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  A large, tall machine is used for moving heavy objects by suspending them from a projecting arm or beam. 1.    Wall mounted cranes 2.    Gantry cranes 3.    One leg Gantry cranes                                                 4.    Jib cranes 5.    Mobile cranes a.     Truck mounted cranes b.    Crawler crane c.     Tyre mounted crane d. Loco Crane The following factor to be considered while lifting load •       About the load •       Where the load will be shifted •       Method to be adopted 1.    Manual handling 2.    Mechanical handling •       About the operator •       About the Supervisor...

       Carbon brush (“motor brush”)  A brush is a device that conducts current between stationary wires and moving parts, most commonly in a rotating shaft                                                                                  A carbon brush can be 1. Made of one or more carbon block  2.  Equipped with one or more terminals                             Functions of Carbon Brush Carbon brushes are electromechanical conducting devices that connect to moving parts to provide an electric current. They are typically used in motors, generators, and alternators. Many carbon brush uses exist, but the three basic uses are in    ...

                                                          Condition Monitoring  Condition Monitoring To detect and localized particular components in the machine that is under degrading conditions and diagnose the fault. There are several condition monitoring techniques:-  1.Oil analysis   2.Vibration monitoring,   3.Thermal Inspection,   4.Ultrasonic Inspection   Oil analysis (OA): - Oil analysis (OA) is the sampling and laboratory analysis of a lubricant's properties suspended contaminants, and wear debris. OA is performed during routine preventive maintenance to provide meaningful and accurate information on lubricant and machine condition. Oil analysis  parameters are •        Viscosity •     ...

    Standard Operating Procedure   (SOP) Lubricant handling   Standard procedure for Lubricant-Storage & Handling DO’s & Don’ts DO’s:-   1.Use dedicated storage tanks, pumps, and transfer equipment; one set per lubricant. Label all equipment with the appropriate lubricant identification. 2.Ensure storage tanks always have their fill caps and breathers securely in place 3.Implement a regular-cleaning preventive-maintenance work order for all tanks, reservoirs, and transfer equipment-grease guns, oil cans. 4.Use color-coded containers that match transfer container to lubricant reservoir 5.Never leave lubricant containers open after transfer has taken place. 6.Use appropriate tools and gloves for applying grease and poring the oil.     Don’ts:-   1.Don’t contaminant the grease or oil with other product. 2.Don’t use a bare hands to refill the grease. 3.Don’t inhale the ordure of the grease/oil. 4.Don’t inter...

Corrosion: Corrosion is a natural process, which converts a refined metal to a more chemically-stable form, such as its oxide, hydroxide, or sulfide. It is the gradual destruction of materials by chemical and/or electrochemical reactions with their environment. Factors which Affect Corrosion The main factors which affect corrosion are 1.    More the reactivity of metal, the more will be the possibility of the metal getting corroded. 2.    The impurities help in setting up voltaic cells, which increase the speed of corrosion 3.    Presence of electrolytes in water also increases the rate of corrosion 4.    Presence of  natural  water increase rusting of iron. 5.    When the iron surface is coated with layers of metals more active than iron, then the rate of corrosion is retarded. 6.    A rise in the temperature within a reasonable limit) increases the rate of corrosion. Types of Corrosion 1. ...