Condensed q method friction loss This is a fireground method of calculating friction loss for (Using condensed Q formula: Developed for fire ground operations in which friction loss can be determined for 3, 4, & 5 inch hose. Using the condensed Q method, the friction loss for 500 feet of 3 inch fire hose flowing 300 gpm is? 45 psi. Two 1,000 ft-3" hose are connected with a connector appliance. From the connection, there is a single 300 ft. d. determine friction loss rate q = quantity. Always start at the nozzle and work your way back to the pump. As water passes through a fire hose, friction between the water and the inside surface of the hose cause turbulence. Going up by 100 gpm add 2 psi so 1000 gpm would be 8 psi 1100 would be 10psi. Apr 30, 2024 · Using the hand method, for each 100-foot length of 1¾-inch hose flowing 200 gpm, the friction loss is 48 psi: 2 x 4 x 6 = 48 psi. Total Friction Loss F - Friction Loss #1 from nozzle back to the 1st appliance F - Friction Loss #2 from 1st appliance back to the pump or next appliance E - Elevation Loss or Gain in the hose layout Oct 10, 2019 · Calculating friction loss for 3 inch hose on the fire-ground using the Q squared method. Let’s try a flow of 350 gpm, 3 x 4 equals 12, which is the friction loss in 100 feet of 3” hose. This video reviews how to use the "Q" Method of calculating friction loss. Use the appropriate formula for the size of hose. The finger method is very simple. 5 gallons 1 Gallon of water contains 8. Compare the results. Need to create an account? Forgot password? Using the condensed "Q" formula, calculate the friction loss for 100 feet of 5-inch hose line, flowing at 500 gpm. D. Line 2 is 800 feet of 3-inch hose flowing 300 gpm. An 1 3/4" hose 200 ft long flowing 180 gpm would work out like this: FL= 15. c. Note the amount of friction loss calculated using this formula will be 20% greater than if the same situation is calculated using FL=CQsqL) Oct 17, 2019 · The coefficient method of calculating friction loss in attack lines is demonstrated for an 1 3/4" and 2 1/2" attack lines. For the same discharge, friction loss varies inversely as the 5th of diameter of hose. Line 1 TPL = 96 psi. 50 percent less than that of a single hoseline at . Q = flow in 100's of gpms. 0 psi Jan 11, 2022 · In relay operations, the driver may feed a supply line without having to know the volume of water flowing from the receiving pumper. 25 percent less than that of a single hoseline at the same nozzle pressure. Oct 1, 2012 · You calculate the factor by using friction loss rule #4, which states: “If the flow stays the same, the friction loss varies inversely as the fifth power of the diameter of the hose. Using the coefficient method to determine the pressure loss due to friction in the hose assembly. 800 gpm would be 5 and so on and so forth Using the hand method, determine the total pressure loss due to friction in 200' of 2. 3, 4, or 5-inch hose. State the equations for determining friction loss using the Condensed “Q” formula. any diameter of hose. any handline hose. 66 pounds of water equals: Email Address. Select facts about the GPM flowing method. BASIC CONCEPTS & FORMULAS FIRE DEPARTMENT HYDRAULICS BASIC CONCEPTS & FORMULAS WATER MEASUREMENTS 1 Cubic foot of water weighs 62. (gpm flow method charts) A lesson in calculating the amount of friction loss in fire hose. 2. The friction loss in 300 feet of 3,' fire hose wirh 2%" couplings flowing 500 gpm is approximately: A. Nov 16, 2014 · 11. 145 psi For five inch our rule of thumb is to remember 96. 45. m. 50 psi. 5 Sep 5, 2024 · Friction Loss FL = C Q2 L Elevation Pressure EP = 5 psi × (number of stories – 1) or EP = 0. Best type of strainer to use in a shallow stream is a: – Pressure lost from turbulence as water passes through pipes, hoses, fittings, adapters, and appliances – Measured in psi or kPa 4 Friction Loss (2 of 2) • Modern FL equation: FL = C Q2 L – Widely accepted as fire service standard – Success of equation is due to its ability to adapt to changes in hose diameter, water flow, and hose The condensed Q method formula cannot be used with _____ measurements The condensed Q formula may be used for operations in which the friction loss can be what will be the tpl due to friction