Mechanical Engineering MCQs

Page No. 147

The center of percussion of a solid cylinder of radius r resting on a horizontal plane will be_________________?


ar/2


b2r/3


cr/A


d3r/2


View Answer 3r/2

From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the center of circular plate____________________?


a0.5 cm


b1.0 cm


c1.5 cm


d2.5 cm


View Answer 0.5 cm

According to Lami’s theorem___________________?


athree forces acting at a point will be in equilibrium


bthree forces acting at a point can be represented by a triangle, each side being proportional to force


cif 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


dif three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two



D’ Alembert’s principle is used for______________________?


areducing the problem of kinetics to equivalent statics problem


bdetermining stresses in the truss


cstability of floating bodies


ddesigning safe structures



According to law of triangle of forces __________________ ?


athree forces acting at a point will be in equilibrium


bthree forces acting at a point can be represented by a triangle, each side being proportional to force


cif 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


dif three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two



Which of the following is a vector quantity___________________?


aenergy


bmass


cmomentum


dangle


View Answer momentum

The forces, which meet at one point, but their lines of action do not lie in a plane, are called_________________?


acoplanar non-concurrent forces


bnon-coplanar concurrent forces


cnon-coplanar non-concurrent forces


dintersecting forces



According to principle of moments__________________?


aif a system of coplanar forces is in equilibrium, then their algebraic sum is zero


bif a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero


cthe algebraic sum of the moments of any two forces about any point is equal to moment of theiwesultant about the same point


dpositive and negative couples can be balanced



Friction force for dry surfaces. Friction force is________________? Pick up wrong statement?


aproportional to normal load between the surfaces


bdependent on the materials of contact surface


cproportional to velocity of sliding


dindependent of the area of contact surfaces



A cable with a uniformly distributed load per horizontal meter run will take the following shape________________?


astraight line


bparabola


chyperbola


delliptical


View Answer parabola

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