PHMSA PL32933 CORROSION CONTROL PRACTICE - ORIGINAL QUESTIONS
PHMSA
2026/2027
PHMSA PL32933 CORROSION CONTROL
PRACTICE STUDY GUIDE - 150 ORIGINAL QUESTIONS + SOLUTIONS
BASED ON 49 CFR 192/195 | NOT ACTUAL EXAM
150Q PRACTICE STUDY GUIDE DETAILED
PHMSA Corrosion Control Practice Guide | Not affiliated | Educational Only
,Corrosion Theory Cathodic Protection Coatings PHMSA 192/195
Description: PHMSA PL32933 Corrosion Control Practice core based on 49 CFR 192 195 Subpart I corrosion electrochemical oxidation Fe anode reduction cathode O2
electrolyte soil galvanic series noble active steel copper corrosion cells galvanic concentration pitting crevice cathodic protection makes pipeline cathode electron supply
galvanic magnesium zinc impressed ICCP rectifier anode bed graphite MMO required per 192.455 195.557 buried submerged must have CP within 1 year coating first
defense per 192.461 FBE 3LPE tape holidays jeep inspection combined with CP criteria per 192.463 195.571 NACE SP0169 -850 off CSE instant off IR free 100 mV
polarization shift -850 on with IR consideration 100 mV bare testing CSE half-cell on off interrupter eliminates IR polarization AC/DC interference AC power parallel induces
15V shock corrosion mitigation grounding zinc ribbon decoupled decoupler gradient mats DC stray transit foreign CP bonds drainage CIPS close interval 2-5 ft on off
potentials finds low DCVG voltage gradient finds holidays 1-3% IR ECDA four steps NACE SP0502 internal corrosion per 192.475 195.579 water CO2 H2S O2 MIC
bacteria dehydration inhibitor pigging coupon ER UT sampling atmospheric per 192.479 195.581 coating paint inspection 3 years onshore yearly offshore CUI records per
192.491 195.589 retain life pipeline OQ per 192.453 195.505 covered task qualified PL32933A external PL32933B internal.
Page 2 - PHMSA PL32933 Practice 150Q
,Question 1: What is corrosion galvanic series pipeline steel? Corrosion oxidation Fe to Fe2+ anode galvanic series noble to active
steel active to copper
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. What is corrosion galvanic series pipeline steel? Corrosion oxidation Fe to Fe2+ anode galvanic series noble to active steel active to copper - per
PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
C. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
D. Incorrect: Ignore AC interference no grounding shock hazard
CORRECT ANSWER: B. What is corrosion galvanic series pipeline steel? Corrosion oxidation Fe to Fe2+ anode galvanic series noble to active
steel active to copper - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: What is corrosion galvanic series pipeline steel? Corrosion oxidation Fe to Fe2+ anode galvanic series noble to active steel active to copper - per PHMSA 49
CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 2: Cathodic protection principle per 192.455? CP makes pipeline cathode supplying electrons galvanic anodes impressed
current prevents anodic dissolution required buried
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
C. Cathodic protection principle per 192.455? CP makes pipeline cathode supplying electrons galvanic anodes impressed current prevents anodic
dissolution required buried - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
D. Incorrect: Ignore AC interference no grounding shock hazard
CORRECT ANSWER: C. Cathodic protection principle per 192.455? CP makes pipeline cathode supplying electrons galvanic anodes
impressed current prevents anodic dissolution required buried - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: Cathodic protection principle per 192.455? CP makes pipeline cathode supplying electrons galvanic anodes impressed current prevents anodic dissolution
required buried - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 3: PHMSA CP criteria per 192.463? -850 mV off CSE 100 mV polarization shift -850 on with IR 100 mV bare per NACE SP0169
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
C. Incorrect: Ignore AC interference no grounding shock hazard
D. PHMSA CP criteria per 192.463? -850 mV off CSE 100 mV polarization shift -850 on with IR 100 mV bare per NACE SP0169 - per PHMSA 49 CFR
192 Subpart I 195 Subpart H NACE SP0169 SP0200
CORRECT ANSWER: D. PHMSA CP criteria per 192.463? -850 mV off CSE 100 mV polarization shift -850 on with IR 100 mV bare per NACE
SP0169 - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: PHMSA CP criteria per 192.463? -850 mV off CSE 100 mV polarization shift -850 on with IR 100 mV bare per NACE SP0169 - per PHMSA 49 CFR 192
Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 4: Test CP CSE half-cell IR drop? Place CSE over pipe measure pipe-to-soil on and off interrupt current instant off eliminates
IR
A. Test CP CSE half-cell IR drop? Place CSE over pipe measure pipe-to-soil on and off interrupt current instant off eliminates IR - per PHMSA 49 CFR
192 Subpart I 195 Subpart H NACE SP0169 SP0200
B. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
C. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
D. Incorrect: Ignore AC interference no grounding shock hazard
CORRECT ANSWER: A. Test CP CSE half-cell IR drop? Place CSE over pipe measure pipe-to-soil on and off interrupt current instant off
eliminates IR - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: Test CP CSE half-cell IR drop? Place CSE over pipe measure pipe-to-soil on and off interrupt current instant off eliminates IR - per PHMSA 49 CFR 192
Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 5: Coating role per 192.461? Coating first defense barrier isolates steel FBE 3LPE tape holidays inspection combined with CP
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. Coating role per 192.461? Coating first defense barrier isolates steel FBE 3LPE tape holidays inspection combined with CP - per PHMSA 49 CFR 192
Subpart I 195 Subpart H NACE SP0169 SP0200
C. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
D. Incorrect: Ignore AC interference no grounding shock hazard
CORRECT ANSWER: B. Coating role per 192.461? Coating first defense barrier isolates steel FBE 3LPE tape holidays inspection combined
with CP - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: Coating role per 192.461? Coating first defense barrier isolates steel FBE 3LPE tape holidays inspection combined with CP - per PHMSA 49 CFR 192 Subpart
I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 6: AC/DC interference mitigation? AC power lines induces voltage mitigation grounding zinc ribbon decoupled DC stray
transit bonds drainage
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
C. AC/DC interference mitigation? AC power lines induces voltage mitigation grounding zinc ribbon decoupled DC stray transit bonds drainage - per
PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
D. Incorrect: Ignore AC interference no grounding shock hazard
Page 3 - PHMSA PL32933 Practice 150Q
, CORRECT ANSWER: C. AC/DC interference mitigation? AC power lines induces voltage mitigation grounding zinc ribbon decoupled DC stray
transit bonds drainage - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: AC/DC interference mitigation? AC power lines induces voltage mitigation grounding zinc ribbon decoupled DC stray transit bonds drainage - per PHMSA 49
CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 7: CIPS DCVG for PL32933? CIPS close interval 2-5 ft finds low potentials DCVG voltage gradient finds coating holidays
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
C. Incorrect: Ignore AC interference no grounding shock hazard
D. CIPS DCVG for PL32933? CIPS close interval 2-5 ft finds low potentials DCVG voltage gradient finds coating holidays - per PHMSA 49 CFR 192
Subpart I 195 Subpart H NACE SP0169 SP0200
CORRECT ANSWER: D. CIPS DCVG for PL32933? CIPS close interval 2-5 ft finds low potentials DCVG voltage gradient finds coating holidays -
per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: CIPS DCVG for PL32933? CIPS close interval 2-5 ft finds low potentials DCVG voltage gradient finds coating holidays - per PHMSA 49 CFR 192 Subpart I 195
Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 8: Internal corrosion per 192.475 195.579? Water CO2 H2S O2 bacteria control dehydration inhibitor pigging coupon
monitoring sampling
A. Internal corrosion per 192.475 195.579? Water CO2 H2S O2 bacteria control dehydration inhibitor pigging coupon monitoring sampling - per PHMSA
49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
B. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
C. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
D. Incorrect: Ignore AC interference no grounding shock hazard
CORRECT ANSWER: A. Internal corrosion per 192.475 195.579? Water CO2 H2S O2 bacteria control dehydration inhibitor pigging coupon
monitoring sampling - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: Internal corrosion per 192.475 195.579? Water CO2 H2S O2 bacteria control dehydration inhibitor pigging coupon monitoring sampling - per PHMSA 49 CFR
