TB 126 - Metro Gold Line Extension

Question 1

The metro gold line extension project will span how many miles?

Answer 1

6 miles

Question 2

The metro gold line extension project will be completed in what year?

Answer 2

2009

Question 3

The metro gold line project will have how many miles of tracks below grade in underground tunnels?

Answer 3

1.8 miles

Question 4

How far apart are the 2 tunnel boring machines placed apart?

Answer 4

25 feet

Question 5

The metro gold line east extension tunnel depth will be how many feet below grade?

Answer 5

40 feet

Question 6

How far apart of the 2 1/2” outlets located for the project?

Answer 6

Every 200 feet

Question 7

During tunnel construction, intrinsically safe fans of what CFM provide ventilation and evacuate air from tunnel?

Answer 7

100,000 CFM

Question 8

The intrinsically safe fans evacuate side from tunnel through how large of a vent pipe?

Answer 8

72 inch

Question 9

Who has the ability to reverse the direction of the airflow of the fans if required during emergencies?

Answer 9

The contractor

Question 10

The tunnel boring machine is approximately how many feet long?

Answer 10

300 feet

Question 11

The tunnel boring machine can tunnel up to how many feet a day?

Answer 11

100 feet

Question 12

What are the combustible around the tunnel boring machine limited to?

Answer 12

Hydraulic oil and lines

Question 13

How large of an area does the shield protect around the front of the TBM?

Answer 13

20 feet

Question 14

How many 8-passenger diesel locomotives move the the muck cars?

Answer 14

2

Question 15

How long are the locomotives?

Answer 15

21 feet

Question 16

How wide are the locomotives?

Answer 16

5 feet wide

Question 17

How much does the muck locomotive weigh?

Answer 17

35 tons

Question 18

Where are the 3 locations for the extinguishing system on the locomotives?

Answer 18

In front of driver
Right side of operator cab
Rear engine compartment

Question 19

What is the fuel capacity of the locomotives?

Answer 19

75 gallons

Question 20

How long is a muck car?

Answer 20

15’

Question 21

How wide is a muck car?

Answer 21

5’

Question 22

How tall are the sides of a muck car?

Answer 22

6.5’

Question 23

The muck car empty weighs how much?

Answer 23

9,000 pounds

Question 24

A loaded muck car weighs as much as how many pounds?

Answer 24

35,000 pounds

Question 25

Entry portals for the construction site are how deep?

Answer 25

80 feet

Question 26

What is a tag-in/tag-out system used for employee accountability and is a reference for first responders to determine who is working in the tunnel?

Answer 26

“Brass board”

Question 27

Each tunnel boring machine has approximately how many miners as the crew?

Answer 27

12

Question 28

During shift change how many personnel may be on site?

Answer 28

35-40

Question 29

There is a 13,000 volt AC supply in the tunnel that is transformed down to how many volts?

Answer 29

480 volts

Question 30

By law, all personnel who enter a mining (tunnel) site must wear a how many hour self-rescue device to provide means for escape from hazardous non breathable atmosphere?

Answer 30

1 hour

Question 31

All fire personnel may enter a tunnel with a non-compromised atmosphere of what provided they wear an SCBA and self rescuer respirator?

Answer 31

``` Oxygen 19.5-23% CO levels 25 ppm or less HS2 10 ppm or less N02 5 ppm or less C02 5% or less LEL 10% or less ```

Question 32

The Taylor brothers safety officer, supervisor, MTA inspector or gas indicators on site provide what information?

Answer 32

Tunnel atmosphere

Question 33

Entry into a compromised atmosphere should not exceed a distance of what?

Answer 33

500’

Question 34

Members entering a comprised atmosphere are limited to how many minutes of working time with a 45 and 60 minute bottle?

Answer 34

45 min: 9 min | 60 min: 12 min

Question 35

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

Answer 35

USAR

Question 36

The tunnel utility is assigned to what station that has 18 bio-marine brand biopak 240 re-breathers?

Answer 36

Fire station 25

Question 37

Direct fire attack in the tunnel should only be justified if there is a possibility of saving a what?

Answer 37

Life

Question 38

What should be pumped to the metro gold line construction site?

Answer 38

150 psi

Question 39

How many stations will the metro gold line extension have?

Answer 39

8