Arab QC

Q. 1/30: You notice that the joint preparations are not shown on the Engineering drawing for a set in nozzle attachment. Which of the following preparations would be suitable when a full penetration weld was required?

Single bevel butt joint

Fillet joint

Lap joint

Corner weld

Please select an option and click submit.

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Q 1/30

Test Progress : 3.33%

Q. 2/30: You notice that the joint preparations are not shown on the Engineering drawing or the WPS. In the case of a set on nozzle attachment which of the following joint preparations would be the most suited?

Open corner joint

Fillet joint

Single bevel butt joint

Single V butt joint

Please select an option and click submit.

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Q 2/30

Test Progress : 6.67%

Q. 3/30: The fabricator suggests to you that it would be much more cost effective to weld up the pressure vessel from the out side only without any back gouging. The WPS shows all the main barrel sections and dished end to barrel joints are full penetration butt w

Yes, SAW welding can be used from one side providing the root gap is greater than 3mm

Yes, SAW welding can be used from one side and would provide a much stronger joint when compared to a back gouged joint

No, SAW welding would never be considered on any material <50mm thickness

No, the SAW welding process can’t be used on a open root joint welded from one side only

Please select an option and click submit.

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Q 3/30

Test Progress : 10.00%

Q. 4/30: When considering distortion, which of the following butt weld preparations would be the most suited for the longitudinal welded main barrel joints?

Double U but weld

Single V butt weld

Single U butt weld

All options would produce the same amount of distortion

Please select an option and click submit.

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Q 4/30

Test Progress : 13.33%

Q. 5/30: The fabricator proposes to you that he wishes to reduce the bevel angle from 45° to 30° on the set on nozzle joints. Which of the following issues may occur if this was permitted?

"The reduction in bevel angle may result in an increase in distortion"

The reduction in bevel angle may result in a greater risk of lack of fusion and would not be compliant with the specification

The reduction in bevel angle would result in requalification of all the welders

All options may apply

Please select an option and click submit.

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Q 5/30

Test Progress : 16.67%

Q. 6/30: Which distortion control technique is referenced in the TWI specification?

Raised heat input technique

Back welds

Back skip welding

Full penetration welds

Please select an option and click submit.

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Q 6/30

Test Progress : 20.00%

Q. 7/30: In accordance with the TWI Specification would it be permissible to hard stamp the vessel’s material for the purpose of material identification?

Yes, any hard stamping is permitted providing the information is on both ends of the material

No, hard stamping isn’t allowed in any situation

Yes, hard stamping is permitted providing a low stress concentration die is used.

No options are correct

Please select an option and click submit.

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Q 7/30

Test Progress : 23.33%

Q. 8/30: During fit-up you notice that the longitudinal seams have two different bevel angles on one joint, top bevel 50°, bottom bevel 15°. Is this permitted in accordance with TWI Specification?

No, under no situation shall different bevel angles be permitted on a single V joint

Yes, providing the joint is welded either in the overhead or vertical horizontal positions

No, the bevel angles stated are out of specification

Yes, As long as there is access this would be acceptable

Please select an option and click submit.

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Q 8/30

Test Progress : 26.67%

Q. 9/30: While inspecting the completed vessel, you notice that some of the longitudinal seams on the main barrel section are in line with each other, ie not offset:

This would be permitted providing the linear misalignment doesn’t exceed 1.5mm

This is not permitted all longitudinal seams shall be off set to each other by 90°

The TWI Specification makes no mention of this requirement

This would be permitted providing the angular misalignment doesn’t exceed 3°

Please select an option and click submit.

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Q 9/30

Test Progress : 30.00%

Q. 10/30: The fabricator wishes to reduce welding time and distortion on the longitudinal and circumferential welds, which of the following will best achieve this?

Single V butt joints, welded by the MMA process

Double V butt joints, welded by the SAW process

Double U butt joints, welded by the SAW process

Heterogeneous welds

Please select an option and click submit.

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Q 10/30

Test Progress : 33.33%

Q. 11/30: You notice at the test house that root and face bends are being conducted with a 50% reduction in the former diameter than that stated in the specification. What difference would this make to the testing conditions?

This should make no difference as long as the bend is to the correct angle

This is common practice when reinforcement is left in place

This would put excessive stress on the specimen

No options are correct

Please select an option and click submit.

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Q 11/30

Test Progress : 36.67%

Q. 12/30: Continuing with the witnessing of bend testing, you notice that the excess weld metal has not been removed. Are there any consequences attached to this practice?