192 Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 9: Corrosion records OQ per 192.453? Records life pipeline CP readings surveys OQ qualified persons corrosion tasks
PL32933
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. Corrosion records OQ per 192.453? Records life pipeline CP readings surveys OQ qualified persons corrosion tasks PL32933 - per PHMSA 49 CFR
192 Subpart I 195 Subpart H NACE SP0169 SP0200
C. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
D. Incorrect: Ignore AC interference no grounding shock hazard
CORRECT ANSWER: B. Corrosion records OQ per 192.453? Records life pipeline CP readings surveys OQ qualified persons corrosion tasks
PL32933 - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: Corrosion records OQ per 192.453? Records life pipeline CP readings surveys OQ qualified persons corrosion tasks PL32933 - per PHMSA 49 CFR 192
Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 10: Atmospheric corrosion per 192.479? Aboveground pipe coating painting inspection 3 years onshore yearly offshore
correction if pitting
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
C. Atmospheric corrosion per 192.479? Aboveground pipe coating painting inspection 3 years onshore yearly offshore correction if pitting - per PHMSA
49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
D. Incorrect: Ignore AC interference no grounding shock hazard
CORRECT ANSWER: C. Atmospheric corrosion per 192.479? Aboveground pipe coating painting inspection 3 years onshore yearly offshore
correction if pitting - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: Atmospheric corrosion per 192.479? Aboveground pipe coating painting inspection 3 years onshore yearly offshore correction if pitting - per PHMSA 49 CFR
192 Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 11: What is corrosion galvanic series pipeline steel? Corrosion oxidation Fe to Fe2+ anode galvanic series noble to active
steel active to copper
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
C. Incorrect: Ignore AC interference no grounding shock hazard
D. What is corrosion galvanic series pipeline steel? Corrosion oxidation Fe to Fe2+ anode galvanic series noble to active steel active to copper - per
PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
CORRECT ANSWER: D. What is corrosion galvanic series pipeline steel? Corrosion oxidation Fe to Fe2+ anode galvanic series noble to active
steel active to copper - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: What is corrosion galvanic series pipeline steel? Corrosion oxidation Fe to Fe2+ anode galvanic series noble to active steel active to copper - per PHMSA 49
CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Page 4 - PHMSA PL32933 Practice 150Q
PHMSA
2026/2027
PHMSA PL32933 CORROSION CONTROL
PRACTICE STUDY GUIDE - 150 ORIGINAL QUESTIONS + SOLUTIONS
BASED ON 49 CFR 192/195 | NOT ACTUAL EXAM
150Q PRACTICE STUDY GUIDE DETAILED
PHMSA Corrosion Control Practice Guide | Not affiliated | Educational Only
,Corrosion Theory Cathodic Protection Coatings PHMSA 192/195
Description: PHMSA PL32933 Corrosion Control Practice core based on 49 CFR 192 195 Subpart I corrosion electrochemical oxidation Fe anode reduction cathode O2
electrolyte soil galvanic series noble active steel copper corrosion cells galvanic concentration pitting crevice cathodic protection makes pipeline cathode electron supply
galvanic magnesium zinc impressed ICCP rectifier anode bed graphite MMO required per 192.455 195.557 buried submerged must have CP within 1 year coating first
defense per 192.461 FBE 3LPE tape holidays jeep inspection combined with CP criteria per 192.463 195.571 NACE SP0169 -850 off CSE instant off IR free 100 mV
polarization shift -850 on with IR consideration 100 mV bare testing CSE half-cell on off interrupter eliminates IR polarization AC/DC interference AC power parallel induces
15V shock corrosion mitigation grounding zinc ribbon decoupled decoupler gradient mats DC stray transit foreign CP bonds drainage CIPS close interval 2-5 ft on off
potentials finds low DCVG voltage gradient finds holidays 1-3% IR ECDA four steps NACE SP0502 internal corrosion per 192.475 195.579 water CO2 H2S O2 MIC
bacteria dehydration inhibitor pigging coupon ER UT sampling atmospheric per 192.479 195.581 coating paint inspection 3 years onshore yearly offshore CUI records per
192.491 195.589 retain life pipeline OQ per 192.453 195.505 covered task qualified PL32933A external PL32933B internal.
