Engineering Mechanics MCQ Questions & Answers | Mechanical Engineering

A. Change its motion

B. Balance the other forces acting on it

C. Retard its motion

D. All of the above

A. Change its motion

B. Balance the forces, already acting on it

C. Give rise to the internal stresses in it

D. All of these

A. Same as

B. Twice

C. Thrice

D. Four times

A. The three forces must be equal

B. The three forces must be at 120° to each other

C. The three forces must be in equilibrium

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

A. If a system of coplanar forces is in equilibrium, then their algebraic sum is zero

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

C. The algebraic sum of the moments of any two forces about any point is equal to moment of the resultant about the same point

D. Positive and negative couples can be balanced

A. $$2\sqrt {{\text{gh}}} $$

B. $$\sqrt {{\text{gh}}} $$

C. $$\sqrt {2{\text{gh}}} $$

D. $$2{\text{g}}\sqrt {\text{h}} $$

A. W sinθ

B. W cosθ

C. W secθ

D. W cosecθ

A. Between 60 and 70 %

B. Between 70 and 80%

C. Between 80 and 90%

D. 100%

A. The floor is smooth, the wall is rough

B. The floor is rough, the wall is smooth

C. The floor and wall both are smooth surfaces

D. The floor and wall both are rough surfaces

A. Reaction of any smooth surface with which the body is in contact

B. Reaction of a rough surface of a body which rolls on it without slipping

C. Reaction at a point or an axis, fixed in space, around which a body is constrained to turn

D. All of the above