in 450 feet of 4 inch hose flowing 750 gpm 50. How do you calculate friction loss in a fire hose? The condensed Q formula may be used for operations in which the friction loss can be determined for __,___, ___ inch hose Pg 287 Study with Quizlet and memorize flashcards containing terms like 212. Methods like the old hand, new hand, drop 10, and the condensed “Q” are just a few that you may have When two hoselines of equal length are Siamesed to supply a fire stream, friction loss is approximately: Select one: a. 61 Condensed Q Method (3 of 9) Condensed Q method in a relay operation When two pumpers arrive at the scene at the same time, the first pumper positions for attack while the other lays a line from the attack pumper to a hydrant to establish a water supply. Friction loss for a specific hose being used. Would be 100. When responding to emergencies, apparatus should: Turn on headlights as part of the emergency response. For a 3-inch supply line flowing 300 gpm, the friction loss per Pumping Apparatus Driver/Operator — Lesson 9 Pumping Apparatus Driver/Operator Handbook, 2 nd Edition Chapter The condensed "Q" formula for a 4-inch hoseline is: Using the hand method to calculate foreground pressure losses, the estimated friction loss for 100 feet of 2 1 Study Chapter 9 Fireground Hydraulic Calculations flashcards from Duke Bradbury's class online, or in Brainscape's iPhone or Android app. 5, for 2 1/2" its 2. The friction loss formula allows you to calculate the friction loss you experience from the pump to the nozzle. B: The method may be used for operations with any size hose. Password. Study with Quizlet and memorize flashcards containing terms like Which statement about the gpm flowing method is most accurate?, Using the condensed Q formula, what is the total pressure loss in 500 feet of 4-inch hose flowing 1000 gallons per minute?, Which type of flow meter uses a sensor to measure the speed at which it spins and translates the information into a flow measurement? and more. 4. 5 psi B. Using the hand method, determine the total pressure loss due to friction in 600 feet of 2. Which of the following statements about the condensed Q method is MOST accurate? A: The formula cannot be used with metric measurements. Going DOWN by 100 minus 1 psi. The condensed Q formula may be used for operations in which the friction loss can be determined for: a. 50 psi . 23 Q What is the first step in developing a pump chart? What size of hose can the condensed Q method be used? What is the Condensed Q formula for 3-inch hose? FL = Q^2. FL = C(Q/100)^2 X (L/100) FL: Friction Loss in PSI C: Friction Loss Coefficient (depends on hose) Q: Flow Rate in GPM L: Hose Using the condensed Q formula, what is the total pressure loss in 500 feet of 4-inch hose flowing 1,000 gallons per minute? Select one: a. 150 psi . Condensed Q formula for Oct 10, 2019 · Using the Q squared method with conversion factors to calculate friction loss in 2 1/2 inch hose on the fire-ground. 500 psi See page 288 c. Driver/operator must be aware of the margin of difference when using the condense Q formula. 45 psi . 60 psi c. This training video covers the standard coefficient method of determining friction loss in hose lines. o. It also demonstrates how several of the concepts of fr Study with Quizlet and memorize flashcards containing terms like What methods for determining pressure loss and pump discharge pressure can a driver/operator use during emergency operations?, Flowmeters measure and display water flow in gallons (liters) per minute, and the number requires:, The number displayed by a flowmeter reflects water pressure that will be discharged through the nozzle -Subtract 10 from the first two numbers of the gpm flow in order to derive a sufficiently accurate friction loss figure per 100 feet of 2 1/2" hose for flows ranging from 100-300GPM-Subtract 10 from the first two numbers of the GPM flow and add back the 1st digit in order to derive a sufficiently accurate friction loss figure per 100 feet of 2 1/2" hose for flows ranging 301-500GPM This video is a review of how to calculate friction loss for firefighters using the hand method. 