Health & SafetyAnswer Key

Diking Hazmat

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QUESTION 1

When determining the type of dam to use to control a spill, responders need to consider the:

ANSWER

specific gravity of the material

QUESTION 2

which statement is correct concerning the proper procedure for dilution of a spill

ANSWER

dilution may be effective when combined with other contaminations

QUESTION 3

Actions taken to confine a product release to a limited area performed remotely, are considered to be:

ANSWER

defensive strategies

QUESTION 4

_____ is comprised of those procedures taken to keep a material in a defined or local area.

ANSWER

Confinement

QUESTION 5

An advantage of confinement operations is the:

ANSWER

direct exposure of personnel is avoided

QUESTION 6

The purpose of vapor suppression is to:

ANSWER

reduce the emission of vapors

QUESTION 7

Defensive control techniques that operations level personnel are permitted to engage in are:

ANSWER

dike, dam, diversion, and retention

QUESTION 8

A process by which a hazardous liquid flow is redirected away from an area is called:

ANSWER

diversion

QUESTION 9

Diversion, diking, and retention are all techniques used in:

ANSWER

confinement

QUESTION 10

Diking, damming, and diverting are ____ options available for ____ control.

ANSWER

defensive, spill

QUESTION 11

As a first responder trained to the operations level, which spill control tactics can be conducted?

ANSWER

isolate and deny entry

QUESTION 12

At a spill, defensive actions should include:

ANSWER

diking or remote closing a valve

QUESTION 13

In some situations, it may be safe and acceptable for Operations-Level responders to operate emergency remote shutoff valves on cargo tank trucks. This remote shut off on a MC/DOT 306/406 will be located at the:

ANSWER

left front corner

QUESTION 14

Which is a true statement regarding the safety precautions of remote shutoffs?

ANSWER

They are usually well marked in red and in an-easy-to-find location.

QUESTION 15

Which statement is true regarding vapor dispersion?

ANSWER

The runoff may need to be contained.

QUESTION 16

At which level can responders operate shutoff valves at the fixed facility when trained to do so?

ANSWER

Operations

QUESTION 17

Which may be applied with dry chemical agents?

ANSWER

Aqueous Film Forming Foam

QUESTION 18

What determines the spill-control method needed to control it?

ANSWER

Type of release

QUESTION 19

What should be done if it is determined that products of combustion present fewer hazards than the leaking chemical?

ANSWER

Protect exposures and allow it to burn

QUESTION 20

Which is a correct statement about undertaking spill-control actions?

ANSWER

Only if tasks can be performed without direct contact with the hazmat

QUESTION 21

Which is used primarily to flood confined spaces?

ANSWER

High-expansion foam

QUESTION 22

What can be looked for on has service intermodal containers when searching for a way to activate and emergency shutoff?

ANSWER

Metal cable running down one side

QUESTION 23

Which is more often used during decontamination at a hazmat incident?

ANSWER

Dilution

QUESTION 24

Which is a defensive spill-control tactic that aims to confine the hazardous material?

ANSWER

Diversion

QUESTION 25

Which should be done last when performing remote valve shut off or activating the emergency shutoff device?

ANSWER

Notify the Incident Commander of the completed objective

QUESTION 26

What types of operations are spill control generally?

ANSWER

Defensive

QUESTION 27

With which type of releases will the spill material be covered with a tarp or salvage cover?

ANSWER

Solid surface

QUESTION 28

What is a peimary consideration during spill control operations?

ANSWER

Responders' safety

QUESTION 29

What can be used to direct/control gases during hazmat operations?

ANSWER

Water streams

QUESTION 30

What should be done first when excavation equipment breaks through underground pipes?

ANSWER

Contact the utility company

QUESTION 31

Which is used to reduce the emission of vapors at a hazardous materials spill?

ANSWER

Vapor suppresion

QUESTION 32

Beginning with which level of responder, under safe and acceptable circumstances, can the emergency remote shutoff devices be operated on cargo tank trucks?

ANSWER

Operations

QUESTION 33

Where are emergency shutoff devices most often located on cargo tanks?

ANSWER

Behind driver's side cab

QUESTION 34

What should be done just before moving to decontamination while performing damming operations?

ANSWER

Decontaminate tools

QUESTION 35

To what angle to the pipe should the tang be when closing the valve on the residential natural gas lone?

ANSWER

90-degrees

QUESTION 36

What should be done first when dealing with a leaking flammable liquid that is on fire?

ANSWER

Control the leak

QUESTION 37

Which is performed with a pressurized stream of water from hoselines?

ANSWER

Vapor dispersion

QUESTION 38

What should be determined after the quantity and surface area of the hazardous material that has leaked during vapor suppression operations?

ANSWER

Type of foam

QUESTION 39

Which is a goal of fire control tactics at a hazmat incident?

ANSWER

Extinguish fires

QUESTION 40

Which does not freeze protect with antifreeze?

ANSWER

HIgh-expansion foam

QUESTION 41

IN which do the molecules of the liquid hazardous material physically adhere to the clean up material?

ANSWER

Adsorption

QUESTION 42

What is blanketing of liquids essentially the same as?

ANSWER

Vapor suppression

QUESTION 43

On which class of fuel cant he bank-down application method be used?

ANSWER

Class B

QUESTION 44

Where should water be directed when cooling the vapor space of the flammable gas tank?

ANSWER

Top of the tank

QUESTION 45

Which is primarily used to suppress vapors in unignited spills of hazardous liquids?

ANSWER

Film forming fluoroprotein foam

QUESTION 46

Which extinguishing agent should be selected at the flammable liquid fire when personnel can blanket the fuel cutting it off from its air supply?

ANSWER

Foam

QUESTION 47

What is the minimum training level that is normally allowed to perform leak control operations?

ANSWER

Operations

QUESTION 48

Which types of hazards is the first responders primarily concerned with mitigating at the hazmat incident?

ANSWER

Liquid and gas releases

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