Technology 4

1. How could arc blow be avoided?

A. Use AC

B. Use DC –ve

C. Use DC +ve

D. Increase travel speed

2. during a transverse tensile test the first stage the specimen goes through is

know as

A. plastic stage

B. Elastic stage

C. Deformed stage

D. UTS stage

3. Which of the following arc design is preferred in cyclic loading condition?

A. View A

B. View B

C. View C

D. View D

4. The WPS calls for a root gap to be between 2mm and 3mm, the actual

measure gap is 4mm what course of action would you take?

A. Accept it as its only 1mm

B. Reject it

C. The welder will decide, if it falls it will be his problem

D. Welder insists he can weld the butt joint easily so let him go ahead

5. Which tension electrode is usually used to weld Aluminum?

A. zirconiated

B. Thoriated

C. Large diameter

D. Pointed electrodes

6. A procedure is a document which is,

A. specific the way to carry out an activity on a process

B. provide bending legislative rules that are adopted by an authority

C. specific which a resource shall be applied by whom and when, to specific project

product process or contract

D. A written and verbal description of the precise steps to be followed

7. Which one these statements are true concerning solidification cracking?

A. Only occur in MMA welding

B. Increase depth to width ratio will increase stress

C. Never occurs in MIG MAG welding

D. All of the above.

8. Which one of these test would most probably used for welder qualification on

a plate butt weld using 13mm low carbon steel

A. CTOD

B. Nick break test

C. Fracture fillet test

D. IZOD

9. An arc strike on a high carbon steel plate is likely to have the following

microstructure beneath its surface

A. Austenite

B. Martensitic

C. Ferrite

D. Pearlite

10. If the torch was trailing when using the MIG MAG process which of the

following of weld is most likely to be observed during visual inspection?

A. No undercut and shallow penetration

B. Severe undercut and deep penetration

C. Moderate undercut and penetration

D. Minimum undercut and excess weld metal

11. The welder has increased the electrode strike out length of the SAW set, what

would be effect on the weld?

A. No effect

B. Weld width would be narrow

C. Penetration will be increased

D. The deposition rate will be greater if wire feed rate is increased also

12. Who should have access to the WPQRS?

A. NDT operators

B. Inspectors only

C. Welders only

D. Welding engineers

13. Half life is a term used to describe

A. The penetrating ability of a gamma ray source

B. Half the time the gamma source will be useful

C. The time taken of the gamma source to reduce the strength by half

D. Time of decay of an X ray tube

14. A typical minimum OCV requirement of MMA (111) using basic electrodes

would be

A. 70 Volts

B. 40 Volts

C. 100 Volts

D. 20 Volts

15. Why the OCV voltage capped at the certain level

A. Save the electricity

B. Reduce the risk of fatality

C. Prevent the explosion of consumables

D. Allow smooth transmit ion into welding voltage range

16. Austenitic stainless steel are not susceptible to HIC because

A. They are non magnetic

B. They are stainless and contain chromium

C. They don’t harden during heating and cooling

D. They are highly ductile

17. Which type of weld would you associate with the joint below

A. A plug in a T joint

B. A plug weld in a edge joint

C. A fillet weld in a corner joint

D. A edge weld on a lap joint

18. In a martens tic grain structure which of the following mechanical properties

would be more likely to increase

A. ductility

B. hardness

C. brittleness

D. toughness

19. Who should select specific weld for NDT, to cover the 10% contractual %

required by the specification/ code?

A. Anyone can select the weld as it’s a random check

B. The welders, as he knows which weld are likely to produce the least defect.

C. This weld referenced in a inspection and test plan

D. Nobody, as welding is always carried to high standard to use of % NDT is of no

real value

27. What is the greatest disadvantage of radiography inspection? A. Its inability to size defect accurately

B. The physical size of equipment

C. The skill level of operator

D. The harmful effect of ionization radiation

28. A solidification cracks normally occurs where?

A. Thought the HAZ

B. Longitudinal through the weld central line

C. Transverse through the weld

D. Can occur anywhere

29. Which of the following inspection point is most critical in effecting arc

condition during the spray transfer MAG welding?

A. All electrical connection and contact

B. Gas flow rate

C. Induction setting

D. Electrode coating type

30. Which of these statements are true concerning lamellar tearing? A. A hydrogen level increase lamellar tearing which more likely

B. As material thickness increase ductility decease making lamellar tearing more

likely

C. Lamellar tearing occur in a HAZ

D. Lamellar tearing effect all type of joints

31. Rutile electrodes are often sold packed in cardboard box covered with a

plastic film, if upon you found they were damp and the ends were rusting what

course of action would you recommended?

