EMMF_Test_no_1

Which of the following metal forming technologies belong among so-called BULK FORMING?

• Forging, rolling and bending

• Shearing, bending and extrusion

• Rolling, extrusion and deep-drawing

• Extrusion, rolling and forging

What is a proper name of such material behaviour during the deep-drawing?

• Galling

• Wrinkling

• Earing

• Tearing

What type of the extrusion technology is shown in the figure?

• Forward extrusion

• Backward extrusion

• Combined extrusion

• Radial extrusion

Which of the following equations is the correct one for the engineering stress?

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Which of the following equations are the correct ones for the true strain?

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What does this equation stand for?

• True stress

• Engineering strain

• Engineering stress

• True strain

What type of the diagram from the static tensile test is shown in the figure?

• Engineering diagram

• True diagram

• Working diagram

• Nominal diagram

Which type of the yield behavoir is shown in figure?

• Proof yield strength

• Homogeneous ductility

• Yield strength Re

• Aged material

If the static tensile test is carried out under the same conditions for deep-drawing material (temperature, strain rate, geometry of samples, etc.), which values of ductility will have the highest value?

• A30mm

• A50mm

• A80mm

• A100mm

Which of the following states of stress is the correct one for the equi-biaxial stretching?

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