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WorksheetsME222-2
Total questions: 10
Worksheet time: 5mins
A sheet of 30 mm thickness is rolled to 20 mm thickness by 650 mm diameter rolls rotating at 120 rpm. Calculate the roll strip contact length.
57 mm
55 mm
77 mm
67 mm
A 5 mm thick metal sheet is to be bent at an angle of one radian with a bend radius of 120 mm. Determine the bend allowance for stretch factor 0.6.
123 mm
323 mm
113 mm
223 mm
Cold working of steel is defined as working
at its recrystallization temperature
above its recrystallization temperature
below its recrystallization temperature
at two-thirds of the melting temperature of the
metal
A shell of 100 mm diameter and 100 mm height with the corner radius of 0.4 mm is to be produced by cup drawing. The required blank diameter is
(a) 118 mm
(b) 161 mm
(c) 224 mm
(d) 312 mm
A brass billet is to be extruded from its initial diameter of 100 mm to a final diameter of 50 mm. The working temperature of 700◦C and the extrusion constant is 250 MPa. The force required for extrusion is
(a) 5.44 MN
(b) 2.72 MN
(c) 1.36 MN
(d) 0.36 MN
A metal disc of 20 mm diameter is to be punched from a sheet of 2 mm thickness. The punch and the die clearance is 3%. The required punch diameter is
(a) 19.88 mm
(b) 19.94 mm
(c) 20.06 mm
(d) 20.12 mm
(a) 22.6 kN
(b) 37.7 kN
(c) 61.6 kN
(d) 94.3 kN
n a rolling process, sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 600 mm and it rotates at 100 rpm. The roll strip contact length will be
5 mm
39 mm
78 mm
120 mm
A 2 mm thick metal sheet is to be bent at an angle of one radian with a bend radius of 100 mm. If the stretch factor is 0.5, the bend allowance is
(a) 99 mm
(b) 100 mm
(c) 101 mm
(d) 102 mm
171.3%
271.3%
179.3%
121.3%
