5. The Fire Pump

Question 1

A centrifugal pump is capable of only pumping ___

Answer 1

Fluids

Question 2

The fire pump must be capable of delivering a minimum capacity of 250 to 3000 gpm at ___ psi

Answer 2

150

+3000 gpm at 100 psi

Question 3

Pump and roll

20 gpm at a gauge pressure of 80 psi while the apparatus is moving at a speed of __ mph

Answer 3

2mph

Question 4

100% of the rated capacity at ___ psi with a net pump pressure from draft through ___ feet of suction hose with a strainer at an atmosphere of 1000 feet above sea level

Answer 4

150 psi

20 ft

Question 5

All water tanks should be equipped with a baffling system with a minimum of two transverse or longitudinal vertical baffles that cover at least ___% of the area of the plane that contains the baffle

Answer 5

75%

Question 6

___ Pump is in ideal choice for use as a priming pump for centrifugal pumps

Answer 6

Positive displacement

Specific volume of fluid per pump revolution

Question 7

___ pump are typically used as the priming pump for a centrifugal pump

Type of positive displacement pump

Answer 7

Rotary

Question 8

pump most commonly used today is the ___ pump

Answer 8

Centrifugal

Question 9

The most common type of multi stage pump is the __ pump

Answer 9

Two stage pump

Question 10

At the discharge side of the first impeller, a ___ valve directs the water to either the pumps discharge header or the intake side of the second impeller

Answer 10

Transfer

Question 11

The two broad Classifications of positive displacement pumps for firefighting purpose are

Answer 11

Piston pump

Rotary pump

Question 12

Pump intake gpm

Tank < 500 gallons

Tank > 500 gallons

Answer 12

250 gpm

500 gpm

Question 13

The tank to pump piping also contains a ___ valve which allows water to flow only from the tank into the pump, and not back inside the tank

Answer 13

Check

Question 14

Each intake valve that has a connection larger than 3 inches must be equipped with an adjustable ___ ___ ___ ___ ___

Answer 14

Automatic intake pressure relief device

90-185 psi

Question 15

Each intake valve must be equipped with a ___ valve to remove any air trapped in the house before it enters the centrifugal fire pump

Answer 15

Bleeder

Question 16

Master “pump intake” pressure gauge must be capable of reading ___ inch Hg vacuum to at least a gauge pressure of ___ psi

Answer 16

30

300

Question 17

The master pump discharge gauge must be located within __ inches of the master pump intake gauge

Answer 17

8 inches

Question 18

“Pump discharge” must be at least __ inch larger then all other discharges.

Answer 18

1 inch

Question 19

Digital master pressure gauges must have

Answer 19

+|- 3% accuracy over the full scale

0.5 inch

Increments of not more then 10 psi

Question 20

Pressure governor

The system must automatically control the pump pressure to a maximum of __ psi pressure rise no faster than ___ seconds and no slower than ___ seconds from the time the pressure surge is detected

Answer 20

30

3

10

Question 21

The most common type of power system found in pumps is the ___ ___

Answer 21

Transfer case