins%ection dur after 10more *ears if corrosion rate is $ m%*

a) 0&0inch ') 0&0$ inch c) 0&00$ inchd) 0&$ inch

4) "hat is the gauge reading when %erforming a h*drostatic test on avessel having an !"# of : %si at 800 F& The material stress at 800 F is 1,800%si and the material stress at h*dro test tem% is 1:,00 %si& The gauge islocated at the 'ottom of 0 ft vessel %ositioned verticall* during h*dro testing

a) 1/8 %si ') 1$0 %si c) 10 %si d) 104: %si

4$) ! 1 *ear old vessel was measure to have a general average thicness of0&$4& ! %revious ins%ection reading taen 10 *ears ago was 0,8+ and the

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original data re%ort of the vessel indicated that the thicness was 1&00& Todetermine the remaining life of the vessel which corrosion rate would *ou as theins%ector use.

a) 0&010 ') 0&0180 c) 0&0/$ d) 0,00

4:) ! 1 BH vessel /8 thic is attached to a forged circular

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$) ! 1 dia %i%e, wall is to 'e installed as a noGGle on the shell& "ithcorrosion allowance of 11$& "hat is the minimum thicness Ct allowed to 'eused for calculating the !"# of the %i%e.

a) 0&00 ') 0&/: c) 0&4/: d) 0&4:

:) !n e9isting /0 tall %ressure vessel is stam%ed C6T- and is constructedof seamless 1 elli%tical head s, shell material and head material is 3!-1-$0&!ll oints are t*%e & ?nside diameter of the vessel is $$& The vessel hascorroded in the shell and heads a%%ro9imatel* 18 and the original thicness ofthe 'oth the heads and the shell was 8 according to the manufacturer datare%ort& 3tress is 14,:$0 %si& !"# is /00 %sig R $:0 deg F& the minimumthicness of the shell, considering h*drostatic head is .

a) 0&:88 ') 0&:01 c) 0&$0 d) 0&00

8) The re7uired thicness of the 'ottom head on the a'ove vessel will 'e

a) 0&:88 ') 0&:01 c) 0&$0 d) 0&00

+) ! %ressure vessel has 'een designed for e9ternal %ressure using 3!-1$-$0 material& The total length of su%%ort is 8 ft& The !"# ( e9ternal) stam%edon the vessel is 0 %sigR00 deg F& The BH is 48 can this vessel 'e safet*o%erated with a minimum shell thicness of 0&0. (*ield strength = 8si)a) Mes& Lessel is acce%ta'le') Po& vessel is not acce%ta'lec) Pot enough information given to form an answerd) aterial cannot 'e used for e9ternal %ressure without full 6T&

$0) ! /0 ?H 0&80 thic circular man wa* has 'een welded to an e9isting

%ressure vessel with a full %enetration weld into the shell& The shell is made of3!-1$-:0 material is 0&$ thic and is :?H& The manhole is 3!-10$-Eande9tends %ast the vessel wall& / on the outside of the vessel& The man wa* is

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%sigR00 deg F& The BH is 48& Ean this vessel 'e safel* o%erated if thethicness has corroded down to 0&0

a) Mes& This vessel is safe down to 0&0') Po& this vessel is not safe for 10 %sigc) Pot enough information %rovided to solve the %ro'lemd) Mes& This vessel could actuall* 'e o%erated at 0 %sig

$/) ! vessel shell is $$ ?H and is made from material with a stress value of1$,00 %si& The vessel has categor* ! t*%e 1 'utt welds and is stam%ed 6T-& ?fthe thicness has corroded down to 0&8thic, what !"# can 'e allowed onthis vessel.

a) 400 %sig ') 1+0 %sig c) 0 %sig d) 1/+ %sig

$4) ! cienc* of 1&0 and a Efactor of 0&//& Ean this head 'e o%erated with the corroded thicness of 1, .

a) Mes& Ean continue to o%erate') Po& cannot 'e o%eratedc) E factor is incorrect for designd) Eircular heads cannot 'e use at 1&

$) Bn 1 thic %iece that will 'e T tested '* %rods, the s%acing 'etweenthe %rods will 'e & The correct am%erage range for this s%acing would 'e

a) 1000 K 000 am%s ') 10-/00 am%s c)100-1 am%s d) 00-$ am%s

$$) ! standard seamless toris%herical head has a sirt BH of $and acorroded thicness of 1&:& The material stress value is 1$,100 %si and thehead is attached to the 'ottom of a vertical vessel that is 0 tall full of water& ?fthe vessel is stam%ed 6T-, what a%%ro9imate !"# would 'e allowed on thisvessel.

a) $00 %sig ') 40 %sig c) :04 %sig d) /0 %sig

$:) ! h*drostatic test is conducted on a vessel that is $0 tall& ! %ressuregauge is located / u% from the 'ottom of the vessel& ?f the stress ration is 1&0and the !"# of the vessel is 100 %si, what a%%ro9imate %ressure should the

gauge read to meet !3; L??? re7uirements.

a) 141 %sig ') 14 %sig c) 1/0 %sig d) 18$ %sig

$8) ! %ressure vessel has 'een in service for 1 *ears and has shown ahistor* of corrosion over its service life& The original thicness was 1&+/: thicand the %resent thicness is 1&40& "hat is the corrosion rate for this vessel.

