Metrorail Emergency Service Flashcards
May the emergency stop switch on the kiosk escalator monitoring panel be used to stop escalators?
No, because this emergency stop switch has been disconnected;
the emergency stops are located only on the escalators.
Each yard and service facility is composed of several buildings and areas. Which buildings typically contains a “stinger” 750-volt system that allows power to be supplied to the rail cars to move them in and out of the building?
The service and inspection shop.
What statements about the wayside telephone system is CORRECT?
Conference calls can be made from a wayside telephone by notifying the Operations Control Center (OCC).
When a fire alarm is received from a zone in a station, the automatic public address announcement system (APAAS) activates to provide the station manager with a pre-alert of a fire alarm that needs attention. The station manager will have_____ to react to the alarm.
2 minutes
Five types of sensors are used in the Metrorail fire alarm system. Which type is used in sensitive or critical areas, such as train control rooms and communication rooms?
Ionization detectors.
An alarm is transmitted by flammable vapor and gas detection (FV&G) sensors if ambient vapor levels are exceeded. The system is calibrated so that a warning is transmitted if _____ percent of the lower flammable limit for the product is reached, and an alarm is transmitted if _____ percent of the limit is reached.
20; 40
What statements about the warning strobe and alarm device (WSAD) is CORRECT?
Should one of the WSAD paddles fall off of the third rail or running rail, the warning horn will activate.
When passengers are trapped in an elevator, several procedures should be rechecked or attempted to see if the problem can be corrected without the assistance of the elevator mechanic. What should DCFEMS attempt FIRST in this situation?
Shutting down and restoring the main electrical power in the elevator machine room.
According to the Metrorail Emergency Services Manual, for elevators , to originate a call from the kiosk, personnel should depress the _____.
appropriate elevator car or landing button and then depress the “press-to- talk” button
According to the Metrorail Emergency Services Manual, what is the recommended procedure for removing entrapped passengers from an escalator?
Prying the steps away from the sideboards.
What shall apply when evacuating passengers from a tunnel?
Prior to evacuating passengers into the tunnel, all third rail power must be shut down between the emergency scene and the planned exit locations.
There are three separate types of electrical loads found in the Metrorail system: non-essential, essential and emergency. What is/are considered an emergency load?
Communications equipment.
Tunnel ventilation is achieved by four different modes of operation. In the high temperature mode (above 95 degrees Fahrenheit), _____.
dampers are open and fans are operating in the exhaust setting
The Metrorail Emergency Services Manual includes what tactical considerations for using tunnel fans during evacuations?
If fans are not in operation, shafts may experience the chimney effect.
The types of flammable gases and vapors encountered near the Metrorail right-of- way are gasoline, liquefied petroleum gas (LPG) and natural gas. What gases and vapors are the MOST likely substances to be found?
Gasoline and LPG.
According to the Metrorail Emergency Services Manual, what is/are the PRIMARY means of emergency evacuation from a station?
Escalators
When a station fire alarm is activated, the electrical power to the escalators providing entry into the station will be shut down automatically. There is up to a _____ delay from the time of fire alarm activation to the time of escalator stoppage.
2-minute
Chain markers are part of a system of measurement along the right-of-way. The second piece of information in a typical marker, a number, indicates the _____.
track number
What statements about tunnel emergency exit shafts is CORRECT?
In the tunnels proper, emergency exit shafts may be located in vent shafts, fan shafts or single-use “emergency exit shafts” between stations.
When AC electric power is out, emergency battery power will supply lighting and communications in stations for up to _____ hour(s).
three
In the emergency trip switch (ETS) box is a red mushroom button. This button is used to _____.
trip breakers in the traction power substation to shut down electrical power and should only be pushed when there is an imminent threat to life safety
Tunnel ventilation is achieved by four different modes of operation. In the normal temperature mode (59 to 95 degrees Fahrenheit), _____.
dampers are open but fans are not operating
If DCFEMS personnel are going to operate tunnel fans in manual mode, they____.
Must explain the reason for doing so to the OCC and return the fans to the automatic mode after the operation.
There are two types of magnetic sensors that are used as intrusion alarms. One type has a key override capability and is used on ______.
Doors
In which station component are monitors for the passenger emergency reporting system (PERS) typically located?
The kiosk
What is considered the PRIMARY mean of emergency evacuation at a station?
Escalators
In the event that passengers are trapped in an electronic-hydraulic elevator, the station manager will attempt to free the passengers prior to the arrival for fire/ rescue units. After conferring with the station manager to see what efforts have been attempted, fire / rescue personnel should take which action first?
Ensure that an elevator mechanic has been dispatched to the scene.
Remove power from elevator using the main power switch in the machine room
A pressure switch is coated on each escalator at teh sidewall panel where the steps flatten out, prior to passing the comb plate at the top or bottom of the escalator, it stops the escalator should it detect something causing between the side wall panel and the step. It requires ___ pounds of pressure to activate.
150
The metro rail emergency service Manual includes considerations for emergency evacuation of people from a train into the tunnel?
Hand lights will be in emergency exit shafts to highlight potential problem area and trip hazards to the evacuees.
The ____is usually the largest building in a yard and service facility, containing rail car maintenance and repair facilities. This building contains a “stinger” 750-volt system that allows power to be supplied to the rail cars to move them in and out of the building.
Service and inspection shop
In the emergency trip switch (ETS) box is a red mushroom button. This button is used to ____.
Trip breakers in the traction power substation to shut down electrical power and should only be pushed when there is an imminent threat to life safety.
The emergency tunnel evacuation car (ETEC) is used to remove non ambulatory passengers. From the site of an incident. How many passengers can it handle?
4
