In drawing process, compressive forces are used to reduce the cross section of the workpiece.   Select one: True False

A force stretches a wire by 4.0 mm. A third wire of the same material has the same length and twice the diameter as the first. How far will it be stretched by the same force?     4.0 mm     16 mm     8.0 mm     1.0 mm     2.0 mm

Gage length P (b) A tensile test is performed on an aluminum specimen 10 mm in diameter using a gauge length of 50 mm. When the tensile force, F, reaches a value of 20 kN, the distance between the gage marks increases by 0.122 mm. Point out whether the specimen diameter decreases or increases if the Poisson's ratio is 0.34.

At operating stress of 420MPa, the number of cycles to fail a specimen is 65 cycles. At operating stress of 360MPa, the number of cycles to fail the specimen is 390 cycles, and at operating stress of 130MPa, the number of cycles to fail the specimen is 11,900 cycles. A test sequence as follows is designed: first, operating stress of 420MPa for 7 cycles, second, operating stress of 360MPa for 65 cycles, and third, operating stress of 130MPa for 325 cycles. Determine at what number of cycle and which operating stress level the specimen would be expected to fail if the above sequence is repeated.