Mechanical Engineering Mcqs

Center of percussion is___________________?
  • (A)  the point of C.G.
  • (B)  the point of metacentre
  • (C)  the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
  • (D)  point of suspension
  • (E)  the point in a body about which it can rotate horizontally and oscillate under the influence of gravity
According to Lami’s theorem___________________?
  • (A)  three forces acting at a point will be in equilibrium
  • (B)  three forces acting at a point can be represented by a triangle, each side being proportional to force
  • (C)  if three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium
  • (D)  if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two
  • (E)  none of the above
According to law of triangle of forces __________________ ?
  • (A)  three forces acting at a point will be in equilibrium
  • (B)  three forces acting at a point can be represented by a triangle, each side being proportional to force
  • (C)  if three forces acting upon a patticle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium
  • (D)  if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two
  • (E)  none of the above