2-1/2" hose with a 1-1/4" tip nozzle flowing at 50 psi. Methods like the old hand, new hand, drop 10, and the condensed “Q” are just a few that you may have Study Chapter 8 flashcards from Crystal Plasters's class online, or in Brainscape's iPhone or Android app. So far the "rule of thumb" method most closely resembles our friction loss profiles. s. C) The total water flow through the pump for the duration of the incident as well as the amount of foam being flowedD) The amount of water left in the tank FL- friction loss C- coefficient Q ²- flow rate and hundreds of GPM flowmeters hydraulic calculations pump charts hand method condensed Q formula GPM flowing Study with Quizlet and memorize flashcards containing terms like During emergency operations, driver/op-erators commonly use one or more of the following methods of determining pressure loss and pump discharge pressure:, Mechanical device installed in a discharge line that senses the amount of water flowing and provides a readout in units of gallons per minute, Flowmeters measure and display Study with Quizlet and memorize flashcards containing terms like Flowmeters reflect water pressure that will be discharged through the nozzle:, Flowmeters are especially advantageous when automatic nozzles are employed with handlines or master stream devices because automatic nozzles may lead driver/operators to:, Which of the following statements about the flowmeter is MOST accurate? and more. 20 psi. This number affects the pump discharge pressure needed to achieve your desired flow rate. That amount of pressure however, is directly affected by the amount (gpm) of water flowing through the hose. Calculating Method for PDP a. 150 psi. B) The total water flow through the pump in real time. 20 psi b. Calculate the friction loss in the same scenario using the condensed Q formula. Methods like the old hand, new hand, drop 10, and the condensed “Q” are just a few that you may have learned. Friction loss (FLa) for the line supplied by the siamese: c. b. 8 x 1. Line 1 TPL = 192 psi. I use a Polish Calculator or finger method for the fireground or when sitting around with time to contemplate, use this equation. a. The condensed Q formula may be used for operations in which the friction loss can be determined for: 3, 4, or 5-inch hose. Line 1 TPL = 48 psi. 35 pounds 1 Gallon of water contains 231 cubic inches HEAD AND […] Using the condensed Q formula, what is the total pressure loss in 500 ft of 4-inch hose flowing 1,000 gallons per minute? 100 psi Using the condensed Q formula for 5-inch hose, what is Q^2 divided by? Dec 18, 2007 · As to where I come up with the friction loss figures. 5" hose when a fog nozzle is flowing 150 gpm at 100 psi. Pump discharge pressure for the hose configuration: 8. Which method of determining friction loss involves the use of in-line gauges to measure friction loss at various flows through specific hose layouts? Theoretical Hydraulics, formulas and friction loss, properties of water, water systems, nozzles etc Using the Condensed "Q" Formula, determine the total pressure loss for each line": Line 1 is 600 feet of 3-inch hose flowing 400 gpm. What percent greater will the friction loss result be than the traditional formula when using the Condensed Q formula? 20 percent How many times more water would a 2 1/2 inch hoseline need to be flowing to equal the same friction loss in a 1 1/2 inch hose line? Sep 6, 2024 · 300 ft of hose with 10 psi loss per 10 ft = 30 psi FL PDP = NP + FL = 50 + 30 = 80 psi Example 2: Do the same problem using the Q formula. FL = C Q2 L or 2 × (2) 2 × 3 = 24 psi FL PDP = 50 + 24 = 74 psi Using the Condensed Q Method To use the condensed Q method, follow these steps: 1. Q² (Q/100 2) Term. Describe when use of wheel chocks is required Nov 13, 2010 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Condensed Q method of estimating friction loss works on what size hoses? Condensed Q formula for 3" hose? Definition. 