Part 3 Ch. 7-9 Fire Apparatus and Pumps

Question 1

Water Tender

Weight capacity on axles

Answer 1

• NFPA to be considered tanker must 1,000 Gallon tank and minimum 10 cubic feet space
• If equipped with pump must have same capacity of fire pumps and carry 15’ supply hose or 20’ hard intake with strainer + minim 100ft 1 ½ -2” hose and a 1 combo nozzle 95gpm
• T-Shaped tanks on single axle 1500 gal
• Single rear axle limited to 2,000 gall
• Double rear axle limited to 4,000 gall
• If want to transport more than 4,000 gall of water on a single truck need tractor/trailer
• Pumper-Tankers (tankers with pumps carry as much as 3,000 gall) dis-advantage is they’re slower to respond due to sheer size

Question 2

NFPA required hydrostatic test

Answer 2

Pump tested to 250psi for 3 minutes with discharges open and capped

Question 3

If Driver unsure to use Pressure or Volume mode default to…

Answer 3

Volume mode because it can supply 100% of pump capacity at 150psi

Question 4

When performing changover, recommended max PSI for standard and Power Operated changeover/transfer valve

Answer 4

• Standard: 75 psi
• Power Operated: 200 psi
  -can present huge danger to truck and people on line. Operate with care

Question 5

Power operated changeover/transfer valves

Answer 5

• can do so during pressure as high as 200psi which can present huge danger to truck and people on line. Operate with care

Question 6

Pumping Test

Answer 6

• *3 hrs long for trucks 750gpm or higher
• 100% Pump rated capacity at 150psi for 2 hours
• 70% Pump rated capacity at 200psi for ½ Hour
• 50% Pump rated capacity at 250psi for ½ Hour
• Pump must not be stopped for 2hr portion unless to clean strainer, pump may be stopped between 3 portions of test (fuel,strainer,nozzles,etc)
• Volume, Intake/Discharge Pressures, and RPM recorded every 15 minutes*

Question 7

Pumping Overload Test

Answer 7

• Only trucks greater than 750gpm
• NFPA requires test perform immediately after 2hr test
• Require to flow 100% rated capacity at 165psi for at least 10 minutes
• Results recorded at least 3 times

Question 8

Pressure Control System Test

Answer 8

Ensures Pressure Relief Devices work reducing the dangers of overpressurization