EOG 300 pg 64-66 Residential Utility Shut-Off and natrual gas, water and propane

Questions and Answers

What is the primary function of disconnects in electrical systems?

To increase energy efficiency in homes

To regulate electric current flow

To allow safe isolation of electrical equipment (correct)

To transform voltage levels for distribution

In which type of settings are disconnects most commonly found?

In some homes and many commercial/industrial occupancies (correct)

Primarily in commercial buildings

Only in residential buildings

Exclusively in historical structures

Which statement accurately reflects the applications of disconnects?

They are not relevant in commercial properties.

Their application is limited to outdoor installations.

They may be used in both private homes and industrial applications. (correct)

They can only be used in residential installations.

Why might disconnects be used in commercial or industrial environments?

To meet safety regulations and standards Signup and view all the answers

What aspect of disconnects contributes to electrical safety?

They isolate electrical circuits for maintenance. Signup and view all the answers

What type of fuse might be found in older homes that allows for easy removal to shut off power?

Screw-base fuses Signup and view all the answers

What are the two types of electrical disconnections mentioned for shutting off power?

Screw-base fuses and pullout disconnects Signup and view all the answers

What is the primary purpose of the devices referenced in older homes?

To shut off power Signup and view all the answers

Which option is not mentioned as a type of disconnect that may be present in older homes?

Smart fuses Signup and view all the answers

In homes with cartridge fuses, how might these be disconnected?

By removing screw-base fuses or pullout disconnects Signup and view all the answers

What should be done with individual breakers when shutting off electricity at a residential property?

Their status should be noted if they are disturbed. Signup and view all the answers

Why is it important for PSO and ONG to respond in cases of utility damage?

They ensure the owner will repair and inspect the system. Signup and view all the answers

In which scenario should the main breaker be shut off instead of individual breakers?

When the status of breakers is crucial for investigation. Signup and view all the answers

What should be done if a breaker is in the tripped position?

Note its position and avoid messing with it. Signup and view all the answers

What is a reliable indicator that a gas valve is in the 'off' position?

The padlock holes line up. Signup and view all the answers

Which statement about water meter valves is correct?

They have a definite stop at the 'on' and 'off' positions. Signup and view all the answers

Where is the valve typically located on propane tanks?

On the top, sometimes under a bonnet. Signup and view all the answers

What must structural companies avoid doing with gas lines?

Capping gas lines. Signup and view all the answers

What should companies identify in the area regarding propane?

Emergency shutoff valves. Signup and view all the answers

Which action is prohibited for TFD members?

Pulling meters Signup and view all the answers

What should TFD members avoid doing with wires?

Cutting them Signup and view all the answers

Which of the following is included in the restriction for TFD members?

Removing single cartridge fuses Signup and view all the answers

Which task is explicitly forbidden for TFD personnel?

Pulling meters or wires Signup and view all the answers

Tanks at propane fill stations take their supply from the bottom of the tank and will have a remote shut off handle similar to?

Bobtail delivery trucks Signup and view all the answers

Study Notes

Residential Utility Shut-Off

TFD can shut off utilities safely in residential areas, usually at one and two-family homes.
When utilities are damaged, the Incident Commander (IC) must call PSO and ONG to pull meters to prevent unsafe usage.
Property owners must repair and inspect utilities before restoring service, especially important in rental properties.

Electric Shut-Off

Control electricity by turning off the main breaker at the electrical panel, avoiding individual breakers to aid in fire investigations.
If individual breakers are turned off, document their status (on or tripped).
Older homes may use screw-base fuses or pullout disconnects to shut off power.
Larger switches, known as disconnects, are found in some homes and many commercial/industrial buildings.

Natural Gas Shut-Off

Shut off natural gas by turning the meter valve 90 degrees to the pipe; the valve can spin infinitely.
Line up padlock holes to confirm the valve is in the "off" position.
TFD members are prohibited from plugging or capping gas lines.
Some gas meters are located in underground canisters similar to water meters.

Water Shut-Off

Water meter valves function similarly to gas meter valves, with distinct "on" and "off" positions.
In the "off" position, padlock holes also align for verification.

Propane Shut-Off

Propane tanks have a valve on top, which may be shielded by a padlocked bonnet or dome.
Some industrial setups use valves located at the end of the tank for easy access.
Propane fill stations draw supply from the bottom of tanks and feature remote shut-off handles.
Awareness of local emergency shutoff valve locations is crucial for safety.

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Description

This quiz covers the protocols for shutting off utilities during emergencies by the TFD. It emphasizes the importance of involving PSO and ONG when there is any damage to the utility systems, ensuring safety and proper repairs for residential properties. Test your knowledge on these critical procedures!