KERALA UNIVERSITY Class 6 dynamics of machinery Question Paper 2013

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Sample Questions

A vibrating system consists of a mass of 50 kg , a spring with a stiffness of $30 \mathrm{kN} / \mathrm{m}$ and a damper. The damping provided is only $20 \%$ of the critical value. Determine (a) Damping factor, (b) critical damping coefficient, (c) ...
Four masses $A, B, C$ and $D$ carried by a rotating shaft at radii $80 \mathrm{~mm}, 100 \mathrm{~mm}$, 160 mm and 120 mm respectively are completely balanced. Masses of $B, C$ and D are $8 \mathrm{~kg}, 4 \mathrm{~kg}$ and 3 kg respectively. Determi...
(b) The turning moment diagram for a petrol engine is drawn to a vertical scale of $1 \mathrm{~mm}=50014 \mathrm{Nm}$ and a horizontal scale of $1 \mathrm{~mm}=3^{\circ}$. the turning moment diagram repeats itself after every half revolution of the c...
A slider crank mechanism with the following dimensions is acted upon by a force $F=2 \mathrm{kN}$ at $B$ as shown in the figure. $O A=100 \mathrm{~mm}, A B=450 \mathrm{~mm}$. determine the input torque $T$ on the link $O A$ for the static equilibrium...
Each arm of a Porter governor is 200 mm long and is pivoted on the axis of the governor. The radii of rotation of the ball at the minimum and maximum speeds are 120 mm and 160 mm respectively. The mass of the sleeve is 24 kg and each ball is 4 kg . F...