Chapter 2 Questions Flashcards
Anhydrous, hydrophobic, and hydrophilic are all ways to describe material and its relationships to: A. Acids and bases B. Water C. Heat D. Atmospheric air
B water
What is the term used to describe a material that readily changes to gas? A. Condensate B. Volatile C. Reactive D. Vaporized
B. Volatile
Vapor pressure increases with: A. Volume B. Flammable range C. Release rates D. Temperature
D. Temperature
What is a measure of how heavy a unit volume of a substance is or the mass of a known volume? A. Density B. Odor C. Viscosity D. Appearance
A. Density
Which physical state of matter is generally the least mobile? A. Solids B. Vapors C. Liquids D. Gases
A. Solids
Cryogenic liquids are:
A. Reactive above 32F (0C)
B. Only transported at night
C. Liquefied gases at very low temperatures
D. Asphyxiants with very low expansion ratios when released
C. Liquefied gases at very low temperatures
Emergency responders will typically be at the greatest risk when dealing with a: A. Toxin B. Gas C. Liquid D. Solid
B. Gas
Increasing heat in an object will increase the: A. Molecular weight of the object B. Polarity of the object C. Movement of molecules in the object D. Pressure within the object
C. Movement of molecules in the object
When measuring vapor density, the density of air is equal to: A. 29 B. 0 C. 1 D. 14.7
C. 1
Which atmospheres are particularly dangerous?
A. Atmospheres with high vapor pressure
B. Atmospheres with great molecular weight
C. Atmospheres with freezing temperatures
D. Atmospheres within the flammable range
D. Atmospheres within the flammable range
Once a critical point is reached:
A. Responders must shelter-in-place
B. The atmosphere becomes unbreathable
C. The chemical reaction can not be stopped until he reaction is completed
D. The chemical reaction stops, and the danger has passed
C. The chemical reaction can not be stopped until the reaction is completed
Which of the following does NOT influence the boiling point of a liquid such as water? A. A water soluble substance B. Elevation C. Pressure D. Volume
D. Volume
Which item will act like a gas and be very mobile? A. Compressed solids B. Pressurized liquids C. Aerosol D. Condensate
C. Aerosol
A description of the appearance of a material will normally appear on a: A. Container B. Placard C. Label D. Safety data sheets
D. safety data sheets
How does temperature. Affect evaporation rate?
A. The lower the temperature, the faster the evaporation rate
B. The temperature has no impact on the evaporation rate
C. The higher the temperature, the slower the evaporation rate
D. The higher the temperature, the faster the evaporation rate
D. The higher the temperature, the faster the evaporation rate
A material boils at different temperatures depending on its: A. Polarity B. Freezing point C. Molecular weight D. Altitude
D. Altitude
Hazmat incidents involving gases typically:
A. Include products contained under pressure
B. Are easier to contain than incidents involving liquids
C. Are easier to contain than incidents involving solids
D. Include low activity radioactive materials
A. Include products contained under pressure
How does a liquid present unique challenges to responders?
A. It may be easier to contain than a solid
B. It is transported in pressure containers
C. It is often colorless and/or tasteless
D. It’s vapor has the characteristics of a gas
D. It’s vapor has the characteristics of a gas
What is the lowest temperature at which a liquid can form an ignitable mixture in air near the surface of the liquid and will not support continuous burning? A. Lower explosive limit B. Flammable range C. Fire point D. Flash point
D. Flash point
A chemical reaction cannot be stopped until the reaction is completed after the material reaches any: A. Freezing point B. Melting point C. Critical point D. Boiling point
C. Critical point
The temperature at which a solid turns into a liquid is called its: A. Sublimation point B. Boiling point C. Freezing point D. Melting point
D. Melting point
In the typical relationship between temperature and viscosity:
A. Temperature does not affect viscosity
B. The hotter a liquid, the more fluid it becomes
C. The cooler a liquid, the more fluid it becomes
D. The hotter a liquid, the less fluid it becomes
B. The hotter a liquid, the more fluid it becomes
What is the relationship between temperature and density?
A. Density increases as temperature increases
B. Temperature has no impact on density
C. Density decreases as temperature decreases
D. Density increases as temperature decreases
D. Density increases as temperature decreases
Knowing a material’s state of matter helps responders determine:
A. How to change the material’s state to increase its mobility
B. Control zones and evacuation distances
C. How much of the hazardous material is present
D. The amount of time needed to mitigate the incident
C. Control zones and evacuation distances
Fog, mist, and aerosol act like a \_\_\_\_ and can be very mobile. A. Liquid B. Solid C. Plasma D. Gas
D. Gas
What may be a warning that a substance has escaped form its container? A. Odor B. Specific gravity C. Viscosity D. Density
A. Odor
A solid may have the ability to become airborne and travel with air movement and currents based on its mass and: A. Temperature B. Surface area C. Specific gravity D. Viscosity
B. Surface area
Dry ice is an example of a product that undergoes the process of: A. Freezing B. Boiling C. Evaporation D. Sublimation
D. Sublimation
The U.S. DOT defines a refrigerated liquid having a boiling point lower than -130F (-90C) at 14.7 psi (103 kPa) as a(n): A. Cryogenic liquid B. Compressed gas C. Anhydrous gas D. Sublimation liquid
A. Cryogenic liquid
The ratio of the density of pure gas or vapor to the density of air is called: A. Density B. Specific gravity C. Vapor density D. Viscosity
C. Vapor density
Materials that repel water are: A. Hydrophilic B. Cryogenic C. Hydrophobic D. Anhydrous
C. Hydrophobic
In which state of matter are hazardous materials typically the most challenging to control? A. Solid B. Plasma C. Liquid D. Gas
D. Gas
Due to the relationship between temperature and vapor pressure:
A. Vapor pressure can be increased by venting a container
B. Vapor pressure can be eliminated by venting a container
C. Vapor pressure can be reduced by cooling the product in a container
D. Vapor pressure can be increased by cooling the product in the container
C. Vapor pressure can be reduced by cooling the product in a container
Gas or vapor concentrations will burn rapidly if ignited: A. In their flammable range B. Below their lower flammable limit C. In their condensation range D. Above their upper flammable limit
A. In their flammable range
A material with a specific gravity less than 1 will: A. Explode on contact with water B. Sink in water C. Dissolve on contact with water D. Float on water
D. Float on water
The lower the flash point of a product, the higher the: A. Specific gravity B. Vapor density C. Flammability D. Molecular weight
C. Flammability
A substance’s state of matter is largely dependent on its: A. Appearance B. Temperature C. Density D. Viscosity
B. Temperature
If a material has a low boiling point, one can presume that the flash point will be: A. High B. Moderate C. Unpredictable D. Low
D. Low
