API-570 Closed Book: Questions With Solutions
The first 2 digits on a SMAW electrode represents the:
A. characteristics of flux covering the electrode.
B. electrode manufacturer's ID.
C. welding positions the rod can be used.
D. tensile strength of the rod. Right Ans - D. tensile strength of the rod.
What inspection tool can be used to measure the weld prep angle?
A. Bridge Cam gauge
B. Der Bleistift gauge
C. Hi-Lo gauge
D. Newman gauge
E. Skew gauge Right Ans - A. Bridge Cam gauge
A carbon steel vessel in caustic service has a temperature excursion up to 425
°F. No PWHT has been performed. What type of deterioration could be
expected?
A. Intergranular corrosion
B. Stress corrosion cracking
C. Galvanic corrosion
D. High temperature embrittlement Right Ans - B. Stress corrosion cracking
Which of the following is not an acceptable method for establishing the piping
corrosion rate
in a new service?
A. Owner's experience
B. Inspect the piping system within 3 months of operation
C. Corrosion data from trade journal
D. Corrosion data from phone discussion with a consultant corrosion engineer
Right Ans - D. Corrosion data from phone discussion with a consultant
corrosion engineer
Which of the following can cause a pressure relief valve to chatter? This may
have more than
one correct answer, please select all answers that apply.
A. Lengthy pipe to relief device inlet
,B. Oversized relief outlet piping
C. Obstructions in the inlet piping
D. Significantly under-sized relief device
E. Significantly over-sized relief device Right Ans -
For welded pipe, the normal thickness under-tolerance is:
A. -0.00 inch.
B. -0.01 inch.
C. -0.0125 inch.
D. -12.5% of the specified wall thickness. Right Ans - B. -0.01 inch.
When qualifying a weld procedure, the essential variables must:
A. be recorded on only the PQR.
B. be recorded on only the WPS.
C. be recorded on both the WPS and PQR.
D. be recorded on both the WPS and WPQ. Right Ans - C. be recorded on
both the WPS and PQR.
What is the minimum# of RT exposures needed to RT a 2 NPS weld? (No
access to inside)
A. 1
B. 2
C. 3
D. 4 Right Ans - B. 2
When performing preheat to a 0.500" thick pipe, the preheat zone must
extend:
A. 1" beyond the start of the weld.
B. 3" all directions from the start of the weld.
C. 6" all directions from the start of the weld.
D. 12" all directions from the start of the weld. Right Ans - B. 3" all
directions from the start of the weld.
A propane piping pipe in the tank farm area should be classified as:
A. Class 1.
B. Class 2.
C. Class 3.
D. Category D Right Ans - A. Class 1.
, According to ASME B16.5 flanges made from plate materials can only be used
for:
A. blind flanges.
B. Class 150 flanges.
C. Class 150 and 300 flanges.
D. threaded flanges. Right Ans - A. blind flanges.
The corrosiveness of soils can be determined by measuring the soil's:
A. plasticity.
B. resistivity.
C. modulus of elasticity.
D. galvanic potential. Right Ans - B. resistivity.
The flash point of a hydrocarbon is the temperature at which:
A. vapors are first emitted.
B. enough vapors are emitted to support combustion.
C. boiling occurs.
D. auto-ignition occurs. Right Ans - B. enough vapors are emitted to
support combustion.
Which of the following is a required marking on ASME B16.5 flanges?
A. Bolt material
B. Nominal pipe size
C. Outside diameter of flange
D. Temperature rating Right Ans - B. Nominal pipe size
During welding, non-essential variables:
A. must be recorded only on the WPS and must be followed by the welder.
B. must be recorded on the WPS and are optional for the welder.
C. must be recorded on both the WPS and PQR.
D. are optional on both the WPS and PQR. Right Ans - A. must be recorded
only on the WPS and must be followed by the welder.
