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CSWIP 3.2 QUESTIONS > Multi Choice Technology Paper 1 > Flashcards

Multi Choice Technology Paper 1 Flashcards

1
Q

Which value will be an important factor with regards to residual stress ?

A) hardness
B) Yeild Stress
C) UTS Value
D) Charpy Impact Value

A

B) Yeild Stress

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2
Q

To reduce residual stresses , which of the following would be the most effective ?

A)peening
B) Toe grinding
C) post hydrogen release
D) PWHT

A

D) PWHT

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3
Q

A 10mm fillet weld on a carbon steel plate 1000mm long can suffer from distortion if unrestrained or not pre set . Which of the following welding would cause the most distortion in this case ?

A) TIG
B) MAG
C) FCAW
D) Saw

A

A) TIG

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4
Q

Residual stresses are the consequence of ?

A) the material yielding
B) The material not yielding
C) The materials toughness
D) the materials hardness

A

B) The material not yielding

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5
Q

A STRA test :

A) Can give an indication of a materials elongation and ductility

B) is used to measure of a materials proof stress .

C) is a measure of materials proof stress

D) Shows a materials compressive and tensile properties

A

A) Can give an indication of a materials elongation and ductility

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6
Q

Necking :

A) is when the elastic point is reached

B) when the proof stress is reached

C) Is when the specimen has gone past it’s elastic point and moving into the plastic zone

D) is the point just before failure

A

D) is the point just before failure

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7
Q

Highest hydrogen levels would be found in -

A) A weld carried out with an E6013 electrode

B) A weld carried out with an E6011 electrode

C) A weld carried out with an E6018 electrode

D) A weld carried out with an E431N12RR

A

B) A weld carried out with an E6011 electrode

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8
Q

Bend tests ;

A) require complex testing equipment.

B) May be used for the purpose of welder approval

C) May be used for the purpose of welding procedure approval

D) both b and C

A

D) both b and C

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9
Q

A tensile test is considered as a

A) Fatigue failure

B) Ductile failure

C) Stress corrosion failure

D) Cyclic loading failure

A

B) Ductile failure

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10
Q

Fracture testing ;,

A) is frequently used to asses the strength of a fillet weld

B) is Frequently used to asses the strength of a butt weld

C) Detects lack of root penetration in fillet welds

D) both a and c

A

C) Detects lack of root penetration in fillet welds

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11
Q

NDT

A) in penetrant testing a high level of surface cleaning is required to ensure all defects are detected .

B) in penetrant testing the developer is sometimes applied during the dwell time

C) in Penetrant testing on surface breaking defects can be detected ,

D) Both a and C

A

D) Both a and C

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12
Q

In HICC , which of the following statements is not true -

A) it occurs immediately after welding

B) cellulosic electrodes are ideal to avoid HICC

C) Pre heating will increase the chances of HICC

D) all of the above

A

D) all of the above

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13
Q

A radio graphic test cannot reveal

A) the length of a defect

B) The depth of the defect

C) the location of the defect

D) the type of the defect

A

B) The depth of the defect

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14
Q

When designing an EN symbol for a symmetrical fillet weld

A) the size need not be mentioned

B) the length can be mentioned to the left of the symbol

C ) the finished is assumed flat

D) The broken line can be omitted

A

D) The broken line can be omitted

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15
Q

MAG welding ;

A) In the EN classification of welding processes 131 and 135 represents the MAG welding process

B) In the EN classification of welding processes 141 represents the MAG welding process

C) In the EN classification of welding processes 121 represents the SAW welding process

D) None of the above

A

C) In the EN classification of welding processes 121 represents the SAW welding process

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16
Q

Which of the following is the odd one out ?

A) under bead cracking

B) cold cracking

C ) HICC

D) Hot cracking

A

D) Hot cracking

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17
Q

Drooping characteristic-

A) is so called because welding current drops constantly during the welding operation

B) works on the basis of a large change in voltage equals a small change in Amperage

C) Uses a self adjusting arc to balance AMPS and Voltage

D) Works on the Badis that a small change in Voltage equals a large change in Amperage

A

B) works on the basis of a large change in voltage equals a small change in Amperage

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18
Q

The term A% is used ?

A) to determine the Yeild point

B) in Charpy impact testing

C) IN COTD testing

D) to denote elongation

A

D) to denote elongation

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19
Q

Cellulosic electrodes are ?

A) used when hydrogen control is required

B) used when high Deposition is required

C) Always classified as E9010

D) Can be used in all positions

A

D) Can be used in all positions

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20
Q

If the original gauge length of 50mm increases to 55.6mm in all weld tensile test , the percentage elongation is >

55.6 divided by 50 X 100 =

A) 5.6%

B) 10.2%

C ) 11.5%

D) none of the above

A

D) none of the above

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21
Q

When welding carbon steels using MAG process with 100% C02 , WHICH METAL transfer would be used ?

