Engine Company Misc.

Question 1

Engine Operations
Equipment: Hose- 1 3/4” rubber lined

2.2.1- Use
2.2.3- Operational Specs (4)

Answer 1

2.2.1- Primary attack hose for firefighting

2.2.3- 1) 50ft sections
2) Coupling is 1 1/2”
3) Max 250 psi
4) Friction loss is 20 psi per length

Question 2

Engine Operations
Equipment: Hose- 2 1/2” rubber lined

2.3.1- Use
2.3.4- Operational Specifications (4)

Answer 2

2.3.1- Most versatile hose in FDNY. Attack of supply line

2.3.4- 1) 50ft sections
2) 2 1/2” couplings
3) 250 psi Max
4) 5psi friction loss per length

Question 3

Engine Operations
Equipment: Hose- 2” polyurethane-lined lightweight hose

2.4.1- Color
2.4.3- Use
2.4.4- Operational Specs (6)

Answer 3

2.4.1- Green with red stripes

2.4.3- Lead attack length on a residential standpipe

2.4.4- 1) 50ft lengths
2) 2 1/2” coupling
3) 250psi max
4) 10psi friction loss
5) Midpoint is painted red. “A-fold”, smooth deployment
6) Reflective arrows on female coupling pointing towards water source

Question 4

Engine Operations
Equipment: Hose- 2 1/2” polyurethane-lined lightweight hose

2.5.1- Color
2.5.3- Use
2.5.4- Operational Specs (6)

Answer 4

2.5.1- White with red stripes

2.5.3- Attack line on standpipe systems

2.5.4- 1) 50ft lengths
2) 2 1/2” coupling
3) 250psi max
4) 5psi friction loss
5) Midpoint is painted red. “A-fold”, smooth deployment
6) Reflective arrows on female coupling pointing towards water source

Question 5

Engine Operations
Equipment: Hose- 3 1/2” rubber lined

2.6.3- Use
2.6.4- Operational Specs (4)

Answer 5

2.6.3- Only used as a supply line

2.6.3- 1) 50ft lengths
2) 3” coupling
3) 300 psi max
4) Friction loss is 3psi depending on length of stretch and amount of flowing water

Question 6

Engine Company Operations
Equipment: Nozzles

Main stream tip (MST) (3) vs. Outer stream tip (OST) (4)

Answer 6

MST- 1)Attach directly to shut off
2) Threaded outlet orifice
3) Used for fire attack

OST- 1) Smaller
2) Can attach to threaded outlet orifice of MST
3) Only FDNY OST is 1/2” tip
4) Only attached to MST for overhaul if necessary

Question 7

Engine Company Operations
Equipment: Nozzles

Define: Nozzle Pressure

Answer 7

The PSI at the tip of the nozzle

Question 8

Engine Company Operations
Equipment: Nozzles

Define: Nozzle reaction

Answer 8

Force of water flowing through the nozzle. Based on the size of the tip and supplied nozzle pressure. “How strong the nozzle feels.” Measured in pounds.

Question 9

Engine Company Operations
Equipment: Nozzles

Define: Flow rate

Answer 9

Amount of water discharged by nozzle in gallons per minute.

Question 10

Engine Company Operations
Equipment: Nozzles- Solid stream

3.6.1- Info (4)

Answer 10

1) Also called smooth bore
2) High volume at low pressure
3) Long reach, superior penetration
4) Manageable nozzle reaction

Question 11

Engine Company Operations
Equipment: Nozzles- Solid stream 1 3/4”

3.6.2- 1) Size 2) Intake and outlet size 3) Required nozzle pressure 4) Flowrate at required nozzle pressure 5) Nozzle reaction at required nozzle pressure
6) Overhaul

Answer 11

1) 1 3/4” nozzle with 1 3/4” hose
2) 1 1/2” coupling, 15/16 MST for attack
3) Requires 50psi at the tip
4) 180gpm at 50psi
5) 68lbs at 50psi
6) 1/2” OST can attach to MST for overhaul

Question 12

Engine Company Operations
Equipment: Nozzles- Solid stream 2 1/2”

