Trench / Cave-IN - First Responder

Question 1

Under no circumstances will the officer of the first arriving apparatus or the IC allow anyone in an un-shored trench or excavation site which is greater than ___ feet in depth.

Answer 1

4 feet

Question 2

The majority of trench collapse and cave-in incidents are:

Answer 2

body recovery operations

Question 3

One cubic foot of dirt weighs?

Answer 3

approximately 100 lbs.

Question 4

One cubic yard of dirt weights?

Answer 4

2700-3500 lbs depending on soil type

Question 5

One cubic yard of dirt is about the size of

Answer 5

a mid size car trunk

Question 6

Victims buried to their waist have ___ chance for survival.

Answer 6

greatest chance for survival unless recue personnel cause a secondary collapse due to over aggressive tactics.

Question 7

In undisturbed soil, there is at least a ___% chance that a trench will undergo a second collapse.

Answer 7

50%

Question 8

If working with soil that has been disturbed, there is a __ % chance of a secondary collapse.

Answer 8

75%

Question 9

What is the Initial Response for a trench rescue?

Answer 9

Engine
Rescue Ladder
Task Force 8 (rescue 8 and Engine 8)
Hazmat 5
District Officer

Question 10

Upgraded Rescue Equipment Response:

When the Rescue Officer determines that more equipment is needed to handle the Incident ____ will be requested through the IC

Answer 10

Heavy 8

Question 11

Upgraded Rescue Personnel Response:

If the Rescue Officer determines that more rescue personnel are needed on scene, they will be requested through the IC. Rescue Personnel that are ____ will be sent to the scene.

Answer 11

Rescue Technicians will be sent.

Question 12

Confined Space additional resources
Engine, rescue ladder
US&R trained people
Structural Collapse
Residential/ Commercial Response
US&R trained people
Trench
Engine, rescue ladder
Rescue Technicians

Answer 12

Confined Space additional resources
Engine, rescue ladder
US&R trained people

Structural Collapse
** Residential/ Commercial Response
US&R trained people

Trench
Engine, rescue ladder
**** Rescue Technicians

Question 13

In a trench rescue all apparatus should be positioned at least ___ feet from the incident scene.

Answer 13

150 feet

Question 14

Off-site staging area should be at least ___ feet from the incident site away from the first arriving apparatus.

Answer 14

100 feet.

All apparatus should turn their engines off once they are in position on the scene.

Question 15

Conduct an outer circle scene survey at least ___feet around the scene. Shut off all vibration sources

Answer 15

100 feet.

Question 16

Conduct an inner circle survey at least __ feet around the trench. (this area should be secured with banner guard or fencing, with only one way in and out)

Answer 16

50 feet for the inner circle

Question 17

Ensure all utilities are controlled. Utility companies should be called for as soon as possible (call ____________)

Answer 17

call “811 Okie”

Question 18

Always approach a trench from

Answer 18

The Ends

Question 19

What part of a trench are most prone to secondary collapse?

Answer 19

The sidewalls

Question 20

If you must stand on the sidewall of the trench utilize lumber _______ for walk-boards.

Answer 20

2” x 10” or larger or 3/4” plywood

Question 21

Assist victims who are not trapped out of the trench from ____ only. DO NOT ENTER a trench which is greater than 4 feet in depth that is not shored.

Answer 21

ENDS

Question 22

If flammable liquids are leaking from a highway Cargo Tank, a ___ foot zone should be established.

Answer 22

150 foot