CSWIP 3.

1 Homework : Leading Multiple Choice Questions

Paper 1

Name: ……………………………….…………………………. Date: ……………………

1 Which is the best destructive test for showing lack of sidewall fusion in a 25mm
thickness butt weld?

a Nick break.
b Side bend.
c Charpy impact.
d Face bend test.

1a With reference to the previous question and the correct answer, what type of test is
this?

a Qualitative
b Tentative
c Quantitative
d Sensitive

2 Which of the following would be cause for rejection by most fabrication standards
when inspecting fillet welds with undercut, a small amount of?

a Depth.
b Length.
c Width.
d Sharpness.

2a With reference to the previous question, what would be the most likely cause of
undercut?

a High inductance
b High wire feed speed
c Low inductance
d Low voltage

3 The European Standard for NDE of fusion welds by visual examination is:

a EN 15614.
b EN 2560.
c EN 9606.
d EN 17637.
3a With reference to the previous question, two of the standards are closely linked to
each other, which are they?

a a and b
b b and c
c a and c
d a and d

4 When visually inspecting the face of a finished weld which of the following flaws would
be considered the most serious:

a Excess weld metal height.

b Start porosity.
c Spatter.
d Arc strike.

4a With reference to the previous question and the correct answer, why is it considered
so?

a It looks bad
b It’s a hard spot
c Its lack of fusion
d It’s a volumetric defect

5 Which of the following is a planar imperfection?

a Lack of sidewall fusion.

b Slag inclusion.
c Linear porosity.
d Root concavity.

5a With reference to the previous question and the correct answer, how could this defect
be caused?

a Amperage to high
b Voltage too high
c Amperage too low
d Gas flow rate too low

6 A fillet weld has an actual throat thickness of 8mm and a leg length of 7mm, what is
the excess weld metal?

a 2.1mm.
b 1.8mm.
c 3.1mm.
d 1.4mm.
6a With reference to the previous question and the correct answer, if this excess weld
metal was removed the fillet would be a?

a Concave fillet weld

b Convex fillet weld
c Mitre
d Undersized fillet weld

7 BS EN 17637 allows the use of a magnifying glass for visual inspection, but
recommends that the magnification is:

a X 2.
b X 2 to x5.
c X 5 to x10.
d Not greater than x20.

7a With reference to the previous question, what likely defect will this help to find?

a Excess weld metal height

b Undercut
c Internal lack of fusion
d Root concavity

8 A WPS may specify a maximum width for individual weld beads (weave width) when
welding CMn steels. If the width is exceeded it may cause:

a Lack of inter-run fusion.

b A reduction in HAZ toughness.
c Lack of sidewall fusion.
d Too low a deposition rate.

8a With reference to the previous question and the correct answer, in what welding
position is this most likely to happen?

a PA
b PB
c PF
d PG

9 In TIG welding a current slope-out device reduces:

a Tungsten spatter.
b Risk of crater cracking.
c Risk of arc strikes.
d Interpass temperature.

9a With reference to the previous question and the correct answer, what other device is
working at the same time?

a Gas flow
b Slope up device
c High frequency
d Pre purge
10 Pipe bores of some materials must be purged with argon before and during TIG
welding to:

a Prevent linear porosity.

b Prevent burn-through.
c Prevent oxidation of the root bead.
d Eliminate moisture pick-up in the root bead.

10a With reference to the previous question and the correct answer, what material would
this pipe be?

a All materials
b Aluminium and stainless steel
c Stainless steel
d Carbon steel and stainless steel

11 According to AWS 2.4 a weld symbol for the other side is placed:

a Above the dashed line.

b Below the dashed line.
c Above the solid line.
d Below the solid line.

11a With reference to the previous question, when is the dashed line removed?

a When the welds are symmetrical

b There is no dashed line
c When it’s a butt weld
d When the fillet welds are different sizes

12 Which of the following elements is added to steel to give resistance to creep at

elevated service temperatures?

a Nickel.
b Manganese.
c Molybdenum.
d Aluminium.

12a With reference to the previous question, what is creep?

a It’s a form of sensitization

b It’s a form of deformation
c It’s a rupture
d It’s a type of corrosion

13 Compound fillet welds:

a Always contain full penetration butt welds.

b Joints which always have combinations of welds made by different welding
processes.
c Combinations between two different weld types.
d All of the above.
13a With reference to the previous question and the correct answer, what would be the
typical bevel angle for a compound fillet weld?

a 5° degrees
b 120° degrees
c 180° degrees
d 50° degrees

14 Welding inspectors:

a Normally supervise welders.

b Are normally requested to write welding procedures.
c Are sometimes requested to qualify welders.
d All of the above.

14a With reference to the previous question, what standard would be used?

a ASME 8
b EN 2650
c EN 9606
d EN 15614

15 In an arc welding process, which of the following is the correct term used for the
amount of weld metal deposited per hour?

a Filling rate.
b Deposition rate.
c Weld deposition.
d Weld duty cycle.

15a With reference to the previous question and the correct answer, how is this measured?

a Kg per mm
b Kg per hour
c A percentage of 10 minutes
d Millilitres per 100 grms of weld

16 The design throat thickness of 19mm leg length fillet weld is?

a 27.5mm.
b 24mm.
c 13.3mm.
d 12.5mm.

16a With reference to the previous question and the correct answer, what type of profile
would this weld have?

a Concave
b Convex
c Mitre
d Excessive build up
17 Pre-heat for steel will need increasing if:

a The material thickness reduces.

b Faster welding speeds are used.
c The use of a larger welding electrode.
d A reduction in carbon content in the parent material.

