Question 1
What is the minimum negative potential criterion for adequate cathodic protection of a steel tank bottom, as measured against a copper/copper sulfate reference electrode (CSE)?
Correct Answer:
-850 mV
Question 2
Which of the following is a type of cathodic protection system used on aboveground storage tank bottoms?
Correct Answer:
Sacrificial anode (galvanic) system
Question 3
In an impressed current cathodic protection (ICCP) system for a tank bottom, what is the function of the rectifier?
Correct Answer:
To convert AC power to DC current for the CP circuit
Question 4
According to API 653, when should cathodic protection be considered for the external bottom of an aboveground storage tank?
Correct Answer:
When corrosion on the tank bottom is detected or anticipated
Question 5
What reference electrode is most commonly used for measuring cathodic protection potentials in soil environments?
Correct Answer:
Copper/copper sulfate electrode (CSE)
Question 1
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About this Exam

Prepare with the API 653 Aboveground Storage Tank Inspector Certification Exam practice quiz. This question bank includes 170 questions covering professional, tank, corrosion, fitness-for-service, and cathodic. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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API 653 Aboveground Storage Tank Inspector Certification Exam

This practice set contains 170 questions from the matching question bank and focuses on professional, tank, corrosion, fitness-for-service, and cathodic. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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