0 psi. 1- or 2-inch hose. 55 psi. This is a fireground friction loss method that will give you the friction loss in There are many ways to estimate the friction loss in fire hose. 10 percent more than that of a single hoseline at the same nozzle pressure. The gpm flowing method may be used: Friction Loss. If water is flowing through 200 feet of 5-inch hose at 300 gpm, then the theoretical friction loss is approximately: 2. PDP = Nozzle Pressure + Total Friction Loss b. Conceivably, the most accurate method to determine friction loss is to conduct your own tests. Line 2 TPL = 72 psi. and more. determine friction loss rate quantity - example – 2q 2 250 g. 1. FL = Friction loss in psi for 100 feet of 3 inch The gpm flowing method is applicable to both Oct 10, 2019 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Which method of determining friction loss involves the use of in-line gauges to measure friction loss at various flows through specific hose layouts? Performing tests What is the primary consideration for friction loss? Study with Quizlet and memorize flashcards containing terms like When a line is shut down during standpipe operations and the driver/operator is operating an apparatus equipped with a flowmeter, the driver/operator should:, Flowmeters measure and display water flow in gallons or liters per minute, and the number requires:, The number displayed by a flowmeter reflects water pressure that will Question: Firefighting strategies and technology. Two lines, one a siamese and the other a single line, each of the same total length and flow, no elevation, see Figure Jul 20, 2001 · I am working on rewriting our dept's friction loss formulas. SO, a 1½ hose flowing 50 gpm that has 10 psi friction loss per 100 ft is equal to a 2½ inc hoseline flowing ___ gmp. 125 psl . the same as that of a single hoseline at the same nozzle pressure. By doing this you will know, with almost exact Mar 25, 2015 · Non-pre-piped Aerial Apparatus: Calculate friction loss for the flow in hose in ladder bed 3” or 3 ½” and 100 feet long + 10 PSI for the Siamese appliance + 10 PSI for nozzle appliance + nozzle pressure + elevation loss. Using the condensed Q method , the friction loss in 500 feet of 3 - inch fire hose flowing 300 gpm is : A. FL= friction loss per hundred foot C= coefficient Q= quanity of water in hundred of gpm L= length of hose in hundred of feet Coefficient of 1 3/4" hose is 15. This turbulence reduces the energy produced by the pump (PSI). The “Q” Formula Hand Lines Supply Lines Hose size Friction Loss Formula Hose size Friction Loss Formula 1 ½” 24Q² 3” Hose Q² 1 ¾” 12Q² 3 ½” Hose Q² ÷ 3 2” 6Q² 4” Hose Q² ÷ 5 2 ½” 2Q² 5” Hose Q² ÷ 15 ¾” Booster 1100Q² 1” Forestry 150Q² ESTIMATING SQUARES Jan 13, 2000 · The answer reflects the amount of pressure (psi) lost due to friction loss. Which of the following statements about friction loss is MOST accurate? A)Friction loss in a water system increases as length of hose or piping increases. 1 / 29 nozzle without knowing the length of the hose,friction loss or Q= 200gpm divided by 100 =2 FL = 2² = 4 psi per 100 feet 3-inch hose. Try the formula with various volumes of water being flowed, and the principle should become evident. q = 2. fog nozzle . 12. Nov 16, 2019 · Take the 1st digit of the flow (gpm) and multiply it by the 1st digit of the next number immediately below it. Using the condensed Q formula , the friction loss in 600 feet of 3 - inch hose flowing 500 gpm is approximately . 0 psi A quantity of 16. 100 psi . 175 psi Using the condensed Q formula, what is the total pressure loss in 500 feet of 4-inch hose flowing 1,000 gallons per minute? 100 psi Which statement about the flowmeter is MOST accurate? Using the condensed "Q" formula, calculate the friction loss for 300 feet of 3-inch hoseline, flowing at 300 gpm, 27. Line 2 TPL = 27 psi. f. 900 GPM is roughly 6 psi of friction per 100' of 5". ” Friction loss is pressure used to overcome resistance while forcing water through fire hose, pipes, and appliances. 60 psi. To calculate the friction loss, it is necessary to know the following: the volume or quantity of water flowing (expressed in gpm) the size of the hose; the length of the lay; There are many ways to estimate the friction loss in fire hose. What is the Condensed Q method used for? Study These Flashcards. D: The formula can be used with both customary and metric measurements. 