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255 Cards in this Set
- Front
- Back
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What are the two purposes for testing pumpers
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1. Make sure pumpers meet the standards 2. For statistics for past and future references. pg 380
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Given 1000 gpm capacity pumper, what can it flow at 250 psi?
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500 gpm
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What is the net pump pressure at hydrant?
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Difference between the residual and the discharge pressure
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What is the net pump pressure at draft?
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Sum of the engine pressure, vacuum pressure (suction), and FL or hose/strainer.
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What is considered a good fire stream
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A solid stream that has penetration
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True/False - Driver doesn't have to where turnout gear while driving, but must during an incident?
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True - Have to wear pants
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What can help reduce problems with brakes in rain and standing water?
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Lightly apply the brakes and reduce you speed
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What should you do when going around a curves?
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Slow down before curve. pg 66
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What is range of a pressure governor?
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Operates on all pressures above 50 psi
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Change vacuum to feet?
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L = 1.13 x Hg
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Change feet to vacuum
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Hg = .885 x Height
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Given an EP of 108 and residual of 95 psi. What is the net pump pressure at hydrant of 13 psi?
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13
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What might be the cause of low performance, fluctuating gauges, and poor streams?
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Air leaks
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What is the result of clogged strainer
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High vacuum on suction side. pg 280
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Give constant quantity
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speed of pump ^2
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What is range of vacuum gauge?
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0-30 Hg
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What is a priming valve?
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open when priming
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What is a standby pressure at draft?
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50 psi. pg 267
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What is residual pressure in relay?
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20 psi. pg 194
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What is minimum residual pressure?
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20 psi pg 250
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What is ISO standards for braking?
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35' @ 20 mph
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How many days prior to written test cert must you send in application?
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2 months (60 days)
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Which copy of the Apparatus & Equipment Repair Report goes to BC or Mechanic?
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Original
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How many daily checks on Preventive Indicator Report?
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24
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What is the minimum of time a full tank must last when pumping?
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2 1/2 hrs
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What is the minimum time for priming a 1500 gpm pumper
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45 seconds
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What factors affect draft?
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Weather, temperature or water, and altitude
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What is the effect of water temp on lift?
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If too warm of water over 85 degree sufficient water vapor may be given off and effect pump operations (vapor effects drafting) Erven
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What is the purpose of a clapper valve?
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Directs water to the discharge or to the second stage. pg 213
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How can torque be measured?
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Engine RPM
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What happens when operating the transfer valve?
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In series adds pressure, in volume adds GPM. pg 213
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What is the minimum time for priming a 1250 gpm pumper?
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30 seconds. Add additional 15 seconds if using a front auxiliary suction.
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What can a 1000 gpm pumper pump 1000 gpm
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At rated capacity 150 psi
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When can a 1000 GPM pumper pump 1000 GPM?
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At Rated Capacity 150 psi.
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Given feet determine back pressure
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0.434 X Height
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Given back pressure determine feet.
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2.31 X PSI
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If 80 psi static and 65 residual. How many like volumes can you add?
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0-10% 8
11-15% 12 16-25% 20 The drop was 15 psi it is in the 16-25% range. |
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What is the formula for friction loss?
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2Q^2 + Q = Q
for gpm + 100 Q= GPM/100 2Q^2 + ½ Q = Q for gpm - 100 |
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What is the formula for volume of a cylinder?
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VC = 0.7854 X D X H or L
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What is friction loss of 2 ½” flowing 1200 GPM?
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300 PSI (But max of hose is 250 PSI)
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What affects lift the most?
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Atmospheric Pressure. IFSTA Pg.
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If you have 3 2-1/2” lines and no water flowing. How can you keep the pump cool?
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Crack a drain. IFSTA Pg.
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What is the purpose of the heat exchanger?
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To keep the engine cool. IFSTA Pg.
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What keeps water from going from discharge to suction?
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Clearance Rings. IFSTA Pg. 277
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What is the purpose of packing glands?
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To prevent air or water leaks. IFSTA Pg. 278
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Explain the procedure for putting a unit back in service after a major fire.
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Complete an inventory, check all fluid levels. Min requirement for service is ½ hose, ½ fuel, ½ tank of water.
