Piping Isometrie symbols
ARAMCO CBT QUESTION WITH ANSWER & WELDING QC INSPECTOR
41)If Mechanical damage occurred on base metals what will be your course of
action?
If any Mechanical damage found on the base metal, conduct the thickness
measurement and Magnetic Particle Test or Penetrant Test to be conducted, if
it is within tolerance accept it otherwise submit the report to higher authority for
further action.
42)You have observed in the specimen certain defects, why do you consider it as
important and do the report of it, state two planar defects? What are causes for
the occurrence of it and how will you avoid it?
Defects: Is a rejectable one i.e., a discontinuity which exceeds the code limits is
defects. Depending up on the conditions and severity it has to be repaired.
The two planar defects are i) Lack of side wall fusion ii) Undercut.
i) Lack of side wall fusion: Contaminated surface may due to oil, grease, and
rust etc., and too narrow gap, current very low and improper manipulation of
electrodes.
Prevention: Bevel ends sh
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