Piping Isometrie symbols
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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...
QA/QC Saudi Arabia CBT Exam Questions Answer
1) What is the package number and explain? Package one stands for Distillation & Hydro treating unit. Different units are 91/92- High Pressure Hydro Desulphurization 101/102- Low Pressure Hydro Desulphurization 111/112-Naphtha Hydrotreater Unit 151/152- Distillation and Hydro treating Hydrogen Unit 155- Off Gas PSA Unit 150-Hydrogen storage unit 011/012- Crude Distillation Unit/ Vacuum Distillation Unit 2) What are the duties & responsibilities of a welding inspector? Perform material inspection. Perform consumable inspection. Application of inspection gauges, instruments and tools. Check equipment and accessories. Witness procedure qualification test. Witness welder qualification test. Perform visual inspection. Review / witness NDT Witness mechanical test. Monitor heat treatment Observe production and fabrication welding. Interpret and assure compliance to Code / Standard / Specification. Review technical drawing. Witnes...
ARAMCO - CBT QC WELDING INSPECTORS INTERVIEW QUESTIONAIR FOR ARAMCO PART-3
76) What are the tests required for verifying supplementary essential variables? Notch toughness
77) How will you calculate the geometric unsharpness in radiographic film?
Geometric unsharpness of the radiograph shall be determined in accordance with:
Ug = Fd/D
where
Ug = geometric unsharpness
F = source size: the maximum projected dimension of the radiating source
(or effective focal spot) in the plane perpendicular to the distance D from
the weld or object being radiographed, in.
D = distance from source of radiation to weld or object being
radiographed, in.
d = distance from source side of weld or object being radigraphed to film.
78) What is the welder qualification based on f number? 79) Which markers are used on SS materials?
Low halogens and Low sulfur less than 200 ppm
80) Principle of UT
Reflection of Sound 81) Principle of RT
Absorption in different materials
82) Principle of PT
Capillary action
83) Principle of MT
Magnetic flux l...
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