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What is atmospheric pressure and how do you obtain it.
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14.7 psi, 0.5 psi per 1,000 feet of elevation. IFSTA Pg. 378
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What is an Alert 1-2-3?
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1: is aircraft having minor difficulty. 2: aircraft is having major difficulty. 3: aircraft crashed.
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How do you dress for incidents?
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SOP
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Water hammer cause and effects?
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Caused by nozzles/valves being opened/closed too quickly causing a high pressure surge in hoses/pipes, it can burst hose or damage the pump. IFSTA Pg. 151
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Max. theoretical lift and how is it determined?
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33.8 ft. (14.7 X 2.304 ft.) IFSTA Pg 378
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Which pumps can exceed their rated capacity when supplied?
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Centrifugal
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Fuel tanks are required to supply rated capacity for a minimum of how many hours?
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2-1/2 hours
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Skidding would most likely be caused by what?
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After first light rain.
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Stopping distance is most governed by what?
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Speed
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Bourdon tube tends to do what when pulling a vacuum?
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Contract. ERVEN Pg. 33
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Know the two theories involving centrifugal pumps.
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When pumping at a constant pressure, the quantity of water is directly proportional to the speed of the pump. When pumping at a constant quantity, pressure is directly proportional to the square of the speed. IFSTA Pg.
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What is the primary purpose of a pressure relief device?
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To protect the nozzle person. IFSTA Pg. 293
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Pump capacity is based on how many GPM increments?
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250 GPM. There are six ratings; 500, 750, 1000, 1250, 1500, and 1750. ERVEN Pg. 87
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Pumpers should be tested how often?
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Every year and after major work on engine or pump.
IFSTA Pg. 486 |
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Oxygen bottles should be changed out at what psi?
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500 psi
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Do not let hydrant pressure fall below what psi?
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20 psi
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Compound gauges vs. pressure gauges why?
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will withstand readings.
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If suction strainer where clogged what would the vacuum gauge read?
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High Vacuum.
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Pump should develop at least how many inches of vacuum?
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22” Hg
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How many people are on the accident review committee?
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3 People BC, Captain, Engineer
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Explain your responsibility during an emergency response pertaining to criminal liabilities.
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can not be held liable
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Pumpers shall develop a vacuum at draft in a lift not to exceed how many feet at what psi?
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10 feet at 150 PSI
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What is the difference between delivery test and service test?
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Time, delivery test 3 hr. Service test 40 min. IFSTA Pg. 485
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Spurt test, how many minutes at what psi?
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10 minutes at 165 psi.
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Which pumps have the least amount of components?
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Centrifugal
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Purpose of volute?
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...
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Four rules of friction loss
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1.
2. 3. 4. |
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Six fluid principles.
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1.
2. 3. 4. 5. 6. |
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What is apparatus typing?
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Apparatus typing is intended to make it easier for incident commanders to call for exactly the types of resources need. IFSTA Pg. 20
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What Type Engine is Engine 1?
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Type 1, IFSTA pg 20
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What is maintenance?
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Means keeping the apparatus in a state of usefulness or readiness. IFSTA Pg. 31
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What is repair?
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Answer: Means to restore or replace what which has become inoperable. IFSTA Pg. 31
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What is preventive maintenance?
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Is to try to eliminate unexpected and catastrophic failures that could be life and/or property threatening. IFSTA Pg. 31
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Six fluid principles.
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1.
2. 3. 4. 5. 6. |
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What temperature water should be used when cleaning a new engine?
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Cold water to harden the paint and keep it from spotting. IFSTA pg. 24
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What is apparatus typing?
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Apparatus typing is intended to make it easier for incident commanders to call for exactly the types of resources need. IFSTA Pg. 20
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What type of material should be used when cleaning glass?
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Paper towels or cloth rags. IFSTA Pg. 24
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What Type Engine is Engine 1?
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Type 1, IFSTA pg 20
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When should an engine be waxed?
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After six months old. IFSTA Pg. 25
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What is maintenance?
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Means keeping the apparatus in a state of usefulness or readiness. IFSTA Pg. 31
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On a vehicle with air brakes, how much time is sufficient to build up air pressure to move the vehicle?
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Quick build up should be 60 seconds or less. IFSTA Pg. 34
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What is repair?
