Board Practice: Positioning and Drawing the Title Block; Freehand Writing of Letters and Numerals

Length: 0 minutesComplexity: Standard

<h1>BROAD PRACTICE</h1> <p>CONTENT</p> <ol> <li>Positioning and Drawing the Title Block.</li> <li>Freehand Writing of Letters and Numerals.</li> </ol> <p> </p> <h2>Positioning and Drawing the Title Block</h2> <h3>Title Block</h3> <p>The title block gives necessary information about the drawing such as name of designer, school, class, date, scale etc. The title block is usually at the bottom right-hand corner of the drawing paper.</p> <p><img class="size-full wp-image-32536 aligncenter" src="https://classhall.com/wp-content/uploads/2018/06/title-block.jpg" alt="Board practice - Positioning and Drawing the Title Block" width="522" height="227" /></p> <p> </p> <h2>Writing (freehand) Legible Letters and Numerals</h2> <p>Lettering is the art of writing of letters (alphabets) and numbers (figures) in bold form or lower case form on drawing.</p>

Basic Emission Theory

Complexity: Standard

<h1><strong>BASIC EMISSION THEORY </strong></h1> CONTENT <ol> <li>Definition of Emission</li> <li>Electronic Emission</li> <li>Methods of Emission</li> </ol>   <h2><strong>Definition of Emission </strong></h2> Emission is the displacement or dislodgement of electron from a material with the intention of directing such electron to a predetermined position or object. The basic electronic emission occurs when heat, sunlight, electron collision, electromagnetic field and surface bombardment are used to release electron from the metal surface to the vacuum tube. <h2><strong>Electronic Emission </strong></h2> The electronic emission is the process of liberating or emitting free electrons from the metal surface to the vacuum tubes. A vacuum tube is an empty tube in which the air has been completely removed for the purpose of storing liquefied gas. <h2><strong>Methods of Emission</strong></h2> There are four principal methods of liberating electron from the surface of metal. They are

Freehand Sketching

Length: 0 minutesComplexity: Standard

<h1>FREEHAND SKETCHING</h1> <p>CONTENT</p> <ol> <li>Definition or Meaning of Freehand Sketching</li> </ol> <p> </p> <h2>Definition or Meaning of Freehand Sketching</h2> <p>Freehand sketching is one of the quickest methods by which the shape of an object can be communicated to others without using any drawing instrument except a pen or a pencil. Examples of free hand sketches are:</p>

Basic Electronic Devices

Complexity: Standard

<h1><strong>BASIC ELECTRONIC DEVICES</strong></h1> CONTENT <ol> <li>Definition of Basic Electronic Devices</li> <li>Types of Basic Electronic Devices</li> <li>Uses of Basic Electronic Devices</li> </ol>   <h2><strong>Definition of Basic Electronic Devices</strong></h2> The basic electronic devices are the devices which emit and control the movement of electrons in a desirable manner used in generation of electronic appliances<strong>.</strong> <h2><strong>Types of Basic Electronic Devices</strong></h2> The following are the types of basic electronic devices: <h3>1. Semi Conductors</h3> <img class="size-full wp-image-19731 aligncenter" src="https://classhall.com/wp-content/uploads/2018/06/basic-electronic-devices-semi-conductors.jpg" alt="Basic electronic devices - Semi conductors" width="378" height="237" /> <h3>2. Resistors</h3> <img class="aligncenter wp-image-19732 size-full" src="https://classhall.com/wp-content/uploads/2018/06/basic-electronic-devices-resistor.jpg" alt="Basic electronic devices - Resistors" width="397" height="227" />

Basic Freehand Techniques of Drawing Circles, Irregular Shapes, etc.

Length: 0 minutesComplexity: Standard

<h1>BASIC FREEHAND TECHNIQUES OF DRAWING CIRCLES, IRREGULAR SHAPES, ETC.</h1> <p>CONTENT</p> <p>Basic Freehand Techniques of Drawing Circles, Irregular Shapes, etc.</p> <ol> <li>Sketching a Straight Line</li> <li>Sketching a Curve</li> <li>Sketching a Circle</li> <li>Sketching a Square Box</li> <li>Sketching an Irregular Edge</li> </ol> <p> </p> <h2>Techniques of Sketching</h2> <h3>Sketching a Straight Line</h3> <p>A straight line is defined as the shortest distance between two points. We can use freehand to draw a fairly straight line by the following procedures.</p> <ol> <li>Put a dash or dot far enough to the right-hand side of the paper.</li> <li>Start to draw a line from the left-hand side to join the dash or dot with your eyes fixed on the point.</li> </ol> <h3>Sketching a Curve</h3> <p>To draw a curve by freehand, it will be necessary to plot some points not too far from each other at different levels, like this --------- with the points in position attempt to draw curves by joining the dashes or dots.</p> <h3>Sketching a Circle</h3> <p>To draw circles, the easiest way is to draw lines which are equal in diameter to the circle in different directions. Each line must be as faint and straight as possible, each crossing one another at a central point. Now, join the points by little curves from the top of each line. Try to draw other circles by means of joining two large curves having half the size as radius and full size in diameter.</p> <h3>Sketching a Square Box</h3>

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