On their point of contact

At the centre of curvature

At the centre of circle

At the pin joint

**Rectilinear motion of piston is converted into rotary by****Ackermann steering gear consists of****When the pitching of a ship is __________ the effect of gyroscopic couple acting on it will be to move…****A universal joint is an example of****A cam with a roller follower would constitute following type of pair****The cam follower generally used in aircraft engines is****Which gear is used for connecting two coplanar and intersecting shafts?****The relation between the controlling force (Fc) and radius of rotation (r) for a stable spring controlled…****The acceleration of a particle moving with simple harmonic motion, at any instant is given by****When a body is subjected to transverse vibrations, the stress induced in a body will be****Two systems shall be dynamically equivalent when****The size of a gear is usually specified by****A spring controlled governor is said to be stable if the controlling force line when produced intersects…****The steering of a ship means****The Grubler's criterion for determining the degrees of freedom (n) of a mechanism having plane motion…****The mechanism forms a structure, when the number of degrees of freedom (n) is equal to****A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The total acceleration…****The factional torque for square thread at the mean radius r while raising load W is given by****The frequency of oscillation of a torsional pendulum is****In order to give a complete secondary balance of a multi-cylinder inline engine,****The relation l = (2/3).(j + 2) apply only to kinematic chains in which lower pairs are used. This may…****The maximum or minimum value of the swaying couple is****There are six gears A, B, C, D, E and F in a compound train. The numbers of teeth in the gears are 20,…****A point on a connecting link (excluding end points) of a double slider crank mechanism traces a****When the crank is at the inner dead centre, in a reciprocating steam engine, then the acceleration of…****In Meyer's expansion valve, the expansion valve is driven by an eccentric having an angle of advance…****When the crank is at the outer dead centre, in a reciprocating steam engine, then the acceleration of…****In a simple harmonic motion, the velocity vector with respect to displacement vector****The velocity of any point in mechanism relative to any other point on the mechanism on velocity polygon…****Relationship between the number of links (L) and number of pairs (P) is**