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Chapter 7 Portable Fire Extinguishers exam with 100% complete solutions, Exams of Nursing

University of Texas - ArlingtonNursing

Chapter 7 Portable Fire Extinguishers exam with 100% complete solutions

Typology: Exams

2024/2025

Available from 12/30/2024

michael-abonyo
michael-abonyo 🇺🇸

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Chapter 7 Portable Fire
Extinguishers exam with 100%
complete solutions
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
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
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.
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
5. For an extinguishing agent to be approved for use on energized electrical
equipment, it must:
A) not conduct electricity.
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Partial preview of the text

Download Chapter 7 Portable Fire Extinguishers exam with 100% complete solutions and more Exams Nursing in PDF only on Docsity!

Chapter 7 Portable Fire

Extinguishers exam with 100%

complete solutions

  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
  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
  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.
  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
  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.

  1. 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)
  2. 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
  3. 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.
  4. 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
  5. Which is a disadvantage of CO2 extinguishers? A) Electrical conductivity B) Cost C) Short discharge range D) Corrosive residue - ANSWER-C) Short discharge range
  6. A Class K agent's effect on the fuel is known as:

B) A dry powder is compatible with foam; a dry chemical is not. C) A dry powder is harmful to the environment; a dry chemical is not. D) Each is rated for a different class of fire. - ANSWER-D) Each is rated for a different class of fire.

  1. If a private residence has a single fire extinguisher, where should it be located? A) Garage B) Near the bedrooms C) Kitchen D) Laundry area - ANSWER-C) Kitchen
  2. All portable fire extinguishers use which means for expelling their contents? A) Volume B) Vacuum C) Pressure D) Gravity - ANSWER-C) Pressure
  3. For the purpose of extinguisher selection and placement, what is an example of a light hazard environment? A) Self-storage building B) Classroom C) Parking garage D) Restaurant kitchen - ANSWER-B) Classroom
  4. The production and use of Halon extinguishing agents is limited because they are: A) mutagenic. B) harmful to the earth's ozone layer. C) a chemical asphyxiant. D) carcinogenic. - ANSWER-B) harmful to the earth's ozone layer.
  5. Bromochlorodifluoromethane is a _________ agent. A) halon B) wet chemical C) Class D D) multipurpose dry chemical - ANSWER-A) halon
  1. Which statement best summarizes when a dry chemical extinguisher should be serviced and recharged? A) After any discharge B) After a discharge resulting in loss of 10 percent of pressurization C) After a discharge resulting in loss of 20 percent of pressurization D) After a discharge resulting in loss of 30 percent of pressurization - ANSWER-A) After any discharge
  2. A Class B foam extinguisher is effective on all of the following fuels except one. Choose the exception. A) Gasoline B) Diesel fuel C) Cooking oil D) Paint thinner - ANSWER-C) Cooking oil
  3. The traditional symbol for a Class D fire extinguisher is a(n): A) orange circle. B) blue square. C) yellow star. D) green triangle. - ANSWER-C) yellow star.
  4. Which is a primary factor when determining hazard classification for extinguisher selection and placement? A) Permissible occupancy load B) Construction type C) Presence of a sprinkler system D) Amount of combustibles present - ANSWER-D) Amount of combustibles present
  5. The weight of carbon dioxide is about ___________ times the weight of air. A) 0. B) 1. C) 1. D) 2.0 - ANSWER-C) 1.
  6. What is the primary extinguishing mechanism of halogenated agents? A) Suppressing vapor production B) Forming a crust over the fuel C) Disrupting the molecular chain reaction
  1. For the purpose of extinguisher selection and placement, a woodworking shop is a(n) __________ hazard environment. A) light B) moderate C) ordinary D) extra - ANSWER-D) extra
  2. Which is a common dry chemical extinguishing agent? A) Calcium bicarbonate B) Carbon tetrachloride C) Potassium hydrate D) Potassium chloride - ANSWER-D) Potassium chloride
  3. 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) Use on that class of fire could be unsafe C) The fire extinguisher has not been tested for use on that class of fire D) The fire extinguisher is rated for use on that class of fire - ANSWER-B) Use on that class of fire could be unsafe
  4. How do multipurpose dry chemical agents prevent rekindling of Class A fuel? A) By forming a crust over the fuel B) By penetrating the fuel C) By attracting and holding moisture D) By interrupting the chemical chain reaction - ANSWER-A) By forming a crust over the fuel
  5. What expels the extinguishing agent from a pump tank water extinguisher? A) Manual effort B) Pressure cartridge C) Compressed air D) Gravity - ANSWER-A) Manual effort
  6. In general, the maximum discharge range of a CO2 extinguisher is: A) 33 ft (10 m). B) 16 ft (5 m). C) 8 ft (2.5 m).

