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LLPSD FF1 Chapter 8 Exam with correct Answers
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LLPSD FF1 Chapter 8 Exam with correct Answers
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LLPSD FF1 Chapter 8 Exam with correctAnswers
For an extinguishing agent to be rated for a particular class of fire, it must ______.
a. be effective in portable volumes
b. prevent rekindling
c. be nontoxic
d. be noncorrosive - Answer -b. prevent rekindling
The use of Halon 1211 is strictly controlled because it is _____.
a. harmful to the environment
b. carcinogenic
c. mutagenic
d. a chemical asphyxiant - Answer -a. harmful to the environment
Which feature of some carbon dioxide extinguishers makes them dangerous for use on
Class C fires?
a. steel cylinder
b. metal horn
c. loaded stream
d. external cartridge - Answer -b. metal horn
A class K agent's effect on the fuel is known as _______.
a. dissolution
b. emulsification
c. hydrolyzation
d. saponification - Answer -d. saponification
Which of the following is commonly used as a dry chemical extinguishing agent?
a. carbon tetrachloride
b. potassium hydrate
c. ammonium phosphate
d. calcium bicarbonate - Answer -c. ammonium phosphate
Which statement best summarizes when a dry chemical extinguisher should be serviced
and recharged?
a. after a discharge resulting in loss of 30 percent or pressurization
, b. after a discharge resulting in loss of 10 percent of pressurization
c. after any discharge
d. after a discharge resulting in loss of 20 percent of pressurization - Answer -c. after
any discharge
Bromochlorodifluoromenthane is a ______ agent.
a. class D
b. multipurpose dry chemical
c. halogenated
d. wet chemical - Answer -c. halogenated
What is one disadvantage of CO2 extinguishers?
a. corrosive residue
b. cost
c. electrical conductivity
d. short discharge range - Answer -d. short discharge range
All portable fire extinguishers use which means for expelling their contents?
a. volume
b. gravity
c. pressure
d. vacuum - Answer -c. pressure
Which class of fire involves energized electrical equipment?
a. C
b. B
c. D
d. A - Answer -a. C
How do multipurpose dry chemical agents prevent rekindling of Class A fuel?
a. by attracting and holding moisture
b. by forming a crust over the fuel
c. by penetrating the fuel
d. by interrupting the chemical chain reaction - Answer -b. by forming a crust over the
fuel
Which compound is added to a water extinguisher to improve penetration of fuel?
a. alcohol
b. alkai metal salt
c. a wetting agent
d. bicarbonate - Answer -c. a wetting agent
What does it mean when a fire extinguisher has a pictograph with a red slash through
it?
a. use on that class of fire would be ineffective
b. the fire extinguisher is rated for use on that class of fire
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