81. In a system subjected to damped forced vibrations, the ratio of maximum displacement to the static deflection is known as
82. The sense of Coriolis component $$2\omega {\text{v}}$$ is same as that of the relative velocity vector $${\text{v}}$$ rotated at
83. The pressure angle of a cam is the angle between the direction of the follower motion and a normal to the
84. In a ball bearing, ball and bearing forms a
85. Angular acceleration of a link can be determined by dividing the
86. Whitworth quick return mechanism is obtained by inversion of
87. The retardation of a flat faced follower when it has contact at the apex of the nose of a circular arc cam, is given by (where OQ = Distance between the centre of circular flank and centre of nose)
88. The fundamental equation for correct steering is (where $$\varphi $$ and $$\alpha $$ = Angle through which the axis of the outer wheel and inner wheel turns respectively, c = Distance between the pivots of the front axles and d = Wheel base)
89. In a drag link quick return mechanism, the shortest link is always fixed. The sum of the shortest and longest link is
90. The coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.
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