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QC Welding Test 15:
Q. 1/30: What would be the main effect produced by increasing the kV in radiography
An increase in sensityvity
An increase in definition
A reduction in density
A reduction in contrast
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Q 1/30
Test Progress : 3.33%
Q. 2/30: When considering lamllar tearing, what is a buttering
A weld run used to increase the size of th throat thickness of the fillet weld
A weld run which may be used to take up contraction stress
A weld run used to increase the UTS value of the parent material
A weld run used to ensure full penetration of the fillet weld
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Q 2/30
Test Progress : 6.67%
Q. 3/30: What is the electrode quiver temperature?
65 Celsius
110 Celsius
270 Celsius
380 Celsius
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Q 3/30
Test Progress : 10.00%
Q. 4/30: What factors are necessary for stress corrosion cracking to occure
An aggressive corrosive environment, a carbon content above 0.03% and residual stress
An aggressive corrosive environment, tensile stress and material susceptible to cracking
A temprature above 0.5 of it's melting point,tensile stress and corrosive environment
Poor through thickness ductility, a corrosive environment and a temprature of 0.5 of the materials melting point
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Q 4/30
Test Progress : 13.33%
Q. 5/30: In plant piping mostly effected defects are?
Internal defect
Surface
Sub surface
All of the above
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Q 5/30
Test Progress : 16.67%
Q. 6/30: Which of the following constituents are added to electrode fluxes to aid arc stability
Aluminium oxide, manganese and silicon
Calciumcarbonate, potassium silicate and titanium oxide
Thorium,cerium oxide and carbon dioxide
Aluminium oxide, silicon and manganese
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Q 6/30
Test Progress : 20.00%
Q. 7/30: Inn MMA welding what parameter is used for the controle of penetration into the base material
Voltage
Welding speed
Iron powder in the coating
Current
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Q 7/30
Test Progress : 23.33%
Q. 8/30: In the welding of a butt joint made from one side , which of the following controls the profile of the root bead
Root face
Bevel angle
Root gap
None of the above
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Q 8/30
Test Progress : 26.67%
Q. 9/30: What type of power source charectristic is required for manual welding
Constant voltage
Flat charectristic
Drooping charesterstic
Motor genarator
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Q 9/30
Test Progress : 30.00%
Q. 10/30: Degreasing components are essential for quality welding but some agents may
Cause corrosion problems
Give off phosgens gas
Leave residues
All of the above
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Q 10/30
Test Progress : 33.33%
Q. 11/30: Which of the following chemical elements has the greater effect on the hardenability of a steel plate
Molybdenum
Chromium
Titanium
Carbon
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Q 11/30
Test Progress : 36.67%
Q. 12/30: Welding procedure qualification code for structural welding ?
AWS D1.1
API 1104
ASME B 31.3
AWS D1.2
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Q 12/30
Test Progress : 40.00%
Q. 13/30: In x-ray work the quality of the radiographic negative is assessed by the
Density of the film
IQI indicator
KVA available
Stand off distance
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Q 13/30
Test Progress : 43.33%
Q. 14/30: A steel described as QT will have improved tensile properties because it has
Had control of chemical composition
Been heat treated
Been quality tested
Been vacuum melted
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Q 14/30
Test Progress : 46.67%
Q. 15/30: In the welding of austinitic stainless steels, the electrode and the plate material can be purchased with low carbon contents. The reason for this is to
Cracking in the HAZ
The formation of chromium carbides
Cracking in the weld metal
Distortion
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Q 15/30
Test Progress : 50.00%
Q. 16/30: What is the primary element for weld symbols ?
• Arrow line
• Reference line
• Dashed line
• Tail
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Q 16/30
Test Progress : 53.33%
Q. 17/30: In a steel which has improved creep properties at elevated temprature, which one of the following elements helps in this improvement
Tungston inclusion
Manganese
Molybdenum
Carbon
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Q 17/30
Test Progress : 56.67%
Q. 18/30: Welding a steel plate of a CE of 0.45 would require preheating to
Prevent the formation of sulphides
Prevent hardening in the HAZ
Prevent the formation of carbides
To improve mechanical properties in the weld
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Q 18/30
Test Progress : 60.00%
Q. 19/30: Welding procedures may require welds to be deposited at a controlled rate heat input .High heat in puts would
Have poor profile
Have larger grain size
Have high hardness in the HAZ
Have low elongation properties
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Q 19/30
Test Progress : 63.33%
Q. 20/30: In a tensile test , a brittle material would be indicated if the fracture surface
Show a reduction in size
Is flat and featureless
Breakes in the weld metal
breaks in the parent material
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Q 20/30
Test Progress : 66.67%
Q. 21/30: What destructive test would be required to ascertain the liklihood of cracking in the HAZ of a weld
Nick break
Side bend test
Charpy impact
Macro test
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Q 21/30
Test Progress : 70.00%
Q. 22/30: Which type of submerged arc welding flux is more resistant to moisture
Fused
Agglomerated
Basic
All of the above
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Q 22/30
Test Progress : 73.33%
Q. 23/30: Which NDT method is for detectable in surface defect ?
MT
PT
RT
UT
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Q 23/30
Test Progress : 76.67%
Q. 24/30: Preheating for arc welding applies to
Assembly welding only
Assembly and tack welding
Joints over 25 mm thick only
Cruciform welds only
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Q 24/30
Test Progress : 80.00%
Q. 25/30: Submerged arc welding is used to make butt welds which is the most critical parameter with respect to the weld preparation
Root gap
Angle
Root face
Gas cut finish
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Q 25/30
Test Progress : 83.33%
Q. 26/30: The presence of iron sulphide in weld metal is associated with
A solidification cracking
Hydrogen cracking
Intergranular corrosion
Stress corrosion
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Q 26/30
Test Progress : 86.67%
Q. 27/30: A metallurgical problem most associated with arc welding is
Hydrogen cracking in the heat affected zone
Solidification cracks in weldmetal
Hydrogen cracking in the weld metal
Lamellar tearing in the weld metal
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Q 27/30
Test Progress : 90.00%
Q. 28/30: In submerged arc welding, excessive arc voltage may cause
Excessive penetration
Change in weld metal composition
Narrow weld width
Excessive weld bead height
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Q 28/30
Test Progress : 93.33%
Q. 29/30: A large grain structure in steels is said to produce
Low ductility value
Low fracure toughness value
High fracure toughness value
High tensile strength
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Q 29/30
Test Progress : 96.67%
Q. 30/30: The liklehood of brittle fracture in steel increase with
A large grain formation
A reduction of in service temparature to sub zero levels
Ferritic rather than austenitic steel
All of the above
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Q 30/30
Test Progress : 100.00%
Q. 31/30: Lamellar tearing has occurred in a steel fabrication before welding could it have been found by
X-ray examination
Dye penetrant test
Ultrsonic inspection
It would not have been found by any inspection method
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Q 31/30
Test Progress : 103.33%
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