P a g e |1
API 577 EXAM|| ACTUAL STUDY GUIDE,
ACTUAL EXAM ALL QUESTIONS AND
CORRECT ANSWERS ALREADY GRADED A+||
LATEST AND FULLY COVERED VERSION 2024-
2025 WITH VERIFIED SOLUTIONS|| ASSURED
PASS!!!
Why is buttering the surface of run pipe prior to attaching a hot tap nozzle
recommended? - ANSWER> To prevent Lamellar tearing
What inspection technique should be used to measure the thickness of protective
non conductive surface Coatings and to measure clad thickness? - ANSWER>
Eddy Current
Why shouldn't nickel Alloys be pre-heated? - ANSWER> Because preheating is
actually harmful to Nickel Alloys because it slows down the cooling rate which
promotes hot cracking.
When performing a hot tap the use of low hydrogen electrodes prevent the risk of
what? - ANSWER> hydrogen assisted cracking
What is a common problem when welding nickel alloys? - ANSWER> sidewall
lack a fusion
The portion of the groove face within the joint root. What is this describing? -
ANSWER> Root Face
Carbon steel and low alloy Steels are subject to what in Caustic service? -
ANSWER> Stress corrosion cracking
, P a g e |2
If lamellar tearing occurs during a hot tap what is the cause? - ANSWER> Weld
shrinkage stresses
With in service welding there is the risk of high hardness and hydrogen cracking
where? - ANSWER> In the heat affected zone of the parent material
When buttering how many weld layers should be deposited? - ANSWER> 2
When buttering, both the Weld and the pipe local to the weld should be inspected
using what? - ANSWER> Crack detection and UT methods
The simplest weldability test are those that evaluate what of the weld? -
ANSWER> strength and ductility
What increases hot cracking in stainless steel? - ANSWER> Silicon and
columbium
Resistance to indentation describes what? - ANSWER> Hardness
Austentic Wells require a minimum amount of what to resist cracking? -
ANSWER> Delta ferrite
Fillet weld gauge is used to measure what? - ANSWER> Fillet weld leg length,
longevity or convexity
What are the wpq essential variable groups? - ANSWER> Joints, Base metals,
filler metals, positions, gas, electrical characteristics
, P a g e |3
What is the primary factor affecting the weldability of a base metal? - ANSWER>
The base metals chemical composition
Those which are insensitive to structure and can be measured without the
application of force. What is this describing? - ANSWER> Physical properties of
a metal or alloy
The ability of a metal to absorb energy in the form plastic Lee before fracturing.
What does this describe? - ANSWER> Toughness
What is the most common test for toughness? - ANSWER> Charpy Impact test
What is the primary purpose for preheating carbon and low alloy steels? -
ANSWER> To reduce the tendency for hydrogen induced delayed cracking
Name the reference for certification guidelines for international work. -
ANSWER> ISO 9712, EN 473
When welding with GTAW AC, when does the cleaning occur? - ANSWER>
When the electrode is positive with respect to the workpiece
What type of test is performed to determine the ductile to brittle transition
temperature? - ANSWER> Charpy
When using UT A scan what does the x-axis and y-axis represent? - ANSWER>
X axis= Time of flight, depth, back wall thickness
Y axis= Size of discontinuity
API 577 EXAM|| ACTUAL STUDY GUIDE,
ACTUAL EXAM ALL QUESTIONS AND
CORRECT ANSWERS ALREADY GRADED A+||
LATEST AND FULLY COVERED VERSION 2024-
2025 WITH VERIFIED SOLUTIONS|| ASSURED
PASS!!!
Why is buttering the surface of run pipe prior to attaching a hot tap nozzle
recommended? - ANSWER> To prevent Lamellar tearing
What inspection technique should be used to measure the thickness of protective
non conductive surface Coatings and to measure clad thickness? - ANSWER>
Eddy Current
Why shouldn't nickel Alloys be pre-heated? - ANSWER> Because preheating is
actually harmful to Nickel Alloys because it slows down the cooling rate which
promotes hot cracking.
When performing a hot tap the use of low hydrogen electrodes prevent the risk of
what? - ANSWER> hydrogen assisted cracking
What is a common problem when welding nickel alloys? - ANSWER> sidewall
lack a fusion
The portion of the groove face within the joint root. What is this describing? -
ANSWER> Root Face
Carbon steel and low alloy Steels are subject to what in Caustic service? -
ANSWER> Stress corrosion cracking
, P a g e |2
If lamellar tearing occurs during a hot tap what is the cause? - ANSWER> Weld
shrinkage stresses
With in service welding there is the risk of high hardness and hydrogen cracking
where? - ANSWER> In the heat affected zone of the parent material
When buttering how many weld layers should be deposited? - ANSWER> 2
When buttering, both the Weld and the pipe local to the weld should be inspected
using what? - ANSWER> Crack detection and UT methods
The simplest weldability test are those that evaluate what of the weld? -
ANSWER> strength and ductility
What increases hot cracking in stainless steel? - ANSWER> Silicon and
columbium
Resistance to indentation describes what? - ANSWER> Hardness
Austentic Wells require a minimum amount of what to resist cracking? -
ANSWER> Delta ferrite
Fillet weld gauge is used to measure what? - ANSWER> Fillet weld leg length,
longevity or convexity
What are the wpq essential variable groups? - ANSWER> Joints, Base metals,
filler metals, positions, gas, electrical characteristics
, P a g e |3
What is the primary factor affecting the weldability of a base metal? - ANSWER>
The base metals chemical composition
Those which are insensitive to structure and can be measured without the
application of force. What is this describing? - ANSWER> Physical properties of
a metal or alloy
The ability of a metal to absorb energy in the form plastic Lee before fracturing.
What does this describe? - ANSWER> Toughness
What is the most common test for toughness? - ANSWER> Charpy Impact test
What is the primary purpose for preheating carbon and low alloy steels? -
ANSWER> To reduce the tendency for hydrogen induced delayed cracking
Name the reference for certification guidelines for international work. -
ANSWER> ISO 9712, EN 473
When welding with GTAW AC, when does the cleaning occur? - ANSWER>
When the electrode is positive with respect to the workpiece
What type of test is performed to determine the ductile to brittle transition
temperature? - ANSWER> Charpy
When using UT A scan what does the x-axis and y-axis represent? - ANSWER>
X axis= Time of flight, depth, back wall thickness
Y axis= Size of discontinuity
