API 570 Piping Inspection Practice Test, Exams of Computer Science

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API 570 PRACTICE TEST QUESTIONS AND ANSWERS

In severe refinery services which type of pipe is normally used? - Answers -seamless

Pressure 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

when qualifying a weld procedure the esential variables must: - Answers -be recorded on both the WPS & PQR

a pipe has a thickness designation of "40S". what does the "S" mean? - Answers - stainless steel

Who has the responsibility to determine the extent of PMI performed? - Answers - owner/user

An inservice process pipe should be classified as Class 1 when the % of H2S exceeds:

• Answers -3%

A welder becomes unqualified when he has not welded using the: - Answers -Process for 6 months

A PQR test coupon with a shell thickness of "T" can generally be used to qualify a wall thickness on the WPS up to. - Answers -2T

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- 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

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 - %

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"

When performing preheat prior to welding, the preheat zone 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.

Generally socket-welded pipe is not used for nominal pipe sizes above: - Answers - 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

The corrosiveness of soils can be determined by measuring the soils: - Answers - Resistivity

Preheat should never be substituted for PWHT if: - Answers -The PWHT was designed to prevent environmental cracking

During welding, non-esential variables: - Answers -Must be recorded only on the WPS and must be followed by the welder.

During a hydrotest, all joints should be: - Answers -left uninsulated

ASME/ANSI B16.5 requires flanges to be: - Answers -marked with the class rating.

Graphitization of carbon steels begins to occur when metal temperatures exceed: - Answers -800 F

During pipe fabrication who has overall responsibility for compliance with the code? - Answers -owner/user

During an API 570 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 -Sec 5

What is the minimum holding time for all pressure tests on piping? - Answers -10 mins

When a relief device or valve is removed for repair, the inspector should: - Answers - inspect the inside of the inlet and outlet piping where the valve was removed.

Thickness measurements are suggested at pipefittings since: - Answers -directional changes generally create increased turbulence.

Flange leaks in certain fluids can cause: - Answers -bolts to crack and corrode

Heat Tracing could cause cracking in carbon steel piping which is in: - Answers -Caustic service

Excessive repairs to pump bearings may be a result of: - Answers -excessive forces coming from thermal growth in the attached piping system

Loose or broken anchor bolts at pipe supports are most easily detected by: - Answers - hammer testing

A pneumatic pressure test is to be conducted on a Normal Service piping system. During pipe erection, how many of the joint assemblies should be examined? - Answers -100 %

During a pipe repair, preheat is substituted for the required PWHT. What is the minimum preheat temperature. - Answers -300 F