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Question 1

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

Question 2

The three hardness tests normally used are the:

Options :

A : Schindler, Johnson, Williams

B : Rockwell, Vickes, Brinell

C :

Rockwell, UT, Shearwave

D : Brinell, Vicky, Rockdale

Answer: B

Question 3

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 4

Austenitic stainless steels typically contain chrome and nickel, and are used for:

Options :

A : corrosion resistance

B : resistance to high temperature degradation

C : sulfur resistance

D : both a and b, above

Answer: D

Question 5

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