Flexible coupling is used because
It is easy to disassemble
It is easy to engage and disengage
It transmits shocks gradually
It prevents shock transmission and eliminates stress reversals
- In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line…
- The frictional torque transmitted in a conical pivot bearing, considering uniform wear, is
- The critical speed of a shaft with a disc supported in between is equal to the natural frequency of…
- When the sleeve of a Porter governor moves upwards, the governor speed
- Length of arc of contact is given by
- Angle of dwell of cam is defined as the angle
- In full depth involute system, the smallest number of teeth in a pinion which meshes with rack without…
- The natural frequency of free transverse vibrations due to uniformly distributed load acting over a…
- A rigid body possesses ________degrees of freedom
- For the same lift and same angle of ascent, a smaller base circle will give
- In a Hartnell governor, the lift of the sleeve is given by (where r₁ and r₂ = Max. and…
- The motion between a pair when limited to a definite direction, irrespective of the direction of force…
- The brake commonly used in railway trains is
- The dynamic friction is the friction experienced by a body, when the body
- Under logarithmic decrement, the amplitude of successive vibrations are
- The contact ratio is given by
- Sensitiveness of the governor is defined as the ratio of the
- Ball and a Socket forms a
- Which of the following is false statement in respect of differences between machine and structure?
- In a Hartnell governor, the stiffness of the spring is given by (where S1 and S2 = Spring forces exerted…
- The size of cam depends upon
- If the pressure angle is __________, a reciprocating follower will jam in its bearings.
- A completely constrained motion can be transmitted with.
- A kinematic chain is known as a mechanism when
- An automobile steering gear is an example of
- When two pulleys of different diameters are connected by means of an open belt, the angle of contact…
- Which of the following has sliding motion?
- The secondary unbalanced force is maximum when the angle of inclination of the crank with the line of…
- In a reciprocating engine, usually __________ of the reciprocating masses are balanced.
- For an involute gear, the ratio of base circle radius and pitch circle radius is equal to