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.τu t.τu π/4 × d² × tτu πd.t.τu π/4 × d².τu t.τu π/4 × d² × tτu πd.t.τu ANSWER DOWNLOAD EXAMIANS APP
Machine Design A plate with an elliptical hole in the centre, with semi-major axis (a) perpendicular to the direction of loading and semi-minor axis (b) along the direction of loading, is subjected to a pull P. The maximum stress induced at the edge of the hole is equal to (where σ = Stress for a plate with no hole i.e. nominal stress) σ [1 + (b/3a)] σ [1 + (b/2a)] σ [1 + (3a/b)] σ [1 + (2a/b)] σ [1 + (b/3a)] σ [1 + (b/2a)] σ [1 + (3a/b)] σ [1 + (2a/b)] ANSWER DOWNLOAD EXAMIANS APP
Machine Design Pick up wrong statement. Fatigue strength can be increased by Hot working Grinding and lapping surface Shot peening Cold working Hot working Grinding and lapping surface Shot peening Cold working ANSWER DOWNLOAD EXAMIANS APP
Machine Design The property of a material which enables it to be drawn into wires with the application of a tensile force, is called Plasticity Ductility Malleability Elasticity Plasticity Ductility Malleability Elasticity ANSWER DOWNLOAD EXAMIANS APP
Machine Design When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be Buttress threads Acme threads Square threads Knuckle threads Buttress threads Acme threads Square threads Knuckle threads ANSWER DOWNLOAD EXAMIANS APP
Machine Design The ratio of driving tensions in V-belt drives is __________ flat belt drives. Equal to sin α times less than sin α times more than cosec α times more than Equal to sin α times less than sin α times more than cosec α times more than ANSWER DOWNLOAD EXAMIANS APP
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