Open Book API 510 Practice Exam A; Questions
& Answers 100% Correct
A vessel is to under go a hydrostatic test after a repair. The vessel's stress
allowable at the test temperature is 15,000 psi and its stress allowable at its
operating temperature is 13,800 psi. The vessel's MAWP at its design
temperature is 125 psi. What will be the required test pressure at the top of the
vessel? Answer-176.6 psi
A cylindrical shell contains a welded long joint that is made using a backing strip
that remains in place. All of the radiography requirements of UW 12 (a) have
been met. For purposes of calculating circumferential stress on the cylinder,
what will be the value of the joint E used in the calculation? Answer-.90
A small exchanger has experienced internal corrosion of its tubes. The tubes are
required to withstand an external pressure of 350 psi. The tubes have and O. D.
of 2.0 inch and are 60 inches in length with a wall thickness of .025 inch. What
would be the approximate Factor A value for this combination of length
diameter and thickness of tube is? Answer-.00055
An additional 4 inch nozzle was added to a pressure vessel and is similar to the
one in Fig UW-l6.1(i). The minimum thickness of the nozzle is .377 inch and the
shell minimum thickness is .750 inch. What is the decimal value of the minimum
, Open Book API 510 Practice Exam A; Questions
& Answers 100% Correct
throat required for each of two equal leg size fillet welds on this attachment?
Answer-.250'
A cylindrical shell has a seamless hemispherical head on one end and a seamless
ellipsoidal head on the other end. The elliptical head is attached by a type 2
weld meeting the spot radiography requirements of UW-11(a)(5)(b). The shell
has a single longitudinal joint. All category A butt welds are type 1 with full
radiography applied. The vessel will require an MAWP of 50 psi . The material of
the shell and head is SA-515-Gr. 60. The allowable stress at the operating
temperature is 15,000 psi. The heads inside diameter is 10'-0". What is the
required thickness of the 2 to 1 ellipsoidal head? Answer-.200
You have received the following tension test results for a welding procedure,
what is the ultimate unit stress for these two specimens?
Specimen | Width | Thickness
1 | .750 | .410
2 | .748 | .409
Area | Ultimate Total Load lb | Ultimate Unit Stress
& Answers 100% Correct
A vessel is to under go a hydrostatic test after a repair. The vessel's stress
allowable at the test temperature is 15,000 psi and its stress allowable at its
operating temperature is 13,800 psi. The vessel's MAWP at its design
temperature is 125 psi. What will be the required test pressure at the top of the
vessel? Answer-176.6 psi
A cylindrical shell contains a welded long joint that is made using a backing strip
that remains in place. All of the radiography requirements of UW 12 (a) have
been met. For purposes of calculating circumferential stress on the cylinder,
what will be the value of the joint E used in the calculation? Answer-.90
A small exchanger has experienced internal corrosion of its tubes. The tubes are
required to withstand an external pressure of 350 psi. The tubes have and O. D.
of 2.0 inch and are 60 inches in length with a wall thickness of .025 inch. What
would be the approximate Factor A value for this combination of length
diameter and thickness of tube is? Answer-.00055
An additional 4 inch nozzle was added to a pressure vessel and is similar to the
one in Fig UW-l6.1(i). The minimum thickness of the nozzle is .377 inch and the
shell minimum thickness is .750 inch. What is the decimal value of the minimum
, Open Book API 510 Practice Exam A; Questions
& Answers 100% Correct
throat required for each of two equal leg size fillet welds on this attachment?
Answer-.250'
A cylindrical shell has a seamless hemispherical head on one end and a seamless
ellipsoidal head on the other end. The elliptical head is attached by a type 2
weld meeting the spot radiography requirements of UW-11(a)(5)(b). The shell
has a single longitudinal joint. All category A butt welds are type 1 with full
radiography applied. The vessel will require an MAWP of 50 psi . The material of
the shell and head is SA-515-Gr. 60. The allowable stress at the operating
temperature is 15,000 psi. The heads inside diameter is 10'-0". What is the
required thickness of the 2 to 1 ellipsoidal head? Answer-.200
You have received the following tension test results for a welding procedure,
what is the ultimate unit stress for these two specimens?
Specimen | Width | Thickness
1 | .750 | .410
2 | .748 | .409
Area | Ultimate Total Load lb | Ultimate Unit Stress