a) 0&$$0 in *r ') 0&/00 in*r c) 0&088:0 in*r d)0&044/: in*r

$+) ! steel 'ar is 1 long 9 / in diameter& "hat are the %ro%eram%ereturns to 'e a%%lied when using the coil techni7ue.

a) 4/: ') 000 c) /000 d) 000

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:0) ! round steel 'ar is 14 long 9 :diameter& "hat is the %ro%er am%erageto 'e a%%lied when using the circular direct contact techni7ue.

a) 4+00-$/00 ') 100-$00 c) turns d) 100-1$00

:1) ! %ressure vessel has 'een in service for 1 *ears and has a histor* ofcorrosion over its service life& The original thicness was 1&+/: inchesS thecurrent thicness is 1&40 inches& "hat is the corrosion rate for this vessel.

a) 0&044 in*r ') 0&08+ in*r c) 0&$$ in*r d)0&/ in*r

:) ! fteen *ear old vessel made of 3!-0/,Or was measured as having athicness of 0&$4&The inside diameter is 4 and the !"# is 40 %si at $0Heg F& The 'acing ring was left in %lace and the vessel did com%l* with "-11(a) () (')& aterial stress is 1:,00 %si& The %revious reading on the materialhad a thicness of 0&$8 during the rst 10 *ear interval& Hata re%ort indicated

that the material had a nominal thicness of 0&:& The corrosion rate is

a) 0&00: ') 0&0: c) 0&0/ d)0&00/

:/) !s %er a'ove 5:, The re7uired minimum thicness is

a) 0&48 ') 0&$4 c) 0&$10 d) 0&:88

:4) !s %er a'ove 5:, The remaining corrosion allowance is

a) 0&0+: ') 0&00/0 c) 0&0/ d) 0&00+:

:) !s %er a'ove 5:, The remaining service life in *ears is

a) ') & c) 1/&8 d) $&+

:$) ! forged c*lindrical vessel having an outside diameter of 1$ wasmeasured to have an actual shell thicness 0f 0&/1& oth ends of the circularforged

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3ervice = water tan Nead and shell material = 3!-1$-:0 !"# =0 %si

Tem% = 400 deg F ?H = 4 t*%e 1 welds stress =1:,00 %i3hell height=4 feet 1 seamless elli%soidal heads"hat is the minimum material thicness *ou can use for the 'ottom shellcourse.

a) 0&8: ') 0&4:+ c) 0&1$ d) 0&1+88

:+) "hat is the minimum material thicness *ou can use for the u%%erhead.

a) 0&00 ') 0&104 c) 0&/141 d) 0&88

80) "hat is the minimum material thicness *ou can use for the lower head.

a) 0&00 ') 0&104 c) 0&/141 d) 0&88

81) ! 0 %si vessel 100ft tall is to 'e %neumatic tested in accordance withthe original !3; 3ec L??? div 1 rules& The material is 3!-1$-:0 and has adesign stress of 1000 %si and a stress of 1:00 %si at am'ient testtem%erature&

"hat is the %neumatic test %ressure re7uired.

a) 4 %si ') 4$ %si c) /: %si d) /1/ %si

8) "hat is the minimum tem%erature at which a fa'ricated vessel can 'etested.

a) 10 degrees a'ove o%eration tem%') 10 degrees a'ove HTc) /0 degrees a'ove HT d) /0 degrees a'ove Gero

8/) "hat is the rst test %ressure reading of the vessel gauge when%neumaticall* tested.

a) /1/ %si ') : %si c) 18: %si d) :/ %si

84) "hat is the %ressure reading on the gauge after the TN?6H ste% in testing

the vessel.

a) /44 %si ') 41 %si c) %si d) /18 %si

8) ! %ressure vessel is scheduled for %neumatic testing using themethodolog* of !3; code, 3ection L??? Hiv 1&with the !"# = $/ %sig at /:deg F& The vessel is constructed of 3!-1$-$ material and is neither ena'led forlined& The test metal tem%erature will 'e a minimum of 0 Heg F, %er the owners%ecications& Now man* %ressuriGation ste%s are needed to achieve theminimum re7uired test %ressure, and at what minimum %ressure will the visuale9amination 'e %erformed.a) $ ste%s $/ %sig

') $ ste%s :+/&: %sigc) + ste%s $/ %sig d) + ste%s :+/&: %sig

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8$) ! vertical vessel has 'een determined to need de-rating to a lower !"#&The new !"# is 'ased on the engineerUs calculation for %ressure allowed onthe to% shell section listed 'elow& The vessel has an elevation of feet to itsver* to%& The following %ressure is calculated to the 'ottom of the elementlisted& To% shell section, elevation 40&/ feet, #=48&/ %si& "hat is the !"# ofthis vessel 'ased on this calculation.a) 4/+&$ %si') 440&8 %sic) 41&+ %sid) 4:&$ %si

8:) ! shell course is 'eing re%laced in an e9isting vessel made of 3!-1 Or rolled %late& The shell course will have a thicness of 1& inches and insideradius of 40 inches& The data re%ort on the vessel indicates the original designcalled for a oint ; of 1&0, a !"# of $: %sig at 40 degree F(/ deg E) andthat the HT re7uired is deg F(-1 deg E)& %reheat to 00 degrees F (/deg E) was used all during welding& #"NT was %erformed also& The ratio ofdesign stress to allowa'le stress is 0&+0& "hat reduction in HT can 'e taenfor the ratio of design stress of 0&+0.

