WELDER SPECIMEN WRITTEN EXAMINATION QUESTIONS
WELDER SPECIMEN WRITTEN EXAMINATION QUESTIONSWELDER EXAMINATION QUESTIONS
1 Applying preheat when welding carbon manganese steel is normally done
to avoid:
a) Slag inclusions
b) Hydrogen cracking
c) Lack of sidewall fusion
d) Porosity
2 Which of the following mechanical properties of a weld in carbon manganese
steel is most affected if the heat input per unit length of the weld is
excessively high?
a) Elongation
b) Tensile strength
c) Hardness
d) Toughness
3 You observe centerline cracking a weld that as been made one of five
workstations each making similar components. The first action to take is:
a) Impound all welding consumables
b) Report the occurrence to high authority
c) Stop all welding
d) Call for full NDT checks
4 Which of the following defects is unlikely to be found by visual
inspection?
a) Linear misalignment
b) Undercut
c) Overlap
d) Linear slag inclusion
5 Which of the following welding processes uses a resistive heating system
to achieve weld metal deposition?
a) Manual metal arc welding
b) Submerged-arc welding
c) Electro slag welding
d) Resistance spot welding
6 Which of the following units could Charpy V notch energy is measured
in?
a) Pounds per square inch
b) Joules
c) Newtons per square millimeter
d) None of the above
7 The usual method of assessing the sensitivity of radiograph is by means of
a:
a) Dosimeter
b) Fluoroscope
c) IQI ( Penetrameter)
d) Clinometer
8 Under normal contract conditions, weld procedure approval tests for pipe
work are:
a) Mandatory
b) Depend upon site and weather conditions
c) Dependent upon the contractor’s confidence in his procedures
d) Only required when CO2 welding is to be used.
9 Which of the following destructive tests is not normally required for
welder approval test for mild steel?
a) Bend test
b) Macro examination
c) Impact tests
d) Fracture tests
10 Hydrogen controlled electrodes were developed principally for:
a) The prevention of porosity
b) The prevention of cracking
c) The enhancement of arc voltage
d) Their ease of arc starting
11 For which of the following is pre-heating most likely to be required?
a) Austenitic stainless steels
b) High strength alloy steels
c) Low and medium strength steels
d) Low carbon steels
12 Manual metal arc welding of low alloy steels is more likely to be
performed with:
a) Rutile electrodes
b) Cellulosic Electrodes
c) Iron powder electrodes
d) Basic hydrogen controlled electrodes
13 which of the following defects is more common to weld deposited by the
CO-2 welding process than weld deposited by manual metal arc?
a) Slag inclusion
b) Excess penetration
c) Lack of side fusion
d) Tungsten inclusions
14 Which defect would you expect to obtain in TIG welds in non-deoxidized
steel?
a) Under cut
b) Porosity
c) Tungsten inclusions
d) Linear misalignment
15 Which of the following can arise from copper inclusions is a ferrite steel
weld?
a) Weld metal cracks
b) HAZ cracks
c) Lamellar tearing
d) Porosity
16 Which of the following is likely to give the highest impact strength in
ferritic weld metal?
a) Cellulosic electrodes
b) Submerged arc with acid flux
c) Spray transfer Co-2-welding
d) Basic coated normal metal arc electrodes
17 Which of the following methods of NDT would be most likely to detect
lack of side fusion in ferritic steel welds?
a) Penetrants
b) Magnetic particles
c) Radiography
d) Ultrasonic flaw detector
18 You suspected that ferritic steel plates, which have been edge, prepared
contain crack in the prepared edges. Which NDT method would you use to
check this?
a) Radiography
b) Magnetic particle
c) Penetrants
d) Ultrasonic flaw detector
19 Which of the following defects do you not expect to find by visual
examination of completed welds?
a) Linear slag inclusions
b) Under cuts
c) Overlap
d) Linear misalignment
20 Stress relief is not helpful in one of the following cases. Which one?
a) In improving resistance to stress corrosion cracking
b) In dimensional stability after machining improving
c) In lowering the peak residual stress
d) In softening the steel
21 What is the maximum hardness usually recommended for the HAZ of a
medium strength ferritic steel weld?