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Answer: Means to restore or replace what which has become inoperable. IFSTA Pg. 31
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What is preventive maintenance?
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Is to try to eliminate unexpected and catastrophic failures that could be life and/or property threatening. IFSTA Pg. 31
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What temperature water should be used when cleaning a new engine?
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Cold water to harden the paint and keep it from spotting. IFSTA pg. 24
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What type of material should be used when cleaning glass?
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Paper towels or cloth rags. IFSTA Pg. 24
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When should an engine be waxed?
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After six months old. IFSTA Pg. 25
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On a vehicle with air brakes, how much time is sufficient to build up air pressure to move the vehicle?
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Quick build up should be 60 seconds or less. IFSTA Pg. 34
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At what psi will an air protection valve not allow accessories to be used on the engine?
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Below 80 Psi. IFSTA Pg. 34
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What fluid is in the battery?
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Electrolyte IFSTA Pg. 37
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What kind of road conditions most driving regulations pertain to?
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Dry, clear, roads during daylight conditions. IFSTA Pg. 49
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A driver/operator who does not obey state, local, or departmental driving regulations can be subject to what?
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Criminal and civil prosecution. IFSTA Pg. 49
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What is lugging?
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Occurs when the throttle application is greater than necessary for a given set of conditions. IFSTA Pg. 55
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What are the results of lugging?
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More fuel is being injected than can be burned. This results in an excessive amount of carbon particles issuing from the exhaust (black smoke), oil dilution, and additional fuel consumption. IFSTA Pg. 55
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How do you cruise the engine?
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Choose a gear that cruises the engine at 200 or 300 rpm lower than recommended rpm. IFSTA Pg. 71
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How much fuel can the engine burn when idling?
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Long idling periods can result in the use of ½ gallon of fuel per hour. IFSTA Pg. 72
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What rpm range is fast idle?
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Set the idle at 900 to 1,100 rpm. IFSTA Pg. 72
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How many minutes do you idle the engine before engine shutdown?
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An idle period of 3 to 5 minutes. IFSTA Pg. 72
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Who must be seated and seat belted before the engine is moved?
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All riders on the apparatus. IFSTA Pg. 73
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At what mph and above will sirens outrun the effective range?
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At speeds above 50 mph. IFTSA pg. 85
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At 40 mph how far will the siren project?
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Can project 300 feet. IFSTA Pg. 85
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At 60 mph how far will the siren project?
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Can project 12 feet. IFSTA Pg. 85
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How far apart should apparatus be when following one another to an emergency?
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The apparatus should be spaced 300 to 500 feet. IFSTA Pg. 86
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What are the sources of water supply?
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Surface water or groundwater. IFSTA Pg. 152
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What are the means of moving water?
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Direct pumping system, Gravity System, and Combination System. IFSTA Pg. 152
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What are the different pipes in a water distribution system?
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Primary feeders (16”), Secondary feeders (12”), and Distributors (8”). IFSTA Pg. 156
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What type of valves are in a water system?
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Indicating and nonindicating types. IFSTA Pg. 157
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What is the average daily consumption?
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Is the average of the total amount of water used in a water distribution system over a period of one year. IFSTA Pg. 159
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What is the maximum daily consumption?
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Is the maximum total amount of water used during any 24 hour interval within a three year period. IFSTA Pg. 159
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What is the peak hourly consumption?
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Is the maximum amount of water used in any 1 hour interval over the course of a day. IFSTA Pg. 160
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What is a fire stream?
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Is a stream of water or other extinguishing agent after it leaves a fire hose and nozzle until it reaches the desired point. IFSTA Pg. 165
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What are the three basic types of fire streams?
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solid stream, fog and broken. IFSTA Pg. 165
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What is the maximum gpm for a hand line?
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350 GPM. IFSTA Pg. 171
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What is the maximum gpm for a hand line in the RFD and why?
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325 GPM. Our largest tip is 1-1/4” The largest tip you can safely put on a hand line is ½ the diameter of the hose being used. We use 2.5 not 3 inch hose.
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What is a master stream?
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GPM flows greater than 350 GPM. IFSTA Pg. 171
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When is a master stream used?