a) 0 deg F (-: deg E)') 10 deg F (-1 deg E)c) 1 deg F ( -+ deg E)d) /0 deg F ( -1 deg E)

88) ! h*drostatic test is 'eing %erformed on a vertical vessel with anelevation of 48 feet& The !"# of the vessel in its normal o%erating %osition is %si& !ll 6Ls has 'een removed and the vessel is 'linded oV from all othercom%onents& The gauge will 'e installed at an elevation of & feet& "hat shallthis gauge %ressure 'e during the h*drostatic test at the &U elevation. Thematerial design stress allowed is 1$,800 %si and the stress allowed at testtem%erature of :0 degree F (1 deg E) is 1:,00 %si& N&N is 4// %si %er verticalfoot&

a) /$&$ %si') /1&0 %sic) //+&+ %sid) /1&: %si

8+) Huring the internal ins%ection of a vertical vessel a minimum thicnessreading of 1&:0 was found on a shell course& The data re%ort re

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c) 10 *earsd) &8 *ears

+1) Two noGGles are to 'e added to an e9isting %ressure vessel& Bne noGGle is/& in BH and the other is in BH& Now close ma* these noGGles 'e %laced inthe vessel wall without their areas of reinforcement overla%%ing.a) & inches') / inchesc) & inchesd) inches

+) ! %ressure vessel has 'een measured to have a minimum wall thicnessof 0&/ inch after *ears of service& The vesselUs original wall thicness was0&0& ?ts minimum allowa'le wall thicness is 0&1+ inch& Now long until thene9t re7uired ins%ection as %er !#? 10.a) 1/&/ *ears') 10 *earsc) *earsd) $ and / *ears

+/) ! vessel is undergoing a h*drostatic test after re%air& The vessel is

mared with an !"# of 100 %sig at :0 degree F ( /++ deg E)& the materialsallowa'le stress at o%erating tem%erature is 1,000 %si and its allowa'le stressat test tem%erature is 1:,00 %si& the visual ins%ection shall tae %lace ata) 100 %si') Po less than the !"# of the vesselc) 11$&$$ %sid) 10$&$$ %si

+4) Huring an internal ins%ection a vesselUs shell was measured and found tohave a remaining wall thicness of 0&48$ inches& ?t was last ins%ected 4 *earsago& The retirement thicness of the vessel shell is 0&4: inches and its %reviousthicness was 0&00 inches& ased on this data, %er !#? 10 what is the %resentcorrosion allowance of the vessel.

a) 0&0') 0&110c) 0&011d) 0&014

+) ! vessel is constructed of rolled and welded 3!-1$ gr :0 steel %late& ?t is+$ inches in diameter with a communicating cham'er, which e9tends 18 inches'elow this horiGontal vessel& This vessel is in water service and o%erates atworing %ressure of 10 %si& "hat will 'e the gauge %ressure at woring%ressure as read on a gauge mounted on the 'ottom of the vesselUscommunicating cham'er.a) 10 %si

') 14&11 %sic) 1/&4$ %sid) 1++&/$ %si

+$) ! toris%herical head was found to have minimum thicness of 0&/ inch&This head is attached '* a t*%e weld to a seamless shell& The categor* welds meets the re7uirements of " 11 (a) () (') and " & This headmaterial has an allowa'le stress at o%erating tem%erature 0f 14,800 %si& Thishead has an BH of /$ inch and an inside crown radius of /$& "hat is thewelded ointUs e>cienc* that attaches the head to shell.a) 1&0') 0&8c) 0&80

d) 0&+0+:) ! circular

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vesselUs data is as follows !"# is 00 %si E = 0&// 3=1:,00 %si ;=1&0& "hatis re7uired thicness of this %art.a) 1&/+40 inch') 1&4$/ inchc) 0&+8$// inchd) 1&:00 inch

+8) ! vessel was %laced in service on 11$0 with an original wall thicnessof 0&8:& ?t lost wall at an average rate of 0&00 %er *ear until 11:&3ervice conditions have changed and this ins%ection, 11+$ the vessel has a%resent wall thicness of 0&$/0& The %revious thicness *ear ago was 0&:8+&?f the %resent rate of corrosion continues and the retirement thicness is 0&,what will 'e the retirement *ear of the vessel.a) First 7uarter of 1++:') 3econd 7uarter of 1+++c) 3econd 7uarter of 001d) last 7uarter of 1+++

++) ! vessel is to 'e %neumaticall* tested to a %ressure of 1:&: %si and this%ressure has 'een adusted for a stress ratio of 1&1$$$& the %ressure which the

vessel should 'e ins%ected at will 'eSa) 104&$ %si') 1&$ %sic) 1:&0 %sid) +:&1 %si

100) ! circular

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d) 8/&4 %si104) "hile ins%ecting a toris%herical head it was discovered to have some

severe corrosion and must 'e evaluated for continued service& This corrosionoccurs at a radius //&$ from the e9act centre of the head& The shell diameterof the vessel the head is attached to is :U-0& To evaluate this head forcontinued service what is the greatest distance from the centre that thecorrosion can 'e and still 'e allowed to use the formula for s%herical shellsgiven in section L??? Hiv&1 of the !3; code.a) $:&') 48&0c) //&$d) 84&0

