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RGC A/O > TB 62- 2" High Rise Hose System > Flashcards

TB 62- 2" High Rise Hose System Flashcards

1
Q

What are the specifications of the hose itself?

A
  • Single jacket construction utilizing nitrile rubber impregnated synthetic yarn as the cord material
  • 50 foot lengths with 1 1/2” couplings
  • Ribbed to reduce wear & increase grip
  • Shoulder of couplings are tapered to reduce snagging
  • Blue in color
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2
Q

The high rise hose is susceptible to damage than double jacketed hose as it has a tendency to incur very small punctures, however these punctures will not what?

A

Tear or increase in size even under extreme pressure

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3
Q

Use of this hose for purpose other than hose packs should be avoided, a benefit of this hose, especially when working in the confined spaces of stairwells and interior hallways is what?

A

Its ability to resist kinks

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4
Q

Under pressure, how far can the hose be bent before it will kink?

A

Within 12 inches before it will kink

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5
Q

When supplying the standard 75 psi nozzle pressure to the 1 1/2” 200 gpm tip, your flow will be what?

A

200 gpm with a friction loss of 35 psi per 100 feet of 2” hose

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6
Q

What is the primary objective of a company assigned to attack the fire?

A

Get one line into operation

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7
Q

What does each hose pack consist of?

A
  • Two 50’ sections of lightweight blue hose
  • One 1 1/2” complete 200 gpm spray nozzle
  • One 2 1/2” x 1 1/2” reducer
  • Five 2’ ladder straps
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8
Q

What does the pigtail assembly consist of?

A
  • One 8’ section of lightweight 2 1/2” hose
  • One 2 1/2” to 1 1/2” gated wye
  • One lightweight folding spanner
  • Two ladder straps
  • One 2 1/2” 60 degree elbow
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9
Q

You can begin making the pack with the hose which kind of what?

A

Either hose rolled, or stretched out straight

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10
Q

How are the hose packs fashioned?

A

Using a 30-45 minute air bottle to form a “U” shaped single layer or double layer pack

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11
Q

The single layer method produces a pack _ inches taller than the double layer method

A

8

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12
Q

When assembling the hose pack, the female coupling of the first section of hose should be how many inches below the gauge of the bottle?

A

10 inches below the gauge of the bottle with the reducer to the female coupling

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13
Q

When you reach the male coupling of the second section, attach the nozzle and position it wear?

A

Base of the pack on the same side as the female coupling you began the pack with

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14
Q

To secure the hose pack, place a strap about how many inches above the bottom of the pack on each side?

A

8 inches

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15
Q

Placing the straps eight inches or so above the folds will help prevent what?

A

Permanent kinks in the hose

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16
Q

When completed, how much will the pack weight?

A

38 pounds

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17
Q

What are the approximate dimensions of the pack?

A
  • 40” tall by 22” wide for the single layer pack

- 32” tall by 16 “ wide for the double layer pack

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18
Q

How much does the pigtail assemble weight?

A

10 pounds

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19
Q

How is the pigtail made?

A

By rolling the gated wye inside the hose and elbow

20
Q

Buildings built prior to 1960 were limited to how high an were required to have what kind of system for our use?

A 
Limited to 150 ft
Dry Standpipe (Class I) System
21
Q

Buildings built between 1960 - 1974 were required to have what kind of system?

A

Combination (Class III) Standpipe System

22
Q

What does Combination (Class III) Standpipe system mean?

A
  • 1 1/2” interior wet standpipes for occupants is supplied by the same riser as the 2 1/2” outlet for our use
  • Pressure supplied by on-site fire pump
  • May also have 2 1/2” hose with 1” straight tip (located in hose cabinets in stairwells above 4th floor)
23
Q

What kind of standpipe system is required in buildings built since 1974?

A

Combined Standpipe Sprinkler System

24
Q

What are some specs on the combined standpipe sprinkler system?

A

-Use the same riser to supply FD outlets and the sprinkler system

25
Q

In a Dry Standpipe (Class I) System, the outlet is located where?

