1. In 1915 , an ocean yacht was built, the hull being made of Monel, was riveted to a steel frame with iron rivets. The yacht did not last long because all the rivets sprang. She literally fell apart! Explain why. (Monel is a corrosion resistant nickel-copper alloy). 2. In older houses one will often find steel waterpiping whereas copper tubing is now generally used. While carrying out renovations, plumbers often interconnect the steel piping with copper tubing. Is this sound practice? Explain. 3. Adjoining lengths of iron watermains are often connected with each other by means of a copper strip to ensure good electrical conductivity throughout the entire pipeline (a Canadian patent). After installation and before the pipe is covered with earth, the connection is carefully covered with an insulating type of paint. Is this sound practice? Explain. 4. A surgeon is having difficulty trying to get a Steinmann pin to fit in a treatment for a tibial fracture. In a last ditch effort to finish the operation, he bends the pin to make it go in. What corrosion problems might this cause