Theory of Machine In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction) P = W tan(φ - α) P = W tan(α - φ) P = W tan(α + φ) P = W cos(α + φ) P = W tan(φ - α) P = W tan(α - φ) P = W tan(α + φ) P = W cos(α + φ) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The inversion of a mechanism is Turning its upside down Changing of a higher pair to a lower pair Obtained by reversing the input and output motion Obtained by fixing different links in a kinematic chain Turning its upside down Changing of a higher pair to a lower pair Obtained by reversing the input and output motion Obtained by fixing different links in a kinematic chain ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The maximum efficiency of spiral gears is (where θ = Shaft angle, and φ = Friction angle) cos (θ - φ) + 1/ sin (θ + φ) + 1 sin (θ + φ) + 1/ cos (θ - φ) + 1 cos (θ - φ) + 1/ cos (θ + φ) + 1 cos (θ + φ) + 1/ cos (θ - φ) + 1 cos (θ - φ) + 1/ sin (θ + φ) + 1 sin (θ + φ) + 1/ cos (θ - φ) + 1 cos (θ - φ) + 1/ cos (θ + φ) + 1 cos (θ + φ) + 1/ cos (θ - φ) + 1 ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A slider crank chain consists of following numbers of turning and sliding pairs 4, 0 2, 2 3, 1 1, 3 4, 0 2, 2 3, 1 1, 3 ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine If ω/ωn = 2, where co is the frequency of excitation and ωn is the natural frequency of vibrations, then the transmissibility of vibration will the 1 1.5 0.5 2 1 1.5 0.5 2 ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine When the two elements of a pair have __________ when in motion, it is said to a lower pair. Surface contact Body contact None of these Line or point contact Surface contact Body contact None of these Line or point contact ANSWER DOWNLOAD EXAMIANS APP
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