Exam (elaborations)
API 570 EXAM (FULL) QUESTIONS AND ANSWERS
- Course
- Institution
API 570 EXAM (FULL) QUESTIONS AND ANSWERS
[Show more]
Content preview
API 570 EXAM (FULL) QUESTIONS AND ANSWERSPressure applied inside a pipe creates stress in the pipe wall. These stresses are
highest on which weld orientation? - Answers -longitudinal weld
Per B31.3, how much RT is conducted on circumferential welds of a pipe in normal
service? - Answers -10%
for welded pipe, the normal thickness of under-tolerance is? - Answers -.010 or 10 mils
The corrosiveness of soils can be determined by measuring the soils: - Answers -
Resistivity
when qualifying a weld procedure the essential variables must: - Answers -be recorded
on both the WPS & PQR
In severe refinery services which type of pipe is normally used? - Answers -seamless
pipe
a pipe has a thickness designation of "40S". what does the "S" mean? - Answers -
Stainless steel
Generally socket-welded pipe is not used for nominal pipe sizes above: - Answers -2
inches
A propane piping system should be classified as? - Answers -Class 1
According to ASME/ANSI B16.5 flanges from plate materials can only be used for: -
Answers -Blind flanges
Preheat should never be substituted for PWHT if: - Answers -the PWHT was used to
prevent environmental cracking.
A pressure test is always required: - Answers -whenever the authorized inspector
believes one is necessary
When can radiography not be used to qualify a welder? - Answers -when using the
GMAW process with the short circuit mode
Generally, raised face flanges should have a surface finish of: - Answers -125-250
micro- inches
During a direct visual exam of a pipe weld, the minimum light intensity should be: -
Answers -100 footcandles
Describe the 3G welding test position. - Answers -Vertical groove Weld
, Seal welding pipe threads: - Answers -may be used to prevent leaks
Liquid thermal relief valves should be set at a pressure not higher than: - Answers -120
%
When fabricating pipe, unknown materials: - Answers -Should never be used (except for
door stops)
The material verification program specified by API 578 covers: - Answers -only pressure
containing components.
what is the interval for thickness measurements on a class 1 piping system? - Answers -
lesser of 5 years or half life of the pipe
According to B31.3, a welder's qualification records from a previous employer can: -
Answers -Be accepted if the inspector approves
When welding together piping components of different thicknesses, the thicker part
should be trimmed with a: - Answers -30 degree taper.
When performing soil-to air inspections on uncoated lines, it is recommended to
excavate the soil: - Answers -6-12 inches.
When performing preheat prior to welding or PWHT, the preheat zone and/or PWHT
must extend how far beyond the edge of the weld? - Answers -1 inch
Flange bolts are unacceptable if the bolt threads do not extend: - Answers -inside the
nut within 1 thread of the nut face
Carbon steel materials are most likely to be incorrectly substituted in: - Answers -a
chrome steel piping system.
Per B31.3 how much of the fabrication should be visually examined for a pipe in severe
cyclic service: - Answers -100 %
When calibrating a UT instrument, that has a delay line with single element unit, use: -
Answers -At least 2 test blocks with thicknesses near the max and min to be examined.
During pipe repairs, which welding discontinuity is always unacceptable? - Answers -
Cracks and Inadequate fusion
What do you call a groove in the parent metal at the toe of a weld? - Answers -undercut
The RT procedure used for a pipe repair must conform to the requirements of: -
Answers -ASME Section 5
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller GEEKA. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79650 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now