Ch 8 Pg 281 Flowmeter - Pg 284 Hyd Calc.

Question 1

The driver must use “blank” to determine the appropriate amount of water to be discharged form hose lines and nozzles?

Answer 1

Hydraulic Calculations

Question 2

Flow meter

Answer 2

Mechanical device installed in discharge line that sense flow of water, which reads in GPM

Question 3

What reduces the number of pressure calculations required of driver?

Answer 3

Flowmeters

Question 4

How do flowmeters measure and display water flow?

Answer 4

In general

Question 5

When using automatic nozzles with hand lines and/or master stream devices it is advantageous for driver to “blank” and “blank” determine the flow.

Answer 5

Quickly and accurately

Question 6

The flowmeters relieve you from relying on calculations based on what three areas?

Answer 6

Friction loss, evaluation pressure, and length of hoseline.

Question 7

Based on NFPA 1901, every discharge equipped with a flowmeter shall also have what?

Answer 7

A pressure gauge

Question 8

Based on NFPA 1901, flowmeters must display flow in increments of ?

Answer 8

10 GPM or less.

Question 9

What are the two types of flowmeters?

Answer 9

Paddlewheel

Spring probe

Question 10

What is a paddlewheel flowmeter?

Answer 10

A small device that extends into the waterway.

Question 11

Paddlewheel flowmeters reduce what?

Answer 11

Reduces the impediment to water flow and lessens the chance of damage by debris

Question 12

What is a spring probe flowmeter?

Answer 12

Stainless steel probe detected by pressure on a spring. The greater the flow the more the spring bends. One simple moving part, requires little maintenance.

Question 13

A flowmeter is good working order should be accurate within how many percent?

Answer 13

Plus or minus 3 %, in other words, based on 100gpm, display should Ben impress or less than 3 gallons.

Question 14

each discharged equipped with a flowmeter must have a digital readout display mounted with in how many inches of the control valve for that discharge

Answer 14

6inches

Question 15

If there is a pressure gauge mounted at the 6 inch location, then the flowmeter must be mounted with in how many inches adjacent to the pressure gauge?

Answer 15

2 inches

Question 16

What additional information do monitoring devices offer?

Answer 16

• Flow from any specific discharge
• Total “real time” water flow through the pump
• total water flowed through the pump for the duration of the incident
• amount of foam being flowed

Question 17

The driver may use flowmeters to identify what?

Answer 17

Water flow issues such as kinks, partially closed valves, and burst lines. All show decreases in pressure

Question 18

Intake pressure should not be allowed to drop below what PSI

Answer 18

20 psi

Question 19

With the exception of attack pumpers, What should pumps with electronic pressure governors involved in relay pumping operate in?

Answer 19

RPM

Question 20

Standpipes: when equipped with flowmeters, the number and types of nozzles on lines operating on a standpipes you can be factored by?

Answer 20

Adding the flow rate for each nozzle together and pumping the volume that matches that rate.

Question 21

When operations on a standpipe, the driver must monitor the status of each line to determine what?

Answer 21

Which attach lines are flowing

Question 22

During standpipe operations, when a line is shut down, what must you do?

Answer 22

Lower the pressure accordingly, or the standpipe system will try to flow excess through the remaining hose lines.

Question 23

True or false, the pressure governor in RPM mode with compensate for a shut down line, when multiple lines are in use during standpipe ops?

Answer 23

False, RPM mode will not automatically compensate for reduced flow, but PSI mode will.

Question 24

Drivers must consider what when a hose line or standpipe is charged?

Answer 24

That there is no flow through the system until until you open the nozzle

Question 25

Drivers must rely on what three things to set pressures that are relatively close to what is required for water discharge?

Answer 25

Experience, training, and operating guidelines