API 570 Question Bank (API 570 QB001)

15) Select thickness measurement locations (TMLs) within injection point circuits subjected to localised 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 location of expected pipe wall impingement or injected fluid.

d) Establish TMLs at both the upstream and downstream limits of the injection point circuit.

16) 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.

17) 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

18) 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.

19) 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 et up in the deadleg

visit again for more.............

Posted in: API 570,API 570 Question Bank,API 570 Sample Question,Exam Papers,Mock up Questions,Mockup Test,Practice Questions,Question Bank,Sample Questions