Student Name:    
Student Email:

If you would like to send your results to your instructor,
please enter their email address below.

Instructor Email: 



FFHB - Chapter 29

True/False
Indicate whether the sentence or statement is true or false.
 

 1. 

A method of diversion is to dig a trench alongside the waterway to collect the spilled material off the top of the water.
 

 2. 

When digging retention areas, you should be aware of underground utilities.
 

 3. 

The shutting off of valves is usually a tactic used by first responders. On some tank trucks and fixed facilities there are remote shutoffs.
 

 4. 

A catalytic bead is a crystal-filled tube that changes colors in the presence of the intended gases.
 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 5. 

During a product control operations, firefighters discover that the spilled product is floating on top of the body of water. What type of dam will they need to create to control the spread of the product?
a.
an overflow dam
d.
a retention dam
b.
an absorption dam
e.
a diverting dam
c.
an underflow dam
 

 6. 

Multigas detectors sample for oxygen levels, a lower explosive limit (LEL), and two to three toxic gases, usually ____ and hydrogen sulfide.
a.
carbon dioxide
d.
carbon monoxide
b.
vesicants
e.
hydrocarbons
c.
sulfur
 

 7. 

An oxygen concentration of lower than ____ is considered oxygen deficient and a health risk.
a.
15%
d.
19.5%
b.
16.5%
e.
20.9%
c.
18%
 

 8. 

An oxygen concentration of more than ____ is considered to be a fire risk.
a.
18%
d.
21.4%
b.
19.5%
e.
23.5%
c.
20.9%
 

 9. 

Carbon monoxide is acutely toxic at high levels, typically at levels in excess of ____.
a.
50 ppm
d.
200 ppm
b.
75 ppm
e.
500 ppm
c.
100 ppm
 

 10. 

Normal air contains 20.9 % oxygen. Below ____ is considered oxygen deficient and above ____ is considered a fire risk.
a.
18%, 22%
c.
10.5 %, 25.5%
b.
18.5%, 24.5%
d.
19.5%, 23.5%
 



 
Submit          Reset Help