Engineering Mechanics Question

Engineering Mechanics is the branch of  applied science, which deals with laws and principles of Mechanics, along with their applications. The knowledge of Engineering Mechanics is very essential for an engineer in planning, designing and construction of various types of structures and machines.

**Question**

Composition and Resolution of Forces

·         Define the term Force, and state the effects of force.

·         What are the characteristics of a force?

·         Distinguish clearly between composition and resolution of forces.

·         State the following laws

          1.       Parallelogram law of forces

          2.       Triangle law of forces

          3.       Polygon law of forces.

·         State the principle of resolution.

·         Give the classification of forces.

·         Define a Forces system and name different force systems.

·         State the principle of Transmissibility of a force.

·         Explain free body diagram with neat sketch.

Moments

·         Define Moment and its type?

·         State the Law of moment.

·         State the Principle of moments.

·         List the applications of moments.

·         Define the term Couple, and enlist the properties of couple.

·         Define the term Lever.

·         What do you mean by leverage? Explain its usefulness.

·         List the Engineering application of Moments.

·         Explain the process to find resultant of co-planar, non-concurrent, nonparallel force system.

 Equilibrium of Forces

·         State the lami’s theorem.

·         How would you find out the equilibrium of non-coplaner forces?

·         Explain the condition of equilibrium.

·         Discuss the various types of equilibrium.

Centre of Gravity and Moment of Inertia

Note: - Students should remember the center of gravity of regular solids.

·         Define Centroid and Centre of Gravity?

·         Write the differences between centroid and center of gravity?

·         Describe the method of finding out the center of gravity of a body?

·         Define the term Moment of inertia and give its type?

·         How would you find out the moment of inertia of a plane area?

·         State and prove the theorem of perpendicular axis applied to the moment of inertia.

·         Explain the method of finding out the moment of inertia of a composite section.

Friction

·         Define the term Friction?

·         State the laws of friction?

·         Explain the term angle of friction?

·         Define coefficient of friction and limiting friction?

·         What is wedge? State its uses.

·         What is the screw jack? Explain its working principle.

·         Define the helix angle in screw jack.

·         What do you understand by a single start and double start screw?

Framed Structures

·         What is frame? How are frames classified?

·         Write the condition for the perfect frame?

·         Enumerate the assumption made, while finding out the forces in a frame.

·         What is the difference between redundant and deficient frame?

·         What are various types of loading?

·         Write the classification of supports?

·         Define the Degree of freedom. List the Degree of freedom for different supports.

·         Define term Support reaction.

·         What is the difference between cantilever and simply supported frame? How will you find reaction in both the cases?

·         Explain method of joints.

·         Explain method of section.

·         Enumerate difference between method of joint and method of section?

Beams, Shear Force and Bending Moment

·         Define the term beam?

·         How beams are classified on the basis of supports?

·         Define shear force and bending moment.

·         Define point of contraflexure.

·         Define Hogging and sagging in bending of the beam.