When bends are tested in this manner, the test is much more accurate as all the weld is under test

The excess weld metal is only removed if it is excessive

The excess weld metal could give rise to stresses

Only the part in contact with the former requires the excess weld metal to be removed

Please select an option and click submit.

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Q 12/30

Test Progress : 40.00%

Q. 13/30: Testing has just been completed on a single sided butt weld procedure, 10mm thick, PA position using the MMA process. Which mechanical tests would you expect to find within the documentation?

1 transverse tensile, two transverse side bends, impact tests 1 set of 3, Hardness test one specimen and macro examination

2 transverse tensile, two transverse bends-1root and 1 face bends, impact tests 1 set of 3, Hardness test one specimen and macro examination

2 transverse tensile, two transverse root and 1 face bends, hardness test one specimen and macro examination

2 transverse tensile, two transverse side bends, impact tests 1 set of 3, Hardness test one specimen and macro examination

Please select an option and click submit.

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Q 13/30

Test Progress : 43.33%

Q. 14/30: You are checking the test report for a transverse tensile test on a 16mm butt weld with a UTS value of 460N/mm². Which of the following sets of tensile samples would fail the test?

Test 1 failed in parent metal at 414 N/mm², test 2 failed in weld metal at 555N/mm²

Test 1 failed in parent metal at 420 N/mm², test 2 failed in weld metal at 480N/mm²

Test 1 failed in parent metal at 435 N/mm², test 2 failed in weld metal at 498N/mm²

Test 2 failed in weld metal at 498N/mm², test 1 failed in parent metal at 435 N/mm²

Please select an option and click submit.

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Q 14/30

Test Progress : 46.67%

Q. 15/30: Charpy impact tests have been conducted on a 16mm single V butt joint. Which of the following set of results would meet the specification?

Average of set 30 joules, lowest individual value 20 joules

Average of set 40 joules, lowest individual value 32 joules

Average of set 38 joules, lowest individual value 35 joules

Average of set 42 joules, lowest individual value 28 joules

Please select an option and click submit.

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Q 15/30

Test Progress : 50.00%

Q. 16/30: A welder qualifies in C Mn steel, 10mm thick, MMA process using low hydrogen electrodes, PC position using DC- polarity. Which one of the following is the welder not qualified for?

C mn steel, 20mm thick, MMA process, rutile electrode, PB position, DC

C mn steel, 6mm thick, MMA process, rutile electrode, PA position, DC

C mn steel, 15mm thick, MMA process, low hydrogen electrode, PC position, DC

C mn steel, 15mm thick, MMA process, rutile electrode, PE position, DC

Please select an option and click submit.

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Q 16/30

Test Progress : 53.33%

Q. 17/30: A charpy impact test is devised to test samples at different temperatures. What does this hope to establish?

A transition range from ductile to brittle

The Rm of the material

The Re of the material

The relationship between hardness and tensile strength

Please select an option and click submit.

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Q 17/30

Test Progress : 56.67%

Q. 18/30: The point at which the Rm is reached in a tensile test is also referred to as the:

Yield point

UTS

Gauge length

Please select an option and click submit.

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Q 18/30

Test Progress : 60.00%

Q. 19/30: If a tensile test specimen fails to meet the required value, what action can be taken?

Two more test welds are required which will require complete testing

One more test sample can be submitted

If the specimen is large enough, two more tests can be done

As many test welds as required can be submitted until the tests meet the specification

Please select an option and click submit.

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Q 19/30

Test Progress : 63.33%

Q. 20/30: In a procedure qualification in 10m thick material welded in the PF position when impacts are not specified, which position(s) is the procedure qualified for?

PA, PC

PF, PG

All positions

PF only

Please select an option and click submit.

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Q 20/30

Test Progress : 66.67%

Q. 21/30: While inspecting some cast duplex valve bodies one of your inspectors asks if the castings require a heat treatment process. Which of the following would most likely be applied to these items?

Solution annealing

Quench hardening

No heat treatment required

Stress relieving would be required but only after welding if applicable

Please select an option and click submit.

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Q 21/30

Test Progress : 70.00%

Q. 22/30: A set of fabricated brackets manufactured from 316L stainless steel is about to be heat-treated, which of the following applies?

This material is always stressed relieved after welding

A post weld heat treat isn’t generally conducted on this type of material

Quench hardening would always be applied to this material to increase toughness after welding

All options are incorrect

Please select an option and click submit.

