Question 1

A welder continuity log should be maintained to allow verification that each welder has utilized each welding

process within a _______ period.

Options :

A : one year

B : 3 month

C : 2 year

D : six month

Answer: D

Question 2

During periodic scheduled inspections, more extensive inspection should be applied to an area beginning __________ upstream of the injection nozzle and continuing for atleast __________ pipe diameters downstream of the injection point.

Options :

A : 10 inches, 20

B : 12 feet, 10

C : 12 inches, 10

D : 10 feet, 10

Answer: C

Question 3

A NPS 4 Schedule 80 (0.337" wall) branch connection is welded into a NPS 6 Schedule 40 (0.280" wall). A 0.375" reinforcing pad is used around the branch connection. The fillet weld sizes are as required by the Code. The branch connection is inserted into the header. The material of the branch and header is ASTM A672 Grade B70. What thickness would be used to determine whether heat treatment of the connection is required ? (Express answer to nearest hundredth)

Options :

A : 0.768"

B : 0.891"

C : 0.998"

D : 0.567"

Answer: B

Question 4

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 5

A blank is required between two NPS 10, 300 lb. class flanges. The maximum pressure in the system is 385 psi at 200 degrees F. A corrosion allowance of 0.175" is required. The inside diameter of the gasket surface is 9.25". The blank is ASTM A516 Grade 70 material with no weld joint. Calculate the pressure design thickness required for the blank

Options :

A : 0.789"

B : 0.692"

C : 0.556

D : 0.768"

Answer: B

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