TB 4: Gasoline Tank Truck-Trailer Incidents

Question 1

Tank trucks transport approximately ____of all the fuels used by vehicles.

Answer 1

90%

Question 2

Primary consideration of emergency responders shall be the preservation of ____, in that order.

Answer 2

life, property, and the environment

Question 3

Single tank truck with two axles ___ gallons or three axles ____ gallons

Answer 3

3,000
5,000

Question 4

Tank tractor with a semi-trailer connected together by a fifth-wheel. One tank approximately 40 feet long with a capacity of _____gallons.

Answer 4

9,000

Question 5

Tank truck pulling a two-axle trailer: Each truck and trailer tank is approximately 20 feet long. The capacity of the truck tank is 4,200 gallons and the trailer tank is 4,800 gallons (Figure 4) for a total of 9000 gallons.

Question 6

Features of non-pressure liquid tanks that may assist in identification:

Answer 6

• Aluminum tank
• Elliptical shaped tank ends
• Longitudinal roll-over protection along the top of the tank
• Plumbing and valves for off-loading located under the tank
• Vapor recovery plumbing on right rear of tank (not present on all vehicles)
• Manhole assemblies and vapor recovery valves on top of the truck for each compartment

Question 7

The tank wall is thickest at the bottom ____ and gradually gets thinner as you progress toward the top of the tank.

Answer 7

3/16”

Question 8

This is why these tanks must be off-loaded ____ to being righted.

Answer 8

prior

Question 9

Double bulkheads are required when carrying flammable products with _____ in the same tank

Answer 9

different flash points

Question 10

The individual compartments of these large capacity trucks are generally either ____.

Answer 10

full or empty.

Question 11

The best way to determine the amount of product left in these trucks is to gather information from the driver or consult the _____.

Answer 11

shipper’s manifest

Question 12

Construction and design features allow for early tank failure at relatively low temperatures with pressure relief devices designed to maintain_____.

Answer 12

3 to 5 psi.

Question 13

Leak, No Fire: • Eliminate potential ignition sources a minimum of _____ from the spill.

Answer 13

100 feet

Question 14

Reapply foam as needed to maintain ____.

Answer 14

visible blanket.

Question 15

Never direct cooling stream into flames or cargo tank, this will cause the burning fuel to ____.

Answer 15

overflow and spread the fire

Question 16

LAFD foam tenders carry _____ gallons of class B foam,

Answer 16

1000

Question 17

When a defensive attack is employed the idea is to let the fire____. Aluminum tanks will melt at about _____ and the exposed fuel will burn at the liquid level.

Answer 17

burn itself out
1,200°F

Question 18

Gasoline will burn at the rate of about ___per hour

Answer 18

one foot

Question 19

NEVER ATTEMPT TO ____ ANY TANK TRUCK/TRAILER BEFORE IT IS OFF-LOADED.

Answer 19

UPRIGHT

Question 20

Disconnection of tow bar shall only be performed by trained _____ and only after ________.

Answer 20

heavy wrecker personnel
product off-loading

Question 21

_____ 20-ton commercial towing wreckers are required for all up-righting operations.

Answer 21

2

Question 22

method of off-loading an overturned tanker. This method is accomplished by drilling a _____hole in the ALUMINUM tank with a pneumatic drill.

Answer 22

four-inch

Question 23

LAFD ______ shall handle all product off-loading (stinger operations).

Answer 23

Haz-mat companies

Question 24

______ of the vehicle involved in the truck/trailer rollover is legally responsible for product removal and cleanup of any spill on State highways, freeways or city streets.

Answer 24

`The owner

Question 25

The ____ has authority over Hazardous Materials incidents on State roadways.

Answer 25

CHP

Question 26

_____ is responsible for clean-up of State highways/freeways and has the authority to order and pay for clean-up operations

Answer 26

CalTrans

Question 27

Vacuum trucks are available in multiple sizes, but _____ capacities are available from most hazardous materials waste haulers.

Answer 27

2,500 and 5,000 gallon

Question 28

Vacuum trucks can only hold approximately ___of their rated capacity depending on product weigh

Answer 28

90%

Question 29

Vapors are directed a minimum of ____ downwind and downhill from any ignition source.

Answer 29

50 feet

Question 30

SHEAR SECTION: A machined groove which reduces the wall thickness of an outlet valve or adjacent piping by at least _____

Answer 30

20 percent

Question 31

____ The code of Federal Regulations for Motor Carrier of flammable and combustible liquids for low pressure tanks.

Answer 31

MC306: