## Articles Posted in the " Machine Design " Category

• ### DEGREES OF FREEDOM-1

DEGREES OF FREEDOM -1 PRACTICAL EXAMPLES FOR VARIOUS DEGREES OF FREEDOM  1. EXAMPLES SYSTEMS WITH ONE DEGREE OF FREEDOM A single mass spring system A disc and a shaft system A simple pendulum A crank has only one degree of freedom A four bar linkage has only one degree of freedom 2. EXAMPLES SYSTEMS WITH TWO […]

• ### DEGREES OF FREEDOM -3

DEGREES OF FREEDOM – 3 KINEMATIC CONSTRAINTS The motion of the independent rigid bodies can be controlled with kinematic constraints.A Kinematic constraint  between two or more rigid bodies decreases the degrees of freedom for the connected rigid bodies.Main classification of kinematic pairs falls in three categories. However these three categories are further sub divided as described […]

• ### DEGREES OF FREEDOM-2

DEGREES OF FREEDOM-2 One particle in space has Degrees of freedom = 3 A body has Degrees of freedom in space =6 Thus analysis of a particle and rigid body is entirely different. Single plane degrees of freedom Rigid body in one plane has three degrees of freedom=One rotational + two transnational Single rigid body in […]

• ### Flywheel design

https://www.mesubjects.net/wp-admin/post.php?post=6868&action=edit                 flywheel theory https://www.mesubjects.net/wp-admin/post.php?post=6176&action=edit   Flywheel design (a) DESIGN OF RIM Stresses in a rim Tensile stress due to centrifugal force σt = ρv2 Tensile stresses due to bending of arms σb = M/Z BENDING MOMENT M = wL2/12 w = UDL =Centrifugal force between two arms per unit length w = mRω2 […]

• ### Flywheel Theory

https://www.mesubjects.net/wp-admin/post.php?post=6874&action=edit https://www.mesubjects.net/wp-admin/post.php?post=6176&action=edit     Flywheel Theory  FLYWHEEL Flywheel is an energy storage device where more power is available in the working stroke. It supplies back this energy to the machine in the remaining strokes of the cycle and maintains a constant speed of the machine. Four stroke internal combustion engines develop power only during […]

• ### INTERVIEW SHORT QUESTION ANSWERS ON MACHINE DESIGN

https://www.mesubjects.net/wp-admin/post.php?post=6640&action=edit            Fatigue life-1 https://www.mesubjects.net/wp-admin/post.php?post=6349&action=edit          Torsion assignment https://www.mesubjects.net/wp-admin/post.php?post=6321&action=edit           PTU SOM Paper Sol https://www.mesubjects.net/wp-admin/post.php?post=6213&action=edit          Mech Properties-2 INTERVIEW SHORT QUESTION ANSWERS ON MACHINE DESIGN Definition of design It is a process to create an object/machine to perform the required function satisfactorily over a reasonable period of time (life) with minimum cost. Definition of design synthesis It is a […]

• ### mcq-riveted and screwed joints

mcq— riveted and screwed joints Diagonal pitch is found in riveted joints with Chain riveting Zigzag riveting  riveting chain as well as zigzag None Ans: (ii) Distance between rivets in adjacent rows of a zigzag riveted joint is called Back pitch Marginal pitch Diagonal pitch None Ans: (iii) Tearing efficiency of a riveted joint is […]

• ### Mcq: levers

Mcq: levers Mcq help in understanding the levers in full depth. Levers give us a mechanical advantage. Thus, levers can lift heavy jobs with less effort. Class 1 levers have Effort between the load and the fulcrum Fulcrum placed between the effort and load Load in-between the effort and the fulcrum None Ans: (ii) Levers […]

• ### INTERVIEW SHORT QUESTION ANSWERS- COUPLINGS

INTERVIEW SHORT QUESTION ANSWERS-couplings Q. What is a flexible coupling, give examples and their practical applications? A. A coupling is used to connect two power transmitting shafts having same RPM. It also accommodates misalignment and axial end movement of the shaft. Hence these are also called flexible couplings or compensating couplings. Small misalignment may be linear, […]

• ### INTERVIEW SHORT QUESTION ANSWERS – levers and couplings

SHORT INTERVIEW QUESTION ANSWERS – levers and couplings Q. What are the differences between the hand and the foot levers? A. Sr. No. Hand lever Foot lever 1. Operated by hand Operated by foot 2. Longer in size requiring less effort Smaller in size requiring more effort 3. Response time is less. Response time slightly […]