D) 5 ft (1.5 m). - ANSWER-C) 8 ft (2.5 m).

  1. Class D agents work primarily by: A) penetrating the fuel. B) forming a crust over the fuel. C) suppressing vapor production. D) inhibiting the chemical chain reaction. - ANSWER-B) forming a crust over the fuel.
  2. Which class of fire includes flammable and combustible liquids? A) A B) B C) C D) D - ANSWER-B) B
  3. For an extinguishing agent to be rated for a particular class of fire, it must: A) be effective in portable volumes. B) be noncorrosive. C) be nontoxic. D) prevent rekindling. - ANSWER-D) prevent rekindling.
  4. What is the best way to extinguish a Class C fire? A) Withdraw to a safe distance and let the fire burn itself out B) Shut off the power and treat it as a Class A or B fire C) Use a Class C extinguisher D) Shut off the fuel flow at a valve - ANSWER-B) Shut off the power and treat it as a Class A or B fire
  5. Which statement is correct regarding Class D extinguishing agents? A) Application methods are similar regardless of the agent and fuel involved. B) The specific agent must be matched to the specific fuel. C) Most agents are effective on several Class D fuels. D) Some agents are also rated for other classes of fire. - ANSWER-B) The specific agent must be matched to the specific fuel.
  6. For the purpose of extinguisher selection and placement, light hazard environments may contain a limited amount of combustibles of which class? A) K
  1. When approaching a fire with an extinguisher in hand, you should always have a(n): A) exit route. B) backup unit. C) light source. D) portable radio. - ANSWER-A) exit route.
  2. Which agent is rated for use on Class A fires? A) Potassium chloride B) Potassium bicarbonate C) Ammonium phosphate D) Sodium bicarbonate - ANSWER-C) Ammonium phosphate
  3. Which extinguishing agent is approved for use in a Class K system? A) Wet chemical B) Aqueous film-forming foam C) Carbon dioxide D) Dry chemical - ANSWER-A) Wet chemical
  4. The hydrostatic test interval for a dry chemical extinguisher with a stainless-steel shell is every _____ years. A) 3 B) 5 C) 10 D) 12 - ANSWER-B) 5
  5. Which class of fire includes combustible cooking oils and fats? A) K B) A C) B D) D - ANSWER-A) K
  6. Requirements for placing and mounting portable fire extinguishers are found in NFPA: A) 10. B) 170. C) 470. D) 1201. - ANSWER-A) 10.
  7. Which hazard category includes automotive service or repair facilities?

A) Severe B) Moderate C) Ordinary D) Extra - ANSWER-D) Extra

  1. Which class of fire extinguisher includes a number in its classification? A) A B) C C) D D) K - ANSWER-A) A
  2. Which part of a fire extinguisher contains the extinguishing agent? A) Cartridge B) Horn C) Chamber D) Cylinder - ANSWER-D) Cylinder
  3. What is the most commonly used extinguishing agent for Class A fires? A) Water B) Ammonium phosphate C) Dry chemical D) Potassium bicarbonate - ANSWER-A) Water
  4. Which class of fire is depicted in the pictograph system by a flame and an electrical plug and socket? A) K B) B C) C D) D - ANSWER-C) C
  5. Which is used to pressurize a stored-pressure water extinguisher? A) Air B) Argon C) Water D) Carbon dioxide - ANSWER-A) Air
  6. Which class of fire is depicted in the pictograph system by a burning trash can next to a wood fire? A) A B) B

D) A wetting agent - ANSWER-D) A wetting agent

  1. Which statement about dry chemical agents is correct? A) Dry chemical agents are noncorrosive. B) Dry chemical agents are compatible with all types of foam. C) All dry chemical agents have a multipurpose rating. D) Dry chemical agents are not subject to freezing. - ANSWER-D) Dry chemical agents are not subject to freezing.
  2. Which class of fire includes combustible metals? A) K B) A C) B D) D - ANSWER-D) D
  3. Which motion best accomplishes the removal of the pin and tamper seal from a portable fire extinguisher? A) A strong pull directly outward B) Twisting motion C) Side-to-side motion D) Push, then pull - ANSWER-B) Twisting motion
  4. Combustion begins when a fuel is heated to its: A) flash point. B) lower flammable limit. C) fire point. D) ignition temperature. - ANSWER-D) ignition temperature.
  5. Which fire extinguishing agent is best for use on sensitive electronic equipment? A) Loaded stream B) Carbon dioxide C) Aqueous film-forming foam (AFFF) D) Ammonium phosphate - ANSWER-B) Carbon dioxide