10) The minimum throat dimension for a llet weld as shown g "-1$(c) fora 1 thic noGGle oined to a thic head isa) 0&/0') 0&:0c) 0&0d) 1&00

10$) The inside surfaces of a vesselUs shell have corroded down to a minimumthicness of 0&/$+& The original thicness was 0&00& The vesselUs new andcold inside diameter was +$ inches& "hat will 'e the internal dimension used tocalculate the vesselUs !"#.a) +$&$') 48&0c) +$&0d) 48&1/1

10:) "hat is the remaining life of a vessel corroding at a rate of 0&01: inch %er*ear when the last ins%ection measured 0&$/8 inch and the minimum re7uiredthicness is 0&1/ inch&a) 4 *ears

') 10 *earsc) $&/ *earsd) :&/ *ears

108) For a vessel nd estimated remaining life and ne9t %lanned e9ternalins%ection if actual thicness measured during ins%ection is 0&4 and minimumre7uired thicness is 0&/:& ;stimated corrosion rate is 10 m%*&a) 10 *ears, *ears') 8 *ears, *earsc) 8 *ears, 4 *earsd) 10 *ears, 10 *ears

10+) ?n a'ove 7uestion, if estimated corrosion rate is 0 m%*& The ne9t

%lanned ins%ection and e9ternal ins%ection shall not 'e later thana) 8 *ears, 4 *ears') 4 *ears, 4 *earsc) *ears, *earsd) 8 *ears, *ears

110) For a vessel remaining life is estimated as 4 *ears from now, ne9t%lanned internal and e9ternal ins%ection shall not 'e later thana) 1 *ears, *ears') 10 *ears, 10 *earsc) 10 *ears, *earsd) Pone of the a'ove

111) For a vessel remaining life is estimated as / *ears from now, ne9t

%lanned internal and e9ternal ins%ection ma* 'e %lanned *ears fromnowa) 1& *ears, / *ears

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') *ears, *earsc) 1& *ears, 1& *earsd) and / a'ove

11) For a vessel remaining life is estimated as *ears from now, ne9t%lanned internal and e9ternal ins%ection shall not 'e later thana) 1 *ears,1 *ears') *ears, *earsc) 1 *ears, *earsd) an* of the a'ove

11/) for a non-continuous corrosive service with remaining life *ears,e9ternal ins%ection shall 'e %erformed not later thana) 10 *ears') 1, *earsc) *earsd) Pone of a'ove

114) ! vessel which was ins%ected si9 *ears ago and had shell thicness =0&8:0& !s on toda* the thicness as re%orted '* led ins%ection is 0&:8$&"hat was the corrosion rate over last si9 *ears.

a) 10 m%*') 1 m%*c) 14 m%*d) Pone of the a'ove

11) ?f the vessel in a'ove 7uestion has minimum %ermissi'le thicness =0&$18 for the %resent design condition& "hat will 'e estimated remaining life ofthe vessel if corrosion rate remains same.a) 10 m%*') 1 m%*c) 14 m%*d) Pone of the a'ove

11$) For a vessel remaining life is estimated as *ears from now, ne9t

%lanned internal and e9ternal ins%ection shall not 'e later thana) 11 *ears, *ears') 10 *ears, *earsc) *ears, *earsd) Pone of the a'ove

11:) For a vertical column, int dia =48 and height (T-T) = 80 ft, the vessel!"# is $0 %si& the vessel %art !"# for 'ottom dished head (1 elli% t*%e)will 'ea) +4&$ %si') 8&8 %sic) +& %si

d) Pone of the a'ove118) "hat will 'e the siGe of noGGle to shell weld for noGGle weld conguration.Eonforming to g K X of " 1$& ( nom& 3hell thicness = 8 mm, weld siGe t=1mm)a) 8 mm') 10 mmc) 1 mmd) 14 mm

11+) For a vessel which is %lanned for internal ins%ection after 8 *ears& "hatshould 'e the minimum remaining allowance in the vessel if corrosion rate is10 m%*a) &0 mm

') &4 mmc) 1& mmd) Pone of the a'ove

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10) Ehoose the correct h*drostatic %ressure from given o%tions for thefollowing data-Hesign %ressure K 00 %si, design tem% K $: Heg F BE K 3! /: cl& 1!llow stress (am'ient) K 18000 %si, allow stress K ($: deg F) K 1,000 %sia) /0 %sig') $0 %sigc) /1 %sigd) Pone of the a'ove

11) For a vertical with column internal dia = 48 and height (tan-tan)= +8 ft&the h*drostatic head for 'ottom dished head (1 elli% t*%e) will 'ea) 40&$ %si') 4&4 %sic) 4/&/ %sid) Pone of the a'ove

1) 3hell dia = 0 the %itch for the a'ove reading is 4 9 4& The re7uiredthicness for the shell is (circumferential stress governed)& "hat is theminimum thicness to 'e considered after averaging for calculation of !"#.a) 1&/

') 1&/+c) 1&/1$d) 1&4$

1/) ! %ressure vessel was constructed with / thicness hemis%herical headand 4-1 thicness shell& The material of construction is 3! 1$ gr :0& The%ermissi'le misalignment for the circumferential seam 'etween head and shellisa) /1$') /8c) 1$d) 18

14) ! 0 %si ( design %ressure) vessel is to 'e %neumatic tested in acc with

original !3; section L??? div 1 rules& The material is 3!-1$-:0 and has adesign stress of 1000 %si and stress of 1:00 %si at am'ient test %ressure&"hat is the %neumatic test %ressure re7uired.a) 4 %si') 401 %sic) /: %sid) /1/ %si