A. Use them as a rutile electrode for only purpose welding

B. Re dry at 120 degree C and issue to the shop floor

C. Quarantine them

D. Only use them for tack welding

31. In welder qualification testing of 10mm plate, 2 roots and 2 face bends were

tested, 1 root bend failed. What course of action would you follow?

A. Accept them as 75% were acceptable, you are allowed one failure

B. Two more root bend should be prepared and tested

C. Two more root and 2 more face bends should be prepared and tested

D. retests the welder

32. Assuming the same material and welding procedures were used. Which of

the following would require the highest preheat?

A. Butt weld in 35mm plate

B. Cruciform joint in 25mm Joint

C. T joint butt weld in 30mm plate

D. T joint butt weld in 20mm plate

33. A high level of surface cleaning is important period to penetrant testing in

order to A. The reduce the amount of penetrate used

B. Reduce the level of false identification

C. Ensure a good bound for the developer

D. Improve the viscosity of the penetrate

34. A typical min OCV requirement for MMA using either rutile or cellulosic

electrode would be

A. 40 Volts

B. 120 Volts

C. 100 Volts

D. 50 Volts

35. The main problem with solution treatment of stainless steel is that A. Controlling the rate of temperature rise

B. Controlling the cooling rate

C. Length of the soak period

D. High risk of distortion

36. An advantage of MMA welding process is that it,

A. As higher current density as SAW welding

B. As a very large range of consumable for most of the welding application

C. No core wire is lost during the process

D. Require the lower skill level than other manual forms of welding

37. While inspecting a weld on a 100mm thick high carbon steel plate with a

tolerance of +5mm, you noted the weld visually acceptable however the parent

material as several arc strikes present adjacent the weld approximately 3mm

deep. What course of action would you take?

A. None, I am only inspecting the weld

B. Recommended that the area be dressed smooth

C. Recommended that the area be dressed smooth followed by MPI

D.

38.

39. What unit of measurement is used for the charpy impact testing?

A. Joules

B. N/mm^2

C. KJ

D. VPN

47. When transverse tensile testing a welded joint the excess weld metal often

removed. This action is done to

A. Allow the test piece to fit accurately into the equipment

B. Reduce the stress concentration to weld toe

C. Allow strain to place over the weld face area

D. Allow weld metal ductility to be measured

48. Charpy impact test show a 50% rough torn surface and 50% flat crystalline

surface after the completed test, this would indicate which type of failure?

A. Fatigue to brittle

B. Ductile to Brittle

C. Ductile with gross yielding

D. Fatigue to ductile

49. A STAR test is carried out to determine which of the following

A. A quick indication of weld quality for welder qualification test

B. The test result can be used to verify that the material has not been adversely

mechanically damaged by the heat during welding

C. An indication of material elongation properties

D. An indication of through thickness ductility (in the Z direction)

50. Due the high heating effect in the electrode when TIG wit AC, it is important

that a tungsten electrode used for AC welding is

A. Ground to a fine vertex angle of less than 30 degree before welding

B. Use the straight from the packet without any grinding

C. Lightly ground to a slight chamfer (corners only remove)

D. Use without grinding and backed at 300 degree C for an hour before use

51. An advantage of SAW process is that

A. It can be used in the vertical down (PG) position

B. Little or No ozone or UV Light is produced / emitted.

C. It is not affected by arc blow

D. It is not prone to solidification cracking

52. When welding vertically up with MMA process weaving is sometimes

restricted to 2.5 x electrode diameter, this restriction is mainly applied to

A. reduce the overall width of the weld

B. Limit the heat input into the joint

C. reduce the no. of electrode in the joint

D. Reduce the time require to finish the weld

53. A PWHT may also be of benefit in minimizing the risk of weld decay. This

heat treatment would be called

A. stress relief

B. Normalizing

C. Quenching and tempering

D. Solution treatment over 1000 degree C

55. What does the term WPS mean?

56. With regards to lamellar tearing buttering layer will?

A. improve toughness

B. Improve hardness

C. Improve ductility

57. Which of the following electrode type produce lowest level of hydrogen?

58. Why it is necessary to preheat the material before welding?

59 What is minimum range of illumination required as per BS EN Standard?