TENNESSEE COMMISSION FIREFIGHTER II
ON FIREFIGHTING COMPETENCY EVALUATION
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Objective(s): 6-5.4 2002 NFPA 1001 Standard |
Primary Task: MEASURE AND RECORD HYDRANT FLOW PRESSURES |
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Skill No. 6.1 |
Station No. 6 |
MAXIMUM TIME ALLOWABLE: 10 MINUTES |
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INSTRUCTIONS TO THE MONITOR/EVALUATOR 1. Candidate shall be provided a working hydrant with at least two different sized outlets and the following: a) Handheld pitot tube with gage, spanner wrench and hydrant wrench b) Clipboard, hydrant record form and flow sheet for circular outlets * A form will be provided to the candidate. * c) Assistant to record readings 2. The candidate shall be given the instructions below before beginning the exercise. |
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INSTRUCTIONS TO THE CANDIDATE 1. “The candidate, given an assistant and the necessary equipment, shall demonstrate the proper method of determining flow from a hydrant by using a pitot gage, converting the psi reading to gpm and recording the data.” |
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CANDIDATE PERFORMANCE |
YES |
NO |
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1. Controls pedestrian and vehicle traffic, as necessary. |
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2. Determines effects of discharge runoff and controls as necessary. |
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¨ 3. Ensures unused caps are tight. |
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4. Removes cap of discharge to be used. |
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5. Opens hydrant slowly and fully. |
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6. Ensures all water drained from the pitot tube and closes the petcock. |
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7. Positions self to the side of the discharge stream, does not lean over bonnet. |
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8. Firmly grips pitot device near the petcock end of tube or handle. |
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9. Firmly grips the tube near blade. |
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10. Ensures gage is face up, inserts blade at a right angle to the stream. |
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11. Inserts with entry hole of blade facing stream at a distance half the diameter of the outlet size, (ex. 5 inch outlet, hold 2-1/2 inches away). |
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12. Steadies tube by placing side of fist or arm near blade against discharge outlet. |
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13. Records reading on log, splits difference of high and low if needle fluctuates. |
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14. Closes hydrant. Replaces cap and secures. |
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15. Opens tube petcock and drains all water, closes petcock. |
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16. Repeats the procedure on a different sized outlet. |
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17. Using flow table, converts flow readings from psi to gpm and records. |
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Reference: IFSTA Essentials 4th Edition, Chapter 11 Approved by Committee 12/7/04 |
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¨Critical Step - Failure on this step mandates failure on the entire objective! |
Total steps candidate must complete to Pass: |
12 |
TOTALS |
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Test Date______________________________ Location:_____________________________________________ Candidate______________________________________________________SSN_________________________ Evaluation Location___________________________________________________________________________ Evaluator Signature______________________________________________ Date_________________________ |
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* * * SKILL NO. 6.1 CONTINUED ON THE NEXT PAGE * * *
* * * SKILL NO. 6.1 CONTINUED * * *
H Y D R A N T R E C O R D |
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LOCATION___________________________________ HYDRANT NO._________________________________POSITION____________________________________ MAKE_________________________________________INSTALLED___________________TYPE__________ TURNS TO OPEN_________R._________L._________ SIZE OF LEAD________________________________ SIZE OF MAIN_________________________________ VALVE IN LEAD_______________FT.____________ TURNS TO OPEN_________R._________L._________ BENCH MARK________________________________ ELEV.________________________________________ P R E S S U R E T E S T S |
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DATE |
STATIC PRESSURE |
FLOW PRESSURE |
GPM |
DATE |
STATIC PRESSURE |
FLOW PRESSURE |
GPM |
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REMARKS______________________________________________________________________________________________ ______________________________________________________________________________________________ ______________________________________________________________________________________________ ______________________________________________________________________________________________ ______________________________________________________________________________________________ ______________________________________________________________________________________________
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R E C O R D O F M A I N T E N A N C E
WORK PERFORMED________________________________________ DATE_____________________________
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Flowed |
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Lubricated |
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Cap Gasket Replaced |
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Bonnet Gasket Replaced |
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Valve Leather Replaced |
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Drain Valve Repaired |
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Cap Replaced |
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Lead Valve Operated |
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Painted |
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Raised |
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Moved |
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* * * SKILL NO. 6.1
CONTINUED ON THE NEXT PAGE * * *
* * * SKILL NO. 6.1 CONTINUED * * *
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DISCHARGE TABLE FOR CIRCULAR OUTLETS* (U.S.) Outlet Pressure Measured by Pitot Gauge
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Outlet Pressurein lbs. per sq. inch |
OUTLET DIAMETER IN INCHES
2 3/8 2 1/2 2 5/8 2 3/4 2 7/8 3 3 1/8 3 7/8 4 4 3/8 4 1/2 4 5/8 |
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U.S. Gallons per Minute
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1 |
150 |
170 |
180 |
200 |
220 |
240 |
260 |
400 |
430 |
510 |
540 |
580 |
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2 |
210 |
240 |
260 |
290 |
310 |
340 |
370 |
570 |
610 |
720 |
770 |
810 |
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3 |
260 |
290 |
320 |
350 |
380 |
420 |
450 |
700 |
740 |
890 |
940 |
990 |
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4 |
300 |
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