1) Following four new seamless standard toris%herical heads are availa'lefor use under following design conditions& Ehoose the correct one&Hesign %r = / %si, Nead ?&H = : and 3 = 0000 %si with no E&!a) Hesign th = 0&+88& %rovided th after forming = 1&0

') Hesign th = 0&488$& %rovided th after forming = 0&c) Hesign th = 0&$184& %rovided th after forming = 0&$d) Hesign th = 0&:4+$& %rovided th after forming = 0&:

1$) Following four new seamless (1) elli%soidal heads are availa'le for useunder following design conditions& Ehoose the correct one&Hesign %r = // %si, Nead ?&H = $0 and 3 = 0000 %si with no E&!a) Hesign th = 0&:/8& %rovided th after forming = 0&:') Hesign th = 0&+:88& %rovided th after forming = 1&0c) Hesign th = 0&4+8& %rovided th after forming = 0&d) Hesign th = 0&:/::& %rovided th after forming = 0&:

1:) Nead in 514 ( toris%h head K !) is to 'e anal*sed according to !#? 10,after %lacing the vessel in service for 10 *ears& For the %ur%ose of !#? 10

anal*sis, value of crown whose radius can 'e taen asa) :') $0

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c) 48d) 4

18) Nead in 51 ( elli% head K ) value of crown whose radius can 'e taenasa) :') $0c) 48d) 4

1+) The crown %ortion for head ! ma* 'e considered as the %ortion l*ingentirel* within a circle whose centre will 'e same as head centre and diameterwill 'ea) $8&') /$&4c) :&$d) 4&0

1/0) For head , the crown %ortion would lie within similar circle of diametera) $0') /0

c) 4d) 481/1) 6e7uired minimum thicness of crown %ortion for anal*sis as %er !#? 10

for head ! (514) shall 'ea) 0&/$+') 0&40:c) 0&4/d) 0&48

1/) 6e7uired minimum thicness of crown %ortion for anal*sis as %er !#? 10for head (51)shall 'ea) 0&44+0') 0&4$

c) 0&/$d) 0&48$/

1//) The minimum nominal thicness of new c*lindrical shell with design %r = %si, inside diameter = 8, 3 = 0000 %si and ; = 0&8 with corrosionallowance of 18 ( E&! for e9%ected life of 0 *ears ) will 'ea) 1&0 inch') 0&: inchc) 1&1 inchd) 1& inch

1/4) !fter 10 *ears of service, e9tensive corrosion was o'served on the shellover a %atch l*ing entirel* 'e*ond $ inches from weld for the vessel in 51/

a'ove& Thinning as measured on this area was /1$, while on weld areaS thecorrosion was within e9%ected limits& !s on toda*, is the vessel isa) 3afe for design conditions') unsafe for design conditionsc) safe onl* if welds are full* radiogra%hed and od) safe onl* if welds are T checed and o

1/) according to !#?10, for vessels with ?&H = 48 corrosion averaging alongmost critical element can 'e done over a length not e9ceedinga) 1 inches') 1$ inchesc) 0 inchesd) 4 inches

1/$) ?f diameter of vessel in a'ove 51/4 is changed to :, the length ofcorrosion averaging will 'ea) /$ inches

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') 4 inchesc) 40 inchesd) 18 inches

1/:) ! cluster of scattered of %its was o'served on e9terior of vessel shell& Thedescri%tion of %its is as follows nominal vessel thicness = 8, E! = 18,total area of %its = &8 s7&inch,#it of largest de%th 0& inch dia, 0&0 dee%!ll %its could 'e enclosed in a circle of 8 inch dia and ma9imum cumulativelength is 1&: inch within circle&a) #its ma* 'e ignored as %er !#?10') #its are unsafe as the total area of the %its is 'e*ond limitsc) The cluster is unsafe as de%th of dee%est %it is 'e*ond limitsd) The cluster is unsafe, the* are e9ceeding cumulative length criteria

1/8) ?f in a'ove 51/$, de%th of dee%est %it was 0&1, cumulative length was&/ inch ( other data remaining same ) *our anal*sis will 'ea) The cluster is still safe') Eluster is unsafe as de%th is still 'e*ond limitc) nsafe as cumulative length is 'e*ond limit

d) and /1/+) ?f total area of cluster is 8 s7&in other data remain same as 51/$, what is*our evaluation.a) Eluster is unsafe due to increased cluster area') Eluster is unsafe due to %it de%th still 'eing unsafec) Eluster is unsafe due to 1 and d) Eluster is safe

140) The standard seamless , !3; F @H head (toris%herical) is used for thefollowing conditionsaterial of construction = 3!1 gr $0Hesign %ressure =0 %sigHesign tem% =80 deg F

?nside crown radius =: inchesinimum availa'le th =1&14 inchesEategor* welds are s%ot radiogra%hed& Eorrosion allowance = 0&1 inches!llowa'le stress at design tem% = 1$400 %sig

Mour assessment isa) The head does not meet code re7uirements') The head meets the code re7uirementsc) 3uita'ilit* would de%end on decision of %ressure vessel ins%ectord) Hata are not ade7uate

