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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