29) The frequency of damped vibrations with viscous damping is __________ the frequency of undamped vibrations.

30) Whitworth quick return motion mechanism consists of three turning pairs and one sliding pair.

31) The rotor of a ship rotates in clockwise direction when viewed from stern and the ship takes a right turn. The effect of gyroscopic couple acting on it will be to raise the stern and lower the bow.

32) The sliding pairs, turning pairs and screw pairs form lower pairs.

33) When a particle moves round the circumference of a circle of radius r with ? rad/s, then its maximum acceleration is ?²r.