Power Engineering 2a2 154 Correctly Answered Questions Latest Update

Brinell Hardness Test {Ans: Uses the principle of a constant load applied for a period of time, using an indentor with a predetermined diameter (usually 10 mm). It can also be described as bulk hardness testing, since it averages out small imperfections.}Iron-carbon equilibrium in steel is determined by what? {Ans: -Initial concentration of carbon in the ferrite mixture -Temperature -Cooling rate -Presence of other alloying metals}The rate at which galvanic corrosion depends on what? {Ans: - The difference in electrical potential between the two metals (higher potential difference means higher corrosion rate) - The type and concentration of the electrolyte - The distance between the two metals (less distance means higher corrosion) - The ratio of cathode area to anode area (a higher cathode to anode ratio generally results in more severe corrosion)}What is a second type of visual inspection and what are some criteria for conducting visual inspections? {Ans: The second type of visual inspection is remote examination with the use of an electronic video systems. The system must have a resolution capability at least equivalent to that obtained with direct visual observation. -Access allowing placement of the eye within 610 mm of the surface