THEORY OF MACHINES INTERVIEW QUESTIONS AND ANSWERS
Q: What is a machine?
A: A machine is a device that is designed to convert one form of energy into another or to transmit, modify, or apply force.
Q: What is a kinematic chain?
A kinematic chain is a sequence of links connected by joints in such a way that the motion of one link affects the motion of all the other links in the chain.
Q: What is the difference between a mechanism and a machine?
A mechanism is a combination of rigid bodies connected by links and joints, designed to transmit motion and force. A machine, on the other hand, is a mechanism that is capable of performing useful work.
Q: What is a degree of freedom?
The degree of freedom of a mechanism refers to the number of independent parameters required to describe its motion completely.
Q: What is a cam mechanism?
A cam mechanism is a device that converts rotary motion into linear motion or vice versa, by means of a cam and a follower.
Q: What is meant by the term 'inversion of a mechanism'?
The inversion of a mechanism refers to the process of obtaining a new mechanism by changing the fixed and moving parts of an existing mechanism.
Q: What is a slider-crank mechanism?
A slider-crank mechanism is a mechanism that converts rotary motion into linear motion or vice versa, by means of a slider and a crank.
Q: What is meant by the term 'kinematic analysis'?
Kinematic analysis is the study of the motion of a mechanism, without considering the forces or torques that cause the motion.
Q: What is the difference between kinematics and kinetics?
A: Kinematics deals with the motion of bodies without considering the forces that cause the motion, whereas kinetics is concerned with the forces that cause the motion.Q: What is the difference between velocity and acceleration?
A: Velocity is the rate of change of displacement, while acceleration is the rate of change of velocity.Q: What is a link in a machine?
A: A link is a rigid body that is used to transmit motion or force in a machine.Q: What is a cam and follower mechanism?
A: A cam and follower mechanism is a system in which a cam rotates and imparts motion to a follower, which is usually a lever or a roller.Q: What is a gear train?
A: A gear train is a mechanism that transmits motion and power between rotating shafts using gears.Q: What is the difference between spur gears and helical gears?
A: Spur gears have teeth that are straight and parallel to the axis of rotation, while helical gears have teeth that are angled or helical.Q: What is a planetary gear system?
A: A planetary gear system is a type of gear system in which one or more gears rotate around a central gear or sun gear.Q: What is a clutch?
A: A clutch is a mechanical device that is used to connect or disconnect two rotating shafts.Q: What is a brake?
A: A brake is a mechanical device that is used to slow down or stop the motion of a machine.Q: What is the difference between a rigid and flexible coupling?
A: A rigid coupling connects two shafts directly, while a flexible coupling allows for some degree of misalignment and vibration damping between the shafts.Q: What is a mechanism?
A: A mechanism is a combination of moving parts arranged to perform a specific function.Q: What is kinematics?
A: Kinematics is the study of motion without considering the forces that cause the motion.Q: What is kinetics?
A: Kinetics is the study of motion taking into account the forces that cause the motion.Q: What is a degree of freedom? A: A degree of freedom is the number of independent ways in which a mechanism can move.
Q: What is a link?
A: A link is a rigid body that is capable of rotating or translating relative to another link.Q: What is a joint?
A: A joint is the connection between two links that allows them to move relative to each other.Q: What is a binary link?
A: A binary link is a link that has two joints.Q: What is a ternary link?
A: A ternary link is a link that has three joints.Q: What is a planar mechanism?
A: A planar mechanism is a mechanism that operates in a single plane of motion.Q: What is a spatial mechanism?
A: A spatial mechanism is a mechanism that operates in three-dimensional space.Q: What is a cam?
A: A cam is a mechanism that converts rotary motion into reciprocating motion.Q: What is a follower?
A: A follower is the part of a cam mechanism that follows the contour of the cam.Q: What is a gear?
A: A gear is a rotating machine part with teeth that mesh with other gears to transmit torque.Q: What is a rack and pinion?
A: A rack and pinion is a mechanism that converts rotary motion into linear motion.Q: What is a belt drive?
