API 510 Chapter 4 Frequency and Data Evaluation (Sections 6 and 7)

Take a Free API 510 Exam Chapter 4 Practice test with Latest Frequency and Data Evaluation (Sections 6 and 7) Question and Answers

Q1. API 510 section 6.2.1.1: inspection during installation
Which of these would not normally be included in a pre-use (installation) external inspection of a pressure vessel?

(a) Review of detailed design calculation

(b) Check ladders and platforms

(d) Verify the nameplate correlates with the manufacturer’s data report (MDR)

Q2. API 510 section 6.2.1.2: inspection during installation
An inspector discovered that a newly installed vessel has a missing manufacturer’s data report should:

(a) Perform an internal inspection of the vessel

(b) Prohibit the vessel from being used

(d) Inform the owner/user

Q3. API 510 section 6.3: risk-based inspection
An RBI assessment may be used to establish inspection intervals for:

(a) Internal inspections only

(b) Internal and external inspections only &

(d) Vessels that have undergone a service change

Q4. API 510 section 6.4.1: external inspection period
How often should a vessel external inspection be performed on an above-ground vessel?

(a) 5 years

(b) 10 years

(d) It depends on the process

Q5. API 510 section 6.5.1.1: internal inspection interval
What is the interval between internal inspections for a vessel with a projected remaining life of 30 years that is in continuous use?

(a) 5 years

(b) 10 years

(d) At the discretion of the engineer and inspector

Q6. API 510 section 6.5.1.1/6.5.1.2: internal inspection interval
A vessel has a projected remaining life of 15 years under its current regime of being in use 50 % of the time. The remainder of the time it is isolated from the process fluid and damage mechanisms by being filled with nitrogen. What is the internal inspection interval?

(a) 5 years

(b) 712 years

(d) 1212 years

Q7. API 510 section 6.6: PRVs Pressure-relieving devices should be inspected, tested, and maintained in accordance with:

(a) ASME VIII or the ‘applicable code’

(b) API 576

(d) API 520

Q8. API 510 section 6.6.2.2: PRV inspection intervals
The maximum test/inspection interval for PRVs in a ‘typical process service’ is:

(a) 2 years & API 510 Frequency and Data Evaluation

(b) 3 years

(d) 10 years

4.5 API 510 section 7 familiarization questions
Q1. API 510 section 7.1.1.1: corrosion rates
Short-term corrosion rates are typically determined by:

(a) The two most recent thickness readings

(b) Any two sequential thickness readings

(d) Any of the above, as the situation demands

10.

Q2. API 510 section 7.1.2: corrosion rate for vessels/changes in service
A vessel has just changed service and no published or ‘similar service’ data are available to predict the probable corrosion rate under the new service regime. What should the inspector do?

(a) Specify the first internal inspection after 1000 hours of operation

(b) Specify thickness measurements after 1000 hours of operation

(d) Check the service conditions after 1000 hours to see if they are still the same; then specify an internal inspection

11.

Q3. API 510 section 7.4.2: evaluation of locally thinned areas
For vessels with an inside diameter of less than or equal to 60 inches, corroded wall thickness is averaged over a length not exceeding the lesser of:

(a) 1/2 vessel diameter or 20 in

(b) 1/3 vessel diameter or 20 in

(d) 1/2 vessel diameter or 40 in

12.

Q4. API 510 section 7.4.2: evaluation of locally thinned areas
A vessel has an inside diameter of 90 inches. What is the maximum allowed averaging length for calculating corroded wall thickness?

(a) 20 in

(b) 30 in

(d) 48 in

13.

Q5. API 510 section 7.4.2.3: evaluation of locally thinned areas
For an internally pressurized cylindrical vessel shell with no significant induced bending stresses (e.g. wind loads) corrosion is usually averaged along which plane?

(a) Circumferential

(b) Axial (longitudinal)

(d) Any plane containing the worst average corrosion

14.

Q6. API 510 section 7.4.4.2: advanced thinning analysis
As a general rule, the design stress used for an ASME VIII division 2 appendix 4 assessment (when used as an alternative to API 510) is:

(a) 2/3 minimum specified yield strength

(b) 1/2 minimum specified yield strength

(d) 2/3 minimum specified ultimate tensile strength

15.

Q7. API 510 section 7.4.6: assessing corrosion in vessel heads
The effect of corrosion near the center of vessel heads is calculated under API 510 using:

(a) The exact formulae used in ASME VIII-1

(b) The pitting assessment methodology set out in API 510 section 7.4.2

(d) Approximation, to rules, set out in API 510 section 7.4.6

16.

Q8. API 510 section 7.4.6.2: corroded areas in vessel heads
For tori spherical heads, the central portion can be assumed to be a hemisphere of radius equal to:

(a) The shell radius

(b) The head knuckle radius

(d) The shell’s inner diameter

17.

Q9. API 510 section 7.4.6.3: corroded areas in vessel heads
For ellipsoidal heads, the central portion can be assumed to be a hemisphere of radius equal to:

(a) The head inner radius x-factor K1

(b) The head crown radius x-factor K1

(d) Shell outside radius x-factor K1

18.

Q10. API 510 section 7.7: evaluation of vessels with minimal documents
For a pre-1999 pressure vessel that has drawings but no nameplate information the inspector and engineer should:

(a) Perform design calculations using a design factor of UTS/3.5

(b) Perform design calculations to the current edition of the ASME code

(d) Not perform any design calculations without the assistance of the original designer

Question 1 of 18

Click Here To Read Next API 510 Chapter 5 Repair, Alteration, Re-rating (Section 8)

Now try these familiarization questions.

4.3 API 510 section 6 familiarization questions

4.5 API 510 section 7 familiarization questions

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API 510- Chapter 4