141) For a certain %ressure vessel with s%ot radiogra%h*, and all welds t*%e 1, B6( Pame %late of a certain %ressure vessel has name %late stam%ing as C 6T / C

for the radiogra%h*, all "eds are t*%e 1 welds& )

Lessel diameter = : inch ?HBE =3! 1 gr :0Hesign tem% = $00 deg F!llowa'le stress at design tem% = 0000 %si?f shell th = 8 and E! = 18, the !"# for the shell will 'e

a) /4 %si') 1$8 %sic) $ %sid) Pone of the a'ove

14) ! %ressure vessel (BE 1$ gr :0) has e9ternal acet s%read over :

inches length of the shell& ( acet %ressure = 180 %si, acet tem%erature = /0deg F) the vessel BH = /$ inches, shell thicness=0& inch, E!=nil& Hecidewhich of the following are a%%lica'le in the %resent case

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a) 3hell thicness is o') 3hell thicness is not oc) Hata are not ade7uated) !cce%tance of shell thicness de%ends on o%inion of vessel engineer

14/) Ehoose correct h*drostatic %ressure from given o%tion for a vessel withthe following data

Hesign %ressure = /$0 %siHesign tem% = $: deg FBE = 3! /: cl&1!llow stress (am'ient) = 18$00 %si!llow stress ($: deg F) =1$+00 %si

a) 40 %sig') 1 %sigc) 40 %sigd) Pone of a'ove

144) ! %ressure vessel of overall height 80U has its %art !"# at various %artsas detailed in the setch& "hat is the vessel !"# ( h*drostatic head 1U =0&4// %si).

a) 41+ %si') 40 %sic) 4/0 %sid) 4$ %si

14) Ehoose correct %neumatic test %ressure for a vessel with the followingdata

Hesign %ressure = 1$0 %siHesign tem% = $: deg F!llow stress (am'ient) = 0000 %si!llow stress ($: deg F) =1+00 %si

a) 1:$&0 %sig') 1&$ %sig

c) 18/&/ %sigd) Pone of a'ove

14$) Lessel !"# is 00 %si & what will 'e the total %ressure at a %oint 0 feetfrom to% , if vessel is com%letel* lled with li7uid ( s%ecic gravit* = 1)a) 0&00 %si') 08&$$ %sic) 04&// %sid) 1+1&/4 %si

14:) The %ressure vessel has design %ressure = /00 %si& ?tUs safe stress valuesat am'ient and design tem%eratures are 1:100 %si and 1$/00 %si res%ectivel*&

The h*drostatic test %ressure and ins%ection %ressure for a'ove will 'e

a) 40 %si and /4$ %si') 40+ %si and /1 %sic) 41 %si and /00 %sid) Pone of the a'ove

148) ! %ressure vessel has 'een designed using 3!1$-$0 material (/,000*ield)& Total length of su%%ort is 8 feet& The stam%ed !"# (e9ternal) is 10%sig R 00 deg F& the B&H& is 48& Ean this vessel 'e safel* o%erated if thethicness has corroded down to &0.a) Mes& This vessel is safe down to 0&0') Po& this vessel is not safe for 10 %sig&c) Pot enough information %rovided to solve this %ro'lem&d) Mes this vessel could actuall* 'e o%erated at 0 %sig&

14+) !n e9isting vessel is ins%ected on a given *ear and found to 'e 0&00thic in the shell and heads& The ne9t ins%ection is %erformed / *ears later, andthe thicness of the shell and heads is shown to 'e 0&/10 (uniform)& The vessel

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minimum thicness is calculated to 'e 0&00Y& from this information, theremaining life (6A) and internal ins%ection interval (?&?)on this vessel isa%%ro9imatel*a) *ears 6A, 10 *ears ?&?') : *ears 6A, 1 *ears ?&?c) 1&:/ *ears 6A, 1&:/ *ears ?&?d) 10 *ears 6A, 10 *ears ?&?

10) ! vessel shell is $ ?&H and is made from material with a stress value of1$00 %si& The vessel has categor* ! t*%e 1 'utt welds and is stam%ed C6T-&?f the thicness has corroded down to 0&8 thic& "hat !"# can 'e allowedon this vessel.a) 400 %sig') 1+0 %sigc) 0 %sigd) 1/+ %sig

11) ! cienc* of 1&0 and a Efactor od 0&//& Ean this head 'e o%erated with a corroded thicness of 1&.

a) Mes& Ean continue to o%erate') Po cannot 'e o%eratedc) E factor is incorrect for designd) Eircular heads cannot 'e use at 1&

1) ! standard seamless toris%herical head has a sirt B&H& of $ and acorroded thicness of 1&:& The material stress value is 1$100 %si, and thehead is attached to the 'ottom of a vertical vessel that is 0U tall full of water& ?fthe vessel is stam%ed C6T-& "hat a%%ro9imate !"# would 'e allowed on thisvessel.a) $00 %sig') 40 %sigc) :04 %sig

d) /0 %sig1/) ! vessel is ultrasonicall* ins%ected when it is new and cold in Xune 1+8:

and found to 'e 0&800 thic in the shell& The ne9t ins%ection is done in Xune1++ and the vessel found to 'e 0&$0 thic& ?f the minimum thicness '*calculation is 0&10, when (a%%ro9imatel*) should the ne9t internal or onstream ins%ection 'e scheduled %er !#? 10.a) Fe' 1+++') Pov 010c) Xun 00d) Bct 00