Page 2 - PHMSA PL32933 Practice 150Q
,Question 1: What is corrosion galvanic series pipeline steel? Corrosion oxidation Fe to Fe2+ anode galvanic series noble to active
steel active to copper
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. What is corrosion galvanic series pipeline steel? Corrosion oxidation Fe to Fe2+ anode galvanic series noble to active steel active to copper - per
PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
C. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
D. Incorrect: Ignore AC interference no grounding shock hazard
CORRECT ANSWER: B. What is corrosion galvanic series pipeline steel? Corrosion oxidation Fe to Fe2+ anode galvanic series noble to active
steel active to copper - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: What is corrosion galvanic series pipeline steel? Corrosion oxidation Fe to Fe2+ anode galvanic series noble to active steel active to copper - per PHMSA 49
CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 2: Cathodic protection principle per 192.455? CP makes pipeline cathode supplying electrons galvanic anodes impressed
current prevents anodic dissolution required buried
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
C. Cathodic protection principle per 192.455? CP makes pipeline cathode supplying electrons galvanic anodes impressed current prevents anodic
dissolution required buried - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
D. Incorrect: Ignore AC interference no grounding shock hazard
CORRECT ANSWER: C. Cathodic protection principle per 192.455? CP makes pipeline cathode supplying electrons galvanic anodes
impressed current prevents anodic dissolution required buried - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: Cathodic protection principle per 192.455? CP makes pipeline cathode supplying electrons galvanic anodes impressed current prevents anodic dissolution
required buried - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 3: PHMSA CP criteria per 192.463? -850 mV off CSE 100 mV polarization shift -850 on with IR 100 mV bare per NACE SP0169
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
C. Incorrect: Ignore AC interference no grounding shock hazard
D. PHMSA CP criteria per 192.463? -850 mV off CSE 100 mV polarization shift -850 on with IR 100 mV bare per NACE SP0169 - per PHMSA 49 CFR
192 Subpart I 195 Subpart H NACE SP0169 SP0200
CORRECT ANSWER: D. PHMSA CP criteria per 192.463? -850 mV off CSE 100 mV polarization shift -850 on with IR 100 mV bare per NACE
SP0169 - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: PHMSA CP criteria per 192.463? -850 mV off CSE 100 mV polarization shift -850 on with IR 100 mV bare per NACE SP0169 - per PHMSA 49 CFR 192
Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 4: Test CP CSE half-cell IR drop? Place CSE over pipe measure pipe-to-soil on and off interrupt current instant off eliminates
IR
A. Test CP CSE half-cell IR drop? Place CSE over pipe measure pipe-to-soil on and off interrupt current instant off eliminates IR - per PHMSA 49 CFR
192 Subpart I 195 Subpart H NACE SP0169 SP0200
B. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
C. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
D. Incorrect: Ignore AC interference no grounding shock hazard
CORRECT ANSWER: A. Test CP CSE half-cell IR drop? Place CSE over pipe measure pipe-to-soil on and off interrupt current instant off
eliminates IR - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: Test CP CSE half-cell IR drop? Place CSE over pipe measure pipe-to-soil on and off interrupt current instant off eliminates IR - per PHMSA 49 CFR 192
Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 5: Coating role per 192.461? Coating first defense barrier isolates steel FBE 3LPE tape holidays inspection combined with CP
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. Coating role per 192.461? Coating first defense barrier isolates steel FBE 3LPE tape holidays inspection combined with CP - per PHMSA 49 CFR 192
Subpart I 195 Subpart H NACE SP0169 SP0200
C. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
D. Incorrect: Ignore AC interference no grounding shock hazard
CORRECT ANSWER: B. Coating role per 192.461? Coating first defense barrier isolates steel FBE 3LPE tape holidays inspection combined
with CP - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: Coating role per 192.461? Coating first defense barrier isolates steel FBE 3LPE tape holidays inspection combined with CP - per PHMSA 49 CFR 192 Subpart
I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 6: AC/DC interference mitigation? AC power lines induces voltage mitigation grounding zinc ribbon decoupled DC stray
transit bonds drainage
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
C. AC/DC interference mitigation? AC power lines induces voltage mitigation grounding zinc ribbon decoupled DC stray transit bonds drainage - per
PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
D. Incorrect: Ignore AC interference no grounding shock hazard
