MATERIAL FORMATS PROFESSIONAL ENGLISH IN USE FOR ENGINEERING

 

PROFESSIONAL ENGLISH IN USE FOR ENGINEERING UNIT 21. MATERIAL FORMATS

 

A Raw materials for processing Generally, raw materials which need to be processed before they are used – for example, melted and cast in mould. Common formats of raw material are: ·           Powder: quantities of very fine (small) particles, such as cement powder. B Formats of processed materials Materials are frequently supplied ready for use in the formats described below. ·           Bars are long lengths of solid metal with a relatively small cross-sectional area. These can be round bars (or rods) which have a circular section.  They may also be square bars, with a square section, and flat bars, with a flat, rectangular section. A bar is generally made of metal, but a rod can be made of any material.     EXERCISES 21.1 Decide whether the sentences below are true or false, and correct the false sentences. Look at A opposite to help you. 1. Raw materials are often intended to be melted or mixed. 2. Powder particles are smaller than pellets. 21.2 Complete the descriptions below the photos using the words in the box. You will need to use some words more than once. Look at B opposite to help you. bar cable flat rod sheet stranded wire bloom coil plate round solid tube

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