API 570 Question Bank (API 570 QB001)

136) Acceptance of a welded repair or alteration shall include __________ in accordance with the applicable code and the owner-user's specification, unless otherwise specified in API 570.

a) Nominal Pragmatic Sizing (NPS)

b) NBE

c) Safeguards

d) Nondestructive examination

137) After welding is completed on a repair or alteration, __________ in accordance with API 570 shall be performed if practical and deemed necessary by the inspector.

a) NPS

b) Safety sanctions

c) BE

d) A pressure test

138) When are pressure tests normally required?

a) Pressure tests are normally required after alterations and any repair

b) Pressure tests are normally required after alterations and major repairs

c) Pressure tests are normally required after major and minor repairs

d) Pressure tests are normally required only as specified by the owner-user

139) When a pressure test is not necessary or practical, what shall be utilised in lieu of a pressure test?

a) NPS

b) Nondestructive examination

c) Vacuum visual examination

d) NBE

140) Special procedure in place of a pressure test after an alteratino or repair may be done only after consultation with :-

a) The operations and the repair organisation

b) The inspector and the piping engineer

c) The jurisdiction

d) The examiner and the inspector

141) When it is not practical to perform a pressure test of a final closure weld that joins a new or replacement section of piping to an existing system, several requirements shall be satisfied. Which of the following is NOT one of the requirements?

a) The closure weld is a full-penetration fillet weld between a weld neck flange and standard piping component or straight sections of pipe of equal diameter and thickness, axially aligned, and or equivalent materials. For design cases up to Class 150 and 500oF, slip-on flanges are acceptable alternates.

b) MT or PT shall be performed on the root pass and the completed butt weld. Fillet welds must have PT / MT on the completed weld.

c) The new or replacement piping is pressure tested.

d) Any final closure butt weld shall be of 100 % radiographic quality; or angle-beam UT may be used, provide the appropriate acceptance criteria is established.

142) Which of the following is NOT a requirement for re-rating a piping system by changing the temperature or the MAWP:

a) The existing pressure relieving devices are still in place and set as they were originally

b) Calculations are performed by the piping engineer or the inspector

c) Piping flexibility is adequate for design temperature changes

d) A decrease in minimum operating temperature is justified by impact test results, if required by the applicable code.

143) Why is the inspector of buried process piping (not regulated by DOT) different from other process piping inspection ?

a) The insulating effect of the soil increases the possibility of more internal combustion

b) Internal corrosion has to be controlled by cathodic protection

c) Significant external deterioration can be caused by corrosive soil conditions

d) Internal corrosion must be controlled by internal coatings.

144) Indications of leaks in buried piping may include several indications. Which of the ones listed below is NOTone of the indications ?

a) A change in the surface contour of the ground.

b) Water standing on the pipeline right-of-way

c) Discoloration of the soil

d) Notice odour

145) Corrosion cells can form on both bare and coated pipe where bare steel contacts the soil. How can these cells be detected ?

a) Run an acoustic emission test on the piping

b) Visually survey the route of buried piping

c) The potential at the area of corrosion will be measurable different than other areas and a close-interval potential survey can detect the location of corrosion

d) Run an internal survey of the piping using a video camera

146) A pipe coating holiday survey is used to locate coating defects on coated pipes. It can be used on newly constructed pipe systems to ensure that the coating is intact and holiday-free. More often, it is used on buried pipe to:

a) Show the measurable differences in electrical potential in corroded areas

b) Evaluate coating serviceability for buried piping that has been in-service for along time.

c) Determine the depth of the piping for resistivity testing

d) Evaluate the cathodic protection components of the under-ground pipe

147) Cathodically protected buried piping should be monitored __________ to assure adequate levels of protection:

a) Regularly

b) Intermittently

c) Erratically

d) Frequently

148) If an "intelligent pigging" system is used to inspect buried piping, what type of bends are usually required in the piping system ?

a) Five diameter bends

b) 90 degree pipe ells

c) Ten diameter bends

d) Three diameter bends

149) How often should above-grade visual surveillance of a buried pipeline right-of-way be made?

a) Once a month

b) Approximately 6 month intervals

c) Once a year

d) Once every 3 months

150) How often should poorly coated pipes with inconsistent cathodic protection potentials have a pipe-to-soil potential survey made ?

a) Yearly

b) Every 2 years

c) Every 5 years

d) Every 7 years

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