Vol X 1012.10B Pumping Ops

Question 1

What are two basic pumps used by FD ?

Answer 1

What are two basic pumps used by FD Positive displacement pump and centrifugal pump

Question 2

Describe a positive displacement pump

Answer 2

Positive displacement pumps move a given amount of water or air through a pump chamber with each stroke or rotation

Question 3

Two kinds of positive displacement pumps

Answer 3

Rotary gear and rotary vane

Question 4

Describe centrifugal pump

Answer 4

In theory the operator of a centrifugal pump is based on the principle that when water is introduced at the center of the rapidly revolving disc it will tend to throw the water to the outer edge of the disc centrifugal pumps do not pump air

Question 5

What type of centrifugal pumps are there? (2)

Answer 5

There are single stage and two stage centrifugal pumps

Question 6

Describe Series/pressure operation

Answer 6

Series/pressure operation the pump will theoretically be able to discharge twice the pressure but only half the rated capacity of the pump

Question 7

Describe parallel/volume operation

Answer 7

In parallel/volume operation the pump will theoretically be able to discharge the rating capacity of the pump but only have the rated pressure

Question 8

What does the transfer valve determine?

Answer 8

The transfer valve determines series or parallel operation

Question 9

what position should transfer valve be placed in?

Answer 9

Transfer valve should be placed in the position most likely to be used at the next fire which is pressure

Question 10

When can transfer valve can be safely operated?

Answer 10

Transfer valve should be placed in the position most likely to be used at the next fire which is pressure to change from series to parallel pump must be slowed until there is not over 30 psi pump pressure and then transfer valve can be safely operated

Question 11

When is Slippage is automatically allowed?

Answer 11

Slippage is automatically allowed when one discharge line or gate is shut down

Question 12

If discharged gate is not open or other cooling procedures are in place what will happen?

Answer 12

pumps will heat up very rapidly and or cavitate or caused damage during opperation unless discharged gate is open or other cooling procedures are in place

Question 13

What is cavitation?

Answer 13

cavitation is a condition in which air cavities are formed in the pump resulting in vibrations and loss of efficiency and possible damage to the pump

Question 14

Cavitation is AKA ?

Answer 14

A.k.a. described as the pump running away from the water an indication of cavitation could be increase rpm’s without increased pressure

Question 15

How can cavitation be eliminated?

Answer 15

Cavitation may be eliminated by a reduction water flow or slowing engine RPM to 1000 and priming pump until discharge

Question 16

Two reasons Cavitation can take place when pumping from a hydrant?

Answer 16

Two reasons Cavitation can take place when pumping from a hydrant 1 . pumping more water than the hydrant can supply 2 . using too small and intake

Question 17

What is the purpose of pressure control devices?

Answer 17

The purpose of pressure control devices is to protect personnel from dangerous pressurized second is to protect hose and pumps

Question 18

Automatic pressure control device also known as?

Answer 18

Automatic pressure control device also known as relief valve

Question 19

Electronic pressure control governor operate independently from ___________ and regulate pump pressures by controlling _________

Answer 19

Electronic pressure control governor operate independently from relief valve and regulate pump pressures by controlling rpm’s

Question 20

Set pressure control device prior______________ and at least ________________ going into operation

Answer 20

Set pressure control device prior to second line and at least no later than the second line going into operation

Question 21

Most critical Gages are ? (5)

Answer 21

Most critical Gages are pressure, engine temperature, rpm’s, engine pressure

Question 22

What panel gauges should be compared to apparatus? (3)

Answer 22

Compare apparatus gauges to pump panel prior to shut down , temperature air rpm fuel

Question 23

Do not exceed______ mph when laying supply line

Answer 23

Do not exceed 15 mph when laying supply line

Question 24

When laying supply line remeber to_____________ for other companies

Answer 24

Remember to allow access for other companies

Question 25

When operating as a forward pumper consider four things

Answer 25

When operating as a forward pumper consider four things

Apparatus placement fire conditions volume of water residual pressures

Question 26

Never pump any supply line at _____ psi or higher

Answer 26

When operating key/supply pumper consider
Hydrant capability for pumper supply line being operated… Never pump any supply line at 1:50 psi or higher consistent pressure on changing for condition

Question 27

The following are advantages of_______________

more water available, initiates building attack teams, simplizes changing from offense to defense, better pressure control, minimize congestion

Answer 27

Advantages of forward/supply pumper operations
more water available, initiates building attack teams, simplizes changing from offense to defense, better pressure control, minimize congestion

Question 28

What are Two major troubleshooting issues?

Answer 28

Two major troubleshooting hot engine hot pump

Question 29

During pumping and driving engine temperature should be ______ to ____°

Answer 29

During pumping and driving engine temperature 160 to 190°

Question 30

Ways to cool engine? (3)

Answer 30

Fog spray hose line under front of truck, open engine cowlings for additional airflow,
Spray water directly onto radiator

Question 31

What is the Built in factory assist?

Answer 31

Built in factory assist …indirect cooling where water flows from fire pump to heat exchangers at bottom of the engine radiator removing from coolant

Question 32

Direct cooling… it’s disconnected

PFD/unsure GFD?

Answer 32

Direct cooling… it’s disconnected

Question 33

If pump is not cooled firefighters could be ______ and the pump _____ or ________

Answer 33

If pump is not cooled firefighters could be burned and the pump damage or cavitated

Question 34

Ways to cool pump (4)

Answer 34

by operating nozzle of charge line, open discharge gate, open redline and return it back to tank water on a fog, hooking up to supply line run in freshwater to pump

Question 35

If the pump _______________ you should check for air leaks. no oil and priming tank.defective priming valve, engine speed to low during priming, priming home not operated long enough, tank to pump though closed no water in palm

Answer 35

If the pump is not prime you should check for air leaks. no oil and priming tank.defective priming valve, engine speed to low during priming, priming home not operated long enough, tank to pump though closed no water in palm

Question 36

Check the following if _______________ occurs.

discharge gate closed, pump speed to low, transfer valve said improperly, governor sent him properly, relief valves improperly, pump capacity limits pump pressure, improper holes evolution

Answer 36

Insufficient or no pump pressure you should check discharge gate closed, pump speed to low, transfer valve said improperly, governor sent him properly, relief valves improperly, pump capacity limits pump pressure, improper holes evolution