Theory of Machine In under damped vibrating system, the amplitude of vibration Increases exponentially with time Increases linearly with time Decreases linearly with time Decreases exponentially with time Increases exponentially with time Increases linearly with time Decreases linearly with time Decreases exponentially with time ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The periodic time is given by (where ω = Angular velocity of the particle in rad/s) π/ω 2π/ω ω/2π ω × 2π π/ω 2π/ω ω/2π ω × 2π 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 shafts are rotating at very high speeds The system is unbalanced Resonance is caused due to the heavy mass of the rotor Bearing centre line coincides with the axis The shafts are rotating at very high speeds The system is unbalanced Resonance is caused due to the heavy mass of the rotor ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine A flywheel is fitted to the crankshaft of an engine having W as the amount of indicated work per revolution and permissible limits of coefficient of fluctuation of energy and speed as CE and CS respectively. The kinetic energy of the flywheel is given by 2 W CE / CS W CS / 2CE W CE / 2CS W CE / CS 2 W CE / CS W CS / 2CE W CE / 2CS W CE / CS ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Cam angle is defined as the angle Through which, the cam rotates during the period in which the follower remains in the highest position During which the follower returns to its initial position Moved by the cam from the instant the follower begins to rise, till it reaches its highest position Of rotation of the cam for a definite displacement of the follower Through which, the cam rotates during the period in which the follower remains in the highest position During which the follower returns to its initial position Moved by the cam from the instant the follower begins to rise, till it reaches its highest position Of rotation of the cam for a definite displacement of the follower ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine In a pantograph, all the pairs are Sliding pairs Spherical pairs Self-closed pairs Turning pairs Sliding pairs Spherical pairs Self-closed pairs Turning pairs ANSWER DOWNLOAD EXAMIANS APP
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