3.6.3- 1) Size 2) Intake and outlet size 3) Required nozzle pressure 4) Flowrate at required nozzle pressure 5) Nozzle reaction at required nozzle pressure 6) Flowrate at +10 nozzle pressure 7) Nozzle reaction at +10 nozzle pressure 8) How to identify

Answer 12

1) 2 1/2” nozzle used with 2 1/2” hose
2) 2 1/2” coupling, 1 1/8” MST for attack
3) 40psi
4) 235 gpm at 40psi
5) 78lbs at 40 psi
6) 265 gpm at 50psi
7) 98lbs at 50psi
8) 2 1/2” marked with white stripe around MST

Question 13

Engine Company Operations
Equipment: Nozzles- Solid stream 2”

3.6.4- 1) Size 2) Intake and outlet size 3) Required nozzle pressure 4) Flowrate at required nozzle pressure 5) Nozzle reaction at required nozzle pressure 6) Flowrate at +5 nozzle pressure 7) Nozzle reaction at +5 nozzle pressure

Answer 13

1) 2” nozzle used with 2” lightweight hose
2) 2 1/2” coupling and 1” MST for attack
3) Requires 50psi nozzle pressure at the tip
4) 210 gpm at 50psi
5) 77lbs at 50psi
6) 220 gpm at 55psi
7) 85lbs at 55psi

Question 14

Engine Company Operations
Equipment: Nozzles- Fog

3.7.1- 2 types of streams

3.7.3- Fog pattern uses (3)

3.7.4- Two classifications of fog nozzles

Answer 14

3.7.1- Straight and Fog

3.7.3- Hydraulic ventilation, disperse gas vapors, fire near electrical equipment

3.7.4- Variable flow and Variable pressure

Question 15

Engine Company Operations
Equipment: Nozzles- Fog

Variable Flow vs. Variable Pressure

Answer 15

VF- Different flow rate depending on pattern. All FDNY fog nozzles!

VP- (non-automatic)- Allow nozzle pressure to change as pattern is adjusted. All FDNY fog nozzles!

Question 16

Engine Company Operations
Equipment: Nozzles- Fog nozzle 1 3/4”

3.7.5- 1) Size 2) Intake and outlet size 3) Required nozzle pressure 4) Flowrate at required nozzle pressure 5) Nozzle reaction at flow rate 6) Which way for each stream

Answer 16

1) 1 3/4” nozzle for 1 3/4” hose
2) 1 1/2” coupling, fog tip
3) 100psi required nozzle pressure
4) 200gpm at 100psi
5) 101lbs at 200gpm
6) Straight stream right, fog stream left. Tight to the right

Question 17

Engine Company Operations
Equipment: Nozzles- Fog nozzle 2 1/2”

3.7.6- 1) Size 2) Intake and outlet size 3) Required nozzle pressure 4) Flowrate at required nozzle pressure 5) Nozzle reaction at flow rate 6) Which way for each stream

Answer 17

1) Use on 2 1/2” hose
2) 2 1/2” to fog
3) 100psi
4) 250gpm at 100psi
5) 121lbs at 250gpm
6) Straight right, fog left. Tight to the right

Question 18

Engine Company Operations
Equipment: Nozzles- Fog tip 2 1/2”

3.7.7- 1) Name 2) Use 3) Intake and outlet size 4) Operating pressure 5) Nozzle reaction at flow rate 6) How to connect

Answer 18

1) Aquastream
2) Fog spray for mass decon
3) 2 1/2” to non-adjustable fog
4) 50-80psi
5) 750gpm at 100psi
6) Apparatus outlet or ladder pipe or 2 1/2” hoseline

Question 19

Engine Company Operations
Equipment: Nozzles- Fog tip Akron Turbomaster

3.7.8- 1) How to connect 2) Use 3) Intake and outlet size 4) Operating pressure 5) GPM (4)

Answer 19

1) Tower ladder waterway
2) Mass decon
3) 2 1/2” coupling to adjustable fog pattern
4) 100psi
5) 500, 750, 1000, 1250 gpm