A: A belt drive is a mechanism that transmits power between two rotating shafts using a belt.Q: What is a pulley?
A: A pulley is a rotating machine part with a grooved rim that holds a belt or rope.Q: What is a screw?
A: A screw is a mechanism that converts rotary motion into linear motion.Q: What is a screw jack?
A: A screw jack is a mechanical device used to lift heavy loads.Q: What is a clutch?
A: A clutch is a mechanism used to engage or disengage two rotating shafts.Q: What is a brake?
A: A brake is a mechanism used to slow or stop a rotating shaft.Q: What is a flywheel?
A: A flywheel is a rotating mechanical device used to store kinetic energy.Q: What is a governor?
A: A governor is a mechanism used to control the speed of a machine.Q: What is a slider-crank mechanism?
A: A slider-crank mechanism is a mechanism that converts reciprocating motion into rotary motion.Q: What is a four-bar mechanism?
A: A four-bar mechanism is a planar mechanism consisting of four links connected by four joints.Q: What is a coupler curve?
A: A coupler curve is the path traced by a point on the coupler of a four-bar mechanism.Q: What is a double slider-crank mechanism?
A: A double slider-crank mechanism is a mechanism that converts reciprocating motion into reciprocating motion.Q: What is a Geneva mechanism?
A: A Geneva mechanism is a mechanism that provides intermittent motion by using a rotating drive wheel and a driven wheel with a pin that advances the driven wheel one step at a time.Q: What is a toggle mechanism?
A: A toggle mechanism is a mechanism that uses a linkage consisting of two links connected by a joint to provide a high mechanical advantage.Q: What is a parallel mechanism?
A: A parallel mechanism is a mechanism that has multiple independent chains of links that connect the input and output.Q: What is a serial mechanism?
A: A serial mechanism is a mechanism in which the output of one link is the input of the next link in a chain.Q: What is a Stewart platform?
A: A Stewart platform is a parallel mechanism that has six linear actuators arranged in a pyramidal configuration to control the position and orientation of a platform.Q: What is a kinematic chain?
A: A kinematic chain is a sequence of links and joints that connect the input and output of a mechanism.Q: What is a mobility?
A: Mobility is the number of degrees of freedom of a mechanism.Q: What is the difference between a machine and a robot?
A: A machine is a device that performs a specific task, while a robot is a machine that is capable of performing a variety of tasks through programmed instructions or artificial intelligence.Q: What is a Scotch yoke mechanism?
A: A Scotch yoke mechanism is a mechanism that converts rotary motion into reciprocating motion using a sliding block that is attached to a reciprocating member.Q: What is a mobility equation?
A: A mobility equation is an equation that relates the number of links, joints, and degrees of freedom in a mechanism.Q: What is a Grashof condition?
A: The Grashof condition is a mathematical rule that determines whether a four-bar mechanism can achieve continuous rotation.Q: What is a transmission angle?
A: The transmission angle is the angle between the line of action of the driving force and the line of action of the driven force in a mechanism.Q: What is a toggle mechanism?
A: A toggle mechanism is a mechanism that locks at the end of the stroke, allowing it to exert a high force.Q: What is a parallel mechanism?
A: A parallel mechanism is a mechanism that has multiple input and output links that move in parallel.Q: What is a serial mechanism?
A: A serial mechanism is a mechanism that has a single input and output link.Q: What is a kinematic singularity?
A: A kinematic singularity is a condition where a mechanism loses one or more degrees of freedom.Q: What is a workspace?
A: A workspace is the range of motion that can be achieved by the end effector of a robotic mechanism.Q: What is a manipulator?
A: A manipulator is a robotic mechanism that is designed to move objects or perform tasks.Q: What is a forward kinematics problem?
A: A forward kinematics problem is the problem of determining the position and orientation of the end effector of a manipulator given the joint angles.Q: What is an inverse kinematics problem?
A: An inverse kinematics problem is the problem of determining the joint angles of a manipulator given the position and orientation of the end effector.