Exam (elaborations)
API 570 PRACTICE QUESTIONS AND ANSWERS
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API 570 PRACTICE QUESTIONS AND ANSWERS
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API 570 PRACTICE QUESTIONS AND ANSWERSAPI 570 covers inspection, repair, alteration, and rerating procedures for metallic piping
systems that_______________________.
a. are being fabricated.
b. does not fall under ASTM B31.3.
c. have been in-service.
d. has not been tested. - Answers -C
API 570 was developed for the petroleum refining and chemical process industries.
a. It shall be used for all piping systems.
b. It may be used, where practical, for any piping system.
c. It can be used, where necessary, for steam piping.
d. It may not be used unless agreed to by all parties. - Answers -B
API 570 ________ be used as a substitute for the original construction requirements
governing a piping system before it is placed in-service.
a. shall not
b. should
c. may
d. can - Answers -A
API 570 applies to piping systems for process fluids, hydrocarbons, and similar
flammable or toxic fluid services. Which of the following services is not specifically
applicable?
a. Raw, intermediate, and finished petroleum products.
b. Water, steam condensate, boiler feed water.
c. Raw, intermediate, and finished chemical products.
d. Hydrogen, natural gas, fuel gas, and flare systems. - Answers -B
Some of the classes of piping systems that are excluded or optional for coverage under
API 570 are listed below. Which one is a mandatory included class?
a. Water.
b. Catalyst lines.
c. Steam.
d. Boiler feed water. - Answers -B
Risk Based Inspections include which of the following:
a. Likelihood assessment.
b. Consequence analysis.
c. Operating and Inspection histories.
d. All of the above. - Answers -D
An RBI assessment can be used to alter the inspection strategy provided:
a. The degradation methods are identified.
,b. The RBI is fully documented.
c. A third party conducts the RBI.
d. Both A & B above. - Answers -D
Which one of the following is not a specific type or an area of deterioration?
a. Rectifier performance.
b. Injection points.
c. Deadlegs.
d. Environmental cracking. - Answers -A
Injection points subject to accelerated or localized corrosion may be treated as
________.
a. the focal point of an inspection circuit.
b. separate inspection circuits.
c. piping that must be renewed on a regular schedule.
d. locations where corrosion inhibitors must be used. - Answers -B
The recommended upstream limit of inspection of an injection point is a minimum of:
a. 12 feet or 3 pipe lengths whichever is smaller.
b. 12 inches or 3 pipe diameters whichever is smaller.
c. 12 inches or 3 pipe diameters whichever is greater.
d. 12 feet or 3 pipe lengths whichever is greater. - Answers -C
The recommended downstream limit of inspection of an injection point is a minimum of:
a. second change in flow direction past the injection point, or 25 feet beyond the first
change in flow direction whichever is less.
b. second change in flow direction past the injection point, or 25 feet beyond the first
change in flow direction whichever is greater.
c. second change in flow direction past the injection point, or 25 inches beyond the first
change in flow direction whichever is less.
d. second change in flow direction past the injection point, or 25 inches beyond the first
change in flow direction whichever is greater. - Answers -A
Select thickness measurement locations (TMLs) within injection point circuits subject to
localized corrosion according to the following guidelines. Select the one that does not
belong.
a. Establish TMLs on appropriate fittings within the injection point circuit.
b. Establish at least one TML at a location at least 25 feet beyond the downstream limit
of the injection point.
c. Establish TMLs on the pipe wall at the location of expected pipe wall impingement or
injected fluid.
d. Establish TMLs at both the upstream and downstream limits of the injection point
circuit. - Answers -B
What are the preferred methods of inspecting injection points?
a. Radiography and/or ultrasonics.
,b. Hammer test and/or radiograph.
c. Ultrasonics and/or liquid penetrant.
d. Liquid penetrant and/or eddy current. - Answers -A
During periodic scheduled inspections, more extensive inspection should be applied to
an area beginning __________ upstream of the injection nozzle and continuing for at
least __________ pipe diameters downstream of the injection point.
a. 10 inches, 20
b. 12 feet, 10
c. 12 inches, 10
d. 10 feet, 10 - Answers -C
Why should deadlegs in piping be inspected?
a. API 510 mandates the inspection of deadlegs.
b. Acid products and debris build up in deadlegs.
c. The corrosion rate in deadlegs can vary significantly from adjacent active piping.
d. Caustic products and debris build up in deadlegs. - Answers -C
Both the stagnant end and the connection to an active line of a deadleg should be
monitored. In a hot piping system, why does the high point of a deadleg corrode and
need to be inspected?
a. corrosion occurs due to directed currents set up in the deadleg.
b. erosion occurs due to convective currents set up in the deadleg.
c. corrosion occurs due to convective currents set up in the deadleg.
d. erosion occurs due to directed currents set up in the deadleg. - Answers -C
What is the best thing to do with deadlegs that are no longer in service?
a. Ultrasonically inspect often.
b. Radiograph often.
c. Inspect often.
d. Remove them. - Answers -D
The _________ shall be responsible to the owner-user for determining that the
requirements of API 570 for inspection, examination, and testing are met.
a. Piping Engineer.
b. Inspector.
c. Repair Organization.
d. Operating Personnel. - Answers -B
Who is responsible for the control of piping system inspection programs, inspection
frequencies, and maintenance of piping?
a. Authorized Piping Inspector.
b. Owner-User.
c. Jurisdiction.
d. Contractor. - Answers -B
, An Authorized Piping Inspector shall have the following qualifications. Pick the one that
does not belong in this list.
a. Four years of experience inspecting in-service piping systems.
b. High school education plus 3 years of experience in the design, construction, repair,
operation, or inspection of piping systems.
c. Two year certificate in engineering or technology plus 2 years of experience in the
design, construction, repair, operation, or inspection of piping systems.
d. Degree in engineering plus one year experience in the design, construction, repair,
operation, or inspection of piping systems. - Answers -A
What are the most common forms of corrosion under insulation (CUI).
a. localized corrosion of nonferrous metals and chloride stress corrosion cracking of
carbon steel.
b. localized corrosion of chrome-moly steel and chloride stress corrosion cracking of
ferritic stainless steel.
c. localized corrosion of carbon steel and chloride stress corrosion cracking of austenitic
stainless steel.
d. localized corrosion of nickel-silicon alloy and caustic stress corrosion of austenitic
stainless steel. - Answers -C
What climatic area may require a very active program for corrosion under insulation?
a. Cooler northern continent locations.
b. Cooler drier, midcontinent locations.
c. Warmer, marine locations.
d. Warmer drier, desert locations. - Answers -C
Certain areas and types of piping systems are potentially more susceptible to corrosion
under insulation.
Which of the items listed is not susceptible to CUI?
a. Areas exposed to mist overspray from cooling water towers.
b. Carbon steel piping systems that normally operate in-service above 250 degrees but
are in intermittent service.
c. Deadlegs and attachments that protrude from insulated piping and operate at a
different temperature than the temperature of the active line.
d. Carbon steel piping systems, operating between 250 degrees F and 600 degrees F. -
Answers -D
What location is subject to corrosion under insulation and inspection contributes to it.
a. Locations where pipe hangers and other supports exist.
b. Locations where insulation has been stripped to permit inspection of the piping.
c. Locations where insulation plugs have been removed to permit piping thickness
measurements.
d. Locations where there is damaged or missing insulation jacketing. - Answers -C
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