TB 5 Auto Fires

Question 1

Approximately ___ of the Department’s fire responses involve motorvehicles.

Answer 1

20%

Question 2

Battery - Explosion hazard due to presence of ___ vapors.

Answer 2

hydrogen

Question 3

When safe, always disconnect battery ____ first. The ground cable can be identified as the one attached to the vehicle body/frame.

Answer 3

ground cable

Question 4

Vapor Canister - Control of emissions from evaporation of fuel has been required in car models since ___.

Answer 4

1970

Question 5

Catalytic Converter - An _____ device located in the vehicle exhaust system just ahead of the muffler.

Answer 5

exhaust emission control

Question 6

The converter uses catalysts to chemically convert undesirable exhaust emissions into ___.

Answer 6

less harmful emissions

Question 7

Catalytic converters can achieve temperatures high enough to ignite ____ that it may contact.

Answer 7

ordinary combustibles

Question 8

Air Conditioners - ____ used in air conditioners is under pressure and may emit the toxic gases _____ if heated to the point of decomposition.

Answer 8

Freon gas / phosgene and fluoride

Question 9

Energy Absorbing Bumpers :
Hydraulic - Consists of a gas chamber filled with a mixture of inert, non-flammable nitrogen/helium gas pressurized to ___ and a hydraulic fluid chamber which is filled with a ____.

Answer 9

150 PSI / petroleum based fluid.

Question 10

Energy Absorbing Bumpers :

These two chambers are separated by a floating piston. Bumper travel is up to ___.

Answer 10

three inches.

Question 11

Energy Absorbing Bumpers :

Mechanical - Employs a heavy spring to absorb impact. These units travel up to ____.

Answer 11

4 inches

Question 12

Avoid the use of a ___ on hydraulic units to preclude possible ignition and injury.

Answer 12

cutting torch

Question 13

Unusually high pressure developing from fire conditions may result in the sudden release of the bumper assembly causing serious injury to personnel. At an incident in the valley, a bumper assembly traveled a distance of ___.

Answer 13

25 feet

Question 14

Fuel Tanks

Metal - ___ with crimped and welded seams

Answer 14

Sheet metal

Question 15

Fuel Tanks

Plastic - Molded high-density ____ or similar material.

Answer 15

polyethylene

Question 16

Gasoline : Flash point

Answer 16

-45ºF

Question 17

Gasoline : Specific Gravity

Answer 17

0.8

Question 18

Gasoline : Water Soluble

Answer 18

No

Question 19

Diesel : Flash point

Answer 19

125ºF

Question 20

Diesel : Specific Gravity

Answer 20

Less than 1.0

Question 21

Diesel : Water Soluble

Answer 21

No

Question 22

Dilution: ____ wash fuel spills into storm drains.

Answer 22

NEVER

Question 23

If fuel has already entered the drainage system, attempt to dilute the product by flushing with ____.

Answer 23

copious amounts of water

Question 24

Working within ___ of any vehicle fire constitutes working in an IDLH.

Answer 24

30 feet

Question 25

The effective range of a 20 pound extinguisher is ____.

Answer 25

15 to 20 feet.

Question 26

Backdraft: Explosion resulting from the ____ into a confined space/area that is both pressurized with heated flammable gases and deficient in oxygen.

Answer 26

introduction of oxygen

Question 27

Flashover: ____ of combustible gases and/or combustible surfaces in an involved area resulting in a Sudden and intense rise in temperature.

Answer 27

Sudden ignition

Question 28

The hazard of a BLEVE is an important consideration when addressing fires in vehicles utilizing _____

Answer 28

Liquified Petroleum Gases (LPG).

Question 29

The LPG storage cylinder is usually found on the ____. The storage tank may be found in the vehicle interior if properly sealed and separated from passenger compartment.

Answer 29

exterior of the vehicle on either side or the rear

Question 30

A pressure relief valve is required at the storage cylinder. Allow the relief valve to operate as designed. If the vapors coming from the relief valve have been ignited, allow the LPG to burn and _____.

Answer 30

protect exposures.

Question 31

Recorded BLEVES have occurred within ___ of fire exposure.

Answer 31

10 minutes

Question 32

LPG is ____ than air. It tends to settle into low lying and confined areas such as garages.

Answer 32

heavier

Question 33

The vapor cloud is ___ but cannot be used to accurately define flammable perimeters.

Answer 33

visible

Question 34

Combustible Metals Some vehicles have various parts constructed of combustible metals, such as engine ____.

Answer 34

blocks, heads, wheels, headlight casings, etc.

Question 35

Combustible Metals :

These metals are normally an alloy of ____.

Answer 35

aluminum and magnesium.

Question 36

Combustible Metals :

Most of the So called “mag” wheels are an ____ and do not contain magnesium.

Answer 36

aluminum alloy

Question 37

Magnesium combines so readily with oxygen that under some conditions, water that is used as the extinguishing agent may be decomposed into its constituent elements of _____.

Answer 37

oxygen and hydrogen

Question 38

Magnesium : The released hydrogen will add to the ___ of the fire.

Answer 38

intensity

Question 39

Vehicle Extrication :

A safe ___ minimum working area must be established.

Answer 39

30’

Question 40

Vehicle Extrication :

The Engine Company Captain will normally assume the role of ___.

Answer 40

Safety Officer.

Question 41

Vehicle Extrication :

Engineers: Traffic control and _____.

Answer 41

secondary water supply