Bissoy.com
Doctors Medicines MCQs Q&A

A steel bar of the initial cross-section area of 200 mm2 is extruded with extrusion ratio of 8. Find the final cross-sectional area of the bar?

A steel bar of the initial cross-section area of 200 mm2 is extruded with extrusion ratio of 8. Find the final cross-sectional area of the bar? Correct Answer 25 mm2

The extrusion ratio is defined as: -> R=Initial area/final area -> 8=200/final area -> Final area=25 mm2 So, the final cross-sectional area is 25 mm2.

Related Questions

A steel bar of the initial diameter of 20 mm is extruded with extrusion ratio of 8. Find the final diameter of the bar?
Find the extrusion pressure for the metal having extrusion constant 5*109. The initial and final cross-sectional area is 50 mm2 and 10 mm2?
The extrusion ratio for hot extrusion is much more than the extrusion ratio for cold extrusion.
Calculate ultimate moment and shear of effective span is 30m, live load is 9kn/m, dead load excluding self weight is 2kn/m, load factors for dead load is 1.4 for live load is 1.6 cube strength of concrete fcu is 50n/mm2 cube strength at transfer is fci is 35n/mm2, tensile strength of concrete Ec is 34kn/mm2 loss ratio ɳ is 0.85 and 8mm diameter high tensile strength fpu is 1500n/mm2 are available for use and the modulus of elasticity of high tensile wires is 200kn/mm2?
Find the Permissible stresses and range of stresses for class 1 structure fcu = 50n/mm2, fck = 35n/mm2 according to BS: 8110 recommendations for fcu = 50n/mm2 and fci = 35n/mm2,fct = 0.5fci = 17.5n/mm2?
The brittle material is extruded in the hydrostatic pressure extrusion process. Whereas ductile metal can be extruded through normal operations.
A steel and a copper bar are joined end to end. The area of the steel bar is half the area of the copper bar. Their lengths are equal to 10cm each. Temperature of free ends of steel & copper rod are 0°C & 100°C respectively. KS = 50 J/smK & KC =384 J/smK. Calculate equivalent thermal conductivity of the combined bar.
The pressure required to maintain flow during indirect extrusion
P. decreases with decreasing rate of the billet
Q. Increases with increasing extrusion ratio
R. is independent of the length of the billet
S. is independent of the extrusion ratio
A round billet made of 70-30 brass is extruded at a temperature of 675°C. The billet diameter is 125 mm, and the diameter of the extrusion is 50 mm. Calculate the extrusion force required.
If the effective flow stress for extrusion is 100 MPa and the extrusion ratio is 4, then find the ideal extrusion pressure for the process?