world centre for materials joining technology

Welding Inspection: Multi-Choice Questions Paper 4 (Rev. 3)

1. Which of these drawing symbols shows weld penetration depth in accordance with BS EN 22553?

2. BS EN 288 & BS EN ISO 15614 are specifications for.......

A welder approval testingB welding equipment calibrationC welding procedure approvalD consumables for submerged arc welding

3. What determines the penetrating power of Gamma rays?

A timeB type of isotopeC source-to-film distanceD source strength

4. Which element has the greatest effect on the HAZ hardness of carbon-manganese steel?

A MolybdenumB ChromiumC TitaniumD Carbon

5. Pre-heating a steel plate with a carbon equivalent value (CEV) of 0.48 may be required in order to ........

A drive out moisture from the plateB prevent excessive hardening in the HAZC prevent the formation of carbidesD improve the mechanical properties of the weld metal

6. A welder approval certificate should be withdrawn if .........

A he has not done any welding for a period of 4 monthsB he has been absent from work for a period of 7 monthsC the repair rate for his welds exceeds 1%D his work has been examined by UT only

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world centre for materials joining technology

Welding Inspection: Multi-Choice Questions Paper 4 (Rev. 3)

7. In friction welding, the metal at the interface when the joining occurs is described as being in the ..........

A liquid stateB inter-critical stateC plastic stateD elastic state

8. A penetrameter (IQI) is used to measure .........

A the size of a discontinuity in a weld jointB the density of a radiographic filmC the degree of film contrastD the quality of the radiographic technique

9. Which of the following cutting methods is suitable for cutting stainless steel?

A plasmaB oxy-acetylene C oxy-propaneD it depends upon the thickness

10. Which of the following would be classed as the most serious type of defect?

A a buried linear slag inclusionB buried lack of inter-run fusion C surface breaking lack of sidewall fusion D surface porosity

11. Ultrasonic testing has an advantage over other NDT methods for the detection of ........

A lack of sidewall fusionB root undercutC incompletely filled grooveD root concavity

12. Exceeding the maximum inter-pass temperature specified for a C-Mn steel weld joint, may give .......

A excessive porosityB burn throughC lower toughnessD higher strength

13. MIG/MAG welding has a tendency to give lack of sidewall fusion when ........

A spray transfer conditions are usedB 100%CO2 shielding gas is usedC pulsed current is usedD dip transfer conditions are used

14. The temperature range over which a steel goes from having high toughness to low toughness is called ....

A the critical transformation temperatureB the ductility dip temperatureC the bi-modal temperatureD the transition temperature

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world centre for materials joining technology

Welding Inspection: Multi-Choice Questions Paper 4 (Rev. 3)

15. For SAW, what is the effect of raising arc voltage but keeping with all other parameters the same?

A the weld bead width will increaseB the depth of penetration will increaseC the weld bead width will decreaseD the depth of penetration will decrease

16. Changing an essential variable (beyond the allowed limits) for a qualified welding procedure ........

A may change the mechanical properties of the jointB may adversely affect the quality of the weldC will require a new welding procedure to be approvedD all of the above

17. With reference to the various grades of stainless steels, which of the following statements is true?

A they are all non-magneticB they all require 100% Ar for GMAWC they all have very high thermal conductivityD only certain grades can be used for service at very low temperatures

18. Which of the following AWS A5.1 electrodes has a rutile covering .........

A E 6010B E 7016C E 7018D E 6013

19. Welds made with very high heat input will show a reduction in .........

A tensile ductilityB notch toughnessC fatigue strengthD creep resistance

20. During PWHT of a complex fabrication, it is heated to the soak temperature at a much faster rate than specified by the procedure. This may .........

A cause excessive oxidationB not allow sufficient time to relieve stressesC introduce excessive compressive stressesD cause distortion

21. When MAG welding in dip transfer mode (short-circuiting mode) spatter can be reduced by ...........

A using inductanceB using 100% CO2

C using Ar + 30%HeD increasing the stick-out length

22. Repair welding of in-service plant and equipment may be more difficult than making repairs during initial fabrication because ........

A the material may be contaminatedB access to repair area may be difficultC positional welding may be needed D all of the above may be factors

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world centre for materials joining technology

Welding Inspection: Multi-Choice Questions Paper 4 (Rev. 3)

23. For gamma radiography of a steel weld at 35mm thick, the recommended isotope is ..........

A Thulium 170B Ytterbium 169C Iridium 192D Cobalt 60

24. The sensitivity of a radiograph is assessed ........

A by using a densitometerB by using an image quality indicator ( IQI )C from the kVA usedD from the source/tube to work “stand-off” distance used

25. A transverse tensile test, from a Weld Procedure Approval Record (WPAR) test plate, is used to measure ......

A the tensile strength of the weldB the tensile strength of the jointC the stress/strain characteristics of the weldD the stress/strain characteristics of the joint

26. The highest and lowest heat input positions are considered to be ..........

A PB highest; PA lowestB PE highest; PC lowestC PD highest; PB lowestD PF highest; PG lowest

27. What type of covering will an electrode have that is suitable for welding 60mm C-Mn steel and can give good weld metal toughness at -50°C? .......

A rutileB basicC cellulosicD choice will depend on the welding position

28. The dip transfer mode (or short-circuiting mode) of metal transfer used for MIG/MAG welding is characterised by ........

A giving deep penetration B being suitable for positional weldingC giving low spatterD giving high deposition rate

29. Carbon equivalent values (CEV) are used to determine the how to avoid the risk of ........

A hydrogen crackingB lamellar tearingC solidification crackingD weld decay

30. When 2 different material types are welded together, the joint is referred to as ........

A a composite jointB a transition jointC an autogenous weldD heterogeneous joint

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