8 Fireground Hydraulic Calculations

Question 1

Mechanical device installed and a discharge line that senses the amount of water flowing and provides a readout of units of gallons per minute

Answer 1

Flowmeter

Question 2

What is used to ensure proper water flow is made to the line and that pressure errors are not made

Answer 2

Flow meter

Question 3

For every discharge equipped with a flow meter, what else is required

Answer 3

A pressure gauge.

Question 4

Two types of flow meter

Answer 4

Paddle wheel

Spring probe

Question 5

A flow meter also needs what type of read out

Answer 5

Digital display

Question 6

Without knowing the right discharge pressure how would you use a flowmeter to supply water in a relay pump

Answer 6

Throttle up until flowmeter does not increase anymore

Question 7

Apparatus equipped with electronic pressure governors should operate in what mode while serving in any other position but attack during a relay pump

Answer 7

Rpm mode

Question 8

To feed a standpipe with multiple lines, how do you determine pump discharge gallonage with flow meter

Answer 8

Factor elevation loss. Add total gallonage of the lines in operation