a) 100 DP Hv
b) 350 DP HV
c) 500 DP Hv
d) 750 DP Hv
22 What effect to midthickess lamination in steel plate normally has when
they are located within a weld HAZ?
a) Cause lamellar tearing
b) Fuse together to form a bond
c) Affect the weld metal composition
d) Cause internal tearing on a micro-scale
23 When hydrogen control is specified for a manual metal arc-welding
project the electrode would normally be:
a) Cellulosic
b) Iron oxide
c) Acid
d) Basic
24 You would with certainty recognize a hydrogen controlled flux covered
electrode from it’s:
a) Color
b) Length
c) Trade name
d) AWS/BS639 Code Letter
25 When manual metal arc welding is being carried out on an open
construction site, which groups of welder are most likely to require
continuous monitoring?
a) Concrete shuttering welding team
b) Pipe welders
c) Platter welders
d) Plant maintenance welders
26 You noticed manual metal arc welding electrodes, stripe of flux, are being
used as filler wire, for TIG welding. You would object because:
a) It is too expensive
b) The wire would be too thick
c) The weld metal composition may be wrong
d) The wire is too short
27 When open site working, serious porosity in manual metal arc welding is
brought to your attention. What would you investigate?
a) Electrode type
b) Power plant type
c) Electrode storage
d) Day temperature
28 The steel composition in structural contract is changed form 0.15%
carbon, 0.6% manganese, to 0.2% carbon, 1.2% manganese. Might this
influence the incidence of:
a) Porosity
b) Cracking in the weld area
c) Under cut for fillet welds
d) Lack of root fusion defects
29 One of the following alloys is non-magnetic, Which?
a) 4.0% Chromium molybdenum
b) 12.0% Chromium
c) Austenitic Stainless Steel
d) 9.0% Nickel Steel
30 When the TIG welding Austenitic Stainless Steel pipe. Argon gas backing
is called for. This is to:
a) Prevent oxidation
b) Prevent under bead cracking
c) Prevent porosity
d) Control the penetration bead shape
31 Pre-heating a carbon steel manual metal arc welding is carried out to
minimize the risk of
a) Scattered porosity
b) Worm hole porosity
c) Parent metal cracking
d) Lack of penetration
32 IN UK practice, BS 499 Part2 specifies that the drawing dimension quoted
for a fillet weld is the:
a) Leg length
b) Actual throat thickness
c) Weld width
33 For open site manual metal arc welding the following equipment is
available. Which would you choose for safe working?
a) Single operator transformer
b) Multi operator transformers
c) AC/DC composite power unit
d) Diesel engine driven motor generator
34 If submerged welding to be used to make butt welds, which would you be
most critical of:
a) The root gap tolerance
b) The angle of penetration
c) The root face width
d) The gas cut finish
35 During CO-2 welding, the arc length is most likely to be affected by:
a) The wire diameter
b) The current return connections
c) The gas flow rate
d) The torch to work angle
36 Pre heating for arc welding applies to:
a) Assembly welding only
b) Assembly and tack welding
c) Joint over 25 mm thick only
d) Cruciform welds only
36 You see a welder using oxy-acetylene flame with along feathered inner
cone. What would be the effect of this on carbon steel?
a) The weld could be hard and brittle
b) The weld metal could be too soft
c) There will be no effect on the weld
d) The weld have under cut
37 A welder qualification test is o verify:
a) The skill of the welder
b) The quality of the materials
c) The non-destructive procedures
d) The manufacturing methods
38 A fabricating procedure calls for fillet welds to be blended in by grinding.
This is to influence:
a) HAZ cracking
b) Fatigue life
c) Residual stresses
d) Yield strength
39 Bend test specimens have been taken from a 25 mm thick carbon steel butt
weld. Which would show lack of inter-run fusion:
a) Side bend
b) Root bend
c) Face bend