A) Spray

B) Pulse

C ) DIP

D) All options are correct

A

C ) DIP

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22
Q

The purpose of post heating a welded joint is ?

A) to change the microstructure of the weld metal

B) To allow time for the hydrogen to diffuse out

C) To temper the microstructure

D) All options are correct

A

D) All options are correct

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23
Q

ARC BLOW

A) Only occurs when welding with DC -

B) Only occurs when welding with DC +

C) only occurs with AC

D) Both A and B

A

D) Both A and B

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24
Q

Welder qualification.

A) All welders must be qualified in at least 3 different welding processes

B) welders with a qualification in MMA welding are also qualified to weld with the TIG process

C) If NDT is to be conducted on the finished weld it’s not essential that the welder is qualified, however some clients may insist on this .

D) no options are correct

A

D) no options are correct

25
Q

Stainless steel 316 type ;

A) has a flat , slightly decreasing transition range

B) Has a sharpe decreasing transition range

C) Has no transition as it has a FCC structure

D) Changes from FCC to BCC structure as temperature drops and therefore transition range changes accordingly.

A

A) has a flat , slightly decreasing transition range

26
Q

Bend testing ;

A) Has normally a 10% of t as the radius along the four edges of the specimen

B) Has the reinforcement removed before testing to check for the number of runs

C) Has a former size 0.4 x t

D) both b and c

A

A) Has normally a 10% of t as the radius along the four edges of the specimen

27
Q

Macro testing ;

A) Can be omitted during testing if the impact and tensile tests show better than expected results .

B) is always followed by a micro test

C) can detect lack of root fusion

D) Frequently used as an in service check on the internal structure of the joint

A

C) can detect lack of root fusion

28
Q

Which of the following uses a flat characteristic?

A) 111, 141, 121, 136

B) 131, 136 , 121 , 135

C) 111, 121 , 135 , 141

D) All welding processes use both flat and drooping characteristics

A

B) 131, 136 , 121 , 135

29
Q

MAG Welding -

A) DC - IS prefered to DC+ for the welding of most materials .

B) AC pulse current improves the cleaning action

C) The induction controls the rate of spatter and penetration in spray transfer

D) Wire Feed Speed remains constant during the welding operation.

A

D) Wire Feed Speed remains constant during the welding operation.

30
Q

In NDT ,

A) Radiography is the best method for the detection of Lack of sidewall fusion in a single V butt weld .

B) DPI can be used for both surface and subsurface defect detection

C) MPI can be used for both surface and subsurface defect detection

D) UT is the best for the detection of rounded non planar defects

A

C) MPI can be used for both surface and subsurface defect detection

31
Q

Lamellar tearing

A) is a problem associated with Steels of a low through thickness ductility

B) is always associated with steels that have been sensitised

C) is caused by rapid cooling from above the upper critical point .

D) all options are correct

A

A) is a problem associated with Steels of a low through thickness ductility

32
Q

Tensile testing ,

A) is a measure of a materials ability to bend 180

B) Measures the yield strength of a material only

C) Measures Re and Rm of a material

D) is designed to break the material at low temperatures to determine its susceptibility to brittle fracture

A

C) Measures Re and Rm of a material

33
Q

Solidification cracking

A) occurs after PWHT or immediately after welding

B) Occurs up to 24 hours after welding

C) immediately after welding or after a few hours

D) immediately after welding

A

D) immediately after welding

34
Q

Is it necessary for a welding inspector to check the correctness of polarity during welding ?

A) no , not necessary since it does not affect quantity in most cases

B) No , it’s for the welder to take care of

C) yes , it should be checked only when penetration is an important criteria

D) yes , it should be checked by the weld inspector

A

D) yes , it should be checked by the weld inspector

35
Q

Pre heating ;

A) is derived by taking into account the CEV , Hydrogen scale and material thickness

B) Is seldom considered if PWHT is to follow and when using a process with a high arc energy

C) A Is correct but needs more information , I.e , the heat input

D) both a and b are corect but b needs more information

A

C) A Is correct but needs more information , I.e , the heat input

36
Q

EN ISO 1011-

A) May be referred to for pre heat temperatures

B) May be used for the approval of a WPS

C) May be used for the approval of a welder

D) May be used visual inspection requirements of fusion welds .

A

A) May be referred to for pre heat temperatures

37
Q

Stress relieving after welding ;-

A) is normally carried out above the lower critical limit

B) is normally carried out below the lower critical limit

C) is always carried out on high tensile strength materials .

D) Both a and B could be applicable, it would depend on the materials CEV

A

B) is normally carried out below the lower critical limit

38
Q

Proof stress is ;

A) Used to prove that the residual stresses are acceptable.

B) A measurement used in certain types of tensile testing.

C) To determine the UTS of aluminium.

D) Will determine the transition range

A

B) A measurement used in certain types of tensile testing.

39
Q

RM is the term used to express the -

A) Yeild point of the material .

B) Elastic point of the material

C) Elongation of a material

D) Maximum load applied .

