TECHNOLOGY EXAMINATION QUESTIONS (MULTI-COHICE EXAM 2)
Answers to be indicated on Candidate Answer Sheet under the heading of Technology Candidates must not mark this sheet; failure to
follow these instructions could lead to this part of the examination being void.
Duties Before Welding
1.
Who should have access to the WPS?
a) NDT operators
2.
3.
b) Inspectors only
c) Welders only
d) Welders and inspectors
How do we determine what the correct weld preparation (root gap, root face, included angle) should
a) By consulting the WPSs
b) The fabrication drawing will give all the information
c) The welder will decide
d) The inspector will recommend what is suitable
How are the lengths of tack welds during assembly and fit up determined?
a) By the welders as they have extensive knowledge
b) The fabrication specification will give minimum tack length requirements
c) The fabrication drawing will give all the information
d) Any length of tack weld will do for assembly
4.
5.
6.
7.
Is it always necessary to preheat the base metal before welding?
a) Not on a sunny day
b) Only in accordance with the WPS
c) If the equipment is available it must be used
d) If using cellulosic rods these will provide enough heat
Which of the following would not be required to be checked before welding?
a) The welding consumables
b) The weld root gap
c) PWHT temperature range
d) The weld preparation
What does the term WPS means?
a) Weld productivity specification
b) Weld production scheme
c) Welding procedure specification
d) Weld productivity standard
What standard is used for the basic requirements of visual inspection?
a) BS EN 970
8.
b) API 1104
c) BS EN 7079
d) BS EN 4515
c) An approved safety engineer
d) Everyone
Who is responsible for site safety?
a) Site Quality Engineer
b) Welding Supervisor
Duties During Welding
9.
It is permissible to allow trainee welder to carry out production welding?
a) Never
b) Yes as long as the supervisor is happy with his workmanship standard
c) Yes as long as he has the approved qualification to cover the intended scope of work
d) Yes as long as no NDT is required on the finished weld
10.
11.
Who has the responsibility of ensuring the welder is using the correct polarity during welding?
a) The welder and the welding inspector
b) Store man and the welder
c) Welding Engineer
d) The Q/A department
When would you measure the minimum preheat temperature?
a) On completion of each pass
b) Immediately prior to commencing the first pass and subsequent passes
c) When the welding is complete
d) Minimum preheat temperature measurement is only required if the heat input is lower than that specified in WPS
Technology Examination (Multi Choice Paper 2)
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12.
13.
14.
During root welding, which of the following would be the main cause of excess penetration?
a) The root gap is too small in accordance with WPS
b) Preheat not used
c) The current is too high
d) Root face is too large
The welder have increased the voltage on the SAW welding set, what would be the effect on the weld appearance?
a) No effect
b) The weld width would be narrower
c) The penetration will be increased
d) The weld width would be wider
What course of action should be taken upon finding a welder using incorrect shielding gas?
a) Allow welding to proceed if the workman ship is good
b) Report the incident and record all relevant information
c) None if the tensile strength of the consumables is the same as the approved one
d) Change the electrode for the correct type and continue welding
15.
What is the maximum OCV allowed to initiate an arc when using A. C current?
a) 1000V
16.
b) 10V
c) 90V
d) 900V
Why is the OCV capped at voltage setting?
a) To save electricity
b) To prevent exploding of the consumable
c) Allow smooth transition into welding voltage range
d) To reduce the risk of fatality
Duties After Welding
17.
18.
19.
20.
21.
22.
What information should be recorded as a minimum, on a completed production weld?
a) Size and type of electrode used
b) Welding supervisor’s name
c) Welder’s Identification, date and weld number
d) Welding inspector name
What is meant by the term PWHT?
a) Pipe weld heat treatment
b) Pre weld heat treatment
c) Post weld hydrogen tearing
d) Post weld het treatment
Why would visual inspection of the excess weld metal at the bottom of a cross country pipeline be important?
a) It is the most difficult area to weld
b) It is the dirtiest part of the pipe as it is near the ground
c) Welders always forget to weld the bottom
d) It is the most difficult area to radiograph
Who has the final responsibility of sentencing and accepting a weld on completion?
a) The contractor’s inspector
b) Site manager
c) The welder
d) The client’s inspector or certifying authority
Why is it essential to clean the excess weld metal on completion of the production weld?
a) So it can be ready for painting
b) To remove any rust
c) To ensure it is suitably clean for visual inspection and NDT
d) To remove slag from the undercut
To assess the surface of a weld for direct inspection, the distance from the surface to eye should be a
maximum of?
a) 200mm
23.
