CHAPTER 7 PORTABLE FIRE EXTINGUISHERS Questions with Correct
Solutions
Question:
1. 1. Which class of fire is depicted in the pictograph system by a fire in a frying pan?
A) K
B) B
C) C
D) D
Answer:
A) K
Question:
2. 2. Which test is required to measure the ability of an extinguisher cylinder to withstand
steady internal pressure?
A) Static
B) Pneumatic
C) Fatigue
D) Hydrostatic
Answer:
D) Hydrostatic
Question:
3. 3. The "P" in the acronym PASS, used in reference to fire extinguisher operation, stands
for:
A) point.
B) pick.
C) pause.
D) pull.
Answer:
D) pull.
Question:
4. 4. What is the term for the substance that puts out the fire?
A) Propellant
B) Extinguishing agent
C) Dry charge
D) Live load
Answer:
B) Extinguishing agent
,Question:
5. 5. For an extinguishing agent to be approved for use on energized electrical equipment, it
must:
A) not conduct electricity.
B) leave no residue.
C) be non-corrosive.
D) be safe for use in a closed room.
Answer:
A) not conduct electricity.
Question:
6. 6. A Class A fire extinguisher with a numerical rating of 2 contains _____ of water.
A) 1.0 gal (3.8 L)
B) 1.5 gal (5.7 L)
C) 2.0 gal (7.6 L)
D) 2.5 gal (9.5 L)
Answer:
D) 2.5 gal (9.5 L)
Question:
7. 7. What does a rating of 40 on a Class B extinguisher mean?
A) BTU absorption comparable to 40 gallons (150 L) of water
B) Sufficient extinguishing power for 40 ft² (4.7 m²) of burning fuel
C) Sufficient extinguishing power for 40 gallons (150 L) of burning fuel
D) Discharge duration of at least 40 seconds
Answer:
B) Sufficient extinguishing power for 40 ft² (4.7 m²) of burning fuel
Question:
8. 8. A potential problem with application of a multipurpose dry chemical agent to a Class K
fire is:
A) counteraction of other agents applied to the fire.
B) production of toxic gas.
C) spitting and splattering of fuel.
D) sudden flare-up of the fire.
Answer:
A) counteraction of other agents applied to the fire.
, Question:
9. 9. Which extinguishing method is being used when a foam blanket is placed over the
surface of a burning liquid?
A) Cutting off the oxygen supply
B) Inhibiting the chemical chain reaction
C) Diluting the fuel
D) Cooling the fuel
Answer:
A) Cutting off the oxygen supply
Question:
10. 10. Which is a disadvantage of CO2 extinguishers?
A) Electrical conductivity
B) Cost
C) Short discharge range
D) Corrosive residue
Answer:
C) Short discharge range
Question:
11. 11. A Class K agent's effect on the fuel is known as:
A) emulsification.
B) saponification.
C) dissolution.
D) hydrolyzation.
Answer:
B) saponification.
Question:
12. 12. Which class of fire is depicted in the pictograph system by a flame and gasoline can?
A) A
B) B
C) C
D) D
Answer:
B) B
Solutions
Question:
1. 1. Which class of fire is depicted in the pictograph system by a fire in a frying pan?
A) K
B) B
C) C
D) D
Answer:
A) K
Question:
2. 2. Which test is required to measure the ability of an extinguisher cylinder to withstand
steady internal pressure?
A) Static
B) Pneumatic
C) Fatigue
D) Hydrostatic
Answer:
D) Hydrostatic
Question:
3. 3. The "P" in the acronym PASS, used in reference to fire extinguisher operation, stands
for:
A) point.
B) pick.
C) pause.
D) pull.
Answer:
D) pull.
Question:
4. 4. What is the term for the substance that puts out the fire?
A) Propellant
B) Extinguishing agent
C) Dry charge
D) Live load
Answer:
B) Extinguishing agent
,Question:
5. 5. For an extinguishing agent to be approved for use on energized electrical equipment, it
must:
A) not conduct electricity.
B) leave no residue.
C) be non-corrosive.
D) be safe for use in a closed room.
Answer:
A) not conduct electricity.
Question:
6. 6. A Class A fire extinguisher with a numerical rating of 2 contains _____ of water.
A) 1.0 gal (3.8 L)
B) 1.5 gal (5.7 L)
C) 2.0 gal (7.6 L)
D) 2.5 gal (9.5 L)
Answer:
D) 2.5 gal (9.5 L)
Question:
7. 7. What does a rating of 40 on a Class B extinguisher mean?
A) BTU absorption comparable to 40 gallons (150 L) of water
B) Sufficient extinguishing power for 40 ft² (4.7 m²) of burning fuel
C) Sufficient extinguishing power for 40 gallons (150 L) of burning fuel
D) Discharge duration of at least 40 seconds
Answer:
B) Sufficient extinguishing power for 40 ft² (4.7 m²) of burning fuel
Question:
8. 8. A potential problem with application of a multipurpose dry chemical agent to a Class K
fire is:
A) counteraction of other agents applied to the fire.
B) production of toxic gas.
C) spitting and splattering of fuel.
D) sudden flare-up of the fire.
Answer:
A) counteraction of other agents applied to the fire.
, Question:
9. 9. Which extinguishing method is being used when a foam blanket is placed over the
surface of a burning liquid?
A) Cutting off the oxygen supply
B) Inhibiting the chemical chain reaction
C) Diluting the fuel
D) Cooling the fuel
Answer:
A) Cutting off the oxygen supply
Question:
10. 10. Which is a disadvantage of CO2 extinguishers?
A) Electrical conductivity
B) Cost
C) Short discharge range
D) Corrosive residue
Answer:
C) Short discharge range
Question:
11. 11. A Class K agent's effect on the fuel is known as:
A) emulsification.
B) saponification.
C) dissolution.
D) hydrolyzation.
Answer:
B) saponification.
Question:
12. 12. Which class of fire is depicted in the pictograph system by a flame and gasoline can?
A) A
B) B
C) C
D) D
Answer:
B) B
