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 cos(α + φ) P = W tan(α - φ) P = W tan(φ - α) P = W tan(α + φ) P = W cos(α + φ) P = W tan(α - φ) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Open pairs are those which have Point or line contact between the two elements when in motion Two elements that permit relative motion Elements of pairs not held together mechanically Surface contact between the two elements when in motion Point or line contact between the two elements when in motion Two elements that permit relative motion Elements of pairs not held together mechanically Surface contact between the two elements when in motion ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The example of successfully constrained motion is a All of these Motion of an I.C. engine valve Motion of the shaft between a footstep bearing Piston reciprocating inside an engine cylinder All of these Motion of an I.C. engine valve Motion of the shaft between a footstep bearing Piston reciprocating inside an engine cylinder ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Klein's construction gives a graphic construction for Velocity polygon Four bar chain mechanism Slider-crank mechanism Acceleration polygon Velocity polygon Four bar chain mechanism Slider-crank mechanism Acceleration polygon ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The number of links in pantograph mechanism is equal to 5 2 3 4 5 2 3 4 ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In a simple harmonic motion, the velocity vector with respect to displacement vector Leads by 180° Is in phase Leads by 90° Lags by 90° Leads by 180° Is in phase Leads by 90° Lags by 90° ANSWER DOWNLOAD EXAMIANS APP
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