2-13. Which of the following coatings is best suited
for use as a corrosion inhibitor on exposed
steel pipelines suspended along piers?
2-14. In the galvanic anode method of cathodic
protection for steel structures, the structure is
established as the cathode in a dissimilar metal
galvanic cell by the use of
3. Magnesium cathode
2-15. The impressed current method of cathodic
protection is different from the galvanic anode
method in which of the following ways?
An electrical source is not required
A direct current is applied from anode to
3. An anode is unnecessary
A cathode may be used for the anode
A. Holiday Leak Detector
B. Resistivity Meter
C. Volt-Millivolt Meter
IN ANSWERING QUESTIONS 2-16 THROUGH 2-20,
REFER TO FIGURE 2A.
2-16. Locate imperfections in pipe coatings:
2-17. Measure the structure-to-soil potential of a
given cathodic protection system:
2-18. Locate an area suitable for an anode bed:
2-19. Measure the corrosive susceptibility of a given
2-20. Determine the variation in
potential of galvanic anodes:
2-21. All automatic sprinkler systems have which of
the following characteristics in common?
Each of the above
2-22. What type of automatic sprinkler system is
most commonly used?
2-23. In a
Low-differential dry pipe
Latched-clapper dry pipe
dry-pipe system, the pipes can contain air
what other element under pressure?