MCQ'S ON ROLLING & EXTRUSION: HOT & COLD ROLLING, Types OF ROLLING MILL, Direct & Indirect extrusion

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#HOT & COLD ROLLING: It's important to note that the main difference between hot rolled and cold rolled steel is one of process. “Hot rolling” refers to processing done with heat. “Cold rolling” refers to processes done at or near room temperature. It may seem obvious, but some types of steel are better suited for certain applications.
Following are the 6 different types of rolling mills used in many industries:
#Twohighrollingmills.
#Threehighrollingmills.
#Fourhighrollingmills.
#Clusterrollingmills.
#Planetaryrollingmills.
#Tendem
#Continuousmills.
Direct & Indirect extrusion: In the direct process, as described above, the die is stationary and the press ram applies pressure on to the billet. In the indirect method, the ram carries the die and applies pressure on to the stationary billet, in the opposite direction of extrusion

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