The contact ratio is the ratio of

1.	The contact ratio is the ratio of
A.	length of pair of contact to the circular pitch
B.	length of arc of contact to the circular pitch
C.	length of arc of approach to the circular pitch
D.	length of arc of recess to the circular pitch
Answer» C. length of arc of approach to the circular pitch

Discussion

No Comment Found

Related MCQs

The secondary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, θ = Angle of inclination of crank with the line of stroke, and n = Ratio of the lengm of connecting rod to radius of crank)
In a differential band brake as shown in the below figure, the drum rotates anticlockwise and the greater tension T1 acts at A and smaller tension T2 at B. Length OA is greater than length OB. In order to apply the brake, the force P at C should
In a Hartnell governor, the lift of the sleeve is given by (where r1 and r2 = Max. and min. radii of rotation, x = Length of ball arm of the lever, and y = Length of sleeve arm of the lever)
The acceleration of piston in a reciprocating steam engine is given by (where ω = Angular velocity of crank, r = Radius of crank pin circle, θ = Angle turned by crank from inner dead centre, and n = Ratio of length of connecting rod to the radius of crank)
Two pulleys of radii r1 and r2 and at distance x apart are connected by means of an open belt drive. The length of the belt is
The frictional torque transmitted in a flat pivot bearing, considering uniform pressure, is (where μ = Coefficient of friction, W = Load over the bearing, and R = Radius of bearing surface)
A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The angular acceleration of the link AB is (where and = Radial and tangential components of the acceleration of B with respect to A)
The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω1 rad/s in the clockwise direction and the link OB turns with angular velocity ω2 rad/s in the anti-clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)
When a particle moves round the circumference of a circle of radius r with ω rad/s, then its maximum acceleration is ω2r.
In a Hartnell governor, the stiffness of the spring is given by (where S1 and S2 = Spring forces exerted on the sleeve at max. and min. radii of rotation, and h = Compression of the spring)

The contact ratio is the ratio of

Discussion

No Comment Found

Related MCQs

Reply to Comment