17a With reference to the previous question, which of the following has changed?

a Heat input
b Amperage
c Voltage
d Deposition rate

18 What is the maximum allowable linear misalignment for 8mm material if the code
states the following, ‘Linear misalignment is permissible if the maximum dimension
does not exceed 10% of t up to a maximum of 2mm’?

a 0.8mm.
b 2mm.
c 8mm.
d None of the above, insufficient information provided.

18a With reference to the previous question, which of the following Linear misalignments
would not be allowed?

a 10mm thick misalignment 1 mm

b 20mm thick misalignment 2mm
c 15mm thick misalignment 1.6mm
d 30mm thick misalignment 2mm

19 ISO 17637:

a The minimum light illumination required for visual inspection is 350 Lux.
b The minimum light illumination required for visual inspection is 500 Lux.
c The minimum light illumination required for visual inspection is 600 Lux at not
less than 30°.
d Doesn’t specify any viewing conditions for visual inspection.

19a With reference to the previous question, what else does ISO 17637 state about visual
inspection?

a Minimum distance 60mm and magnification up to 10 times

b Maximum distance 600mm and magnification between 10 and 20 times
c Maximum distance 600mm and magnification between 2 and 5 times
d Minimum distance 60mm and magnification between 2 and 15 times
20 Which of the following electrodes and current types may be used for the TIG welding
of aluminium and its alloys?

a Cerium electrode, DC –ve.

b Zirconium electrode, AC.
c Thorium electrode, DC +ve.
d All of the above may be used.

20a With reference to the previous question and the correct answer, what type of arc
condition is created?

a Deep penetration
b Cathodic cleaning
c Pulsing condition
d Purging condition

21 When considering the MIG/MAG welding process which of the following metal transfer
modes would be the most suited to the welding of thick plates over 25mm in PA.

a Dip transfer.
b Pulse transfer.
c Spray transfer.
d Globular transfer.

21a With reference to the previous question and the correct answer, what would be the
typical parameters for this type of metal transfer mode?

a 21 volts 200 amps

b 22 volts 210 amps
c 24 volts 220 amps
d 26 volts 230 amps

22 When considering hydrogen, which of the following welding processes would produce
the lowest levels in the completed weld? (under controlled conditions)

a MMA.
b SAW.
c TIG.
d FCAW.

22a With reference to the previous question, what actual levels of hydrogen are produced
for a given weld process?

a 3 ml of hydrogen per 100 grams of weld metal, TIG

b 5 ml of hydrogen per 100 grams of weld metal, TIG
c 8 ml of hydrogen per 100 grams of weld metal, TIG
d 10 ml of hydrogen per 100 grams of weld metal TIG
23 In steel the element with the greatest effect on hardness is:

a Chromium.
b Manganese.
c Carbon.
d Nickel.

23a With reference to the previous question, which of those elements listed would help in
preventing solidification cracking?

a Carbon
b Nickel
c Chromium
d Manganese

24 What could cause a Brittle fracture?

a The susceptibility in steels will increase with the formation of a fine grain
structure.
b The susceptibility in steels will increase with a reduction in the in-service
temperature to sub-zero conditions.
c The susceptibility in steels will increase with a slow cooling rate.
d All of the above.

24a With reference to the previous question, what type of test could predict this type of
failure?

a All weld metal tensile test

b Charpy test
c Ultrasonic test
d Radiography

25 Which of the following steels is considered non-magnetic?

a 18%Cr, 8%Ni.
b 2.25Cr 1Mo.
c 9%Cr,1Mo.
d 9%Ni.

25a With reference to the previous question and the correct answer, which one of the
materials listed is Austenitic?

a 9%Ni
b 2.25Cr, 1Mo
c 316L
d S355

26. A brittle fracture has what type of features :

a There is a reduction in cross-section at the position of fracture.

b The fracture surface is flat and featureless but has a rough surface.
c Smooth surface, beach marks and shear lips.
d The fracture face shows beach marks and shear lips.
26a With reference to the previous question and the correct answer, which of the following
would mainly contribute to the condition?

a Corrosive environment
b Temperature
c Conductivity rate
d Young’s modulus

27 A STRA test is used to measure the:

a Tensile strength of the welded joint.

b Level of residual stress in butt joints.
c Fracture toughness of the HAZ.
d Through-thickness ductility of a steel plate (the Z direction).

27a With reference to the previous question and the correct answer, why is this test
carried out?

a To assess susceptibility to fatigue failure

b To access susceptibility to brittle fracture
c To access susceptibility to lamellar tearing
d To access susceptibility to solidification cracking

28 A macro section is particularly good for showing:

a The weld metal HAZ microstructure.

b Overlap.
c Joint hardness.
d Spatter.

28a With reference to the previous question and the correct answer, how could this occur?

a Incorrect torch angle

b Gas flow rate too low
c CTWD too close
d Pre heat too high

29 A suitable gas/gas mixture for GMAW of aluminium is:

a 100%CO2.
b 100% Argon.
c 80% argon + 20% CO2.
d 98% argon + 2% O2.

29a With reference to the previous question, which of the gas mixtures listed would be
used for welding stainless steel?

a 100% Argon
b 98% Argon + 2% 0₂
c 80% Argon + 20% c0₂
d 100% c0₂
30 A crack running along the centreline of a weld bead could be caused by:

a Use of damp flux.

b Lack of preheat.
c Arc voltage too high.
d Weld bead too deep and very narrow.

30a With reference to the previous question and the correct answer, what is this failure
commonly known as?

a Underbead cracking
b Solidification cracking
c Toe cracking
d Hydrogen cracking