DRAWINGS PROFESSIONAL ENGLISH IN USE FOR ENGINEERING

 

PROFESSIONAL ENGLISH IN USE FOR ENGINEERING UNIT 1. DRAWINGS

 

A Drawing types and scales In engineering, most design information is shown on drawings. Today, drawings are generally not drawn by hand. They are produced on computer, using CAD (computer-aided design systems). A key factor on a drawing is the scale-that is, the size of items on the drawing in relation to their real size. When all the items on drawing are shown relative to their real size, the drawing is drawn to scale, and can be called a scale drawing. An example of a scale is 1:10 (one to ten). At 1:10, an object with a length of 100 mm in real life would measure 10 mm on the drawing. B Types of views used on drawings Technicians are discussing different views shown on drawings (looking at components from above, from the side, etc.), as they search for the information they require, EXERCISES 1.1 Complete the sentences. Look at A opposite to help you. 1. Enlarged drawings show components larger than their _______________ _______________. 2. For engineering drawings, 1:5 is a commonly used _______________. 3. Whole machines or structures are shown on _______________ _______________ drawings.   1.2 Match the descriptions (1-6) with the names of views used on drawings (a-f). look at B opposite and Appendix 1 to help you. 1 a 2D view of the side of an object a a plan 2 a 2D view inside an object, as if it is cut through b a section 3 a 2D view, looking down on top of an object c an isometric projection 1.3 Write the full forms, in words, of the abbreviations and shortened terms below. Look at A and B opposite and Appendix 1 on page 98 to help you. 1. GA ____________ ____________ 2. CAD ____________ ____________ ____________ 3. dwg ____________ ____________ ____________ 4. 3D ____________ ____________ 5. section ____________ ____________ 6. 1: 50 ____________ ____________ ____________ 1.4 Complete the sentences, taken from conversations about drawings, using the words and abbreviations in the box. Look at A and B opposite and Appendix 1 to help you. 3D detail elevation GA plan scale schematic section 1. We need a __________ through the bridge, showing the profile of the deck. 2. The only drawing we have is the  __________, which is 1:100, so it obviously doesn’t show things in detail. 3. On drawing 12, there’s a large  __________ of the entire top deck of the ship.

ANSWER KEY