Theory of Machine The periodic time is given by (where ω = Angular velocity of the particle in rad/s) ω × 2π 2π/ω π/ω ω/2π ω × 2π 2π/ω π/ω ω/2π ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A kinematic chain is known as a mechanism when None of the links is fixed One of the links is fixed Two of the links are fixed None of these None of the links is fixed One of the links is fixed Two of the links are fixed None of these ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The rotating shafts tend to vibrate violently at whirling speeds because Bearing centre line coincides with the axis The system is unbalanced The shafts are rotating at very high speeds Resonance is caused due to the heavy mass of the rotor Bearing centre line coincides with the axis The system is unbalanced The shafts are rotating at very high speeds Resonance is caused due to the heavy mass of the rotor ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The frictional torque transmitted in a flat pivot bearing, assuming uniform wear, is(Where μ = Coefficient of friction, W=Load over the bearing, R=Radius of bearing) ¾μWR ²/₃ μWR μwr ½μWR ¾μWR ²/₃ μWR μwr ½μWR ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Crowning on pulleys helps In decreasing the slip of the belt For automatic adjustment of belt position so that belt runs centrally Increase belt and pulley life In increasing velocity ratio In decreasing the slip of the belt For automatic adjustment of belt position so that belt runs centrally Increase belt and pulley life In increasing velocity ratio ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine When a mass of a critically damped single degree of freedom system is deflected from its equilibrium position and released, then it will Return to equilibrium position without oscillation Oscillate with decreasing amplitude Oscillate with constant amplitude Oscillate with increasing time period Return to equilibrium position without oscillation Oscillate with decreasing amplitude Oscillate with constant amplitude Oscillate with increasing time period ANSWER DOWNLOAD EXAMIANS APP
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