Cswip question 6 explores key aspects of welding and materials engineering, focusing on brittle fracture, hydrogen cracking, preheat temperature selection, and weld toughness. It assesses critical skills in handling various steels and welding conditions, essential for professionals in the field.
Carbon manganese steels
Austenitic stainless steel
Micro alloyed steel (HSLA)
Low carbon steel
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Carbon equivalent, joint design, welding process type and plate material quality
All joint over 25mm thick, hydrogen levels, welding process, carbon equivalent
Arc energy, material thickness, hydrogen scale and carbon equivalent
All of the above are considerations for the selection of a preheat temperature
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Macro
Nick break
Tensile
Charpy Vee notch
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Iron powder
Potassium silicate
Silicon
Calcium carbonate
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Elongation
Toughness
Ductility
Penetration
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A) Fully killed steel
B) Semi killed steel
C) Rimming steel
D) Balanced steel
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Tungsten
Manganese
Carbon
Molybdenum
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A) Can not be avoid
B) Usually has the highest tensile strength
C) Is usually martensitic
D) Bothe a and b
E) All of above
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Hydrogen, moisture, martensitic grain structure and heat
Hydrogen, poor weld profiles, temperatures above 200° C and a slow cooling rate
Hydrogen, a grain structure susceptible to cracking, stress and a temperature below 200°C
Hydrogen, existing weld defects, stress and grain structure susceptible to cracking
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Is high for carbon manganese steel and may require a preheat over 100°C
Is generally significant for carbon for manganese steels and is certainly not to be taken into consideration for preheat temperature
Is high for carbon manganese steels and my required a preheat temperature over 300°C as to avoid cracking
Is calculated from the heat input formula.
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Ductility
Hardness
Toughness
All of the above
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Tensile test
Charpy test
Fusion zone test
All of the above
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Normalizing
Annealing
Tempering
Stress relieving
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A) To determine the number and type of defects present
B) To determine the grain size
C) To determine the strength of the weld
D) Both a and b
E) All of the above
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A) Pounds per square inch
B) Newton per square inches
C) Joules
D) Both a and b
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Edge joint
Lap joint
Butt joint (single-V)
Tee joint (fillet welded)
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High coefficient, low thermal conductivity
High coefficient, High thermal conductivity
Low coefficient, High thermal conductivity
Low coefficient, low thermal conductivity
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An increase in travel speed
A reduction in material thickness
An increase in electrode diameter
None of above
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Narrow heat effected zone and hardness value in excess of 400HV
Broad heat effected zone and hardness value in excess of 400HV
A very tough and narrow heat affected zone
Narrow heat effected zone and low hardness values
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Mild steel
Medium stainless steel
Martensitic stainless steel
Forging steel
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Test piece taken from HAZ
Test piece taken from parent metal
Test piece taken from weld metal
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Single-V butt weld, root gap 2.5 mm (welded from on side only)
Double-V butt weld both sides, root gap 2.0 mm
Single –U butt with backing
None of the above can be used for mechanical welding
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2.16 KJ/mm
0.036 KJ/mm
216 KJ/mm
3.6 KJ/mm
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Have the welder re-qualified
Ignore them
Have area checked for possible cracking
Cut out the entire weld where the arc strikes exist
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A) A lower heat input and higher degree of grain refinement
B) A lower heat input and coarse grain structure
C) A low amount of distortion and higher degree of grain refinement
D) A higher amount of distortion and low degree of grain refinement
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A) To measure ultimate tensile strength
B) To measure the elongation of material
C) To measure the yield strength of material
D) All of the above
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Tensile test
Bend test
Charpy V notch test
All of the above
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The removal of residual stress
To aid slow cooling and reduce the carbon content
To reduce the chance of a brittle grain structure and to reduce the chance of hydrogen entrapment
Increase the ultimate tensile strength values and increase overall weldability
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It’s static test used to determine a material notch toughness in the weld region
It’s dynamic test used to determine a materials notch toughness in the weld region
It’s destructive test to give a measurement of through thickness ductility
None of the above
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Side bend
Face bend
Root bend
Longitudinal bend
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Welders
Inspector
NDT tech’s
All of the above
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After etching
After cutting and before etching
Only through 10X magnification
Both a and b
All of the above
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Welder approval
Welding procedure approval
Visual inspection of fusion welds
Visual inspection personnel
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Welding term and symbols
Covered electrodes for MMA
Filler wire
SAW flux
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PWPS
WPS
WPAR
All of the above
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Determine the welder’s ability
Check whether acceptance criteria specific to the project can be met
To show that the fabricator has good welding control
To show the welded joints meet the requirements of the specification
All of the above
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Be reduced by 50%
Be increased by a factor of two
Remain about the same
Be reduced by about 25%
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A composite joint
A transition joint
A compound joint
All of the above
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Transformer / rectifier (constant voltage)
Transformer flat characteristic
Transformer / rectifier / inverter (constant current)
All of the above
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