Machine Design When a hole of diameter ‘d’ is punched in a metal of thickness 't', then the force required to punch a hole is equal to (where τu = Ultimate shear strength of the material of the plate) π/4 × d² × tτu πd.t.τu π/4 × d².τu t.τu π/4 × d² × tτu πd.t.τu π/4 × d².τu t.τu ANSWER DOWNLOAD EXAMIANS APP
Machine Design The modulus of elasticity for mild steel is approximately equal to 100 kN/mm² 80 kN/mm² 110 kN/mm² 210 kN/mm² 100 kN/mm² 80 kN/mm² 110 kN/mm² 210 kN/mm² ANSWER DOWNLOAD EXAMIANS APP
Machine Design When a circular beam of diameter d is subjected to a shear force F, the maximum shear stress induced will be 8F/ πd² 16F/ 3πd² 4F/ πd² 6F/ πd² 8F/ πd² 16F/ 3πd² 4F/ πd² 6F/ πd² ANSWER DOWNLOAD EXAMIANS APP
Machine Design The pitch diameter is the __________ diameter of an external or internal screw thread. Largest Effective None of these Smallest Largest Effective None of these Smallest ANSWER DOWNLOAD EXAMIANS APP
Machine Design The plasticity is the property of a material which enables it to Resist fracture due to high impact loads Retain deformation produced under load permanently Draw into wires by the application of a tensile force Regain its original shape after deformation when the external forces are removed Resist fracture due to high impact loads Retain deformation produced under load permanently Draw into wires by the application of a tensile force Regain its original shape after deformation when the external forces are removed ANSWER DOWNLOAD EXAMIANS APP
Machine Design In order to avoid tearing of the plate at edge, the distance from the center line of the rivet hole to the nearest edge of the plate in terms of dia. of rivet d should be equal to 1.5 d 1.75 d 1.25 d 1 d 1.5 d 1.75 d 1.25 d 1 d ANSWER DOWNLOAD EXAMIANS APP
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