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AO Study Material Miscellaneous > TB 162 - Metro Rail Regional Connector Phase > Flashcards

TB 162 - Metro Rail Regional Connector Phase Flashcards

1
Q

The MRCTC project will provide an underground light rail system connecting the what to the 7th/Fig station?

A

Metro gold line

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2
Q

What is the expected completion date for the MRCTC?

A

2020

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3
Q

When did excavation for the tunnel construction begin?

A

September 2014

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4
Q

What are the 3 new underground stations that will be implemented in the project?

A

1st/central
2nd/broadway
2nd place/Hope

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5
Q

What is the budget for the project?

A

1.366 billion dollars

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6
Q

How long is the addition from

The metro rails little Tokyo/arts district to the 7th/fig station?

A

1.9 miles

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7
Q

The connector will provide a 1 seat ride between Azusa and what between east LA and Santa Monica (phase II) without transferring lines?

A

Long Beach

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8
Q

The what site is located between the 1st and alameda branches of the alignment?

A

“Mangrove”

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9
Q

The what will provide the design build contractors use and space for a tunnel boring machine (TBM)?

A

“Mangrove”

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10
Q

The 1st street/central avenue cut and cover station ends beneath the intersection of 1st and alameda, the alignment splits into how many directions?

A

2

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11
Q

The what will be constructed by cut-and-cover excavation methods, with branches extending to east and north?

A

“Wye” (2 legs of a true eye)

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12
Q

The eastern branch extends approximately how many feet within a cut-and-cover excavation to the beginning of an open trench structure?

A

419 feet

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13
Q

The open trench structure extends approximately how many feet father east toward the end of the alignment along 1st street?

A

401 feet

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14
Q

The northern branch adjacent to alameda street extends approximately how many feet within a cut and cover excavation to the beginning of an open trench structure?

A

812 feet

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15
Q

The open trench structure extends approximately how many feet farther north to the beginning of an above grade section?

A

409 feet

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16
Q

The depth of the excavation will range from a few feet approximately how many feet farther north to the beginning of an above grade section?

A

409 feet

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17
Q

The depth of the excavation will range from a few feet to approximately how many feet?

A

45 feet

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18
Q

Along the 1,354 foot long section of the cut and cover tunnels (flower street), the depth of the excavation will range approximately how many feet?

A

50 to 55 feet

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19
Q

For the 1st/central station, the depth of the excavation will be approximately how many feet below existing ground surface?

A

45 to 50 feet

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20
Q

For the 2nd/broadway station, the depth of the excavation will be approximately how many feet below existing ground surface?

A

95 to 100 feet

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21
Q

For the 2nd/Hope station, the depth of the excavation is approximately how many feet below the sidewalk elevation adjacent to hope and general Thaddeus kosciuszko way?

A

105 feet

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22
Q

For the 2nd/Hope street station, the depth of the excavation will be approximately how many feet below the existing ground surface at the west end of the station?

A

85 feet

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23
Q

Where is the 1 minded crossover structure located?

A

Immediately east of the 2nd street/broadway station

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24
Q

The 1 minded cross over structure is how many feet in length?

A

289 feet

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25
Q

The finished internal dimensions of the 1 minded crossover structure would be approximately how many feet wide and high?

A

56 feet wide

30 feet high

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26
Q

Ground cover over the cavern is approximately how many feet?

A

60 feet

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27
Q

Cross over caverns are anticipated that they will be constructed using what to enlarge the previously bored tunnels?

A

Sequential evacuation methods (SEM)

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28
Q

There is a possibility that during tunneling operation, pockets of what gas may be encountered?

A

Methane

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29
Q

Cal OSHA has listed the project as what and has identified hazard mitigation through use of a ventilation system and constant air monitoring?

A

“Potentially gassy”

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30
Q

All what will run the entire length of the tunnel?

A

Utilities

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31
Q

How large of a pipe provides a water system for cooling the TBM and water for firefighting operations?

A

46”

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32
Q

The project is equipped with 2 1/2” NST outlets every how many feet?

A

200 feet

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33
Q

Intrinsically safe fans with how many CFMs provide ventilation and evacuation air from the tunnel through a 66” pipe?