14) ! h*drostatic test is conducted on a vessel that is $0U tall& ! %ressure

gauge is located /U u% from the 'ottom of the vessel& ?f the stress ration is 1&0and the !"# of the vessel is 100 %si, what a%%ro9imate %ressure should thegauge read to meet !3; L??? re7uirements.a) 141 %sig') 14 %sigc) 1/0 %sigd) 18$ %sig

1) ! fteen *ear old vessel made of 3!-0/& Or& was measured as having athicness of 0&$4& The inside diameter is 4 and the !"# is 40 %si at $0deg F& the vessel did com%l* with "-11(a) () (')& aterial stress is 1:00 %si&

The %revious reading on the material had a thicness of 0&$8 during the rst 10*ear interval& Hata re%ort indicated that the material had a nominal thicness of

0&:& (Tae ;=1)&The corrosion rate is (in)a) 0&00:

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') 0&0:c) 0&0/d) 0&00/

1$) For 514, The re7uired minimum thicness is (in)a) 0&48') 0&$4c) 0&$10d) 0&:88

1:) For 514, The remaining corrosion allowance is (in)a) 0&+:') 0&00/0c) 0&0/d) 0&00+:

18) For 514, The remaining service life in *ears isa) ') &c) 1/&8d) $&+

1+) $ noGGle, vessel thicness = 0&00, re7uired t = 0&41$& PoGGle thicness= 0&/, diameter H = &:1& Ealculate the reinforcement area.1$0) !n elli%soidal head has an internal diameter of :$ inches and de%th of 1

inches (including a straight face dimension of inches)& "hat should itss%herical (crown) radius 'e.a) :$&+ inches') 1&$ inchesc) $8&4 inchesd) !ll of the a'ove

1$1) Ealculate the remaining life and e9ternal ins%ection of a vessel given thefollowing date actual thicness K 0,+ inch, minimum thicness re7uired K0&:+ inch, thicness at %revious ins%ection *ears %rior to %resent ins%ection K

1&0 inch&a) 0 *ears, 10 *ears') 14 *ears, *earsc) 8 *ears, 10 *earsd) Pone of the a'ove

1$) ! vessel with $0 inches ?H is to 'e %rovided std& toris%herical heads& Theheads shall 'e formed with crown radius and min& nucle radius as follows( head thicness = 1& inch)a) $0 inch, 4 inch') $0 inch, /&$ inchc) inch, / inch

d) Pone of the a'ove1$/) ! %ressure vessel with nominal diameter 100 mm was ins%ected forovalit* of shell& !n o%ening of 00 mm ?H e9ists& The %ermissi'le ovalit* at thevessel cross section which is 10 mm from centre of the o%ening is a) 1 mm') 1$ mmc) 14 mmd) 18 mm

1$4) ! %ressure vessel has design %ressure = /00 %si& ?tUs safe stress values atam'ient and design tem%eratures are 1+800 %si and 18000 %si res%ectivel*& Theminimum h*drostatic test %ressure and ins%ection %ressure res%ectivel* fora'ove will 'e

a) 40 %si, /+0 %si') /+0 %si, //0 %sic) 4+ %si, //0 %si

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tem%erature is 1000 %si& The heads inside diameter is 10U-0& "hat is there7uired thicness of the to 1 elli%soidal head.a) 0&0 ') 0&/ c) 0&00 d) 0&100/

1:4) Mou have received the following tension test results for a welding%rocedure& "hat is the ultimate unit stress for these two s%ecimens.3%ecimen width thicness area ultimate total load l' ultimate unitstress1 0&:0 0&410 0&/08 $00 . 0&:48 0&40+ 0&/0$ 800 .a) :/80 @ 8//14 ') :/:: @ 8/+$ c) ://:: @ 84/14 d) :4/:: @ 8//14

1:) ! to 1 elli%soidal head has e9%erienced corrosion in the central %ortionof the head and will re7uire calculations for continued service& sing thefollowing information, what is to 'e used as the diameter of the s%hericalsegment when evaluating the corrosion. The vesselZs shell diameter is +$inches&a) +$ inches ') :$&8 inches c) 80 inches d) /8&4 inches

1:$) !n elli%soidal head has e9%erienced corrosion at a radius /1 inches a'ovethe centre of the head& The head is attached to a shell that is 8 in diameter

using a t*%e weld that has 'een full* radiogra%hed& This corroded area ma*'e considered within the s%herical %ortion 'ecause the greatest distanceallowed for this calculation from the heads centre isa) :$&8 inches ') /8&4 inches c) 80&0 inches d)

40&0 inches1::) ! vessel shell has scattered corrosive %its caused '* h*drochloric acid&

The greatest %it de%th found e9cluding corrosion allowance in 0&/// inch dee%in the shell& "hich has minimum re7uired thicness of 0&1 inch. The sum of%itUs areas within an 8 inch diameter circle does not e9ceed : s7&inches& this %itmust 'e re%aired 'ecause the limit of the %it de%th in this situation isa) 0&1/0 ') 0&$0 c) 0&/000 d) 0&/0

1:8) "hile ins%ecting a vessel *ou noticed that there is corrosion that is

general& ut varies over an area of the aVected shell coarse& The vessel has aninside diameter of 88 inches& Mou wish to average this corrosion for %ur%oses ofevaluation& Eircumferential stress governs in this vessel in inches what is thegreatest length that can 'e used to average this corrosion.a) 40 inches ') /+ inches c) +&// inches d) 88 inches

