API 653 Exam Chapter 9

API 653 Exam Chapter 9 – Tank Repairs and Alterations

Take a Free API 653 Exam Chapter 9 Practice test with Latest Tank Repairs and Alterations Question and Answers

1.

Q1. API 653: repair of defects in shell plate material
Which of the following is not an acceptable method of repairing a corroded area on a shell plate that is at its minimum design thickness?

 
 
 
 

2.

Q2. API 653: repair of defective welds
Which of the following imperfections must always be repaired?

 
 
 
 

3.

Q3. API 653: addition or replacement of shell penetrations
A new nozzle is to be installed in an existing shell. The nozzle is 4 in NPS. The shell is 5/8 in thick and does not meet the current design metal temperature criteria. How must the nozzle be installed?

 
 
 
 

4.

Q4. API 653: addition or replacement of shell penetrations
A new nozzle is to be installed in an existing shell. The nozzle is 1 in NPS. The shell is 3/8 in thick. How must the nozzle be installed?

 
 
 
 

5.

Q5. API 653: repairing tank bottoms
A welded-on patch plate has been used to repair a defect within the critical zone on the tank bottom. Which of the following situations would be unacceptable?

 
 
 
 

6.

Q6. API 653: repairing tank bottoms
A welded-on patch plate is not permitted in the critical zone of tanks operating at what temperature?

 
 
 
 

7.

Q7. API 653: replacement of entire tank bottom
A tank has its entire bottom replaced. Existing shell penetrations may not require raising if the tank material has a yield strength as follows:

 
 
 
 

8.

Q8. API 653: repair of fixed roofs
What is the minimum allowable thickness of new roof plates?

 
 
 
 

9.

Q9. API 653: hot taps
Which of the following statements are true concerning hot taps?

 
 
 
 

10.

Q10. API 653: hot taps
What is the minimum height of liquid required above the hot tap location during hot tapping?

 
 
 
 

11.

Q11. API 653: minimum weld spacings
What is the minimum spacing in any direction between a hot tap
weld and adjacent nozzles in a tank 300 ft in diameter and 0.5 in thick?

 
 
 
 

12.

Q12. API 653: replacement shell plates
Which of the following statements are true when replacing entire shell plates or full height segments?

 
 
 
 

13.

Q13. API 653: shell repairs using lap-welded patches
Lap-welded patches must have rounded corners. What size corner radius should be used?

 
 
 
 

14.

Q14. API 653: NDE requirements
As well as section 12, is there is a summary list of the NDE requirements of API 653 hidden away?

 
 
 
 

Question 1 of 14

Click Here To Read Next API 653 Exam Chapter 10 –Tank Reconstruction

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9.11 Repair and alterations: practice questions

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