3. Put the verb to be into the correct form and read the text.
In many cases, water (not to be) an appropriate extinguishment. For instance, where electrical equipment (to be) involved a gaseous agent (to be) the obvious solution.
One such option (to be) Carbon Dioxide economical, colourless, odourless and electrically non-conductive—perfect for the protection of vital services. Like any extinguishing system, a Carbon Dioxide installation (to be) checked and maintained on a regular basis.
4. Fill in the missing preposition and adverbial particles given in the box.
Out by far at along in with on of into over |
Fighting Fire
Some fires are harder to put ... than others. Water can put ... wood and paper fires ... lowering the temperature. Water will not put ... an oil fire because oil will rise ... top of water and continue to burn. Sand and dirt may be used ... small oil fires. Water fog, foam, dry chemical, or soda acid extinguishers are also used. Foam or some kind of vapour put ... top of the oil fire will smother it ... keeping ... the oxygen it needs to burn.
Electrical fires may be put ... … carbon dioxide, dry chemical, or vaporizing liquid extinguishers. These are used because they do not conduct electricity. Water is not used because it is a conductor.
Hand fire extinguishers are used only … small fires. ... the United States, extinguishers are examined ... the Underwriters' Laboratories ... Chicago, Illinois. Every extinguisher should have a label that tells the kind and size of fire it will control. Only extinguishers approved ... the Underwriters' Laboratories should be used.
SPEAKING
T
he
article below tells us about new trends in portable fire
extinguisher design. Look at the picture, read what people say about
it and answers of the designer. Get ready to discuss these
problems, agree or disagree.
Designer: - For my design studio I am redesigning a fire extinguisher. I did this board for my mid crit and thought it was fun. This project is still in progress: this board was done for a presentation midway through the process. It is one hand use and a pin will be added. I was just trying to work out the overall form of the object. I still have to design a label, work out some details, and make either a physical or compute model.
- I was thinking about when fire extinguishers are used. It seems like mine would be hard to aim under stress. What about rethinking the general form? Maybe change the tank from vertical to horizontal so you could just point the whole unit at the fire like a hose. Just a thought...
Looks like a kind of wine bottle... In most emergency situations, overstyling becomes a hindrance to efficient use. I suggest that you concentrate on the pure ergonomics and functionality of the design before trying to beautify it. There is a huge platform for a more functional/efficient design for this product. - Could you indicate the size of the thing and how does it indicate its pressure level to the user? - Have you thought through the colour? It does indicate what fire type it is for.
Designer: There are two reasons that the head is pointing down at a 15 degree angle. This way the relatively heavy canister can hang plume while the user puts out a fire 6 feet away from themselves as well as aligning the wrist and forearm when the unit is held below the waist (as most of my users who I filmed using extinguishers did in fact hold it). However my professors have pointed out that the former is only a useful feature if the fire is in-fact on ground level. So perhaps a compromise angle might be best. Thank you for some very helpful criticism.
CHECKING TASKS