doubt.doc

7/28/2019 doubt.doc

http://slidepdf.com/reader/full/doubtdoc 1/6

1. The main difference between SS 304 L material and SS 316L material is

a) Titanium presence.b) Columbium/Niobium presence.c) Molybdenum presence.

d) a & b.e) b & c.2. Lap joint flanges are used to avoid.

a) Butt weld.b) Edge weld.c) Dissimilar metal weld.d) All of the above.e) A & b.

3. Which of the following statements must be false.

a) All the ‘ASME’ materials can be ‘ASTM’ material.b) All the ‘ASTM’ materials can be ‘ASME’ material.c) Al the ‘ASTM’ materials cannot be ‘ASME material.d) a & b.e) a & c.

4. Which of the following will be the initial (first) weld.

a) Back weld.b) Backing weld.c) Filet weld in a partial groove.d) Cap pass.

e) Annealing pass.5. ‘ERW’ pipe is not possible in.

a) ASTM 106.b) ASTM 249.c) API 5L Gn 60.d) All of the above.e) a & b.

6. The main difference between SS 304 material and SS 309 material is

a) Chromium Nickel Content.b) Molybdenum Content.c) Ferrite Content,d) a & b.e) b & c.

7. If a job is to be inspected as per AWS D1.1 and if the intermittent (stretch) fillet weld size(not leg length) mentioned as 50 C100), it should be

a) 50 mm fillet weld length with 100 mm gap between two welds.

7/28/2019 doubt.doc


b) 100 mm fillet weld length with 50 mm gap between two welds.c) 50 mm fillet weld length with 50 mm gap between the two welds.d) Non of the above.e)

8. Which of the following standards is meant for flanges.

a) ASME B 16.47.b) ASME B 16.5.c) ASME B16.1.d) All of the above.

9. Magnetic particle inspection methods are recognized as superior to liquid penetratemethod when

a) Inspecting corroded surfaces.b) The surface is anodized.c) The parts are painted.

d) A and C abovee) If the parts are dia magnetic.10. In a low carbon steel radiograph, if a defect forms less density image than sound metal, it

can be

a) Slag.b) Tunston inclusion.c) Copper inclusion.d) Either a or c.e) Either b or c.

11. Conversion for ‘PSI’ (Pounds per square inch) to bar is

a) Divide ‘PSI’ by 14.5b) Divide ‘PSI’ by 14.88c) Multiply “PSI’ by 6.89427d) Divide ‘PSI’ by 6.89427

12. Which of the following is not a discontinuity to rolled products.

a) Seams.b) Laminations.c) Cold Shuts.d) Cracks.e) ‘a’ and ‘d’

13. Seal weld is:

a) A weld primarily designed to provide lightness against leak.b) Weld used to repair Leaks.c) A weld b/w two overlapping members.d) A weld b/w two members at 90o.

14. Peel tests are used to determine the quality of:

7/28/2019 doubt.doc


a) Weld.b) Base metal.c) Bond.d) Flux.

15. In order to pass the tension test, the weld specimen shall have a tensile strength that is notless than;

a) The specified minimum tensile strength of the base metal in annealed condition.b) The specified minimum tensile strength of the base metal at room temperature.c) The specified minimum tensile strength of 100oF.

16. A seam weld is obtained when,

a) A Continuous weld is made on the edge of the metal.b) A continuous weld made b/w two metals at 900.c) A continuous weld made b/w or upon two overlapping members.

17. A contact tube is a device which;

a) Transfers flux to weld area.b) Removes flux from the weld area.c) Delivers gas to the weld area.d) Transfers current to a continuous electrode.

18. DWBJ stands for;

a) Directly welded butt joint.b) Double welded Butt joint .c) Dual welded Butt joint.

19. High temperature brazing is done in the range of ;

a) 750oC 15 1000oC.b) 650oC 15 900oC.c) 500oC 15 700oC.

20. Low temperature brazing is done in the range of ;

a) 350oC 15 800oC.b) 500oC 15 750oC.c) 650oC 15 900oC.

21. High temperature brazing done with material i.e.;

a) Tinb) Granulated brassc) Copper

7/28/2019 doubt.doc


22. Low temperature brazing is done with material i.e. ;

a) Aluminumb) Gold.

c) Silver alloys.23. Atomic hydrogen welding is a combination of;

a) Forging & oxyacetylene weldingb) Arc & Gas welding.

c.Percussion & resistance welding

24. When hydrogen is forced through arc due to intensive heat, its molecules break up intoatoms to form what is to known as ;

a) Atomic Hydrogen.

b) Gas Porosityc) Blow holes.25. Chemical action obtained by igniting a mixture of aluminum powder and iron coke is called

as;

a) Percussion welding.b) Thermit welding.c) Metallic Arc welding

26. How may elements comprise the signature of a single point-culling tool?

a) Ten elements.b) Seven elementsc) Fire elements.

27. Weld overlays and welding of integral cladding shall confirm to

a) SAES - W – 015.b) SAES- W – 014.c) SAES- W – 016

28. Strip welding shall confirm to

a) SAES – W – 015.b) SAES – W – 010c) SAES – W – 020.

29. Seal welding of threaded connections shall cover all exposed threads and shall have asmooth contour between the

a) Two surfaces.

7/28/2019 doubt.doc


b) Three surfaces.c) Four surfaces

30. Use of sealing compounded tapes on joints of seal welding are;

a) Use full.b) Prohibited.c) None of above.

31. Automatic welding with addition of filler metal is

a) Permittedb) Not permitted

None o above32. All penetration containing welds shall be made with;

a) Single passes.b) A multiple passes.c) Triple passes.d)

33. The weld joints shall be completed within;

a) 36 – hours.b) 24 – hours.c) 40 – hours.

34. For the carrier pipes all welds from road, rail road & airport crossing shall be

a) 90 – meter.b) 60 – meters.c) 30 – meters.

35. All welds shall be visually checked prior to other;

a) NDT.b) Atomic hydrogen test.c) Die Penetrate Test.d) None of above

36. Working clearance all around the pipe shall not be less than;

a) 500 mmb) 400 mmc) 600 mm

1. What are the diameter limitations (per pipe size) for different welding processes?

7/28/2019 doubt.doc


SMAW=

GTAW=

GMAW=

2. a) What is the requirement (Material, location) for bridge tacks?

doubt.doc

Documents