Chapter 8

Question 1

Why are flowmeters useful in relay pumping operations?

Answer 1

The driver/operator may feed a supply line without having to know the volume of water flowing from receiving pumper.

Question 2

The condensed Q formula may be used for operations in which the friction loss can be determined for

Answer 2

3, 4, or 5-inch hose.

Question 3

A flowmeter should be accurate to a tolerance of plus or minus

Answer 3

3 percent.

Question 4

The driver/operator must consider that when a standpipe or hoseline is charged, there:

Answer 4

is no flow through the system or hose layout until the nozzle is opened.

Question 5

Which statement about the gpm flowing method is MOST accurate?

Answer 5

It is applicable to both solid and fog streams.

Question 6

Which type of flowmeter has only one simple moving part and tends to require little maintenance?

Answer 6

Spring probe

Question 7

Flowmeters are especially advantageous when automatic nozzles are employed with handlines or master stream devices because automatic nozzles may lead driver/operators to:

Answer 7

supply insufficient discharge pressures, creating a low gallon (liter) per minute flow.

Question 8

Which type of flowmeter uses a sensor to measure the speed at which it spins and translates the information into a flow measurement?

Answer 8

Paddlewheel

Question 9

Each discharge equipped with a flowmeter must have a digital readout display mounted within:

Answer 9

6 inches

Question 10

When a line from a standpipe operation is shut down, the pressure:

Answer 10

must be lowered accordingly, or the standpipe system will attempt to flow excess water through remaining hoselines.

Question 11

Electronic hydraulic calculators may be handheld or may be:

Answer 11

permanently affixed to a location near the pump operator’s pane.

Question 12

Which of the following statements about the flowmeter is MOST accurate?

Answer 12

It relieves you from relying on calculations based on friction loss, elevation pressure, and length of hoseline.

Question 13

Which type of flowmeter is mounted at the top of a straight section of discharge pipe so that only a small portion of the device extends into the waterway?

Answer 13

Paddlewheel

Question 14

Which type of flowmeter employs a stainless steel spring probe to detect water movement in discharge piping?

Answer 14

Spring probe

Question 15

When developing a customized pump chart, column headings should include information such as flow, nozzle pressure, and:

Answer 15

distance in feet for hose layouts.

Question 16

A guideline when developing a customized pump chart is to:

Answer 16

round pump discharge pressure calculations to the nearest 5 psi (35 kPa).

Question 17

Using the condensed Q formula, what is the total pressure loss in 500 feet of 4-inch hose flowing 1,000 gallons per minute?

Answer 17

100 psi  
1,000 / 100 = 10
10 x 10 = 100
100/5 = 20
20 per 100ft
20 x 5 = 100 psi

Question 18

Using the condensed Q formula for 5-inch hose, what is Q&squared; divided by?

Answer 18

15

Question 19

Which of the following statements about pump charts is MOST accurate?

Answer 19

They contain information specific to a jurisdiction’s equipment and common hose layout operations.

Question 20

The gpm flowing method may be used:

Answer 20

for various diameter hose

Question 21

The condensed Q formula FL = Qsquared; is used with:

Answer 21

3-inch hose.

Question 22

Which of the following is MOST likely to be the cause if a driver/operator receives a message from an attack team that the volume of water at the nozzle has suddenly decreased without a corresponding change at the flowmeter?

Answer 22

A hoseline may have burst

Question 23

Flowmeters reflect water pressure that will be discharged through the nozzle:

Answer 23

if the hoseline is functioning at its rated capacity

Question 24

Which of the following statements about electronic hydraulic calculators is MOST accurate?

Answer 24

Once variables have been entered, the calculator applies preprogrammed formulas to arrive at pump discharge pressure.

Question 25

Which of the following is a guideline for initial calculations when developing a customized pump chart?

Answer 25

Include friction loss for master stream appliances.