Metro SOG 06 - Sheet1

Question 1

From Metro SOGs:

What are the two methods that can be used to operate the fans and dampers ?

Answer 1

remotely at OCC, at the local fan control panels near each fan

Question 2

From Metro SOGs:

In which mode can OCC override the the thermostatic controls and control fan shafts remotely?

Answer 2

Automatic mode

Question 3

From Metro SOGs:

What color light will be lit at the local fans control panels if the panel is a the automatic mode? What light will be on if they are placed in Emergency Supply/Exhaust?

Answer 3

Green light = Automatic / Red Light = Emergency Supply/Exhaust / OFF = No Light

Question 4

From Metro SOGs:

In which mode will be fans to move air OUT of the tunnel or station? In which mode will move air IN to the tunnel or station?

Answer 4

Emergency Exhaust = OUT / Emergency Supply = IN

Question 5

From Metro SOGs:

When controlling ventilation OCC can only control fans at the supervisory control console if the local control switches are in what mode?

Answer 5

Automatic mode. OCC cannot control the fans if they are removed placed into Emergency Supply/Exhaust or Off.

Question 6

From Metro SOGs:

During an extrication operation what must be monitored? What is an excellent unit for this task?

Answer 6

Air Monitoring and The Haz-Mat Unit

Question 7

From Metro SOGs:

In which mode will be the UPE and fan shafts in the tunnels at both ends of the platform be placed in during a fire at the PLATFORM LEVEL?

Answer 7

Emergency Exhaust to push the smoke out of the fan shafts and pull fresh air in the escalators to protect egress and access.

Question 8

From Metro SOGs:

Which mode will the UPE and fan shafts in the tunnels at both ends of the platform be placed in when there is fire at the MEZZANINE LEVEL?

Answer 8

Supply mode, pushing the smoke and heat up the escalators and out. This protects the passengers on the platform level whom can then be evacuated by train to another station.

Question 9

From Metro SOGs:

During a fire on the Mezzanine Level, if the escalators are blocked as a means of egress but the platform is clear, what is the primary means of evacuation?

Answer 9

A train can transport passengers from the affected station to the next

Question 10

From Metro SOGs:

In the event of a tunnel fire not located under a fan shaft what shall occur? What is this effect called?

Answer 10

The fan shaft on one side of the fire will be placed in supply while the other is placed in exhaust and all dampers to ventilation shafts nearby are closed. This effect is called the “Push Pull” effect.

Question 11

From Metro SOGs:

What two modes are acceptable on a local fan control panel when ENTERING a Metro Fan Shaft? What mode would FD personnel never enter?

Answer 11

Should be placed in Manual Supply or OFF. FD Personnel shall never enter a Fan Shaft in Exhaust mode.

Question 12

From Metro SOGs:

In Normal Operation, fans and dampers operate automatically by a thermostat when _______?

Answer 12

the preselected temperatures are reached

Question 13

From Metro SOGs:

What are the four options on a local control panel in a Metro Fan Shaft?

Answer 13

1. Automatic (OCC can control remotely, otherwise operated by thermostats) 2. Emergency Supply 3. Emergency Exhaust 4. Off (Some panels will not have this option)

Question 14

From Metro SOGs:

What four things will a properly coordinated ventilation effort do?

Answer 14

1. Establish a constant direction of airflow 2. Move the Smoke and Heat away from attacking firefighters and exiting passengers 3. Confine the heat and smoke to a limited area 4. Facilitate fire extinguishment

Question 15

From Metro SOGs:

In addition to the Fans, Dampers, and Thermostats what action also circulates air in a Metro Station? What should the IC take into consideration?

Answer 15

Train Movement = The Piston Action /These air blasts should be taken into consideration by the IC when Metro wants to move trains near an incident.

Question 16

From Metro SOGs:

What must the IC CAREFULLY CONSIDER before changing?

Answer 16

How Ventilation affects the entire situation before making changes

Question 17

From Metro SOGs:

Does any ventilation occur prior to FD arrival? If so, should these decisions be changed?

Answer 17

OCC can be expected to start ventilation procedures prior to FD arrival. Unless there is a very good reason, OCC’s initial ventilation should not be altered. This APPLIES even if OCC has mad the incorrect vent decision.

Question 18

From Metro SOGs:

What shall units note to OCC and IC as they advance on a Metro Fire?

Answer 18

Report the direction and effectiveness of current ventilation, and recommend changes they deem appropriate.

Question 19

From Metro SOGs:

How many passengers my be evacuating off of a Metro train?

Answer 19

Up to 1,600 passengers

Question 20

From Metro SOGs:

What 5 things does OCC consider in regards to ventilation decisions?

Answer 20

1. location of the fire 2. configuration of the fan and vent shafts 3. Type of station or tunnel 4. slope and grade 5. the direction of any evacuation in progress

Question 21

From Metro SOGs:

What does UPE stand for and where are its controls located?

Answer 21

Under Platform Exhaust System/ Control Panels located in Mechanical Equipment rooms at each end of the station platform. Each room controls half of the platform.

Question 22

From Metro SOGs:

What stations can the UPE only operate in Supply Mode?

Answer 22

1. Dupont Circle 2. Farragut North 3. Metro Center 4. Gallery Place Judiciary Square 5. Union Station

Question 23

From Metro SOGs:

What conditions must be present for FD Crews to enter a fan shaft? What is the only exception to these conditions?

Answer 23

1. The fans are not exhausting smoke or heat 2. The fan shaft is located in an emergency exit 3. The fans can be placedin the “manual supply” or “manual off” mode, and 4. They are ordered to enter. OR **There is an obvious rescue to be made and the proper notice of the conditions has been made and approval has been received.

Question 24

From Metro SOGs:

True/False: Units will not enter fan/emergency exit shaft with a fan operating in the exhaust mode.

Answer 24

TRUE