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cwi exam prep
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Graduate
04/18/2014

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Term
wELDINGINSPECTIONPERSONNEL SHALL BE QUALIFIED BY?
Definition
eDUCTION AND EXPERENCE,TRAINING,AND RESULTS OF ANY QUALIFICATION EXAMS.
Term
Which statement below is NOT a requirement for the tensile strength of a butt weld, including the fusion zone of each specimen?
Definition
The specimen CANNOT break outside of the fusion zone
Term
All Unexposed film shall be stored in a clean,dry place where theconditions will NOT detrimentally affect the?
Definition
Emulsion
Term
When selecting the butt-weld specimens for a welder qual.test,the specimen location may be rotated,provided they are equally spaced around the pipe;however?
Definition
Specimens shall ot include the longitudinal weld(seam)
Term
a COMPANY MAY THEREFORE REJECT ANY WELD THAT APPears to meet theseacceptance standards of API 1104if, in it's opinion?
Definition
If the depth of a imerperfaction may be detrimental to the weld
Term
A Mechanized welding procedure spec shall include?
Definition
Process,Pipe materials,Joint design,and filler metal
Term
The crown surface of the weld should not fall below the outside surface of the pipe,nor should it be raised above the parent metal by more than what for poistion welding?
Definition
1/16 inch
Term
Shielding gases atmosphere to be used shall be qualified for the WHAT and the welding process
Definition
The material
Term
A repair procedure, as a minimum, shall inculde the following?
Definition
A method of exploration of the defect,method of defect removal,examined to confirm complete removal of the defect.
Term
Film or other imaging media shall be processed,handled,and stored so that the images are interpretable when requested by the company for a least how many years?
Definition
Three years(3)
Term
Procedure qualifications with E7018 electrodes also covers production welding with what?
Definition
E9018-m,E7015-H4R. (rule of 5,6,8)
Term
The exposed surface of each fillet welds break specimen shall show?
Definition
Complete penetration and fusion
Term
Level 1 and Level 2 NDT personnel shall be recertified at least every?
Definition
Three years if they are Level 1 and Level 2 testing personnel
Term
Prior to starting a welder qualifiction test, the welder shall ?
Definition
Be allowed reasonable time to adjust the welding equiptment to be used,and use the same techique he will use if he passes the test and is permitted to do production welding
Term
Cracks in welds may be repaired with prior authorization by the company,provided the following criteriais met?
Definition
The length of the crack is less than 8% of the weld,and a qualified repair procedure is used.
Term
The heat affected zone is the ?
Definition
The portion of the base metal that has NOT been melted but where the properties had been altered by the welding heat.
Term
What shade filter plate is needed when observing SUBMERGED ARC WELDING?
Definition
Clear safety goggles
Term
The purpose of POST-WELD heat treatment is to?
Definition
Relive stresses induced by welding
Term
The most extensively used weld inspection is ?
Definition
VT (VISUAL TESTING)
Term
Brazed joints can be destructively tested by which of the following methods?
Definition
Metallographic,Peel, Tension,
Term
When welds are INACCESSIBLE in a finished weld,they should be inspected?
Definition
Durning the progress of the assembly.
Term
A group of joining processes which produce coalescence of matterials by heating them to asuitable temp and by using filler materials having a melting point below 840F and below the melting point of the bases matterial is called?
Definition
Soldering
Term
In braze welding,flux may be applied by which of the following methods?
Definition
Using a filler rod precoated with flux,introducing flux through the oxyfuel,brushing the flux on the joint prior to brazing.
Term
Penetrameters(IQI) are utilized in which method?
Definition
RT (raidographic)testing
Term
The purpose of flux coating on an electrode is to?
Definition
Provide a slag blanket to protect the weld from atmosphere>
Term
Air carbon arc cutting requires?
Definition
An electrode holder,an air supply,may be done manually or mechanically
Term
What defect does NOT occur when a weld is made by GTAW process?
Definition
Slag inclusions.
Term
The weld face refers to the ?
Definition
Exposed surface of the weld on the sidefrom which welding was done.
Term
What is an advantage of the GTAW welding process?
Definition
Joining thin gauge aluminum
Term
In API 1104 code what are the welding procesess?
Definition
shielded metal-arc welding,submerged arc welding,gas tungsten arc welding,gas metal-arc welding,flux-cored arc welding,plasma arc welding,oxyacetylene welding,or flash butt welding.
Term
what are the types of different processesused to make a weld?
Definition
Manual,semi-automatic,mechanized,or automatic technique
Term
What is MECHANIZED WELDING?
Definition
a PROCESSwhere parameters and torch guidance are controlled mechanically or electronically but may be manually varied during welding to matain the specified welding conditions
Term
What gases are used in API 1104,?
Definition
Inert gases,active gases, or mixtures of both.
Term
In any continous 12 inches length of weld, what is the aggregated length of elongated slag inclusions allowed for 30 inch pipe?
Definition
1/2 "
Term
Which of the following essential variables changes would require a requalification of the welding procedure?
Definition
A change in pipe material group,a change in welding position, and a change in vertical direction of welding.
Term
Any length of internal concavity(IC) found by radiograph is acceptable provided?
Definition
The density of the radiographic image of the IC does NOT exceed that of the thinnest adjacent base material.
Term
A repaired area shall be inspected by what means?
Definition
The same means as for the original weld.
Term
Incomplete fusion due to cold lap(IFD) is defined as?
Definition
A discontinuity between two adjacent weld beads or between the weld metal and base metal that is NOT open to the surface.
Term
The tensile-strength test specimens may be?
Definition
Machine or oxygen cut
Term
Which of the following types of defects other than cracks may be repaired WITHOUT prior company authorization?
Definition
Repair of a defect in the cover pass.
Term
To test fillet-welded joints for qualification of a welding procedure for pipe less than 2.375 inches outside diameters requires?
Definition
4 specimens shall be prepared,two test welds.
Term
Weldingprocedure that was qualified in accordance with alternative acceptance standars for girth welds on a twelve-inch pipe with SMAW welding process is qualified for what other pipe size's in production welding?
Definition
9" to 18"
Term
What is the maximum size height ona 1/2" pipe wall CTOD test,in API 1104 standards for girth welds?
Definition
The maximum imperction height shall be no more than 50% of the pipe's wall thickness.1/2 pipe wall=1/4 inch inperfaction
Term
For girth welds what are some of the predicted fatigue causes?
Definition
Hydrostactic testing,installation stress,where applicable,thermal,seismic, and subsidence stress.
Term
Dynamic loading stress analysis shall include loads from what?
Definition
Check valves
Term
To prevent cracking due to welding on a pipeline that is in service, what is used to prevent failures?
Definition
Thermal analysis by computer models.
Term
For welder qualification for in service welding on a longitudinal seam,if the wall thickness is .750" what is the requaired number of specimums to be tested?
Definition
1-tensile,1 nick break,1 root bend,1 facebend
Term
For hydron cracking to occur, what three things must happen?
Definition
Hydrogen in the weld,the development of a crack-susceptible weld microstructure, and tensile stress acting on the weld.
Term
Burning through is unlikely if?
Definition
The wall thickness is.250" or more,provided that low-hydrogen electrodes are used and normal welding practices are used.
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