This article is about Cathode Protection QC and Deep Anode Bed Installation ICCP for Cathodic protection QC Aramco for Interview Preparation and CBT Exam Test of Aramco.
ICCP Deep Anode Bed Installation
Impressed Current Cathode Protection (ICCP) deep anode bed installation is a technique used to protect large or complex structures, such as offshore oil rigs, pipelines, or large ships from corrosion. The method involves the installation of one or more anode beds at a considerable distance from the structure being protected.
The deep anode bed is typically located several meters below the surface of the seabed, where it can provide a stable and long-lasting source of electrical current for the ICCP system. The anode bed is usually made up of a series of graphite or mixed-metal oxide anodes that are connected together and connected to the ICCP power supply.
QC Interview Questions for CBT Exams:
- What type of anode materials are used for soil applications in impressed current cathodic protection?
a) Platinum b) Graphite c) High silicon cast iron d) Stainless steel
2. Which specification provides the guidelines for impressed current cathodic protection cables?
a) SAES-X-600 b) 17-SAMSS-017 c) 17-SAMSS-004 d) 17-SAMSS-007
3. Which specification provides the guidelines for conventional (tap adjustable) rectifiers for cathodic protection?
a) SAES-X-600 b) 17-SAMSS-017 c) 17-SAMSS-004 d) 17-SAMSS-007
4. What is the minimum size requirement for the bond conductor?
a) 12 mm² (#10 AWG) b) 16 mm² (#6 AWG) c) 20 mm² (#4 AWG) d) 24 mm² (#2 AWG)
5. What is the maximum voltage drop requirement across the bond conductor?
a) 0.01 volt b) 0.02 volt c) 0.03 volt d) 0.05 volt
6. Which standard/specification provides guidelines for the sizing of bond conductors?
a) SAES-X-600 b) 17-SAMSS-017 c) 17-SAMSS-004 d) 17-SAMSS-007
7. What is the purpose of an above-grade bond box?
a) To protect isolating devices from corrosion b) To provide a location for splicing cables c) To house electrical equipment d) To connect bonding conductors
8. What type of devices should have an above-grade bond box?
a) Anodes b) Rectifiers c) Isolating devices d) Bonding conductors
9. What is the recommended height for mounting the AC power input device for a rectifier?
a) 1 meter b) 1.8 meters c) 3 meters d) 3.5 meters
10. What is the recommended distance between the AC power input device and the rectifier?
a) 0.5 meters b) 1 meter c) 1.8 meters d) 3 meters
11. What is the recommended rating for the circuit breaker or the fused disconnect for the rectifier AC power input?
a) 50% of the rectifier rated input current b) 75% of the rectifier rated input current c) 100% of the rectifier rated input current d) 125% of the rectifier rated input current
12. What is the maximum length of buried main positive cable runs between the rectifier and anode bed junction box?
a) 100 meters b) 150 meters c) 200 meters d) 300 meters
13. Where should all splices be made for buried main positive cable runs?
a) In above-grade splice boxes b) Underground c) In the rectifier d) In the anode bed junction box
14. For buried main positive cable runs between 150 meters and 300 meters in length, where should the splice box be located?
a) At the beginning of the cable run b) At the end of the cable run c) Approximately at the midpoint d) It is not necessary to have a splice box for this length
15. What is the requirement for above-grade cables in cathodic protection systems?
a) They must be unarmored b) They must be run in uncovered cable trays or plastic conduit c) They must be armored or run in covered cable trays or steel conduit d) None of the above
16. How much can negative cables be extended out of the conduit for above-grade structures in cathodic protection systems?
a) Up to 50 mm b) Up to 100 mm c) Up to 250 mm d) Up to 500 mm
17. In cathodic protection systems, what is the maximum length allowed for buried main positive cable runs between the rectifier and anode bed junction box?
a) 50 meters b) 100 meters c) 150 meters d) 300 meters
18. What is the minimum length of insulation required for buried bare copper conductors crossing a pipeline or piping?
a) 2 meters on each side of the pipeline crossing b) 4 meters on each side of the pipeline crossing c) 6 meters on each side of the pipeline crossing d) 8 meters on each side of the pipeline crossing
19. What is the purpose of insulating buried bare copper conductors crossing a pipeline or piping?
a) To prevent interference with cathodic protection b) To protect the pipeline or piping from damage c) To increase the conductivity of the conductor d) To reduce the voltage drop along the conductor
20. Which of the following does not require grounding?
a) CP test stations b) Bond boxes c) Rectifiers d) Junction boxes
21. When are deep anode beds typically used?
A) When surface soil resistivity is low B) When surface soil resistivity is high C) When the area is prone to flooding D) When the ground is rocky
22. What is the purpose of using deep anode beds?
A) To decrease soil resistivity B) To increase soil resistivity C) To reduce the need for cathodic protection D) To save on installation costs
23. How often should the holiday detector be calibrated according to the statement?
a) Every month b) Every six months c) Once a year d) Only when the device shows signs of malfunction
24. Which standard provides guidelines for commissioning cathodic protection systems?
A) 17-SAMSS-007 B) SAEP-332 C) SAES-X-600 D) 17-SAIP-50
25. Which standard provides guidelines for inspecting cathodic protection deep anode beds?
A) 17-SAMSS-007 B) SAEP-332 C) SAES-X-600 D) 17-SAIP-50
26. Which standard provides guidelines for impressed current anodes for cathodic protection?
A) 17-SAMSS-007 B) SAEP-332 C) SAES-X-600 D) 17-SAIP-50
Answers:
| 1 | c) High silicon cast iron | 2 | b) 17-SAMSS-017 |
| 3 | c) 17-SAMSS-004 | 4 | b) 16 mm² (#6 AWG) |
| 5 | d) 0.05 volt | 6 | a) SAES-X-600 |
| 7 | a) To protect isolating devices from corrosion | 8 | c) Isolating devices |
| 9 | b) 1.8 meters | 10 | d) 3 meters |
| 11 | d) 125% of the rectifier rated input current | 12 | b) 150 meters |
| 13 | a) In above-grade splice boxes | 14 | c) Approximately at the midpoint |
| 15 | c) They must be armored or run in covered cable trays or steel conduit | 16 | d) Up to 500 mm |
| 17 | c) 150 meters | 18 | c) 6 meters on each side of the pipeline crossing |
| 19 | a) To prevent interference with cathodic protection. | 20 | a) CP test stations and b) Bond boxes |
| 21 | A) When surface soil resistivity is low | 21 | A) To decrease soil resistivity |
| 23 | b) Every six months | 24 | B) SAEP-332 |
| 25 | D) 17-SAIP-50 | 26 | A) 17-SAMSS-007 |
Read Also: Cathodic Protection QC Notes of Aramco