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Any fire stream that is too large to be controlled without a mechanical aid. IFSTA Pg. 171
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What is a monitor?
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The device that allows master streams to be directed and angle to be changed while water is being discharged. IFSTA Pg. 172
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What are the three basic monitors?
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Portable, fixed and combination. IFSTA Pg. 172
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What is a turret pipe?
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Is mounted to the fire apparatus deck and connected directly to the pump by permanent piping. IFSTA Pg. 172
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What is a deluge set?
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Consists of a short length of large diameter hose with a large nozzle or large playpipe supported at the discharge end by a tripod. IFSTA Pg. 172
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What is an elevated master stream?
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They may be permanently attached to elevating platforms and prepiped aerial ladders or they may be detachable. IFSTA Pg. 172
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At what gpm flow and greater start adding friction loss for appliances?
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350 GPM add a 10 psi loss for each appliance. IFSTA Pg. 189
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What is a simple hose layout?
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Include single hoselines, equal length multiple hoselines, equal wyed lines, and equal length siamesed lines. IFSTA Pg. 194
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What is a complex hose layout?
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Include standpipe operations, unequal length multiple and wyed hoselines, manifold hoselines, and master streams. IFSTA Pg. 199
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How does a centrifugal pump operate?
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It depends upon the velocity of the water produced by the centrifugal force to provide the necessary pump discharge pressure for effective operation. IFSTA Pg. 270
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What are the two basic types of positive displacement pumps?
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Piston and Rotary. IFSTA Pg.266
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What is a nonpositive displacement pump?
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Centrifugal Pump. IFSTA Pg. 270
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What is cavitation?
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water is being discharge from the pump faster than it is coming in. Also, when air cavities are created in the pump, or bubbles pass through the pump. IFSTA Pg. 337
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What is a static water supply?
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Lakes, rivers, oceans, cisterns, streams, portable tanks, and swimming pools. IFSTA Pg. 382
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What is the process of raising water from a static source to supply a pumper?
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Drafting. IFSTA Pg. 377
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During drafting operations, there is generally an elevation difference between the static water source and the center of the pump what is that difference known as?
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Lift. IFSTA Pg. 377
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When the pressure in the intake hose is less than atmospheric pressure it is called what?
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Vacuum or Partial Vacuum. IFSTA Pg. 377/378
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What happens when the water does not rise to the level of the pump?
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Drafting is not possible. IFSTA Pg. 378
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What is theoretical lift?
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At sea level a pump can theoretically lift water 33.8 ft. (14.7 psi X 2.3 ft./psi). IFSTA Pg. 378
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What is maximum lift?
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The maximum height to which any amount of water may be raised through a hard intake to the pump. IFSTA Pg. 378
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What is dependable lift?
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Is the height a column of water that may be lifted in sufficient quantity to provide a reliable fire flow. IFSTA Pg. 379
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What is the minimum dependable lift?
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14.7 Ft. IFSTA Pg. 379
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How do you determine Net Pump Discharge Pressure?
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pump discharge pressure and subtract the intake pressure (actual pressure created by the pump.) IFSTA Pg. 379
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What is the adequate depth needed for drafting?
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2 ft. in all directions. IFSTA Pg. 338
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What is a dry hydrant?
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Allows easy access to natural sources without the set-up time required for a regular drafting operation. IFSTA Pg. 387
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Describe a relay operation.
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Uses a pumper at the water supply source to pump water under pressure through one or more hoselines to the next pumper in line. IFSTA Pg. 395
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What is a source pumper?
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The pumper connected to the water supply at the beginning of
the water supply. IFSTA Pg. 395 |
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What is the relay pumper?
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Is the pumper or pumpers connected within the relay to boost the supply. IFSTA Pg. 395
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What is the attack pumper?
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The pumper located at the fire scene that will be receiving water from the relay and supplying attack lines and appliances needed for fire suppression. IFSTA Pg. 395
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What is the pressure the pumper is limited to?
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The pressure the hose is tested to. IFSTA Pg. 401
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What is the maximum distance relay formula?
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RP= D+(NP/Fl) x100/(# of pumpers)
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What are the two basic types of foam?
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Mechanical and Aerated Foams. IFSTA Pg. 451
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What is a Chemical Foam?