c) 60mm
d) 6000mm
What is the recommended minimum range of illumination required by BS EN 970 for inspection of a welded
surface?
a) 90 to 125 lux
24.
b) 600mm
b) 150 to 250 lux
c) 350 to 500 lux
d) 35 to 50 lux
W h o s h o ul d s e l e c t th e s p ec i fi c w e l d s fo r NDT, to co ver th e 10% co n tr actu al p er cen tag e r eq u i r ed b y
th e specification/Code?
a) Anyone can select the welds as its just a random choice
b) The welder as he knows which welds are likely to produce the least defects
c) This will be referenced in the inspection and test plan
d) Nobody, as welding is always carried out to a high standard the use of percentage NDT is of no real value
Technology Examination (Multi Choice Paper 2)
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Mechanical Testing
25.
In a welding procedure transverse joint tensile test the following observations were made. The
specimen CS A was recorded as 25mm x 12mm and the maximum load applied was recorded as
150kN. What is the UTS?
a) 50kN/mm 2
26.
b) 5500N/mm 2
c) 500N/mm 2
d) 50N/mm 2
In a transverse weld tensile test, if the break was in the weld metal, the sample would he:
a) Rejected
b) Retested
c) Acceptable if the UTS is equal to or greater than the specified UTS of the plate
d) Acceptable if the UTS is between 80-90% of the specified UTS of the plate
27.
In a n a l l w e l d t e n s i l e t e s t , t h e o r i g i n a l s p e c i m e n g a u g e l e n g t h w a s 5 0 m m , a n d a f t e r t h e t e s t t h e
increased gauge length was 60mm, what is the elongation percentage?
a) % A is 50
28.
b) % A is 20
c) % A is 29
d) % A is 36
Some c o d e s r e q u i r e t h e e x c e s s w e l d m e t a l ( w e l d c a p ) o n c r o s s w e l d j o i n t ` t e n s i l e s p e c i m e n s t o b e
flush, this is because:
a) Flushed caps will always break in the weld metal area
b) This is to remove any porosity in the excess weld metal (weld cap)
c) It is easier to calculate the cross sectional area of the joint when fl ushed
d) Flushed caps have fewer stress raisers and therefore give a more accurate result
29.
30.
31.
In welder qualification testing of 20mm plates, why are side bends used instead of root and face
bends?
a) They are easier to produce
b) The testing equipment cannot handle thick root/face bends
c) Root defects are not important for welder qualification
d) They give more accurate indications
Mechanical tests are divided in to two areas, identify these from the list below:
a) Destructive and non destructive tests
b) Qualitative and quantitative
c) Visual and mechanical
d) Qualitative and visual
When examining a completed bend test, the angle of the bend was found to be 175°. The testing specification
calls for the sample to have been formed through 180°?
a) The bends should be considered as failed
b) They should be bent to 180° then re-examined
c) They should be acceptable as the reduction in angle is due to material spring back
d) They should be rejected as the angle is not close enough to be acceptable
32.
Charpy testing is carried out on a welding procedure test plate because?
a) It gives an indication of the through thickness ductility (in the Z direction).
b) The impact test results can be used to verify that the material has not been adversely affected by the heat of the welding
c) It give an indication of the materials elongation properties
d) It gives a quick indication of the weld quality for welder qualification tests.
33.
Charpy impact tests showing a flat but rough surface after the completed test, this would indicate which type of
failure?
a) Fatigue
b) Ductile
c) Fatigue to ductile
d) Brittle
Technology Examination (Multi Choice Paper 2)
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Processes
34.
A butt weld has been made by MMA in a 50mm thick impact tested steel plate. The welding electrode used was a
basic type, 5mm diameter. The measured welding parameters for one of the runs was 220 amps, 21 volts, using
DC+ve polarity, and a ROL:of 270mm per min. What would be the arc energy?
a) Insufficient information given to calculate the arc energy
b) 1.54kJ/mm
c) 1.026kJ/mm
d) 2.82kJ/mm
35.
When using DC+ve polarity, what is the typical OCV?
a) 20V
b) 50V
c) 90V
d) 240V
36.
When MMA welding what will be the effect on the weld f the power source was changed from DC+ve to AC?
a) None
b) It would have been easier for the welder to strike the arc
c) It would slightly increase the depth of penetration
d) It would slightly decrease the depth of penetration
37.
What would the effect be if the polarity were changed from DC+ve to DC-ve?
a) None
b) Greater deposition rate
c) Greater penetration
d) Less deposition rate
Technology Examination (Multi Choice Paper 2)
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