Find the equivalents of translation.

1. Portable foam fire extinguisher

2. Lead or zinc coated steel

3. A stop pin

4. Head assembly

5. The neck ring

6. Flange

7. Stainless steel dip tube

8. a swivel safety-guard

9. spring-loaded plunger valve

10. charge container

a) плунжерный (золотниковый) клапан с пружинным возвратом

b) ободок горловины

c) переносной пенный огнетушитель

d) нержавеющая стальная трубка, погруженная в раствор

e) сталь, покрытая свинцом или цинком

f) предохранительный вертлюг

g) фланец, выступ кромка

h) стопорный палец, стопорный штифт

i) приводная станция, передний узел

j) наполняемый резервуар

 

Find the right endings of each sentence.

1. A loosely fitting lead valve situated at the top of the inner container …

a) … provides free discharge of foam.

b)… provides oxygen access.

c) … provides a seal.

2. The radial holes serve as a vent …

a) … if the nozzle is unblocked.

b) … if the nozzle is blocked.

c) … if the nozzle is screwed.

3. The annular space formed by the inner and outer containers is filled up …

a) … with a solution of sodium bicarbonate.

b) … with a solution of aluminium sulphate.

c) … with a foam solution.

4. The contents of 136-liter foam fire extinguisher include: …

a) … 5 ml of the sodium solution mixed with 15 ml of the alkali solution.

b) … 5 ml of the acid solution mixed with 15 ml of the alkali solution.

c) 5 ml of the aluminium sulphate solution mixed with 15 ml of the acid solution.

5. The head assembly of 9 liter portable mechanical foam fire extinguisher provides: …

a) … a seal and the plunger moving up.

b) … the nozzle seal in a charge container.

c) … a seal and securing the charge container in place.

6. The hose of this type of fire extinguisher is coupled to…

a) … the removable head assembly.

b) … the brass elbow coupling.

c) … the thick rubber washer.

7. Released CO2 force out liquid foam concentrate …

a) … into the sulpher solution.

b) … into the water.

c) … in fin-protected air holes.

8. The foam solution is then …

a) … driven up the steel dip tube.

b) … driven up the neck ring.

c) … discharged through the nozzle.

 

Restore the sentences.

1. The inner and outer containers of 9-litre foam fire extinguisher … 2. Воздушные отверстия служат вентилятором … 3. By inverting the extinguisher the lead seal will fall clearing the ports into the inner container … 4. для активации 136-литрового пенного огнетушителя шланг разматывается, клапан открывается, стопорный штифт удаляется.... 5. The hose of 9-litre portable mechanical foam fire extinguisher is coupled to a brass elbow coupling … 6. Для предупреждения случайного выпуска … 7. When the plunger is depressed … 8. 9-литровый переносной механический огнетушитель можно быстро перезагрузить; все что нужно, это …

a) … которое припаивается к нержавеющей стальной трубе погружения. b) … a swivel safety-guard is provided. c) … сделаны из стали, покрытой свинцом или цинком. d) to fill body with water to the required level, drop in a new charge container and replace head assembly. e) … и два раствора затем могут свободно смешиваться. f) … if the nozzle is blocked. g) … он пробивает тонкую медную пломбу, освобождая углекислый газ. h) … and the extinguisher is pivoted until it rests on the crossbar.

 

Read and translate the text.

 

FIRE EXTINGUISHERS (C0₂)

CO₂ Portable Fire Extinguisher

Construction

The body is made of solid drawn steel which is hydraulically tested to 227 bar (22.7 MN/m²) and it is coated internally and externally with zinc, the external surface being finally painted.

A solid brass pressing forms the head assembly and this is screwed into the neck of the steel bottle. The head assembly incorporates a lever-operated valve, copper dip tube, bursting disc and a discharge horn made of non-conducting (electrically) material that can be swivelled in one plane only into the desired position.

Contents

The body is charged with 4.5 kg of liquid C0₂ at a pressure of 53 bar (5.3 MN/m²) approximately.

Operation

A safety pin (not shown in sketch) would first be removed and then the valve operating lever would be depressed. The liquid CO₂ would pass into the discharge horn and emerge as a cloud of C0₂.

Performance

Range about 3 to 4 m in still air, duration of discharge about 20 s, about 2.5 m³ of gas is produced.

Note: СО₂extinguishes a fire by cooling and smothering, the gas has the advantage that it can get into inaccessible places. CO₂ extinguisher contents, can be checked by regular weighing, this should be done about every four months.

C0₂ and Water Portable Fire Extinguisher.

Construction

The body of the extinguisher is of welded steel zinc coated, with the external surface painted. A brass neck ring is silver soldered to the top of the steel body and the brass head assembly, which incorporates plunger, handle and swivel safety guard, is screwed into it and seals on a thick rubber washer. Small radial vent holes are drilled in the head assembly which serve to relieve internal pressure when the head is being unscrewed in the event of the nozzle being blocked.

A brass double purpose nozzle is fitted to the delivery end of the reinforced rubber hose and the nozzle can be operated to give water jet or spray as desired.

When the swivel guard is in the protective position the spring loaded piercer is slightly depressed, this serves to keep the extinguisher vented when not in use and prevents water overflow due to change in atmospheric conditions.

Contents

The body contains 9 litres of fresh water, usually a wetting agent is added to the water which enables the water to spread more readily. The inner container is welded steel, zinc coated, and is charged with 74 mg of СО₂ at a pressure of approximately 36 bar (3.6 MN/m²).

Operation

The hose is first uncoiled from the body and the swivel guard is swung to uncover the plunger. The plunger is then depressed, this releases the СО₂ which then drives the water out of the extinguisher via the dip tube and hose.

Performance

Length of jet 10.6 m approximately, spray6.06 m with about 36 m² of cover. Duration of discharge approximately 60 seconds. Body tested hydraulically to 25 bar (2.5 MN/m²).