Machine Design Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σt = Permissible tensile stress for plate material) p.t.σt (p - d) t.σt p.d.σt p.t.σt (p - d) t.σt p.d.σt ANSWER DOWNLOAD EXAMIANS APP
Machine Design The ball bearings are provided with a cage To maintain the balls at a fixed distance apart To prevent the lubricant from flowing out To reduce friction To facilitate slipping of balls To maintain the balls at a fixed distance apart To prevent the lubricant from flowing out To reduce friction To facilitate slipping of balls ANSWER DOWNLOAD EXAMIANS APP
Machine Design When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is A combination of bending stress and direct shear stress Direct shear stress only A combination of torsional shear stress and bending Bending stress only A combination of bending stress and direct shear stress Direct shear stress only A combination of torsional shear stress and bending Bending stress only ANSWER DOWNLOAD EXAMIANS APP
Machine Design Shaft coupling is used in machinery to Introduce mechanical flexibility Reduce the transmission of shock loads All of these Introduce protection against over loads Introduce mechanical flexibility Reduce the transmission of shock loads All of these Introduce protection against over loads ANSWER DOWNLOAD EXAMIANS APP
Machine Design In a band and block brake, the ratio of tensions on the tight and slack sides of band is given by (where μ = Coefficient of friction between the blocks and the drum, θ = Semi-angle of each block subtending at the centre of drum, and n = Number of blocks) T₁/T₂ = (μθ)n T₁/T₂ = [(1 + μ tanθ)/ (1 - μ tanθ)]n T₁/T₂ = [(1 - μ tanθ)/ (1 + μ tanθ)]n T₁/T₂ = μθ × n T₁/T₂ = (μθ)n T₁/T₂ = [(1 + μ tanθ)/ (1 - μ tanθ)]n T₁/T₂ = [(1 - μ tanθ)/ (1 + μ tanθ)]n T₁/T₂ = μθ × n ANSWER DOWNLOAD EXAMIANS APP
Machine Design When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring) (8WD/ πd3) × K (WD/ πd3) × K (2WD/ πd3) × K (4WD/ πd3) × K (8WD/ πd3) × K (WD/ πd3) × K (2WD/ πd3) × K (4WD/ πd3) × K ANSWER DOWNLOAD EXAMIANS APP
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