a) Discuss three differences between destructive testing and nondestructive testing.
b) Liquid penetrant inspection is an improvement of visual inspection. How does liquid penetrant inspection improve visual inspection?
c) An instructor was tasked to check for through-wall leaks of a pressure vessel using dye penetrant inspection as shown in Fig: 2. With the aid of illustrations, discuss the basic steps of the inspection.
An invisible leak
Fig: 2