Chapter 7

Question 1

_________ is any interruption on a metallic structure

caused by stray current.

Answer 1

Interference

Question 2

______ stray currents have the most pronounced effect on corrosion

Answer 2

direct

Question 3

Stray current sources include

Answer 3

CP systems, electric powered mass transit, welding where , electric transmission lines, High voltage DC transmission systems, telluric currents

Question 4

______ stray current vary in magnitiude and often direction

Answer 4

dynamic

Question 5

_________ currents are naturally occurring stray currents caused by the disturbances in the earths magnetic field by sunspot activity

Answer 5

telluric

Question 6

_______ stray currents maintain constant magnitude and direction.

Answer 6

steady state or static

examples include cp systems and

Question 7

_________ stray currents are manifested by fluctuations in structure to electrolyte potentials

Answer 7

dynamic stray currents

Question 8

__________ provide metallic path between the affected structure and the source of the stray current

Answer 8

mitigation bonds