TB 62 - 2 Inch High-Rise Hose System Flashcards

1
Q

HR hose is MORE susceptible to DAMAGE than double jacketed hose as it has a tendency to?

A

-incur very small punctures when used around broken glass and sharp objects.

(however, these punctures WILL NOT tear or increase in size EVEN UNDER extreme pressure.)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

A benefit of the HR hose, especially when working in the confined spaces of stairwells and interior hallways, is its ability to resist kinks.

Under pressure, the hose can be bent to within _______ inches before it will kink.

A

12 inches

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

A company’s HR hose compliment will provide the option of laying a single line of uniform size 200 feet in length delivering _____ gpm or two lines 100-feet in length delivering a total of _____ gpm.

A

-1 line 200 gpm

  • 2 lines 400 gpm
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Assembling the Hose Packs

  1. The single layer method produces a pack _____-inches taller than the double layer method.
  2. Considerations for using either the single or double layer hose pack can be based on?
A
  1. 8 inches
  2. Compartment space and Company preference.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

When assembled, the packs weigh ____ pounds

The approximate dimensions will be:
•40” tall by 22” wide for the single layer pack
•32” tall by 16” wide for the double layer pack.

A

38lbs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the primary reason for carrying the eight-foot 2- 1/2” hose in the pigtail?

A

Hose cabinets located in the STAIRWELLS above the fourth floor in buildings built between 1960 and 1974. These had the Combination (Class III) Standpipe System

(The pigtail allows you to connect to the outlet in a recessed cabinet and then operate two lines off the gated wye in order to maximize the available water from the outlet.)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

If you need to extend off a drop bagged line with a 2” hose pack, your friction loss will be:

50 psi per each 100 ft of 1-3/4”
____ psi per each 100 ft of 1-1/2” line

A

-130 psi (very high)

(Keep in mind that your 2” hose pack has the same 200 gpm nozzle that the 1-3/4” line does.)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Very often, the best way to get a line on a fire in a Pre-60 high rise with Class 1 Dry Standpipes is to?

A

drop bag a 1-3/4” or 1-1/2” hand line directly from your apparatus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Utilizing the pigtail assembly on different standpipe systems:

A

Pre-60 Dry standpipes:
-OUTSIDE: use pigtail hose to bring gated wye to fire escape balcony.
-INSIDE: connect elbow (pointed down) and gated wye directly to outlet inside stairwell.

Combination Standpipe System:
-CABINET (above 4th floor): connect pigtail hose to outlet and gated wye to pigtail.

Combined Standpipe Sprinkler System
-Connect elbow (pointed down) and gated wye directly to outlet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

1960 - 1974 Combination Standpipe Systems

The orifice plate can be found at one of the following locations:

A

• Soldered to the outlet itself (use slotted screwdriver or channel locks to remove)

• Behind the gasket on the drip-cock (replace gasket after removing orifice plate)

• Soldered to the male end of the drip-cock (use slotted screwdriver or channel locks to remove)

• Behind the gasket on the 2-1/2” hose (replace gasket after removing orifice plate)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Orifice Plates

Removal of the orifice plate is recommended in order to get the maximum FLOW from the outlet.

Failure to do so will restrict the flow from the outlet to _____ gpm at a minimum of _____ psi residual pressure.

A

-200 gpm at 50 psi

(Different PSI than stated in Bk100 = 45PSI)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

1960 - 1974 Combination Standpipe Systems

If the orifice plate has NOT been removed, OPEN THE VALVE FULLY.

If the orifice plate has been REMOVED, the outlet should be opened ______ turns, then adjusted from there. Removing the orifice plate will allow the gate valve to be used as an adjustable orifice plate.

A

-one and one-half turns

(Have a member assigned to stay at the gate valve throughout the firefighting operation to insure no one accidentally adjusts your outlet.)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

If conditions in the stairwell will not allow you to connect to the standpipe on the fire floor, you can connect on the floor _______ (above or below?).

A

floor below

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Post-74 Combined Standpipe Sprinkler System

The hose lays will be the same as with a Combination Standpipe Sprinkler System with the difference being the ______.

A

outlet valve. (Utilizes Pressure Reducing Valves)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Post-74 Combined Standpipe Sprinkler System

After making connections, how much should the Pressure Reducing Valve (PRV) be opened?

A

-Opened fully

(Failure to open the PRV fully will result in severely reduced flow.)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Post-74 Combined Standpipe Sprinkler System

This system utilizes a Pressure Reducing Valve (PRV) when the pressure at the outlet exceeds 150 psi. Therefore, it is possible in new construction to encounter orifice plates on the upper floors where the system pressure falls below 150 psi.

This will typically be the top ____ to ____ floors.

A

six to eight floors

17
Q

Shutting down the nozzle will not create a problem when opening it back up under the static pressure built up due to:

A

the new design of the nozzles.