Substitute the underlined words with the synonyms from the text.
1. Classification of extinguishing media must be adaptable and every danger needs to be considered separately.
2. Water is thought to be the most efficient and the least expensive extinguishing agent.
3. Water is used by the Fire Service for the most of fires.
4. Fire foams can be classified into two main groups: chemical foams and mechanical foams.
5. Chemical foams are seldom used and have been substituted by mechanical foams.
6. The main advantage of halogenated agents has been the absence of residue.
7. Wet chemicals were specifically worked out for class K fires but they haveshown better effectiveness on class A fires in comparison with plain water.
8. Wet chemicals are solutions that are bases in nature.
9. Dry chemicals have very special characteristics for fire extinguishing.
10. The use of dry chemicals is thought to keep free radicals from linking up to continue the reaction.
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A) Match the words with similar meanings.
1) to replace A) rarely
2) to interrupt B) to demonstrate
3) seldom C) to consider
4) lack D) to substitute
5) to show E) alkali
6) to think F) majority
7) the most of G) absence
8) special H) to break
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9) base I) flexible
10) adaptable J) unique
B) Match the words with opposite meanings.
1) to sustain A) often
2) advantage B expensive
3) superior C) large
4) cheap D) to break
5) rarely E) inferior
6) to accomplish F) disadvantage
7) to break G) to fail
8) unique H) usual
9) small I) to appear
10) to drain out j) to continue
Match the words to the definitions.
1) solution A) a very small piece of something
2) acid B) a type of foam produced by a chemical reaction
3) alkali C) a liquid in which something is dissolved
4) saponification D) a type of foam produced by the mechanical agitation
of a diluted foam compound solution in the presence of
air
5) halogenated E) volatile liquid compounds of the halogens
agents
6) pump F) a chemical, usually a substance that contains oxygen
and has a pH of less than seven
7) mechanical G) a chemical substance that reacts with acids to form a
foam salt and gives a solution with a pH more than seven
when it is dissolved in water
8) chemical foam H) a machine that is used to force liquid, gas, or air into
or out of something
9) nitrogen I) a chemical element with symbol N and atomic
number 7
10) particle J) a process that produces soap, usually from fats and
alkaline substance
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Complete the table using a dictionary. Translate the original and derivative words.
VERBS | PARTICIPLES I, II | NOUNS | ADJECTIVES |
ACCOMPLISH
DELIVER
DISCHARGE
INTERRUPT
INTRODUCE
INSTALL
MIX
SECURE
SOLUTE
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SUPRESS