CH7 Flashcards
(13 cards)
Bases on NFPA ____, a pressure gauge must be provided for every discharge outlet equipped with a flowmeter.
1900
pg 262
Mounts at the top of a straight section of the discharge pipe so that only a small portion of the device extends into the waterway.
Paddlewheel
pg 262
This method of placement reduces the impediment to waterflow and lessens the chance of damage from any debris in the pipe.
Paddlewheel
pg 262
As water moves past the ______, a sensor measures the speed at which the water spins and translates the information into a flow measurement.
Paddlewheel
pg 262
Employs a stainless-steel spring probe to detect water movement in the discharge piping. The greater the flow, the more the spring is bent.
Spring probe
pg 262
An electric charge transmits from the spring to a display unit for the D/O to review.
Spring probe
pg 262
With one moving part, the ______ tends to require very little maintence.
spring probe
pg 262
According to NFPA 1900, each discharge equipped with a flowmeter must have a readout display within __ inches of the control valve centerline for that discharge.
6
pg 263
If a pressure gauge is mounted at the 6 inch location, then the flowmeter must be mounted within __ inches, adjacent to the pressure gauge.
2
pg 263
Flowmeters must display flow in increments of ____ GPM or less.
10
pg 263
With proper calibration, a flowmeter in good condition should be accurate to a tolerance of +/- ______%.
5
pg 263
Establishment of an uninterrupted water supply of a minimum of ___GPM for 30 minutes with supply lines maintained by operator.
400
pg 266
Establishment of an effective water flow application rate of ___GPM from two handlines each of which has a minimum flow rate of 100GPM.
300
pg 266
