Home

The primary 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 length of connecting rod to radius of crank)

A. m.ω².r sinθ

B. m.ω².r cosθ

C. m.ω².r (sin 2θ/n)

D. m.ω².r (cos 2θ/n)

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. A friction circle is a circle drawn when a journal rotates in a bearing. Its radius depends upon the…
  2. In under damped vibrating system, if x₁ and x₂ are the successive values of the amplitude…
  3. The instantaneous centres which vary with the configuration of mechanism are called
  4. Which is the false statement about the properties of instantaneous centre?
  5. The amplitude of vibration is always __________ the radius of the circle.
  6. A kinematic chain is known as a mechanism when
  7. The partial balancing means
  8. The pitching of a ship produces forces on the bearings which act __________ to the motion of the ship.
  9. If some links are connected such that motion between them can take place in more than one direction,…
  10. The primary unbalanced force is maximum _________ in one revolution of the crank.
  11. In a disc clutch, if there are n₁ number of discs on the driving shaft and n₂ number of…
  12. When two pulleys are connected by means of a cross belt drive, then both the pulleys will rotate in…
  13. Kinematic pairs are those which have
  14. Two pulleys of radii r₁ and r₂ and at distance x apart are connected by means of an open…
  15. The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction)
  16. The swaying couple is due to the
  17. In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and…
  18. A rotary internal combustion engine has __________ cylinders.
  19. Pitch point on a cam is
  20. The component of the acceleration, perpendicular to the velocity of the particle, at the given instant…
  21. The pressure angle of a cam depends upon
  22. In a cone pulley, if the sum of radii of the pulleys on the driving and driven shafts is Constant, then
  23. In a hydrodynamic journal bearing, there is
  24. When a shaking force is transmitted through the springs, damping becomes detrimental when the ratio…
  25. The acceleration of a flat-faced follower when it has contact with the flank of a circular arc cam,…
  26. The dedendum circle diameter is equal to (where, φ = Pressure angle)
  27. The moment on the pulley which produces rotation is called
  28. When one of the links of a kinematic chain is fixed, the chain is known as a
  29. In a four bar chain or quadric cycle chain
  30. The cam and follower is an example of