1:+) "hat is the re7uired thicness of a $0 inch ?H c*lindrical shell if it has anallowa'le stress at design of 1:00 %si& The vessel categor* ! and H t*%e 1

oints are full* radiogra%hed& !ll categor* oints are t*%e 1 also and have 'eens%ot radiogra%hed %er "-11(a) () (')& The vessel !"# must 'e /0 %si at40 deg F& the shell will see 11 %si of static head at its 'ottom&a) 0&$0: ') 0&:/88 c) 0&:1+ d) 0&$$$

180) ! hemis%herical head formed from solid %late is 48&0 inches in insidediameter this head is attached to a seamless shell and has not had radiogra%h*on the categor* ! t*%e 1 weld that attaches the head to the shell& The vessel ishoriGontal and o%erates at 00 %si water %ressure with an allowa'le stress onthe headUs material of 1000 %si& The headUs thicness re7uired is.a) 0&:41 ') 0&:: c) 1&14/ d) 0&/$

181) ! /-1 inch thic %late weld %rocedure test cou%on must 'e tensiletested& This will re7uire the cutting of the test cou%on into smaller %ieces& Thetensile testing machine is ca%a'le of %ulling u% to 1 thic s%ecimens& Nowman* %ieces will 'e re7uired to for a com%lete test %er section ?[.a) $ ') 8 c) d) 1

18) ! round weld tensile s%ecimen is tested and found to fail in the 'ase

metal at a load of 14&8:$ l'& the s%ecimen was measured 'efore the test tohave a diameter of 0&0/ inches& The ultimate tensile strength of this s%ecimenis ( hint the area of circle is e7ual to /&141 (%i) times its radius s7uared)

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a) :4&8:8 %si ') 18&8+ %si c) /&18 %si d):4&/80 %si

18/) ! vessel has undergone welded re%airs and will re7uire a h*drostatic test&This vessel is horiGontal and has an ?H of $ feet& The vessel o%erates at 10 %siand the data re%ort re

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on se% 1stof 1+8: and was 0&/$4& the last thicness measured was 0&/4 inse% 1stof 1++& ased on the most aggressive corrosion what is the value inmils %er *ear to 'e used in calculating the remaining life of the vessel.a) /&8 mils *r ') &1 mils*r c) 4&:: mils*r d)

/&/ mils*r1+0) ! vessel was 'uilt to the 1+80 edition of section L??? Hiv 1 and %ut into

service that *ear& 3hell material is 3!1$-:0 with an internal diameter of 10inches& !ll welded seams were radiogra%hed& The design %ressure is 140 %sigand design tem%erature is $0 deg F& origin nal shell thicness is 8 in with 18in corrosion allowance& !n ins%ection in dec 1+++ showed a wall thicness was0&$10 in& in dec 00, the ins%ected wall thicness was 0&8 in& what is thelong term corrosion rate.a) 0&0018 in*r ') 0&018 in *r c) 0&01 in *r d)

0&001 in *r1+1) ! vessel was designed to the 001 edition of the !3; section L??? div 1

code& The ?H of the head is 48 inches& The design %ressure is 00 %sig and thedesign tem%erature is /00 F& the vessel seams have 'een radiogra%hicall*ins%ected %er "-1& The vessel material is 3!-1$-:0& The corrosion allowance

is 0&1 inch& The minimum re7uired thicness of the 1 elli%tical head %er thecode of construction isa) 0&+40 inch ') 0&:/0 inch c) 0&$10 inch d) 0&80

inch1+) ! vessel was 'uilt to the 1+80 edition of section L??? division 1 and %ut

into service in 1+80& 3hell material is 3!1$-:0 with an internal diameter of 10inches& !ll welded seams were full* radiogra%hed& The design %ressure is 140%sig and design tem%erature is $0 deg F& original shell thicness is 8 in with18 in corrosion allowance& ?n Hecem'er 00, the ins%ected wall thicness was0&8 in& what is the ma9imum allowa'le woring %ressure to which the vesselcan 'e re-rated %er gure :&1 of !#? 10.a) 1+/ %sig ') 1$ %sig c) 0: %sig d) 1:1 %sig

1+/) ! s%here constructed of 3!-1$-:0 has an ?H of 80 feet& The ointe>cienc* of the welded oints is 0&8& the o%erating tem%erature will not e9ceed00 deg F& if the minimum wall thicness is & inches& "hat is the ma9imumallowa'le woring %ressure of the s%here if it was designed to the 1++8 editionof the !3; #L code section L??? division 1, 000 addenda.a) 1 %sig ') 08 %sig c) 88 %sig d) 1:: %sig

1+4) ! vessel %ut into service in decem'er 1+80& The vessel had the originalshell thicness of 0&$ inches& !n ins%ection in Hecem'er 1++0 measured awall thicness of 0&$10 inches& ?n Hecem'er 00, the ins%ected wall thicnesswas 0&8 in& what is the long term corrosion rate.a) 0&001 in *r ') 0&018 in *r c) 0&0018 in *r d) 0&01

in *r1+) For the given conguration total area to 'e com%ensated will 'e&data with usual notation& H=100mm, t=1mm, tn=$mm, tr=10&mm,trn=mma) +0 mm s7 ') 8:0 mm s7 c) 100 mm s7 d)

100 mm s71+$)