100 psi My channel provides training videos for may aspects of firefighter training including pump operations, building construction for fire officers and other fire Aug 31, 2023 · QUESTION 13 1 - "Splurgy" Calculate the total friction loss using the condensed Q method by using the following details (rounded to the nearest whole number). C. 12 psi. Study with Quizlet and memorize flashcards containing terms like Squaring the lines method, Theoretical formula, UL discharge formula and more. q = gpm. FL=CQ2L C= friction loss coefficient Q=flow rate in hundreds of gpm L=hose length in hundreds of feet. Calculate the friction loss in 200 feet of 3-inch hose with a 300 GPM fog nozzle using the formula Q (Q + Q + 1). Some apparatus are equipped with a central flowmeter monitoring device that allows the driver/operator to monitor all the following except - A) The flow through any specific discharge. L = number of 100 ft joints of hose. , 213. Study with Quizlet and memorize flashcards containing terms like Flow meters, hydraulic calculators, pump charts, Condensed Q method, and GPM flowing are all methods to determine what?, What is the purpose of hydraulic calculators?, _____ reduce the number of pressure calculations required of the driver. 4 inches FL=Q²/5 FL per 100 feet = Q square divided by 5 Q= number of hundreds of gallons per minute Example pressure loss in 500 feet 4-inch flowing 1,000 gallons Q= 1,000 gpm divided by 100 = 10 Fl= 10²= 100 dived by 5 = 20 psi per 100 feet 4 inch Dec 11, 2024 · Which is a friction loss guideline in a hose assembly when flowing 350 gpm (1 400 L/min) or greater? - Answer There is a loss of 10 psi (70 kPa) for each appliance, other than master stream devices. C: The method provides the most accurate readings of any method. Jan 1, 2025 · Using the condensed Q method as a "ru1e of rhumb,,, the friction loss in 500 feet of 3" fire hose flowing 300 gpm is: A. Line 2 TPL = 9 psi. The FL=CQ2L method is popular for figuring friction loss. Line 1 TPL = 16 psi. 5 x 1. What is a firehose friction loss? A firehose friction loss can be defined as a measure of the effect of the resistance of water against the inner side of a firehose, which typically results in a pressure drop at the terminal end. hose. Learning Objectives 13. Siamese line, no elevation, see Figure 1222. Learn faster with spaced repetition. Determining Friction Loss Using the Condensed “Q” Formula 4-inch hose FL per 100 feet = Q2 5 FL = Friction loss in 100 feet of 4-inch hose Q = Number of hundreds of gpm Determining Friction Loss Using the Condensed “Q” Formula 5-inch hose FL per 100 feet = Q2 15 FL = Friction loss in 100 feet of 5-inch hose Q = Number of hundreds of gpm The friction loss in a 1½-hose is equal to the friction loss in a 2½ inch hose that is flowing four times as much water. May 24, 2022 · The condensed Q formula may be used for operations in which the friction loss can be determined for a: 3, 4, or 5 inch hose. Also, describe when it is permissible to exceed the speed limit. A Determining estimates for friction loss on the fire ground for 3”,4” and 5” hose. Scenario 5 = Drafting Produce effective hand or master streams, given the sources specified in the following list so that the pump is engaged, all pressure control and vehicle safety devices are set, the rated Mar 10, 2021 · Question 2 4 out of 4 points While solving the Condensed Q friction-loss 15 points Calculate the total friction loss using the Q 2 method by using the following 7. 8 x 2. 100. As you up the throttle, the discharge reading on the flowmeter will rise at the corresponding level and you up the throttle until the flowmeter reading no longer exists, which means that you established correct discharge pressure to supply adqequate volume to the Dec 15, 2010 · Basic Friction Loss calculations using the friction loss and the pump discharge pressure formulas. The result is friction loss per 100′ of 3” hose. So, the higher the flow, the greater the friction loss. The higher the gpm passing through a hose or pipe, the more turbulence and friction loss will result. This method is known as Q2 or condensed Q. (In Metric) Study with Quizlet and memorize flashcards containing terms like Describe the responsibilities pertaining to the role of Engine Driver when approaching stop signals or stop signs while responding to an emergency call. 5-inch hose Volume = 800 GPM Hose Length = 500 feet Formula: Q2/15 4 12 21 64 10 points. Fl = K * Q * Q * L Where K is a constant for the size of hose. This entails testing & indexing a sample group of over 200 sections of 1-1/2, 1-3/4,2-1/2,3in,&5in hose. 55 psi . 