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Q 22/30

Test Progress : 73.33%

Q. 23/30: During the post weld heat treatment of a small welded fabrication, you observe the heat treatment personnel applying heat by a heating torch. In accordance with TWI Specification do you consider this an acceptable practice?

Yes this is acceptable providing the temperature attained and the soaking times are correct in accordance with the approved PWHT procedure

Yes this is acceptable providing the thermocouples are correctly placed and calibrated

No, this application method isn’t acceptable

2 options are correct

Please select an option and click submit.

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Q 23/30

Test Progress : 76.67%

Q. 24/30: Unfortunately the stress relieving of a welded fabricated steel structure hasn’t been witnessed by any of your inspectors. When you review the PWHT chart you notice only 2 thermocouples have been used. In accordance with the TWI Specification do you consi

No, all PWHT shall be witnessed and a minimum of 3 thermocouples shall be used

Yes, only the PWHT charts require reviewing by inspectors

No, all PWHT shall be witnessed, an inspector has to be present 100% of the time throughout the PWHT process

No, a minimum of 3 thermocouples shall be used, and calibration certificates require checking prior to the heat treatment process

Please select an option and click submit.

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Q 24/30

Test Progress : 80.00%

Q. 25/30: It is a requirement for a quenched and tempered component to undergo post weld heat treatment, one of your inspectors asks you what is the maximum temperature required for this material. Which of the following is correct in accordance the TWI Specificatio

The same as for C/Mn steel

You would never permit a PWHT to be carried out on this material

The TWI Specification doesn’t reference this information, but would expect it to be around 680°C

All options are incorrect

Please select an option and click submit.

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Q 25/30

Test Progress : 83.33%

Q. 26/30: During Post Weld Heat Treatment, what sequence of events occurs to the properties of the material?

Yield strength increases, stresses decrease then yield strength decreases

Ductility decreases, stresses increase then ductility increases

Yield strength decreases, stresses decrease then yield strength increases

Stresses increase, stresses decrease then yield increases

Please select an option and click submit.

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Q 26/30

Test Progress : 86.67%

Q. 27/30: After a PWHT process has been carried out on some thick to thin C/Mn pipe spools (12.5mm to 25mm WT) you notice that the heating rate is recorded at 200°C/Hr. In accordance with the TWI Specification is this correct?

No, it should be a minimum of 220°C/hr

No, it should be 40°C/hr

Yes, Providing the cooling rate is the same

es, providing the cooling rate is 220°C/hr

Please select an option and click submit.

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Q 27/30

Test Progress : 90.00%

Q. 28/30: While reviewing the heat treatment chart for a PWHT process you notice that the temperature is not recorded below 150°C on the cooling cycle. Would you accept this chart?

No, the temperature must be recorded down to room temperature

It would depend on the thickness and grade of material as to whether this would be acceptable or not

No, the temperature has to be recorded to at least 110°C

The TWI Specification doesn’t reference this information.

Please select an option and click submit.

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Q 28/30

Test Progress : 93.33%

Q. 29/30: In certain cases heat treatments are conducted on cold work components such as cold rolled, steel plate. Which of the following heat treatments would you expect to be conducted on these components?

Stress relieving

Densensitization

Quench hardening

Post hydrogen release

Please select an option and click submit.

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Q 29/30

Test Progress : 96.67%

Q. 30/30: You notice from your records you don’t have an inspection report for a component that has undergone a PWHT. In this case what would your course of action be?

It would be acceptable, If the component had a full inspection report before PWHT

The TWI Specification makes no reference of this, so you would have to seek advice

It is a requirement that all components undergo full inspection after a PWHT process has been conducted; in this case it would not be acceptable

As long as no welding has be conducted after the PWHT process, this would be acceptable

Please select an option and click submit.

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Q 30/30

Test Progress : 100.00%

CSWIP 3.2 Test 1:

Q. 1/30: You notice that the joint preparations are not shown on the Engineering drawing for a set in nozzle attachment. Which of the following preparations would be suitable when a full penetration weld was required?

Please select an option and click submit.

Q 1/30

Q. 2/30: You notice that the joint preparations are not shown on the Engineering drawing or the WPS. In the case of a set on nozzle attachment which of the following joint preparations would be the most suited?

Please select an option and click submit.

Q 2/30

Q. 3/30: The fabricator suggests to you that it would be much more cost effective to weld up the pressure vessel from the out side only without any back gouging. The WPS shows all the main barrel sections and dished end to barrel joints are full penetration butt w

Please select an option and click submit.

Q 3/30

Q. 4/30: When considering distortion, which of the following butt weld preparations would be the most suited for the longitudinal welded main barrel joints?

