Question: - Explain the Concept of mean temperature of heat addition.

Grey cast iron, which contains between 2.5 and 4% carbon, has all or most of its carbon is uncombined in forms graphite flakes when it cools and solidifies from its molten state. True or false.

Pure aluminum resist corrosion better than aluminum alloy's. Therefore when corrosion is a design problem, pure aluminum is clad to the surfaces of the aluminum alloy. The cladding layers and core or bonded or welded together by heat and pressure of a rolling operation. True or false.

10/. In _________ process, heating is carried out 20°C above the lower critical temperature and then cool slowly in furnace for the eutectoid steel. a. Annealing b. Hardening c. Normalizing d. Tempering