Pressure Relief Valve/ Foam Pro

Question 1

Pressure relief system works by limiting the maximum discharge pressure by ____ and ____ side of pump.

Answer 1

opening a gate / bypassing water back to inlet

Question 2

The operating range of the pressure relief valve is between ____.

Answer 2

70 and 300 psi.

Question 3

If pressures greater than ___ are required, the relief valve must be OFF

Answer 3

300 psi

Question 4

Always reduce pump pressure using engine throttle ___ turning the relief valve off.

Answer 4

BEFORE

Question 5

When the relief valve is OFF, or out of operation, the relief valve is held closed by ___.

Answer 5

hydraulic force

Question 6

Maintain intake pressure at or above ___ when operating from a pressurized external supply.

Answer 6

20 PSI

Question 7

When operating from draft, always maintain ____ or less. Intake vacuum of more than ___. can cause pump to cavitate.

Answer 7

20 in. Hg. of vacuum

Question 8

Pump cavitation is happening when: Discharge pressure changes ____.

Answer 8

up and down

Question 9

Pump cavitation is happening when: You hear a sound like _____ in the pump.

Answer 9

gravel churning

Question 10

Pump cavitation is happening when: Discharge pressure remains the same when you change____.

Answer 10

engine speed

Question 11

The FoamPro 2001 will power when the pump shift lever is placed in to ____.

Answer 11

Pump mode

Question 12

The foam system is rated at ___ at 3.0% and ___ at 0.5%

Answer 12

85 gpm / 500 gpm

Question 13

Turn Foam Controller ON. The LED lamps below ____ will illuminate. The ____ LED will flash. The current rate of water flow will display in gallons per minute.

Answer 13

ON and FLOW / ON

Question 14

To Stop Pumping Foam and Flush System: Press the ___ button to set the system in standby mode. The foam pump will stop.

Answer 14

red FOAM

Question 15

Priming the Foam System: Turn the CAL/INJECT valve to the ___ position.

Answer 15

CALIBRATE

Question 16

Priming the Foam System: With the pump running, observe ____ from the CAL/INJECT valve to see ____.

Answer 16

the hose / foam flowing from the foam unit.

Question 17

Priming the Foam System:
When foam flows from the unit and can be seen in the hose, the pump is primed. Turn the valve to ____ and you may resume foam operations.

Answer 17

INJECT

Question 18

Mixing of different foam concentrates (either type or manufacturer) may cause _____.

Answer 18

deterioration of the foam concentrate, improper proportioning, and poor performance in a fire situation.

Question 19

Mixing of Class A and Class B foam concentrates may result in a chemical reaction that can create ____, which can clog orifices and cause system failure.

Answer 19

globules