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) (1/2π). √(q/I) 1/2π 2π. √(q/I) 2π qI (1/2π). √(q/I) 1/2π 2π. √(q/I) 2π qI ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Whirling speed of the shaft is the speed at which Shaft tends to vibrate vigorously in transverse direction Shaft tends to vibrate in longitudinal direction Combination of transverse and longitudinal vibration occurs Torsional vibrations occur Shaft tends to vibrate vigorously in transverse direction Shaft tends to vibrate in longitudinal direction Combination of transverse and longitudinal vibration occurs Torsional vibrations occur ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The danger of breakage and vibration is maximum Below the critical speed None of these Above the critical speed Near the critical speed Below the critical speed None of these Above the critical speed Near the critical speed ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Angle of dwell of cam is defined as the angle Through which the cam rotates during the period in which the follower remains in the highest position Of rotation of the cam for definite displacement of the follower Moved by the cam from the instant the follower begins to rise, till it reaches its highest position During which the follower returns to its initial position Through which the cam rotates during the period in which the follower remains in the highest position Of rotation of the cam for definite displacement of the follower Moved by the cam from the instant the follower begins to rise, till it reaches its highest position During which the follower returns to its initial position ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine The secondary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is Both (A) and (B) 0° and 90° None of these 180° and 360° Both (A) and (B) 0° and 90° None of these 180° and 360° ANSWER DOWNLOAD EXAMIANS APP
Theory of Machine Whitworth quick return mechanism is obtained by inversion of Kinematic chain Slider crank mechanism Roller cam mechanism Five link mechanism Kinematic chain Slider crank mechanism Roller cam mechanism Five link mechanism ANSWER DOWNLOAD EXAMIANS APP
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