Question 1

A local area has been thinned on the wall thickness of a flanged fitting. The fitting is NPS 8 Class 400, and the local area has been thinned to 0.400”. Is this corrosion acceptable per ASME B 16.5?

Options :

A : Yes

B : No

C : Cannot be calculated from information given

D : Wall thicknesses may not be less than that shown in B16.5

Answer: B

Question 2

A combination of corrosion and erosion results in significantly greater metal loss that can be expected from corrosion or erosion alone. This type of loss occurs at

Options :

A : high-velocity and high-turbulence areas

B : areas where condensation or exposure to wet hydrogen sulphide or carbonates occur

C : surface-to-air interfaces f buried piping

D : areas where gradual loss of material occurs because of a corrosive medium

Answer: A

Question 3

A welder continuity log should be maintained to allow verification that each welder has utilized each weldingprocess within a _______ period.

Options :

A : one year

B : 3 month

C : 2 year

D : six month

Answer: D

Question 4

Resistance to sulphidation is generally achieved by

Options :

A : Upgrading to higher nickel alloys

B : Upgrading to higher chromium alloys

C : Upgrading to higher copper based alloys

D : All of the above.

Answer: B

Question 5

The total resistivity for a Wenner 4-Pin test that utilizes pins spaced 2 feet apart and a 6 “R” factor is:

Options :

A : 2298 ohm/cm

B : 3500 ohm/cm

C : 6000 ohm/cm

D : 8000 ohm/cm

Answer: A

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