January 2022

PUNCH

Punches are used in order to make certain dimensional features of the layout permanent. There are two types of punches. They are centre punch and prick punch made of high carbon steel, hardened and ground. Centre Punch: The angle of the point is 90° in a centre punch. The punch mark made by this is

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Happy Republic Day

Republic Day commemorates the spirit of independent and individual India. It was on this day in 1930 when the Indian National Congress proclaimed Poorna Swaraj, the declaration of India’s independence from colonial rule. The day also commemorates Indian citizens’ power to choose their government democratically. The 26th of January every year is celebrated as the Republic Day-

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ELECTRICAL SWITCH BOARD CONNECTION

Hey in this article you are going to learn how to wire a switchboard Here I have explained the electrical switchboard connection having Fuse. Switches Sockets Indicator and Fan Regulator Also here I have shown how to connect the switchboard with Lights and a fan for a room This article will help you to make the connection of the switchboard at home very easily You will see here all are marked with a proper current rating that will help you very much to select the rating of switch fuse and sockets.

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PHYSICAL AND MECHANICAL PROPERTIES ENGINEERING METALS

Physical properties of metal Metals have different properties. Depending on the type of application, different metals are selected. Physical properties of metals Colour Weight/Specific gravity Structure Conductivity Magnetic property Fusibility Color :- Different metals have different colors . For example, copper is of a distinctive red color. Mild steel is of a blue/black sheen. Weight

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Lettering and numbering as per BIS SP: 46-2003

Apart from graphical elements (lines, arcs, circles etc.) technical drawings will also contain written information. These written informations are referred as “lettering”. Styles of lettering: Many styles of lettering are in use to day. However, a few styles which are commonly used are shown in given figure. Standard heights/Width: The standard heights recommended by BIS

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