Machine Design For a shoe brake, the equivalent coefficient of friction is equal to (where μ = Actual coefficient of friction, and θ = Semi-block angle) 2μ sinθ/(θ + sinθ) μ sinθ/(2θ + sin 2θ) 4μ sinθ/(2θ + sin 2θ) 4μ sinθ/(θ + sinθ) 2μ sinθ/(θ + sinθ) μ sinθ/(2θ + sin 2θ) 4μ sinθ/(2θ + sin 2θ) 4μ sinθ/(θ + sinθ) ANSWER DOWNLOAD EXAMIANS APP
Machine Design A tapered key which fits in a key way in the hub and is flat on the shaft, is known as Feather key Wood ruff key Flat saddle key Gib-head key Feather key Wood ruff key Flat saddle key Gib-head key ANSWER DOWNLOAD EXAMIANS APP
Machine Design A key capable of tilting in a recess milled out in a shaft is known as Flat saddle key Hollow saddle key Feather key Woodruff key Flat saddle key Hollow saddle key Feather key Woodruff key ANSWER DOWNLOAD EXAMIANS APP
Machine Design In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing Is maximum at zero speed and decreases monotonically with increase in speed Becomes minimum at an optimum speed and then increases with further increase in speed Remains constant at all speeds Is minimum at zero speed and increases monotonically with increase in speed Is maximum at zero speed and decreases monotonically with increase in speed Becomes minimum at an optimum speed and then increases with further increase in speed Remains constant at all speeds Is minimum at zero speed and increases monotonically with increase in speed ANSWER DOWNLOAD EXAMIANS APP
Machine Design Shaft coupling is used in machinery to 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 Introduce mechanical flexibility ANSWER DOWNLOAD EXAMIANS APP
Machine Design A screw is said to be over hauling screw, if the Friction angle is equal to helix angle Efficiency of screw is 100% Friction angle is less than helix angle Friction angle is more than helix angle Friction angle is equal to helix angle Efficiency of screw is 100% Friction angle is less than helix angle Friction angle is more than helix angle ANSWER DOWNLOAD EXAMIANS APP
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