A

100,000 cfms

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34
Q

The limits of the stations, crossover cavern, 2 end sections and the cut and cover tunnel section result in 3 reached of what bored tunnels?

A

Twin bored tunnels

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35
Q

The TBM provide an excavation diameter of how many feet?

A

22 feet

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36
Q

What reach extends from 1st/central to a crossover cavern a distance of 2,273 feet?

A

Reach 1

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37
Q

For reach 1, the depth of cover will range from approximately how many feet tunnel crown and existing ground surface?

A

2 to 65 feet

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38
Q

What reach extends east/southeast from 2nd/Hope a distance of 1,630 feet?

A

Reach 2

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39
Q

Reach 2 has a depth of cover ranges from approximately how many feet along this reach?

A

70 to 130 feet

40
Q

From 2nd/Hope station, a distance from tunnel crown to storm drain invert approximately how many feet?

A

25 to 45 feet

41
Q

What reach extends a distance of 1,035 feet with one cross passage at the 1st/central station?

A

Reach 3

42
Q

Reach 3 will be beneath south flower street with a depth cover ranging from approximately how many feet?

A

30 to 60 feet

43
Q

What 3 portals of entry during construction of the MRCTC project will the fire department respond to?

A

1st/central
2nd/broadway
2nd/Hope

44
Q

Entry portals are how many feet deep and equipped with extinguishing systems, fire detection devices, and emergency lighting?

A

45 to 90 feet

45
Q

Adjacent to the entry portal, a tag/in/tag out system used for employee accountability is known as what?

A

“Brass board”

46
Q

Each TBM has approximately how many miners with additional personnel above ground?

A

10 miners

47
Q

During shift change how many personnel may be on site?

A

50 to 75

48
Q

Hours of operation will vary dependent on what?

A

Noise and traffic restrictions

49
Q

There is a 13,200 volt AC supply in the tunnel that is transformed down to how many volts?

A

480 volts

50
Q

The main panel for the project is located at what site?

A

Mangrove site

51
Q

In order to turn off system, who must you confer with?

A

Site engineer

52
Q

Hard-wired mining phones during the tunnel operation are every how many feet as well as on the TBM and at cross passages and the portals?

A

800 to 1,000 feet

53
Q

How many large scale fire type incidents occurred during the construction phase of the metro red line?

A

2

54
Q

If the atmosphere in the tunnel is compromised, entry will be limited to who?

A

USAR certified members wearing re-breathers

55
Q

Injured victims are to be brought outside of tunnel and will be lifted on a stokes litter basket by who at grade level?

A

Construction workers (crane operators)

56
Q

Cal OSHA requires that tunneling contractors provide rescue team personnel of more than how many workers will be operating in a tunnel or shaft?

A

10 workers

57
Q

The fire department ha agreed to be the rescue team per Cal OSHA because we meet the requirement of having a rescue team onsite within how many minutes?

A

30 minutes

58
Q

MFC will dispatch who for reported incidents in the tunnel or shaft during construction phase?

A 
3 engines
2 LF
2 BCs
1 ALS RA
1 squad
1 heavy rescue
1 tunnel utility
1 tunnel utility certified engine
1 USAR group
59
Q

Tunnel rescue requirements are restrictive and carefully monitored by who?

A

Cal OSHA

60
Q

For all fire and EMS incidents that occur below grade will require what PPE?

A

Full PPE

61
Q

Fire department members may enter the tunnel to affect a rescue as long as they comply with CCR title 8, section what sub chapter 20-tunnel safety orders?

A

8430

62
Q

First responders in order to facilitate a rescue may utilize on site what to determine atmospheric levels?

A

Monitoring experts

63
Q

By law all personnel who enter a mining site must wear a how long of a self rescue device to provide a means for escape from a hazardous non-breathable atmosphere?

A

1 hour

64
Q

For fire personnel the breathing apparatus policy is predicated on what 2 possible atmospheric conditions?

A

Non compromised and compromised

65
Q

First responders may obtain tunnel atmospheric information from who?

A

A regional connector constructors underground safety officer, supervisor, MTA inspector or from the gas indicators in the onsite construction trailer

66
Q

If the fire department issued 3-gas monitor registers an alarm, the area should be considered a compromised atmosphere as the monitor is pre set for allowable levels of what?

