Theory of Machine In a multiple V-belt drive, when a single belt is damaged, it is preferable to change the complete set to Ensure proper alignment Reduce vibration Ensure uniform loading Reduce slip Ensure proper alignment Reduce vibration Ensure uniform loading Reduce slip ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The radius of a friction circle for a shaft rotating inside a bearing is (where r = Radius of shaft, and tan φ = Coefficient of friction between the shaft and bearing) r tanφ (r/2) cosφ r cosφ r sinφ r tanφ (r/2) cosφ r cosφ r sinφ ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The natural frequency of free torsional vibrations of a shaft is equal to (where q = Torsional stiffness of the shaft, and I = Mass moment of inertia of the disc attached at the end of a shaft) 2π qI 2π. √(q/I) 1/2π (1/2π). √(q/I) 2π qI 2π. √(q/I) 1/2π (1/2π). √(q/I) ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In S.H.M., the velocity vector w.r.t. displacement vector Leads by 90° Lags by 90° Leads by 180° Are in phase Leads by 90° Lags by 90° Leads by 180° Are in phase ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The inversion of a mechanism is Turning its upside down Obtained by fixing different links in a kinematic chain Obtained by reversing the input and output motion Changing of a higher pair to a lower pair Turning its upside down Obtained by fixing different links in a kinematic chain Obtained by reversing the input and output motion Changing of a higher pair to a lower pair ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, θ = Angle of inclination of crank with the line of stroke, and n = Ratio of the length of connecting rod to radius of crank) m.ω².r sinθ m.ω².r cosθ m.ω².r (cos 2θ/n) m.ω².r (sin 2θ/n) m.ω².r sinθ m.ω².r cosθ m.ω².r (cos 2θ/n) m.ω².r (sin 2θ/n) ANSWER DOWNLOAD EXAMIANS APP
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