Chapter 10

Question 1

rescuers are reportedly ____% of all confined space victims in the US

Answer 1

60

Question 2

OATH communication system on a lifeline

Answer 2

1 tug = OK
2 tugs = advance
3 tugs = take up
4 tugs = help

Question 3

release of a substance from or through a surface

This occurs when a container leaches a contaminant out of its containment and into the confined space where it is housed

Answer 3

desorption

Question 4

trunk pipelines are usually ____ to _____ inches

Answer 4

8-48

Question 5

introducing a non-flammable gas into a flammable atmosphere in order to remove the oxygen and prevent and explosion

Answer 5

inerting

Question 6

_____ are pipelines that carry water to cities or industrial complexes

Answer 6

Aqueducts

Question 7

______ carry treated sewage away from rivers and streams while ______ carry rain water into them

Answer 7

Sanitary sewer, Storm sewer

Question 8

____ are watertight barriers installed or constructed to provide a relatively dry environment in which to work

Answer 8

Coffer dams

Question 9

___ is the intentional introduction of an inert gas such as argon or nitrogen to a confined space.

Answer 9

Inerting

Question 10

A commonly accepted industry guideline is to implement ventilation that will result in at least _____ air exchanges per hour.

Answer 10

20