Mechanical Engineering MCQs

For any system of coplaner forces, the condition of equilibrium is that the

by
algebraic sum of the horizontal components of all the forces should be zero
algebraic sum of the vertical components of all the forces should be zero
algebraic sum of moments of all the forces about any point should be zero
all of the above
✅ The correct answer is option D.

The assumption made in two stage compression with intercooler is that

by
there is no pressure drop in the intercooler
the compression in both the cylinders is polytropic
the suction and delivery of air takes place at constant pressure
all of the above
✅ The correct answer is option D.

Varingon’s theorem of moments states that if a number of coplaner forces acting on a particle are in equilibrium, then

by
their algebraic sum is zero
their lines of action are at equal distances
the algebraic sum of their moments about any point in their plane is zero
the algebraic sum of t
✅ The correct answer is option D.