A

Adjacent to the fire escape, usually directly above the inlets at the street level

*building upgraded, outlets have been moved inside to a new enclosed stairwell

26
Q

If you need to extend off a 1 3/4” hose line that you have drop bag, what is the friction loss?

A

50 psi per each 100 feet of 1 3/4”

27
Q

What is the friction loss if you supply your hose pack from a 1 1/2” line?

A

approximately 130 psi, prohibitively high

28
Q

In a Dry Standpipe Class I System, if the outlet is adjacent to the fire escape, how can you use the pigtail hose?

A

The eight foot section can be used to bring the gated wye around so the 1 1/2” outlets are pointed in or at the window, then use one of the straps to secure it to the balcony

29
Q

In a Dry Standpipe Class I System, if the standpipe is in a stairwell, attach the elbow and gated wye directly where?

A

Directly to the outlet, using the elbow will get the hose coming off the outlet/gated wye down onto the landing instead of sticking out blocking the landing

30
Q

In a Combination Standpipe Class III System, what is a drip-cock used for?

A

Attached to the outlet to prevent any water that might leak from the valve from getting into the hose while it is stored on the rack

31
Q

In a Combination Standpipe Class III System, has orifice plates specifically engineered to reduce what?

A
  • The flow of water supplied from a particular outlet

- Size of the orifice plate is determined by the static pressure on the supply side of an outlet

32
Q

The higher the pressure in the system, the what in reference to a orifice plate?

A
  • The smaller the inside diameter of the orifice plate will be
  • Higher pressures will be found on the lower floors of a building
  • Orifice plate not regulate pressure, it restricts flow
33
Q

In a Combination Standpipe Class III System, where can the orifice plate be found at?

A
  • Soldered to the outlet itself
  • Behind the gasket on the drip-cock
  • Soldered to the male end of the drip-cock
  • Behind the gasket on the 2 1/2” hose
34
Q

What are ways to removed the orifice plate?

A
  • Removing the gasket, removing the orifice plate, and replacing the gasket; or
  • using a slotted screwdriver or your channel locks as a pry bar to break the plate off of the opening
35
Q

In a Combination Standpipe Class III System, when deploying the hose pack, if the orifice plate has been removed, the outlet should be opened how?

A

One and One-half turns, then adjusted from there

36
Q

In a Combination Standpipe Class III System, if the orifice plate has not been removed, how should you open the outlet?

A

Open the valve fully

37
Q

Once the hose pack is loaded, one ff should stay at the gate valve, why?

A

To insure no one accidentally adjusts your outlet

38
Q

If conditions n the stairwell will not allow you to connect to the standpipe on the fire floor, where can you connect?

A

On the floor below and easily pull this hose up the stairwell

Ideally, flake the hose up the stairs from the fire floor

39
Q

In Combined Standpipe Sprinkler System built since 1974, are required to be what?

A

Fully sprinklered and also have a standpipe for our use

40
Q

In Combined Standpipe Sprinkler System, utilizes what kind of valve?

A

Pressure Reducing Valve (PRV)

41
Q

When does the system utilizes a PRV?

A

When pressure at the outlet exceeds 150 psi

42
Q

Is it possible in new construction to encounter orifice plates on the upper floors where the system pressure falls below 150 psi?

A

Yes, typically be the top 6 to 8 floors

43
Q

In Combined Standpipe Sprinkler System, when connecting to the system, connect what?

A

Elbow and gated wye directly to the outlet, open fully!

44
Q

In regards to extending the hose line what are the two methods?

A
  • Laying out pack in stairwell, take nozzle and female coupling of dry line down the hall to the nozzle, shut down nozzle, remove tip and attach coupling, strapping the shut off butt open
  • Leave hose pack on back of FF, remove the reducer and two of the hose straps, extend line, shut off nozzle on wet line and attach dry line , strapping off shut off butt
45
Q

For maintenance of the hose pack, what should you do after each use?

A
  • Scrub the outer jacket to free it of dirt and fire debris
  • Drain excess water
  • Then form pack
46
Q

What is the test pressure of the hose?

A

300 psi

RGC A/O (45 decks)

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