NACE CP2 QUIZ 1 MULTIPLE EXAM The elements of a corrosion cell include which of the following? 1. Anode 2. Cathode 3. Electrolyte 4. Electronic Path Answer -All of the Above Faraday's Law calculates the A. potential of a metal in seawater B. potential of a metal in the metal ion solution C. metal lost based on the resistance D. metal lost due to current over tim e Answer -D. metal Lost due to current over time An environment where cathodic protection is NOT effective is A. liquid B. soil C. atmospherically exposed surface D. steel in concrete Answer -C. atmospherically exposed surface Reference electrodes include which of the following? 1. Copper -copper sulfate 2. Hydrogen 3. Calomel 4. Silver -silver chloride Answer -All of the above The stability of a copper -copper sulfate reference e lectrode does not vary with A. temperature B. exposure to sunlight C. an unsaturated solution of copper ions D. a saturated solution of copper ions Answer -D. a saturated solution of copper ions The cathodic protection criteria for steel includes w hich of the following? 1. A potential of -850 mVCSE or more negative with current applied after IR drop is considered 2. A polarized potential of -850 mVCSE or more negative 3. polarization of 100 mV or greater 4. A polarized potential of -790 mV AgAgCl o r more negative Answer -All of the above If a potential of -484 mV is measured with respect to a hydrogen electrode, what is a the potential to copper -copper sulfate? A. -168 mVCSE B. -316 mVCSE C. -800 mVCSE D. -1116 mVCSE Answer -C. -800 mV CSE E1 + (CF1) = E2 + (CF2) -484 mVCSE + 0 = E2 + (316 mV) E2 = -800 mVCSE When cathodic protection is applied to a corroding steel surface, it shifts the corrosion cell potential as follows: A. No change in potential B. Cathode more negative C. Cathode more positive D. Anode more positive Answer -B. Cathode more negative Cathodic protection polarizes A. the open circuit potential of the structure anode to the structure cathode potential B. the open circuit potential of the structure cathode to the structure anode potential C. the open circuit potential of the structure c athode to the CP anode potential D. the open circuit CP anode potential to the structure cathode potential Answer -B. the open circuit potential of the structure cathode to the structure anode potential If a digital meter displays a negative value w hile measuring a voltage across a resistor, it indicated that the A. current is from the positive to the negative meter connection B. current is from the negative to the positive meter connection C. meter is reading incorrectly D. meter scale should be ch anged Answer -B. current is from negative to positive meter connection Polarization occurs A. at the anode surface only B. at the cathode surface only C. at the anode and cathode surfaces D. in the metallic path Answer -C. at the anode and cathode surfaces
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller saraciousstuvia. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