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Are produced as a result of a reaction between two chemicals. IFSTA Pg.
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What are mechanical foams?
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Must be proportioned mixed with water. IFSTA Pg.451
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What are aerated foams?
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Must be mixed with air. IFSTA Pg. 451
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What is needed to produce quality fire fighting foam?
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Water, air, and mechanical aeration are needed. IFSTA Pg. 451
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What are the four parts to the foam tetrahedron?
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Foam concentrate, water, air, mechanical agitation. IFSTA Pg. 452
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What is a foam concentrate?
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The raw foam liquid as it results in its storage container before the introduction of water and air. IFSTA Pg. 451
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What is a foam proportioner?
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The device that introduces foam concentrate into the water stream to make the foam solution. IFSTA Pg. 451
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What is a foam solution?
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The mixture of foam concentrate and water before the introduction of air. IFSTA Pg. 451
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What is foam?
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The completed product after air is introduced into the foam solution. IFSTA Pg. 451
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What are hydrocarbon fuels?
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Crude oil, fuel oil, gasoline, benzene, naphtha, jet fuel, and kerosene are petroleum based and float on water. IFSTA Pg. 452
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What are polar solvent fuels?
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Alcohol, acetone, lacquer thinner, ketones, and esters are flammable liquids that are miscible in water. IFSTA Pg. 452
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What is the foam concentrate for most fire fighting foams?
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Most fire fighting foam concentrates are intended to be mixed with 94 to 99.9 percent water. IFSTA Pg. 453
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What are the four basic methods by which foam is proportioned?
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Induction, injection, batch mixing, premixing. IFSTA Pg. 453
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What is induction?
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The induction method of proportioning foam uses the pressure energy in the stream of water (Venturi effect) to induct the foam concentrate into the fire stream. IFSTA Pg. 453
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What is injection?
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Uses an external pump or head pressure to force foam concentrate into the fire stream at the correct ratio in comparison to flow. IFSTA Pg. 454
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What is batch mixing?
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When appropriate amount of foam concentrate is poured directly into the tank water. IFSTA Pg. 454
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What is premixing?
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Premeasured portions of water and foam concentrate are mixed in container. Typically in a fire extinguisher. IFSTA Pg. 454
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What is the maximum height an eductor can be above the foam pale?
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6 feet. IFSTA Pg. 464
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What are two categories can apparatus testing can be grouped into?
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Preservice test and service test. IFSTA Pg. 483
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What does the preservice test consist of?
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Preservice test include; manufacturer’s tests, pump certification tests, and acceptance tests. IFSTA Pg. 483
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What is a service test?
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Service test are conducted on at least a yearly basis, after major engine work, and after pump work. IFSTA Pg. 486
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Who performs the certification tests?
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Personnel approved from UL. IFSTA Pg. 485
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During the road test the apparatus must accelerate to 35 mph in how many seconds?
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25 seconds. IFSTA Pg. 484
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The apparatus must achieve what minimum top speed?
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50 mph. IFSTA Pg. 484
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The apparatus must come to a full complete stop from 20 mph in how many feet?
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35 feet. IFSTA Pg. 484
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To what pressure are pumps hydrostatically tested too?
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250 psi for 3 minutes. IFSTA Pg. 484
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Where are the results of the pumper’s certification test to be placed?
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Affixed to the pump panel of the apparatus. IFSTA Pg. 485
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What test does NFPA 1901 require for apparatus equipped with a 750 gpm or larger fire pump?
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Pumping test, Pumping engine overload test, Pressure control system test, priming device test, vacuum test, and water tank to pump flow test. IFSTA Pg. 485
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Why are acceptance test performed?
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To insure the purchaser that the apparatus meets the bid specifications. IFSTA Pg. 485
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Where does NFPA 1911 say that the pumper test may be conducted using what type of water source?
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From a fire hydrant or static body of water as a supply source. IFSTA Pg. 486
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When conducting the pumping test using fire hose, and the scribe mark moves more than _____ inches away from the coupling, stop the test and replace the hose.
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3/8 inch. IFSTA Pg. 487
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At what pressures is the pump to be tested at?
