Nace cp 2 quiz 2 stuvia Study guides, Class notes & Summaries

A mitigation bond may cause more problems under which of the following conditions? 1. Where the interfering structure bond point is more electropositive than the interfered with structure 2. Where the interfering structure bond point is more more electronegative than the interfered with structure 3. Where there are more than one, or changing, current discharge points 4. Where the interfering structure bond point potential varies from being more electronegative to more electropositive than ...

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A structure-to-electrolyte potential measures the potential difference between A. Two different structures acting as electrodes B. The structure and a standard reference electrode C. The structure and the anodes D. Two different points on the structure - ANSWER B. The structure and a standard reference electrode If 5.0 A of battery current passes through the outside leads of a 4-wire current span spaced at 30 m (100 ft), resulting in a voltage drop of 5.0 mV with the test current applie...

AC voltages on pipelines do NOT result from A. resistive (conductive) coupling B. electrostatic (capacitive) coupling C. electromagnetic induction coupling D. thermodynamic coupling - ANSWER D. Thermodynamic coupling On a cathodically protected pipeline, AC corrosion can be expected at which current densities? 1. 30 mA/m2 2. 10 A/m2 3. 110 A/m2 4. 200 A/m2 - ANSWER 3 and 4 A close interval potential survey is a test where structure-to-electrolyte potentials are measured

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 time - ANSWER D. metal Lost due to current over time An environment where cathodic protection is NOT effective is A. liquid B. soil C. atmospher...

A galvanic anode system is NOT normally suitable in which of the following conditions? A. When a small amount of current is required B. In high soil resistivity C. For localized protection D. For interference mitigation - ANSWER B. In high soil resistivity Proper operation of a rectifier can be confirmed by which of the following? 1. DC current output 2. DC voltage output 3. Tap setting 4. Potential at a control point - ANSWER All of the above The purpose of the galvanic anode ...