Engineering Mechanics MCQs (Part-9)

What is the formula for calculating the mechanical advantage of a pulley system?

A Length of the rope
B Diameter of the pulley
C Number of ropes supporting the load
D Weight of the pulley

Which of the following is true for a beam fixed at both ends?

A It is called a simply supported beam
B It restricts rotation and translation at both ends
C It allows rotation at both ends
D It has a roller support at one end

What is the formula for calculating the angular velocity?

A Change in angular displacement / Time
B Force × Distance
C Mass × Acceleration
D Force / Area

Which of the following is true for a truss structure?

A It carries bending moments
B It carries only axial loads
C It is made of curved members
D It cannot carry tension

What is the formula for calculating the coefficient of friction?

A Frictional force / Normal force
B Normal force / Frictional force
C Mass × Acceleration
D Force × Distance

Which of the following is true for a free-body diagram?

A It includes internal forces
B It shows only external forces
C It is used only for beams
D It ignores equilibrium

What is the formula for calculating the center of mass?

A Sum of forces / Total mass
B Sum of moments / Total mass
C Sum of distances / Total volume
D Sum of areas / Total length

Which of the following is true for a rigid body?

A It is only used in fluid mechanics
B It cannot rotate
C It deforms under load
D It has no deformation under load

What is the formula for calculating the angular momentum?

A Mass × Velocity × Radius
B Force × Distance
C Mass × Acceleration
D Force / Area

Which of the following is true for a simply supported beam?

A It has a hinge support at one end and a roller at the other
B It has fixed supports at both ends
C It cannot carry bending moments
D It is used only for vertical loads

What is the formula for calculating the strain energy?

A Force / Area
B Force × Distance
C Mass × Acceleration
D (1/2) × Stress × Strain × Volume

Which of the following is true for a pulley system?

A It decreases the input force
B It increases the input force
C It changes the direction of force
D It has no mechanical advantage

What is the formula for calculating the mechanical advantage of a lever?

A Effort arm / Load arm
B Load arm / Effort arm
C Force × Distance
D Mass × Acceleration

Which of the following is true for a centroid?

A It is the geometric center of an area
B It is the balance point of a body
C It is the same as the center of gravity
D All of the above

What is the formula for calculating the work-energy principle?

A Work done = Change in potential energy
B Work done = Change in kinetic energy
C Work done = Force × Distance
D Work done = Mass × Acceleration