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150 psi, 165 psi, 200 psi, and 250 psi. IFSTA Pg. 487
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What is the formula for correcting net pump discharge pressure for the test?
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Pressure correction = Lift + intake hose friction loss/(2.3)
For example 150 psi – 8 psi = 142 psi. IFSTA Pg. 488 |
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During the vacuum test no more than 10 inches of mercury should be lost in how many minutes?
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5 minutes. IFSTA Pg. 495
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How often are readings made and recorded during the pumpers test?
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At the beginning and every 5 minutes. IFSTA Pg. 498
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How many minutes do test pumper at 150 psi?
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20 minutes. IFSTA Pg. 498
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How many minutes do test pumper at 200 psi?
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10 minutes. IFSTA Pg. 498
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How many minutes do test pumper at 250 psi?
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10 minutes. IFSTA Pg. 498
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How many minutes do test pumper at 165 psi?
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10 minutes.
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When the pressure control devices dumps the pressure what is the max pressure it can rise above the set pressure initially?
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30 psi. IFSTA Pg. 499
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How do you check that pressure gauges correspond with one another?
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Close all nozzles the discharge gauges should correspond with the master discharge gauge. IFSTA Pg. 500
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If any of the gauges are off more than _____ they should be recaliberated, repaired or replaced.
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10 psi. IFSTA Pg. 500
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How do you reduce friction loss?
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Hose length, Hose diameter, and Sharp bends or kinks. IFSTA Pg. 150
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What is a triple pumper?
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A triple consist of fire pump, water tank and fire hose. ERVEN Pg. 17
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What is a Quadruple Pumper:
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A quad is a long-wheel based, triple combination pumper with a minimum of 198 feet of ground ladders. This type of apparatus is no longer common. ERVEN Pg. 17
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What is a Quintuple Pumper?
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A Quint consist of an aerial ladder, a complement of ground ladders, a fire pump, a water tank and fire hose. ERVEN Pg. 18 IFSTA Pg. 22
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What type of pressure gauges are there?
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Vacuum gauge, straight pressure gauge, and compound gauges.
ERVEN Pg. 31 |
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What is a vacuum gauge?
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Measure any pressure below atmospheric pressure. ERVEN Pg. 31
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What is a Straight pressure gauge?
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Indicate positive pressure above atmospheric pressure.
ERVEN Pg. 31 |
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What is a compound gauge?
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Indicate both positive and negative pressures. The zero reference point on the gauge actually represents atmospheric pressure. ERVEN Pg. 31
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All pressure gauges are of what type?
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Bourdon type. ERVEN Pg. 33
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What is slip?
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Slip is leakage between internal parts of the pump. The amount of slippage is dependent on the condition of the pump. ERVEN Pg. 81
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What is the action of the volute?
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The action of the volute is to enable the pump to handle this increasing quantity of water and maintain the velocity of the water.
ERVEN Pg. 86 |
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What is the cause of cavitation?
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Is caused by reducing the absolute pressure on water below its boiling point. ERVEN Pg. 98
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What size vent hole is in the highest part oil siphon tube to the priming pump to break the siphon effect?
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Size No. 60 ERVEN Pg. 106
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What is a Class A pumper?
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In 1950 a change to testing pumpers was made. New test established Class A pumpers with rated capacity of 150 psi 100%, 200 psi 70% and 250 psi 50%. ERVEN Pg. 151
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What is a Class B pumper?
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Class B pumpers are before 1950. The test consisted of 6 hour run at 120 psi, and a 3 hour run at one-half capacity of 250 psi. ERVEN Pg. 151
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What is the relay formula?
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Number of pumpers = (FL + BP + NP)/200
ERVEN Pg. 195 |
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What are the different kinds of pressure?
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Static Pressure, Normal Operating Pressure, Residual Pressure, and Flow Pressure. IFSTA 144-146
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What is static pressure?
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If the water is not moving the pressure is static. IFSTA Pg.144
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What is Normal Operating pressure?
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Is the pressure found in a water distribution system during periods of normal consumption. IFSTA Pg.145
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What is residual Pressure?
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Residual Pressure is that part of the total available pressure that is not used to overcome friction or gravity while forcing water through pipe, fittings, fire hose and adapters. IFSTA Pg.146
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What is Flow Pressure?
