Question1: When actual temperature of bulk liquid is between Tliguidus and Tsoliduse the phenomena will be: A. Unidirectional solidification B. Two-phase solidification C. Volumic solidification D. Unidirectional and volumic solidification Question2: During conventional solidification process the secondary dendrite spacing is: A. Almost unchanged B. Increase C. Decrease D. Increase firstly and the decrease Question3: Based on the figure one can say that if the growth rate is between 102 and 1mm/s : A. The solidification morphology is always cells. B. The solidification morphology is always columnar dendrite. C. The solidification morphology is always equiaxed dendrite. D. All above answers are incorrect. Question 4: During eutectic solidification the interface between phases is usually: A. Close-packed plane B. The plan having high energy C. The plan having low energy D. Any plan Question 5: in figure below, Case b describes: A. Concentration distribution of element B at solid/liquid interface in front of and phases B. Concentration distribution of element A at solid/liquid interface in front of and phases C. Concentration distribution of element B at / interface D. Concentration distribution of element A at / interface Question 6: if the phase diagram is like a picture below, one can predict that the eutectic will have: A. Lamellar structure B. Fiber(rod-like) structure C. Normal structure D. Anomalous structure Question 7 The model, explaining the diffusion-coupled growth of lamellar eutectics suggests that: A. Solid/liquid interface is isothermal ( /liquid and / liquid interfaces have the same temperature) B. /liquid interface has higher temperature than / liquid C. / liquid interface has lower temperature than / liquid D. It still depends on other factors