A

Oxygen, CO, and LEL

67
Q

What are maintained and stored at each portal entry by the contractor for the specific use of fire personnel?

A

Self rescuer respirators

68
Q

The self rescuer respirators for the fire department keep rescuers compliant with the law by having a separate how many hour method of escape breathing capacity?

A

1 hour

69
Q

Types of incidents with a non-compromised atmosphere where members must wear an SCBA and a self rescue device are what?

A

EMS
Physical extrication equipment
Confined space rescue
Collapse or flooding

70
Q

An SCBA and self rescuer respirators is required and personnel are limited to initial observation of atmospheric testing for what conditions in a compromised atmosphere?

A

2 member team in sight of opening
4 member team if they will be out of sight of opening
A back up team is standing by
If the entry does not exceed 500 feet

71
Q

Members entering a compromised atmosphere are limited to how many minutes of work with a 45 and 60 minute bottle?

A

45 min bottle: 9 minutes

60 min bottle: 12 minutes

72
Q

Entry into a tunnel with a known compromised atmosphere beyond initial observation or atmospheric testing is limited to what certified members only?

A

USAR

73
Q

Certified USAR members must utilize what periodically in a tunnel that has a compromised atmosphere?

A

Drager re-breathers and take gas readings periodically

74
Q

If a fire or explosion occurs in the tunnel, re breathers are not acceptable because who does not certify them as a firefighting breathing apparatus?

A

NIOSH

75
Q

USAR entry teams may use either what for entering a compromised atmosphere for respiratory protection?

A

Positive pressure breathing apparatus or supplied air (air cart)

76
Q

Where is the tunnel utility assigned to which is an RA with 18 drager re-breathers?

A

Fire station 88

77
Q

The IC shall evaluate a what in initiating a direct fire attack?

A

Risk versus gain

78
Q

A 6 inch temporary pipe supplied by a hydrant with 2 1/2” outlets every how many feet with FDCs located next to hydrant at ground level make up the water system during construction?

A

200 feet

79
Q

Engineers shall pump a maximum of what PSI into the FDCs?

A

150 psi

80
Q

The second arriving company will establish staging where?

A

Above ground in close proximity to the portal opening

81
Q

The third arriving company will operate in the portal adjacent to the tunnel and is responsible for what?

A

Technical support

82
Q

Technical support is augmented with USAR certified staffing from the first arriving what?

A

USAR taskforce

83
Q

First arriving USAR taskforce officer established what in the portal adjacent to tunnel?

A

Tunnel division

84
Q

The remainder of the first arriving USAR task force will prepare for what?

A

Tunnel entry operations

85
Q

Operations when implemented, normally operates at what level in proximity to command post?

A

Surface level

86
Q

Who reports to operations?

A

Tunnel division/branch, perimeter control, hazmat group, fire suppression group, medical group/branch, and staging

87
Q

Tunnel division will ensure that all emergency operations are discontinued and the tunnel evacuated should the tunnel atmosphere meet or exceed what percentage LEL?

A

20%

88
Q

What is logistics responsible for?

A

Flow of equipment to support incident, control utilities, units under their supervision are functioning properly

89
Q

Base may be established by available what from the first alarm assignment?

A

Engineers

90
Q

Where will the equipment pool be located?

A

Adjacent to the vertical shaft

91
Q

Where will lobby/systems control be located?

A

In contractors trailers

92
Q

What 3 intrinsically safe methods of electronic communications are there within the tunnel?

A

Contractor hardwire communication system
USAR confined space communications system
LAFD 800 MHZ radio

93
Q

Every how many feet within the tunnel at each portal, station box and at cross passages are there contractor hardwire telephones?

A

1000 feet

94
Q

USAR confined space communications system have how many feet of wire fire communication?

A

Over 1000 feet

95
Q

LAFD 800 MHz radios will only be useful in what mode of line of sight?

A

Direct mode

96
Q

An entry tram are comprised of how many members?

A

Usually 6 but not less than 4

97
Q

Do entry teams all need to be from the same company?

A

Not necessarily, based on physical capabilities and experience

AO Study Material Miscellaneous (72 decks)

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