Apparatus P-3

Question 0

Pro pressure governor (PPG) is

Answer 0

Computer that controls the discharge pressure of the pump by controlling engine RPMS

Question 1

Pump idle pressure is equal too

Answer 1

The pressure the pumps provide at its lowest rpms ( around 55 in volume and 110 in pressure ) plus water intake pressure from water source eg. ( 50 psi from hydrant plus 55 from volume will equal 105 psi pump idle pressure )

Question 2

If you have a pressure on the LED screen of your PPG that is less than pump idle pressure what will happen

Answer 2

PPG will be in active to that point

Question 3

Can you use the PPG in rpm mode

Answer 3

FDNY I pressure mode only

Note in emergency can be used if pressure mode malfunctions in this case any hoselines operating should not advance and should back out to area of safe refuge

Question 4

Static pressure

Answer 4

Pressure indicated on the intake pressure gauge when water not flowing

Question 5

Residual pressure is

Answer 5

Once water is flowing the intake pressure will drop on the intake pressure gauge this is residual pressure and indicates the remaining capability of the water supply

Question 6

Flow meters

Answer 6

Measures rare of flow of water in a confined space as it passes through a given space a given time
Only register reading when water flowing
Represented in GPM

Question 7

Charging pump

Answer 7

1. insure all drains discharges and inlets are closed
2. Open hydrant fully
3. If supplying into gated inlet must open fare fully
   NOTE IF GOING INTO gated inlet then open drain prior to opening gated inlet to expel air

Question 8

If residual pressure drops below what you need to augment

Answer 8

15 psi

Question 9

When should you prime the pumps

Answer 9

After water is introduced into pumps before increasing pump pressures and before opening any discharge gate

Question 10

If using the transfer valve the pump presure gauge should read no more than _____psi above the intake pressure gauge

Answer 10

50psi

Question 11

Who do you notify if intake pressure drops below 15 psi

Answer 11

IC

Question 12

If drafting water you should be in volume or pressure

Answer 12

Volume

Question 13

Line pressure is a product of

Answer 13

Size +number of lengths +nozzle pressure and elevation

1 3/4 hose with 1 5/16 nozzle = 50 psi at nozzle + 20 psi per length friction loss + 5 psi per floor a above grade
21/2 hose with 1 1/8 nozzle = 40 psi @ nozzle + 5 psi per floor friction loss plus 5psi per floor