Please select an option and click submit.

Q 4/30

Q. 5/30: The fabricator proposes to you that he wishes to reduce the bevel angle from 45° to 30° on the set on nozzle joints. Which of the following issues may occur if this was permitted?

Please select an option and click submit.

Q 5/30

Q. 6/30: Which distortion control technique is referenced in the TWI specification?

Please select an option and click submit.

Q 6/30

Q. 7/30: In accordance with the TWI Specification would it be permissible to hard stamp the vessel’s material for the purpose of material identification?

Please select an option and click submit.

Q 7/30

Q. 8/30: During fit-up you notice that the longitudinal seams have two different bevel angles on one joint, top bevel 50°, bottom bevel 15°. Is this permitted in accordance with TWI Specification?

Please select an option and click submit.

Q 8/30

Q. 9/30: While inspecting the completed vessel, you notice that some of the longitudinal seams on the main barrel section are in line with each other, ie not offset:

Please select an option and click submit.

Q 9/30

Q. 10/30: The fabricator wishes to reduce welding time and distortion on the longitudinal and circumferential welds, which of the following will best achieve this?

Please select an option and click submit.

Q 10/30

Q. 11/30: You notice at the test house that root and face bends are being conducted with a 50% reduction in the former diameter than that stated in the specification. What difference would this make to the testing conditions?

Please select an option and click submit.

Q 11/30

Q. 12/30: Continuing with the witnessing of bend testing, you notice that the excess weld metal has not been removed. Are there any consequences attached to this practice?

Please select an option and click submit.

Q 12/30

Q. 13/30: Testing has just been completed on a single sided butt weld procedure, 10mm thick, PA position using the MMA process. Which mechanical tests would you expect to find within the documentation?

Please select an option and click submit.

Q 13/30

Q. 14/30: You are checking the test report for a transverse tensile test on a 16mm butt weld with a UTS value of 460N/mm². Which of the following sets of tensile samples would fail the test?

Please select an option and click submit.

Q 14/30

Q. 15/30: Charpy impact tests have been conducted on a 16mm single V butt joint. Which of the following set of results would meet the specification?

Please select an option and click submit.

Q 15/30

Q. 16/30: A welder qualifies in C Mn steel, 10mm thick, MMA process using low hydrogen electrodes, PC position using DC- polarity. Which one of the following is the welder not qualified for?

Please select an option and click submit.

Q 16/30

Q. 17/30: A charpy impact test is devised to test samples at different temperatures. What does this hope to establish?

Please select an option and click submit.

Q 17/30

Q. 18/30: The point at which the Rm is reached in a tensile test is also referred to as the:

Please select an option and click submit.

Q 18/30

Q. 19/30: If a tensile test specimen fails to meet the required value, what action can be taken?

Please select an option and click submit.

Q 19/30

Q. 20/30: In a procedure qualification in 10m thick material welded in the PF position when impacts are not specified, which position(s) is the procedure qualified for?

Please select an option and click submit.

Q 20/30

Q. 21/30: While inspecting some cast duplex valve bodies one of your inspectors asks if the castings require a heat treatment process. Which of the following would most likely be applied to these items?

Please select an option and click submit.

Q 21/30

Q. 22/30: A set of fabricated brackets manufactured from 316L stainless steel is about to be heat-treated, which of the following applies?

Please select an option and click submit.

Q 22/30

Q. 23/30: During the post weld heat treatment of a small welded fabrication, you observe the heat treatment personnel applying heat by a heating torch. In accordance with TWI Specification do you consider this an acceptable practice?

Please select an option and click submit.

Q 23/30

Q. 24/30: Unfortunately the stress relieving of a welded fabricated steel structure hasn’t been witnessed by any of your inspectors. When you review the PWHT chart you notice only 2 thermocouples have been used. In accordance with the TWI Specification do you consi

Please select an option and click submit.

Q 24/30

Q. 25/30: It is a requirement for a quenched and tempered component to undergo post weld heat treatment, one of your inspectors asks you what is the maximum temperature required for this material. Which of the following is correct in accordance the TWI Specificatio

Please select an option and click submit.

Q 25/30

Q. 26/30: During Post Weld Heat Treatment, what sequence of events occurs to the properties of the material?

Please select an option and click submit.

Q 26/30

Q. 27/30: After a PWHT process has been carried out on some thick to thin C/Mn pipe spools (12.5mm to 25mm WT) you notice that the heating rate is recorded at 200°C/Hr. In accordance with the TWI Specification is this correct?