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API 653 Aboveground Storage Tank Inspector Certification Exam

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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.

Sample Questions

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)?
-750 mV
-850 mV
-950 mV
-650 mV
Question 2
Which of the following is a type of cathodic protection system used on aboveground storage tank bottoms?
Anodic impressed current system
Sacrificial anode (galvanic) system
Passive inhibitor system
Electrolytic resistance system
Question 3
In an impressed current cathodic protection (ICCP) system for a tank bottom, what is the function of the rectifier?
To measure soil resistivity
To convert AC power to DC current for the CP circuit
To provide a sacrificial anode reaction
To isolate the tank from stray current
Question 4
According to API 653, when should cathodic protection be considered for the external bottom of an aboveground storage tank?
Only when the tank is over 100 ft in diameter
When corrosion on the tank bottom is detected or anticipated
Only during the initial construction phase
Only when the tank stores corrosive products
Question 5
What reference electrode is most commonly used for measuring cathodic protection potentials in soil environments?
Silver/silver chloride electrode
Zinc reference electrode
Copper/copper sulfate electrode (CSE)
Calomel electrode

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Additional Information

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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Frequently Asked Questions

This quiz contains a total of 170 practice questions carefully selected to test your knowledge on this subject.
Yes, you will have exactly 0 minutes to complete the exam. A countdown timer will be visible once you start.
Yes, you can retake this practice test as many times as you need. The questions and options may be randomized on subsequent attempts to ensure comprehensive learning.

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