Closed Book API 510 Final Exam
A certain C.S. vessel which required impact testing was required
to have PWHT initially according to code requirement. After 10
years when repaired by welding PWHT is to be carried out.
Performing PWHT is found to be impracticable. Which of the
following is relevant (as per API-510)? Correct Answer Carry
out temper-bead welding as alternative to PWHT.
A cylindrical shell with thickness = 4.0", ID=96", S=17100 and
E=0.85 and C.A. = 1/8" showed metal loss of 1/4" in areas 8" on
either side of the longitudinal welds. You analysis of situation
is: Correct Answer b and c above
A vessel which was inspected six years ago and had shell
thickness = 0.870". As on today the thickness as reported by
filed inspection is 0.786. What was the corrosion rate over last
six years? Correct Answer 14 mpy
After an inspection interval is completed and if calculations
indicate that an inaccurate rate of corrosion has been assumed
initially, how do you determine the corrosion rate for the next
inspection period? Correct Answer The corrosion rate shall be
adjusted to agree with the actual rate found.
An ellipsoidal head has an internal diameter of 76 inches and
depth of 21 inches (including a straight face dimension of 2
inches). What should its spherical (crown) radius be? Correct
Answer 68.4 inches
, An RBI assessment can be used to alter the inspection strategy
provided: Correct Answer Both A and B above
API 576 does not address: Correct Answer Training
requirements for mechanics involved in inspection and repair of
pressure relieving devices
As per ASME Sec. VIII Div. 1, if permanent deformation is
observed due to over pressure during hydrotesting: Correct
Answer The inspector may reject the vessel.
Before carrying out an inter service inspection on a vessel put
in-service for quite some time what the inspector should do first
Correct Answer Check the progressive history file of the
vessel.
Calculate the remaining life and external insp. interval of a
vessel given the following data:
Actual thickness = 0.955 inch
Minimum thickness required = 0.755 inch
Thickness at previous inspection 5 years prior to present
inspection = 1.025 inch Correct Answer 14 years, 5years
Certification of contaminants shall be obtained for all PT
materials used on: Correct Answer Austenitic stainless steels
Cracks and laminations look similar from surface however,
generally: Correct Answer a and b above
A certain C.S. vessel which required impact testing was required
to have PWHT initially according to code requirement. After 10
years when repaired by welding PWHT is to be carried out.
Performing PWHT is found to be impracticable. Which of the
following is relevant (as per API-510)? Correct Answer Carry
out temper-bead welding as alternative to PWHT.
A cylindrical shell with thickness = 4.0", ID=96", S=17100 and
E=0.85 and C.A. = 1/8" showed metal loss of 1/4" in areas 8" on
either side of the longitudinal welds. You analysis of situation
is: Correct Answer b and c above
A vessel which was inspected six years ago and had shell
thickness = 0.870". As on today the thickness as reported by
filed inspection is 0.786. What was the corrosion rate over last
six years? Correct Answer 14 mpy
After an inspection interval is completed and if calculations
indicate that an inaccurate rate of corrosion has been assumed
initially, how do you determine the corrosion rate for the next
inspection period? Correct Answer The corrosion rate shall be
adjusted to agree with the actual rate found.
An ellipsoidal head has an internal diameter of 76 inches and
depth of 21 inches (including a straight face dimension of 2
inches). What should its spherical (crown) radius be? Correct
Answer 68.4 inches
, An RBI assessment can be used to alter the inspection strategy
provided: Correct Answer Both A and B above
API 576 does not address: Correct Answer Training
requirements for mechanics involved in inspection and repair of
pressure relieving devices
As per ASME Sec. VIII Div. 1, if permanent deformation is
observed due to over pressure during hydrotesting: Correct
Answer The inspector may reject the vessel.
Before carrying out an inter service inspection on a vessel put
in-service for quite some time what the inspector should do first
Correct Answer Check the progressive history file of the
vessel.
Calculate the remaining life and external insp. interval of a
vessel given the following data:
Actual thickness = 0.955 inch
Minimum thickness required = 0.755 inch
Thickness at previous inspection 5 years prior to present
inspection = 1.025 inch Correct Answer 14 years, 5years
Certification of contaminants shall be obtained for all PT
materials used on: Correct Answer Austenitic stainless steels
Cracks and laminations look similar from surface however,
generally: Correct Answer a and b above
