Engineering Mechanics Interview Questions

• What is the difference between statics and dynamics?
• Define force and state its units.
• What is the principle of moments?
• Explain the difference between centroid and center of gravity.
• What is Hooke’s Law?
• How do you calculate the resultant force of two or more forces acting on an object?
• Define stress and strain. What is the relationship between the two?
• Explain the difference between compression and tension.
• What is the difference between elastic and inelastic materials?
• Define torque and state its units.
• What is the law of conservation of energy?
• Explain the difference between kinetic energy and potential energy.
• What is the difference between work and power?
• Explain the concept of moment of inertia.
• What is the difference between a beam and a truss?
• Explain the difference between a pin joint and a fixed joint.
• What is the principle of virtual work?
• What is the difference between a frame and a machine?
• Explain the difference between a gear and a pulley.
• What is the difference between a worm gear and a spur gear?
• What is the difference between a scalar and a vector?
• Define displacement, velocity, and acceleration.
• What is Newton’s first law of motion?
• What is Newton’s second law of motion?
• What is Newton’s third law of motion?
• What is the difference between linear and angular motion?
• What is the difference between translational and rotational motion?
• What is the difference between static and kinetic friction?
• What is the coefficient of friction?
• What is the difference between a pulley and a block?
• Explain the concept of simple machines.
• What is the mechanical advantage of a simple machine?
• What is the difference between a wheel and an axle?
• What is the difference between a screw and an inclined plane?
• What is the difference between a wedge and a lever?
• What is the difference between a first-class, second-class, and third-class lever?
• What is the principle of work and energy?
• What is potential energy?
• What is kinetic energy?
• What is the law of conservation of momentum?
• What is the difference between elastic and inelastic collisions?
• What is the principle of impulse and momentum?
• Define impulse and state its units.
• What is the difference between a conservative and non-conservative force?
• What is the difference between a spring and a dashpot?
• What is the difference between a rigid body and a deformable body?
• Define center of mass.
• What is the difference between a free body diagram and an equilibrium equation?
• What is the difference between a moment and a couple?
• What is the difference between a beam and a column?
• What is the difference between a frame and a structure?
• What is the difference between a two-dimensional and three-dimensional analysis?
• What is the difference between a lumped and distributed system?
• Define damping ratio.
• What is the difference between a natural frequency and a resonant frequency?
• What is the difference between a mode shape and a mode frequency?
• What is the difference between a static and dynamic analysis?
• Define the difference between a design and analysis.
• What is the difference between a factor of safety and a reliability index?
• Define the difference between a deterministic and probabilistic analysis.
• What is the difference between a design and a specification?
• Define the difference between a tolerance and an allowance.
• What is the difference between a limit and a fit?
• What is the difference between a clearance and interference fit?
• What is the difference between a statistical and a deterministic distribution?
• Define probability density function.
• Define cumulative distribution function.
• What is the difference between a continuous and discrete random variable?
• What is the difference between a mean and standard deviation?
• What is the difference between a mode and median?
• What is the difference between a variance and covariance?
• Define a correlation coefficient.
• What is the difference between a hypothesis test and a confidence interval?
• What is the difference between a Type I and Type II error?
• What is the difference between a one-tailed and two-tailed test?
• Define sampling distribution.
• Define sampling error.
• What is the difference between a population and a sample?
• What is the difference between a parametric and non-parametric test?
• What is the difference between a chi-squared and t-test?
• What is the difference between a linear and logistic regression?
• What is the difference between a buckling and yielding failure?
• What is the difference between a static and dynamic load?
• What is the difference between a linear and nonlinear analysis?
• What is the difference between a deterministic and stochastic analysis?
• Define a stress-strain curve.
• What is the difference between a tensile and compressive stress?
• Define yield strength and ultimate strength.
• What is the difference between brittle and ductile materials?
• Define fracture toughness.
• What is the difference between a shear and bending stress?
• What is the difference between a normal and shear strain?
• What is the difference between a homogeneous and composite material?
• Define Poisson’s ratio.
• Define Young’s modulus.
• Define shear modulus.
• What is the difference between a material property and material behavior?
• What is the difference between a homogeneous and isotropic material?
• Define anisotropy.
• What is the difference between a linear and nonlinear material?
• Define creep.
• Define fatigue.
• What is the difference between a static and dynamic load?
• Define buckling.
• Define plastic deformation.
• What is the difference between a ductile and brittle fracture?
• Define fatigue limit.
• What is the difference between a static and dynamic load?
• Define hardness.
• What is the difference between a strain gauge and load cell?
• What is the difference between a tensile and compressive load cell?
• What is the difference between a load and stress cell?
• What is the difference between a force and torque sensor?
• Define a strain rosette.
• What is the difference between a fatigue and stress concentration factor?
• Define a fatigue crack.
• What is the difference between a fatigue crack and stress corrosion cracking?
• Define a fracture mechanics analysis.
• What is the difference between a failure mode and effect analysis and fault tree analysis?
• Define redundancy.
• What is the difference between a hazard and risk analysis?
• Define the difference between a component and system analysis.
• What is the difference between a FMEA and FMECA analysis?
• Define a reliability analysis.
• What is the difference between a reliability block diagram and a fault tree analysis?
• Define a fault tolerance analysis.
• What is the difference between a critical and non-critical component?
• Define a system safety analysis.
• What is the difference between a risk and safety assessment?
• Define a hazard and operability study.
• What is the difference between a hazard and operability study and a failure mode and effects analysis?
• Define a safety integrity level.
• What is the difference between a safety instrumented system and a process control system?
• Define a safety critical system.
• What is the difference between a safety critical and non-safety critical system?
• Define a safety critical function.
• What is the difference between a safety critical and non-safety critical function?
• Define a hazard and risk matrix.
• What is the difference between a fault tree analysis and event tree analysis?
• Define a human factors analysis.
• What is the difference between a human factors analysis and ergonomic analysis?
• Define a system engineering process.
• What is the difference between a top-down and bottom-up system engineering approach?
• Define a system requirement.
• What is the difference between a functional and non-functional requirement?
• Define a system specification.
• What is the difference between a system specification and a system requirement?
• What is the difference between a static and dynamic equilibrium?
• Define center of gravity.
• What is the difference between a moment and torque?
• Define moment of inertia.
• What is the difference between a conservative and non-conservative force?
• Define work and energy.
• What is the difference between kinetic and potential energy?
• Define power.
• What is the difference between impulse and momentum?
• Define a projectile motion.
• What is the difference between a uniform and non-uniform circular motion?
• Define simple harmonic motion.
• What is the difference between linear and angular momentum?
• Define angular velocity.
• What is the difference between a rigid and deformable body?
• Define translational and rotational motion.
• What is the difference between a kinematic and kinetic analysis?
• Define force system.
• What is the difference between a concurrent and non-concurrent force system?
• Define resultant force.
• What is the difference between a free body diagram and a shear and moment diagram?
• Define friction.
• What is the difference between static and dynamic friction?
• Define coefficient of friction.
• What is the difference between a rolling and sliding friction?
• Define a moment about an axis.
• What is the difference between a shear and bending moment?
• Define section modulus.
• What is the difference between a pure bending and combined bending and axial loading?
• Define shear center.
• What is the difference between a beam and a column?
• Define deflection.
• What is the difference between a statically determinate and indeterminate structure?
• Define a truss.
• What is the difference between a statically determinate and indeterminate truss?
• Define a frame.
• What is the difference between a statically determinate and indeterminate frame?
• Define a cable.
• What is the difference between a flexible and rigid cable?