Page 3 - PHMSA PL32933 Practice 150Q
, CORRECT ANSWER: C. AC/DC interference mitigation? AC power lines induces voltage mitigation grounding zinc ribbon decoupled DC stray
transit bonds drainage - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: AC/DC interference mitigation? AC power lines induces voltage mitigation grounding zinc ribbon decoupled DC stray transit bonds drainage - per PHMSA 49
CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 7: CIPS DCVG for PL32933? CIPS close interval 2-5 ft finds low potentials DCVG voltage gradient finds coating holidays
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
C. Incorrect: Ignore AC interference no grounding shock hazard
D. CIPS DCVG for PL32933? CIPS close interval 2-5 ft finds low potentials DCVG voltage gradient finds coating holidays - per PHMSA 49 CFR 192
Subpart I 195 Subpart H NACE SP0169 SP0200
CORRECT ANSWER: D. CIPS DCVG for PL32933? CIPS close interval 2-5 ft finds low potentials DCVG voltage gradient finds coating holidays -
per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: CIPS DCVG for PL32933? CIPS close interval 2-5 ft finds low potentials DCVG voltage gradient finds coating holidays - per PHMSA 49 CFR 192 Subpart I 195
Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 8: Internal corrosion per 192.475 195.579? Water CO2 H2S O2 bacteria control dehydration inhibitor pigging coupon
monitoring sampling
A. Internal corrosion per 192.475 195.579? Water CO2 H2S O2 bacteria control dehydration inhibitor pigging coupon monitoring sampling - per PHMSA
49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
B. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
C. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
D. Incorrect: Ignore AC interference no grounding shock hazard
CORRECT ANSWER: A. Internal corrosion per 192.475 195.579? Water CO2 H2S O2 bacteria control dehydration inhibitor pigging coupon
monitoring sampling - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: Internal corrosion per 192.475 195.579? Water CO2 H2S O2 bacteria control dehydration inhibitor pigging coupon monitoring sampling - per PHMSA 49 CFR
192 Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 9: Corrosion records OQ per 192.453? Records life pipeline CP readings surveys OQ qualified persons corrosion tasks
PL32933
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. Corrosion records OQ per 192.453? Records life pipeline CP readings surveys OQ qualified persons corrosion tasks PL32933 - per PHMSA 49 CFR
192 Subpart I 195 Subpart H NACE SP0169 SP0200
C. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
D. Incorrect: Ignore AC interference no grounding shock hazard
CORRECT ANSWER: B. Corrosion records OQ per 192.453? Records life pipeline CP readings surveys OQ qualified persons corrosion tasks
PL32933 - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: Corrosion records OQ per 192.453? Records life pipeline CP readings surveys OQ qualified persons corrosion tasks PL32933 - per PHMSA 49 CFR 192
Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 10: Atmospheric corrosion per 192.479? Aboveground pipe coating painting inspection 3 years onshore yearly offshore
correction if pitting
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
C. Atmospheric corrosion per 192.479? Aboveground pipe coating painting inspection 3 years onshore yearly offshore correction if pitting - per PHMSA
49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
D. Incorrect: Ignore AC interference no grounding shock hazard
CORRECT ANSWER: C. Atmospheric corrosion per 192.479? Aboveground pipe coating painting inspection 3 years onshore yearly offshore
correction if pitting - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: Atmospheric corrosion per 192.479? Aboveground pipe coating painting inspection 3 years onshore yearly offshore correction if pitting - per PHMSA 49 CFR
192 Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Question 11: What is corrosion galvanic series pipeline steel? Corrosion oxidation Fe to Fe2+ anode galvanic series noble to active
steel active to copper
A. Incorrect: Abandon CP rely only on paint violates 192.455 mandatory CP
B. Incorrect: Uses -850 mV on without IR wrong reference violates NACE
C. Incorrect: Ignore AC interference no grounding shock hazard
D. What is corrosion galvanic series pipeline steel? Corrosion oxidation Fe to Fe2+ anode galvanic series noble to active steel active to copper - per
PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
CORRECT ANSWER: D. What is corrosion galvanic series pipeline steel? Corrosion oxidation Fe to Fe2+ anode galvanic series noble to active
steel active to copper - per PHMSA 49 CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200
RATIONALE:
Rationale: What is corrosion galvanic series pipeline steel? Corrosion oxidation Fe to Fe2+ anode galvanic series noble to active steel active to copper - per PHMSA 49
CFR 192 Subpart I 195 Subpart H NACE SP0169 SP0200. Per PHMSA corrosion control PL32933.
Page 4 - PHMSA PL32933 Practice 150Q
