Articles Posted in the " Theory of Machines " Category

  • UNBALANCING & METHODS OF BALANCING

    UNBALANCING & METHODS OF BALANCING

    UNBALANCING & METHODS OF BALANCING UNBALANCING Unbalancing means There are only unbalanced forces: These cause static unbalance (where the mass axis is displaced  only parallel to the shaft axis) . There are only unbalanced couples: These cause rotary unbalance. There are unbalanced forces as well as unbalanced couples: These cause static as well as rotary unbalance. […]


  • UNBALANCING OF ROTORS

    UNBALANCING OF ROTORS

     UNBALANCING OF ROTORS BALANCE QUALITY OR BALANCE TOLERANCE OR HOW MUCH OF AN UNBALANCE IS ACCEPTABLE  ANSI (AMERICAN NATIONAL STANDARDS INSTITUTE) gives the answer to the above question. Standard for Balance Quality of Rotating Rigid Bodies is ANSI S 2.19-1975. These standards make recommendations to the permissible residual unbalance as a function of the maximum […]


  • *BALANCING AND UNBALANCING

    *BALANCING AND UNBALANCING

    BALANCING AND UNBALANCING FORCES There are many different forces like contact force, gravity force, inertia force, wind force, fluid pressure force, static force, thermal force, centrifugal , frictional force, pushing force, pulling force, seismic force, snow force, normal force, tangential force etc. Without a force no action like dancing, cycling, playing sports. Even a stationary […]


  • DEGREES OF FREEDOM

    DEGREES OF FREEDOM

    DEGREES OF FREEDOM The motion of a body or mechanism is defined by the number of degrees of freedom it possesses. It can also be said that degrees of freedom is the minimum number of independent parameters which describe the motion of a body or of a mechanism without violating any constraint imposed on it. […]


  • SHORT QUESTION ANSWERS-CRITICAL SPEED

    SHORT QUESTION ANSWERS-CRITICAL SPEED

          https://www.mesubjects.net/wp-admin/post.php?post=7429&action=edit          MCQ Shear stresses in beams-1 https://www.mesubjects.net/wp-admin/post.php?post=8001&action=edit         MCQ Shear stresses in beams-2 https://www.mesubjects.net/wp-admin/post.php?post=7433&action=edit          MCQ Bending & Axial Loading Combined https://www.mesubjects.net/wp-admin/post.php?post=4303&action=edit          Shear stresses in beams https://www.mesubjects.net/wp-admin/post.php?post=6359&action=edit          Slope and Deflection https://www.mesubjects.net/wp-admin/post.php?post=6345&action=edit           Bending stresses Question Bank https://www.mesubjects.net/wp-admin/post.php?post=6110&action=edit            Q. Ans Bending https://www.mesubjects.net/wp-admin/post.php?post=3503&action=edit               Q. Ans. Bending-2 https://www.mesubjects.net/wp-admin/post.php?post=3482&action=edit                 Q. Ans. Bending-3 https://www.mesubjects.net/wp-admin/post.php?post=3454&action=edit                  Bending stresses-2 https://www.mesubjects.net/wp-admin/post.php?post=2271&action=edit                 Q. Ans. Slpoe […]


  • INTERVIEW SHORT QUESTION ANSWERS-GOVERNERS

    INTERVIEW SHORT QUESTION ANSWERS-GOVERNERS

    INTERVIEW SHORT QUESTION ANSWERS-GOVERNERS Keywords: Hunting-sticking-sensitiveness-performance 1. What is the meaning of a  governor in a machine? Maintains a constant speed under changing power requirements over a longer interval of time by controlling supply of driving fluid / fuel in case of an engine / the supply of steam flow in case of a steam […]


  • SHORT QUESTION ANSWERS-STEAM TURBINE-1

    SHORT QUESTION ANSWERS-STEAM TURBINE-1

     SHORT QUESTION ANSWERS-STEAM TURBINE-1 1. What is a steam turbine? Steam turbine is a high speed rotating machine which converts the heat energy of steam into work energy (motion energy or electrical energy). 2. Why is steam turbine most widely used? Steam turbines are widely used to develop power as their efficiency is highest as […]


  • INVOLUTE AND CYCLOID GEAR PROFILES

    INVOLUTE AND CYCLOID GEAR PROFILES

    INVOLUTE AND CYCLOID GEAR PROFILES (a) INVOLUTE PROFILE Curve which satisfies the law of gearing is called involute profile. STANDARD INVOLUTE PROFILES (i) 14 ½ involute, addendum length =a = 1/pd , Clearance = C = 0.157/pd , Np min =18 (ii) 200 involute, addendum length = a = 1/pd , Clearance =C = 0.2/pd ,     Np min […]


  • *GEARS INTRODUCTION

    *GEARS INTRODUCTION

    https://www.mesubjects.net/wp-admin/post.php?post=6178&action=edit         Question Answers Gears https://www.mesubjects.net/wp-admin/post.php?post=6210&action=edit          Mech Properties-1 https://www.mesubjects.net/wp-admin/post.php?post=6160&action=edit            Q.A. Riveted Joints https://www.mesubjects.net/wp-admin/post.php?post=6151&action=edit            Q.A. Machine Design-1 https://www.mesubjects.net/wp-admin/post.php?post=2253&action=edit              Q.A. Different Loads GEARS Gear is one of three modes of power transmission from the driver to the driven. In most of the cases, driver is electric motor and the driven is the machine. It may be a lathe, […]