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Is the forward velocity pressure at discharge opening, either at a hydrant discharge or a nozzle discharge orifice, while water is flowing. IFSTA Pg.146
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What is a chaffing block?
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Chafing blocks are devices that are used to protect fire hose where the hose is subjected to vibrations from the pump. IFSTA 4th Pg. 413
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What is a low volume stream?
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Discharge less than 40 GPM. IFSTA 4th Pg. 491
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What is the point of breakover?
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A stream that does not lose its continuity until it reaches the point where it loses its forward velocity. IFSTA 4th Pg. 493
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What is considered a good fire stream?
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A stream that ¾ of it passes through a 10 inch circle, and 9/10 of it passes through a 15 inch circle.
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What is PSIA?
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Absolute Pressure (gauge plus 14.7)
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What is PSIG?
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Gauge Pressure (what the gauge reads)
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What is the formula for engine spacing?
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Spacing = 200 PSI (Working Pressure) – 20 PSI (Intake Press.)/(FL Per 100’)
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What is the barometer reading at sea level?
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29.92 Hg”
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What is a perfect vacuum?
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29.92 Hg"
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Convert Celsius into F°.
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(9/5 X C°) + 32
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Convert F° into Celsius.
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5/9 (F° - 32)
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What is the pressure exerted by a column of water 1’ high?
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0.434 PSI
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Height of a column of water required to exert 1 psi?
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2.304
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Total gallons discharged from 6 sprinkler heads, 30 psi at the head for a period of 20 minutes?
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½ 30 + 15 X 6 X 20 = 3600
( ½ P + 15 ) X # of heads X time |
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How do you convert cubic inches to gallons?
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Divide by 231.
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If a vacuum gauge on a pumper reads 10” of hg. To what height will water rise in the suction hose?
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11.3 ft. 10 X 1.13
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Pump capacity of a 1250 GPM pumper operating at 70% is _____GPM?
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875 GPM 1250 X .7 = 875
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What is the max nozzle reaction for a ladder pipe?
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400 lbs.
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Can a 2” tip be used on a ladder pipe?
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NO the max nozzle reaction is 400 lbs.
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What is the most common cause of water hammer?
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Shutting off nozzle too quickly.
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The type of pump least likely to be effective as a priming pump is the?
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Centrifugal
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What does 6V71 indicate when referring to a diesel engine?
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A V6 Engine with 71 cubic inches per cylinder
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What are the GPM’s for a 1500 GPM pumper @ 150 psi, 200 psi, 250 psi?
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1500 GPM, 1050 GPM, 750 GPM
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What are the tip sizes used on a 1500 GPM pump test?
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100% - 2 3/8”, 70% - 2”, 50% - 1 5/8”
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What is the standard psi used for a standard size sprinkler head?
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30 PSI
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What is the GPM rating for a standard size sprinkler head?
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15 GPM
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What size are sprinkler head openings?
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½”
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What area does a sprinkler head cover?
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100 Square feet.
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Why do you pump 150 psi to a sprinkler system?
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The unit should be set up to pump capacity because of unknown # of heads
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At 20 GPM, a 1000 gpm pumper can supply 50 heads. The pumper will need how many lines to the sprinkler hook up?
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1-4”, 2-2-1/2”.
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How is the pitot gauge placed in a stream for accurate measurement?
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½ the diameter of the tip, slightly off center of the stream, away from the tip.
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What does the word adiabatic refer to?
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Heat of Compression.
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An increase in engine rpm without a corresponding increase in pressure indicates?
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Cavitation
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What is the primary function of a fire department pumper?
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To deliver water to the fire at the correct nozzle pressure. IFSTA Pg. 13
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What is the rule of thumb for vertical reach?
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1 lb psi = 1 ft. distance
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In a positive displacement pump, the quantity of discharge is directly proportional to the ______ of the ______.
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Speed of the pump.
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What is the minimum weight for a class B license?
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26,001 lbs.
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What should always be done after a light water operation?
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Pump must be thoroughly flushed and equipment cleaned.
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What is DP30?
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Deep Penetrating 30
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Will the metering valve change the % of light water to water?
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No, the percent remains 6% for all settings. The metering valve adjust for the size of the hose.
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