14. . A. 100 psi d. As a result, the PSI at the other end of the hose will be lower. Although sufficient for mini fairground calculations, the friction loss results will be 20% greater than when using the FL= CQ^2L. q = 250. 9. The friction head loss, H L H_\mathrm{L} H L , can be estimated by the empirical Hazen-Williams friction loss formula using the pipe dimensions — Length, L L L, diameter, D D D, volumetric flow rate, Q Q Q, and the roughness coefficient, C C C, as: flowmeters,hydraulic calculators,pump charts,hand method,condensed q formula,gpm flowing. 12 psi . 5 × Height Appliance Losses for High-Flow Devices (flows greater than 350 gpm)Hose Diameter (inch) Device Appliance Loss (psi) Wye and Siamese 10 Ram XD 10 Standpipe and FDC 10 Elevated master stream and deck gun monitors 25 Dead Pump 25 Feb 27, 2022 · To calculate the friction loss, it is necessary to know the following: the volume or quantity of water flowing (expressed in gpm) the size of the hose; the length of the lay; There are many ways to estimate the friction loss in fire hose. Use the Condensed “Q” formula to calculate total pressure loss. Use the GPM flowing method to calculate total pressure loss. 5 pounds 1 Cubic foot of water contains 1,728 cubic inches 1 Cubic foot of water contains 7. Oct 1, 2015 · Examples include the National Board of Fire Underwriters formula (2Q2+Q), the “condensed Q” formula for three-, four-, and five-inch hose (Q2), and the modern coefficient formula (CQ2L). p. (Continued) Pumping Apparatus Driver/Operator. May be used for operations in which the friction loss can be determined for 3 inch, 4 inch, or 5 inch hose. 7 psi Hard suction hoses generally have a diameter of between? 212. Using the condensed "Q" formula, calculate the friction loss for 300 feet of 3 inch hose line, flowing 300 gpm 27. , Describe when use of backers when backing apparatus is required. Friction loss (FLs) for the lines supplying the siamese: b. To calculate the friction loss, it is necessary to know the following: . B. 45 psi. Condensed "Q" Formula (for 3-inch hose) FL per hundred feet=Q2 Mar 12, 2025 · Study with Quizlet and memorize flashcards containing terms like Which of the following statements about the condensed Q method is MOST accurate?, Which type of flowmeter has only one simple moving part and therefore tends to require little maintenance?, The number displayed by a flowmeter reflects water pressure that will be discharged through the nozzle if the hoseline: and more. 625 what will be the tpl due to friction in 900 feet of 5 inch hose flowing 950 gpm Using the "condensed Q" method as a "rule of thumb," the friction loss in 500 feet of 3-inch fire hose flowing 300 gpm is: 2 The difference between high-energy and low-energy foam systems is thatthey introduce: Which method of determining friction loss involves the use of in-line gauges to measure friction loss at various flows through specific hose layouts? Performing tests What is the primary consideration for friction loss? Include master stream friction loss correct length for wyed hose lines round to nearest 5psi don't exceed test pressures Don't exceed max PDP 284-285 What is the condensed Q formula used for 3,4,or 5 inch hose (3"- FL= Q²) (4"- FL=Q²/5) (5"- FL=Q²/15) Q=GPM 287 Oct 8, 2024 · Study with Quizlet and memorize flashcards containing terms like What is the main purpose of using a flowmeter in fireground operations? (A) To measure water flow in GPM (B) To calculate pump discharge pressure (C) To regulate nozzle pressure (D) To calculate friction loss, Which flowmeter type measures water flow using a probe that extends into the waterway? (A) Spring probe flowmeter (B Study with Quizlet and memorize flashcards containing terms like Flowmeters can be used to assist the driver/operator in all of the following applications except:, The condensed Q formula may be used for operations in which the friction loss can be determined for:, Which statement about the gpm flowing method is MOST accurate? and more. xjzyny cgl rnr dprmkx cyne vapsmhvn rwxbd dtlmbs afeqntw hldy uofkgfy lgcdzg xarc vosy spvnrf