LLPSD FF1 Chapter 8 UPDATED ACTUAL
Exam Questions and CORRECT Answers
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 - CORRECT 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 - CORRECT 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 - CORRECT ANSWER- b. metal horn
A class K agent's effect on the fuel is known as _______.
a. dissolution
b. emulsification
c. hydrolyzation
d. saponification - CORRECT 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 - CORRECT 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 - CORRECT ANSWER-
c. after any discharge
Bromochlorodifluoromenthane is a ______ agent.
a. class D
b. multipurpose dry chemical
c. halogenated
d. wet chemical - CORRECT ANSWER- c. halogenated
What is one disadvantage of CO2 extinguishers?
a. corrosive residue
b. cost
c. electrical conductivity
d. short discharge range - CORRECT ANSWER- d. short discharge range
All portable fire extinguishers use which means for expelling their contents?
a. volume
, b. gravity
c. pressure
d. vacuum - CORRECT ANSWER- c. pressure
Which class of fire involves energized electrical equipment?
a. C
b. B
c. D
d. A - CORRECT 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 - CORRECT 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 - CORRECT 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
c. the fire extinguisher has not been tested for use on that class of fire
Exam Questions and CORRECT Answers
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 - CORRECT 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 - CORRECT 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 - CORRECT ANSWER- b. metal horn
A class K agent's effect on the fuel is known as _______.
a. dissolution
b. emulsification
c. hydrolyzation
d. saponification - CORRECT 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 - CORRECT 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 - CORRECT ANSWER-
c. after any discharge
Bromochlorodifluoromenthane is a ______ agent.
a. class D
b. multipurpose dry chemical
c. halogenated
d. wet chemical - CORRECT ANSWER- c. halogenated
What is one disadvantage of CO2 extinguishers?
a. corrosive residue
b. cost
c. electrical conductivity
d. short discharge range - CORRECT ANSWER- d. short discharge range
All portable fire extinguishers use which means for expelling their contents?
a. volume
, b. gravity
c. pressure
d. vacuum - CORRECT ANSWER- c. pressure
Which class of fire involves energized electrical equipment?
a. C
b. B
c. D
d. A - CORRECT 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 - CORRECT 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 - CORRECT 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
c. the fire extinguisher has not been tested for use on that class of fire