A

D) Maximum load applied .

40
Q

GMAW welding

A) Can be used in all positions

B) Can be used in the PA , Pb , and PC positions

C) Dip,transfer can only be used in all positions .

D) Both Dip and Pulse can be used in all positions.

A

D) Both Dip and Pulse can be used in all positions.

41
Q

Which of the following processes cannot be used on C/Mn steel material ?

A) MIG

B) MMA

C) SAW

D) All of the above can be used on C/Mn steels

A

A) MIG

42
Q

SAW welding ;

A) In a multiple wire system is not recommended to use AC

B) DC + generally produces deeper penetration when compared with AC

C) DC + generally produces deeper penetration when compared with AC

D ) DC - generally produces deeper penetration when compared with DC +

A

B) DC + generally produces deeper penetration when compared with AC

43
Q

MMA, TIG and SAW all

A) use a flat characteristic output.

B) Use a drooping characteristic output

C) Use both drooping and flat characteristic output.

D) Both MMA and TIG use a drooping characteristic outputs , SAW can use a flat characteristic output.

A

D) Both MMA and TIG use a drooping characteristic outputs , SAW can use a flat characteristic output.

44
Q

The Heat input for a MMA weld made using 22Volts , 250 amps and 250mm per min travel speed would be ?

A) 1.54KJ/mm

B) 1.05KJ/mm

C) 1.05KJ/CM

D) 1.54Kj/cm

A

B) 1.05KJ/mm

22 x 250 x 60 = 33000

250 x 1000 = 25000

33000 divided by 25000 = 1.32 mm

1.32 x 08 ( process ) = 1.05Kjmm

45
Q

In MMA welding, to improve deposition, which of the following will be useful?

A) Change from DC + to DC -

B) Change from DC - to DC +

C) Change form AC to DC +

D) Change from DC- to AC

A

A) Change from DC + to DC -

46
Q

When a set of mechanical tests are done to a Qualitative , quantities , qualitative measurement , the tests would be ?

A) Impact , bend , and fracture

B) Bend , hardness and fracture

C) tensile , impact and hardness

D ) Macro , fracture and tensile

A

C) tensile , impact and hardness

47
Q

The ductile to brittle transition is associated with what type of mechanical test ?

A) Tensile

B) Impact

C) Hardness

D) Fillet fracture

A

B) Impact

48
Q

The four edges of a bend test specimen have a radius added because ?

A) improve bending

B) Prevent cracking

C) Prevents cuts to the operator

D) To stop Spring back

A

B) Prevent cracking

49
Q

The Yeild point of a C/Mn steel within a tensile test is where ?

A) The material is in an elastic condition

B) The material has become plastic ally deformed

C ) The material has formed

D ) Is where the UT has been reached

A

B) The material has become plastic ally deformed

50
Q

The UTS within a tensile test is where ?

A) The load is at its maximum

B) The load is beginning to fall and then failure

C) The Yeild has been reached and failure occurs immediately

D) A and B are correct

A

A) The load is at its maximum

51
Q

Percentage elongation is ?

A) The total length of a completed tensile test

B) The additional length gained after a tensile test

C) The original length of a tensile sample

D) The failure mode induced during a tensile test

A

B) The additional length gained after a tensile test

52
Q

If a tensile test fails in the weld :

A) It must be rejected as failure should occur in the HAZ

B) As long as the UTS of the parent material is reached it should be acceptable

C) The test should be re taken with an over matching filler material

D) There is probably a defect in the weld area

A

B) As long as the UTS of the parent material is reached it should be acceptable

53
Q

Side Bend test ;

A) Put the root in compression and the face in tension

B) Put the face in compression and root in tension

C) Put the root and face in compression and tension

D) Only the face in in tension

A

C) Put the root and face in compression and tension

54
Q

The removal of excess weld metal for bend testing is done ?

A) Only to the side that’s in contact with the former

B) To both root and face

C) Need not be done as the whole weld is being tested

D) To the side that’s in tension

A

B) To both root and face

55
Q

Impact test specimens are taken from -

A) The lowest heat input area

B) The highest heat input area

C) The start position

D) the stop position

A

B) The highest heat input area

56
Q

Hardness test specimens are taken from the -

A) The highest heat input area

B) The centre of the specimen

C) The lowest heat input area

D) from the easiest position to access

A

C) The lowest heat input area

57
Q

Tensile tests cannot be taken from

A) Pipe butt welds

B) Material below 5mm thick

C) Fillet welds

D ) single bevel bee butt welds

A

C) Fillet welds

58
Q

A high hardness result could be due to ?

A) heat input too high

B) Too much pre heat

C) The use of PWHT

D) A lack of pre heat

A

D) A lack of pre heat

59
Q

Which welded material would perform best in an impact test ?

A) HSLA

B) C/Mn steel

C) 316L Stainless steel

D) High carbon steel

A

C) 316L Stainless steel

CSWIP 3.2 QUESTIONS (4 decks)

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