A body is said to be under forced vibrations, when
There is a reduction in amplitude after every cycle of vibration
No external force acts on a body, after giving it an initial displacement
A body vibrates under the influence of external force
None of the above
- Throw of a cam is the maximum distance of the follower from
- Torsional vibrations are said to occur when the particles of a body moves
- The method of obtaining different mechanisms by fixing in turn different links in a kinematic chain,…
- In a hydrodynamic journal bearing, there is
- The component of the acceleration, parallel to the velocity of the particle, at the given instant is…
- In a Hartnell governor, the lift of the sleeve is given by (where r₁ and r₂ = Max. and…
- A typewriter mechanism has 7 numbers of binary joints, six links and none of higher pairs. The mechanism…
- Which of the following is an example of a higher pair?
- Which of the following is false statement in respect of differences between machine and structure?
- The velocity of a flat-faced follower when it has contact with the flank of a circular arc cam, is given…
- When the speed of the engine fluctuates continuously above and below the mean speed, the governor is…
- TJIE horse power transmitted by a belt is dependent upon
- The maximum efficiency of spiral gears is (where θ = Shaft angle, and φ = Friction angle)
- Which of the following is a lower pair?
- Angle of action of cam is defined as the angle
- Crowning on pulleys helps
- In a reciprocating engine, usually __________ of the reciprocating masses are balanced.
- In a multiple V-belt drive, when a single belt is damaged, it is preferable to change the complete set…
- Which one of the following can completely balance several masses revolving in different planes on a…
- A pantograph is a mechanism with
- The unbalanced force due to reciprocating masses
- If D₁ and D₂ be the diameters of driver and driven pulleys, then belt speed is proportional…
- For two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given…
- Which of the following is an inversion of Single slider crank chain?
- The pressure angle of a cam depends upon
- In a simple train of wheels, the velocity ratio __________ the intermediate wheels.
- The sense of Coriolis component is such that it
- The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity…
- The relative velocity of B with respect to A in a rigid link AB is
- For high speed engines, the cam follower should move with