What are the four elements of corrosion cell ? Give brief description for each of the element.

What type of corrosion is the tarnishing of silverware? O a. Uniform attack O b. Crevice corrosion O c. Pitting O d. Galvanic corrosion

7 -------centrifuge is the most suitable for separation of non-friable crystals. Tubular bowl Disc-bowl Perforated horizontal basket continuous Suspended batch basket

Describe about the Electro-osmosis.

None

what applications does packed column have?

8) What are the changes in relative density in different stages of sintering?

Layers %R AT Surface Ts 1. Inside air film 20 0.037 2. hardboard, medium density 25mm 0.073 3. concrete blocks, rectangular core:lightweight aggregate 2 core 200mm 0.118 4. expanded poystyrene molded beads 100mm 0.764 5. Outside air film in vented cavity 0.009 What is the AT of the above shown wall for layer 4 (expanded polystyrene molded beads 100mm)? The inside air temperature is +20°C, and the outside air temperature is -4°C. The units for your answer are °C, and your answer is correct if it is within 10% of the correct answer.

7 ---centrifuge is the most suitable for separation of non-friable crystals. Tubular bowl Disc-bowl Perforated horizontal basket continuous Suspended batch basket

4. How do coarse and fine Pearlite differ and how is each formed?