MIC occurring in 300-series stainless steel usually forms :
A. cup-shaped pits.
B. cone-shaped pits.
C. sub-surface cavities.
D. uniform wall loss. Right Ans - C. sub-surface cavities.
The first 2 digits on a SMAW electrode represents the:
A. characteristics of flux covering the electrode.
B. electrode manufacturer's ID.
C. welding positions the rod can be used.
D. tensile strength of the rod. Right Ans - D. tensile strength of the rod.
What inspection tool can be used to measure the weld prep angle?
A. Bridge Cam gauge
B. Der Bleistift gauge
C. Hi-Lo gauge
D. Newman gauge
E. Skew gauge Right Ans - A. Bridge Cam gauge
A carbon steel vessel in caustic service has a temperature excursion up to 425
°F. No PWHT has been performed. What type of deterioration could be
expected?
A. Intergranular corrosion
B. Stress corrosion cracking
C. Galvanic corrosion
D. High temperature embrittlement Right Ans - B. Stress corrosion cracking
Which of the following is not an acceptable method for establishing the piping
corrosion rate
in a new service?
A. Owner's experience
B. Inspect the piping system within 3 months of operation
C. Corrosion data from trade journal
D. Corrosion data from phone discussion with a consultant corrosion engineer
Right Ans - D. Corrosion data from phone discussion with a consultant
corrosion engineer
Which of the following can cause a pressure relief valve to chatter? This may
have more than
one correct answer, please select all answers that apply.
A. Lengthy pipe to relief device inlet
,B. Oversized relief outlet piping
C. Obstructions in the inlet piping
D. Significantly under-sized relief device
E. Significantly over-sized relief device Right Ans -
For welded pipe, the normal thickness under-tolerance is:
A. -0.00 inch.
B. -0.01 inch.
C. -0.0125 inch.
D. -12.5% of the specified wall thickness. Right Ans - B. -0.01 inch.
When qualifying a weld procedure, the essential variables must:
A. be recorded on only the PQR.
B. be recorded on only the WPS.
C. be recorded on both the WPS and PQR.
D. be recorded on both the WPS and WPQ. Right Ans - C. be recorded on
both the WPS and PQR.
What is the minimum# of RT exposures needed to RT a 2 NPS weld? (No
access to inside)
A. 1
B. 2
C. 3
D. 4 Right Ans - B. 2
When performing preheat to a 0.500" thick pipe, the preheat zone must
extend:
A. 1" beyond the start of the weld.
B. 3" all directions from the start of the weld.
C. 6" all directions from the start of the weld.
D. 12" all directions from the start of the weld. Right Ans - B. 3" all
directions from the start of the weld.
A propane piping pipe in the tank farm area should be classified as:
A. Class 1.
B. Class 2.
C. Class 3.
D. Category D Right Ans - A. Class 1.
, According to ASME B16.5 flanges made from plate materials can only be used
for:
A. blind flanges.
B. Class 150 flanges.
C. Class 150 and 300 flanges.
D. threaded flanges. Right Ans - A. blind flanges.
The corrosiveness of soils can be determined by measuring the soil's:
A. plasticity.
B. resistivity.
C. modulus of elasticity.
D. galvanic potential. Right Ans - B. resistivity.
The flash point of a hydrocarbon is the temperature at which:
A. vapors are first emitted.
B. enough vapors are emitted to support combustion.
C. boiling occurs.
D. auto-ignition occurs. Right Ans - B. enough vapors are emitted to
support combustion.
Which of the following is a required marking on ASME B16.5 flanges?
A. Bolt material
B. Nominal pipe size
C. Outside diameter of flange
D. Temperature rating Right Ans - B. Nominal pipe size
During welding, non-essential variables:
A. must be recorded only on the WPS and must be followed by the welder.
B. must be recorded on the WPS and are optional for the welder.
C. must be recorded on both the WPS and PQR.
D. are optional on both the WPS and PQR. Right Ans - A. must be recorded
only on the WPS and must be followed by the welder.
MIC occurring in 300-series stainless steel usually forms :
A. cup-shaped pits.
B. cone-shaped pits.
C. sub-surface cavities.
D. uniform wall loss. Right Ans - C. sub-surface cavities.
