Hazardous Materials Awareness and Operations Chapter 2 ...
Hazardous Materials Awareness and Operations
Chapter 2: Hazardous Materials: Properties and Effects
Chapter 2
Multiple Choice
1. The measurable characteristics of a chemical are called __________ properties.
A. molecular
B. empirical
C. reactivity
D. physical
Answer: D
Objective: NFPA 472, 5.2.3(1)(a); Level: Operations
Subject: Introduction; Chapter 2; Page 20
Complexity: Easy
2. A(n) ________ change occurs when a chemical undergoes a change at the molecular
level, usually with a release of some form of energy.
A. physical
B. electrical
C. morphological
D. chemical
Answer: D
Objective: NFPA 472, 5.2.3(1)(a); Level: Operations
Subject: Physical and Chemical Changes; Chapter 2; Page 21
Complexity: Easy
3. Rusting is an example of what type of change?
A. Chemical
B. Physical
C. Mechanical
D. Combustive
Answer: A
Objective: NFPA 472, 5.2.3(1)(a); Level: Operations
Subject: Physical and Chemical Changes; Chapter 2; Page 21
Complexity: Easy
Copyright ? 2016 by Jones & Bartlett Learning, LLC, an Ascend Learning Company, and the National Fire Protection Association?
Hazardous Materials Awareness and Operations
Chapter 2: Hazardous Materials: Properties and Effects
4. What is the expansion ratio of propane?
A. 27:1
B. 80:1
C. 120:1
D. 270:1
Answer: D
Objective: NFPA 472, 5.2.3(1)(a)i; Level: Operations
Subject: Physical and Chemical Changes; Chapter 2; Page 21
Complexity: Easy
5. What is the flash point of gasoline?
A. ?80¡ãF
B. ?45¡ãF
C. 25¡ãF
D. 75¡ãF
Answer: B
Objective: NFPA 472, 5.2.3(1)(a)v; Level: Operations
Subject: Physical and Chemical Changes; Chapter 2; Page 23
Complexity: Easy
6. What is the approximate flash point of diesel fuel?
A. 120¡ãF
B. 240¡ãF
C. 360¡ãF
D. 485¡ãF
Answer: A
Objective: NFPA 472, 5.2.3(1)(a)v; Level: Operations
Subject: Physical and Chemical Changes; Chapter 2; Page 23
Complexity: Easy
7. How would a fuel/air mixture in which there is too much fuel be described?
A. Too lean
B. Condensed
C. Too rich
D. Saturated
Copyright ? 2016 by Jones & Bartlett Learning, LLC, an Ascend Learning Company, and the National Fire Protection Association?
Hazardous Materials Awareness and Operations
Chapter 2: Hazardous Materials: Properties and Effects
Answer: C
Objective: NFPA 472, 5.2.3(1)(a)iv; Level: Operations
Subject: Physical and Chemical Changes; Chapter 2; Page 23
Complexity: Moderate
8. How is flammable range related to the relative danger of a substance?
A. The higher the bottom number, the more dangerous the substance is.
B. The narrower the range, the more dangerous the substance is.
C. The wider the range, the more dangerous the substance is.
D. There is no relationship between these quantities.
Answer: C
Objective: NFPA 472, 5.2.3(1)(a)iv; Level: Operations
Subject: Physical and Chemical Changes; Chapter 2; Page 24
Complexity: Moderate
9. What does it mean if a substance¡¯s vapor density is 2.3?
A. It will float in air.
B. It has a relatively high boiling point.
C. It has an extraordinarily high boiling point.
D. It will sink in air.
Answer: D
Objective: NFPA 472, 5.2.3(1)(a)xiii; Level: Operations
Subject: Physical and Chemical Changes; Chapter 2; Page 25
Complexity: Moderate
10. What mnemonic helps fire fighters remember a set of lighter-than-air gases?
A. 4H MED FLIGHT
B. 4H MEDIC ANNA
C. 4H TONIC
D. 4H TEST
Answer: B
Objective: NFPA 472, 5.2.3(1)(a)xiii; Level: Operations
Subject: Physical and Chemical Changes; Chapter 2; Page 26
Complexity: Easy
Copyright ? 2016 by Jones & Bartlett Learning, LLC, an Ascend Learning Company, and the National Fire Protection Association?
Hazardous Materials Awareness and Operations
Chapter 2: Hazardous Materials: Properties and Effects
11. Normal temperature and pressure (NTP) for vapor pressures assume a standard
ambient temperature of:
A. 0¡ãC.
B. 20¡ãC.
C. 70¡ãC.
D. 100¡ãC.
Answer: B
Objective: NFPA 472, 5.2.3(1)(a)xiv; Level: Operations
Subject: Physical and Chemical Changes; Chapter 2; Page 24
Complexity: Moderate
12. __________ is to liquids as vapor density is to gases.
A. Specific gravity
B. Volatility
C. Viscosity
D. Molecular weight
Answer: A
Objective: NFPA 472, 5.2.3(1)(a)xi; Level: Operations
Subject: Physical and Chemical Changes; Chapter 2; Page 26
Complexity: Easy
13. What will a liquid with a specific gravity of 0.7 do in water?
A. Float on top
B. Sink to the bottom
C. Mix
D. Dissolve
Answer: A
Objective: NFPA 472, 5.2.3(1)(a)xi; Level: Operations
Subject: Physical and Chemical Changes; Chapter 2; Page 26
Complexity: Moderate
14. Corrosives can be broken down into:
A. polars and nonpolars.
B. chlorine-based and hydrogen-based corrosives.
C. acids and bases.
D. liquids and solids.
Copyright ? 2016 by Jones & Bartlett Learning, LLC, an Ascend Learning Company, and the National Fire Protection Association?
Hazardous Materials Awareness and Operations
Chapter 2: Hazardous Materials: Properties and Effects
Answer: C
Objective: NFPA 472, 5.2.3(1)(a)iii; Level: Operations
Subject: Physical and Chemical Changes; Chapter 2; Page 28
Complexity: Easy
15. At what pH is a substance neither acidic nor basic?
A. 0
B. 1
C. 7
D. 15
Answer: C
Objective: NFPA 472, 5.2.3(1)(a)ii; Level: Operations
Subject: Physical and Chemical Changes; Chapter 2; Page 27, 28
Complexity: Easy
16. How is the LD 50 typically expressed?
A. Milligrams per kilogram
B. Milligrams per cubic meter
C. Milligrams per liter
D. Parts per million
Answer: A
Objective: NFPA 472, 5.2.2(3)(c); Level: Operations
Subject: Chronic and Acute Health Effects; Chapter 2; Page 38
Complexity: Moderate
17. Which term refers to the residue of a chemical that has been released and has come
into contact with people, the environment, and animals?
A. Infection
B. Transfer
C. Exposure
D. Contaminant
Answer: D
Objective: NFPA 472, 5.2.3(1)(b)ii; Level: Awareness
Subject: Hazard, Exposure, and Contamination; Chapter 2; Page 31
Complexity: Easy
Copyright ? 2016 by Jones & Bartlett Learning, LLC, an Ascend Learning Company, and the National Fire Protection Association?
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