Explanation: Continuous cooling transformation diagrams are drawn for mainly steels and steel of constant composition at a time is taken.

Explanation: In a continuous cooling transformation diagrams, the material is cooled at a certain rate instead of heating and then cooling it rapidly and then maintaining a constant temperature in case of TTT diagrams.

Explanation: There are two types of continuous cooling transformation diagrams which can be drawn. In the two type, some factors are changed to obtain a different curve.

Explanation: CCT diagrams are determined by measuring magnetic permeability and specific volume during continuous cooling.

Explanation: When there is a slope change observed in a continuous cooling transformation diagram, it signifies that there is a change in phase occurring at that point.

Explanation: The above statement is false. Jominy end quench test apart from its use in finding out hardenability of a material, it is also used for plotting type 1 CCT diagram.

Explanation: Scheil gave a method which can be used to calculate the transformation temperature of a material during continuous cooling of the material. The concept is called Scheil’s concept of fractional nucleation.

Explanation: The above statement is true. In a continuous cooling transformation diagrams, the critical cooling rate is less than that prescribed in TTT diagrams.