Shared Flashcard Set

Details

Utilities
OFD Utility Emergencies
25
Other
Not Applicable
04/13/2009

Additional Other Flashcards

 


 

Cards

Term
You must treat all wires as if they are ______
Definition
live
Term
What is the force that moves the electrons and current along the conductor?
Definition
voltage
Term
T/F It is low voltage that most responders encounter in normal household emergencies
Definition
TRUE
Term
What are the pathways for the current?
Definition
conductors
Term
T/F Any wire, device, or object that allows electrical current to flow along a pathway is considered a conductor
Definition
TRUE - even humans can be a conductor
Term
Electrical current flows from ________ voltage to __________ voltage
Definition
higher, lower
Term
What is the method of taking the unwanted electrical current and returning it to the earth via a designed circuit?
Definition
grounding
Term
What is the minimum distance for repsonders during electrical conductor emergencies?
Definition
10 feet
Term
What is the minimum safe distance for responders in electrical transmission emergencies?
Definition
35 feet from wires and 100 feet in heavy smoke
Term
T/F Electricity does not follow the path of least resistance, it follows ALL paths
Definition
TRUE
Term
The degree of shock and resulting injuries depends on what?
Definition
the amount of current and
lenth of time the current passes through the body
Term
Why is the human body such a great conductor of electrical current?
Definition
The human body is made up of 90% salt water
Term
What color of pipe or wire around a pipe would indicate that it is a gas pipe?
Definition
YELLOW
Term
What gas smells like rotten eggs?
Definition
natural gas
Term
____________ gas is a colorless, tasteless, and odorless flammable gas
Definition
natural gas
Term
What are some chemical characteristics of natural gas?
Definition
colorless, tasteless, odorless, effective fuel, clean and efficient
Term
Natural gas is for the most part stable - however it is a fuel - what can make natural gas explosive?
Definition
strong oxidizers, such as oxygen-enriched atmospheres, fluorine, and chlorine, can make natural gas very explosive
Term
What happens when natural gas and chlorine come in contact?
Definition
explode in sunlight
Term
What happens when natural gas and fluorine come in contact?
Definition
explode on contact
Term
A relief valve vent for releasing excess pressure in natural gas systems may be disguised as a ?
Definition
street sign post
Term
What is used to reduce gas from high pressure to low pressure for residences?
Definition
regulators
Term
Low pressure meters operate at ___________ psig and are found on single-family units and smaller commercial properties
Definition
1/4 psig to 2 psig
Term
When the petcock is in-line with the pipe the valve is off or on?
Definition
ON
Term
T/F Each appliance should have a shut-off
Definition
TRUE
Term
Where should the gas be controlled ff an appliance cannot be shut off at the connection?
Definition
the gas must be controlled at the meter or curb if the appliance does not have a gas shut-off
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