IFSTA 10 Operating Fire Pumps

Question 1

The process for making the fire pump operable begins with what?
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Answer 1

After the apparatus has been properly position in the parking brake has been set

Question 2

on the majority of apparatus the procedure for making the pump operation takes place where
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Answer 2

Before the driver exit to the cab

Question 3

except on the Apparatus used for pump & roll operations, what is the next step after the driver exits the cab
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Answer 3

Chalk the Apparatus wheels

Question 4

The three possible types of water supply for the fire pump, most drivers operate solely from the ——- at the vast majority of incidents
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Answer 4

on board water tank

Question 5

If it appears that a pump will be required to furnish more than ——-percent of his rated capacity it should be set to the parallel (volume) position from the start

Question 6

what is a danger of operating at negative pressure from another pumper
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Answer 6

cause supply hose to collapse resulting in interruption of water supply

Question 7

One possible problem with a Forward lay depends on what

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Answer 7

The distance from hydrant to fire and the length of hose carried on the engine

Question 8

If threaded coupling’s are used in the hose bed. set up for reverse lay should be loaded so that the first coupling come off is what
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Answer 8

male

Question 9

The reverse lay has become a standard method for setting up a —— operation when using medium diameter hose as a supply line
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Answer 9

relay pumping

Question 10

A disadvantage of the reverse lay is what

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Answer 10

fire fighting equipment must be removed and placed at the fire location before the pump I can proceed to the water source

Question 11

when using the percentage method determine how much more water a hydrant can supply first calculate the drop in pressure using what formula
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Answer 11

(static - residual)(100) / static

Question 12

when using the percentage method if the percent decrease of the pump or intake pressure is between zero and 10 how much more additional water is available
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Answer 12

3 additional lines of the same flow

Question 13

when using the percentage method if the percent decrease of the pump and take pressure is between 16 and 25 how much more additional water is available
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Answer 13

One additional line of the same flow

Question 14

when using the first digit method for calculating available water, if the psi drop is equal to or less than the first digit of the static pressure multiplied by one how much more additional water is available
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Answer 14

Three additional lines of the same flow

Question 15

when using the first digit method for calculating available water if the psi drop is equal to or less than the first digit of the static pressure multiplied by two how much more additional water is available
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Answer 15

Two additional lines of the same flow

Question 16

when using squaring the lines method for calculating available water score of the number of lines currently flowing and multiply this by what?
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Answer 16

The original pressure drop

Question 17

what three factors affect the selection of a drafting site

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Answer 17

Type of water
amount of water
accessibility of water

Question 18

what is the most important factor in the choice of a draft site
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Answer 18

Amount of water available

Question 19

Low level strainers are designed to sit directly on the bottom of the tank or pool and are capable of allowing water to be drafted down to the depth of what
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Answer 19

2”

Question 20

below ——- degrees in Fahrenheit or above ——- degrees in Fahrenheit may adversely impact the pumps ability to reach capacity
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Answer 20

35/90

Question 21

pumping —— water can be harmful to the pump

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Answer 21

non potable (untreated)

Question 22

The entire priming action typically requires —— seconds from the start to finish
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Answer 22

10-15

Question 23

Water supply for sprinkler systems is designed to supply —— of the total number of sprinklers on the system
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Answer 23

Only a fraction

Question 24

generally what lines should be used to support standpipe systems
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Answer 24

FD attack lines

Question 25

which of the following is a danger of operating a negative pressure from a fire hydrant
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Answer 25

Increases the possibility of damage to the source pumper due to cavitation

Question 26

what are three methods to move water through the pump in order to prevent overheating
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Answer 26

Circulator
bypass
booster

Question 27

when operating from a pressurized supply source, as the discharge volume from the fire pump increases, the incoming pressure from the supply source will do what?
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Answer 27

Drop due to friction loss in the water system

Question 28

which method of establishing a water supply is the most direct method for supplementing hydrant pressure or performing drafting operations
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Answer 28

Reverse lay

Question 29

What are three methods to determine additional water available from a hydrant?
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Answer 29

Percentage method
first digit method
squaring the lines method

Question 30

define pressure differential

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Answer 30

Effect of altering the atmosphere pressure within a confined space by mechanical means when air is exhausted from within the space a low pressure environment is created as replacement air will be drawn in

Question 31

With an atmospheric pressure at sea level of 14.7 psi what is the partial vacuum read on the intake pressure gauge?
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Answer 31

-2psi or 4” of mercury

Question 32

A pump rated at 750 gallons per minute is normally supplied with 4.5”intake hose to achieve rated capacity. when equipped with a 5 inch intake hose the capacity of the pump is increased to what?
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Answer 32

820 gpm

Question 33

14.7 psi atmospheric pressure is equivalent to what in inches of mercury?
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Answer 33

30”

Question 34

for every 1000 feet of elevation atmospheric pressure decreases approximately how much?
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Answer 34

.5”

Question 35

most pumps are able to develop a vacuum capacity of how many inches of mercury?
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Answer 35

22”

Question 36

NFPA requires pumps are able to meet their capacity during draft at an elevation of what?
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Answer 36

10’

Question 37

A pump are in good working order can lift water at a maximum of how many feet
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Answer 37

25’

Question 38

in order to create an effective fire stream in lift of no greater than how many feet is recommended
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Answer 38

20’

operating at roughly 60%

Question 39

Most priming pumps are intended to work most effectively when the engine is sit at a rate between what?
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Answer 39

1000-1200 rpm

Question 40

The master intake gauge will register vacuum readings that should be equal to 1 inch of mercury per how many feet of lift required
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Answer 40

1’

Question 41

during priming of the pump using 20 feet of intake hose at 10 feet of vertical lift, it may take as long as how many seconds
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Answer 41

30

Question 42

priming a pump with the capacity of 1250 GPM or more may take how long
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Answer 42

45 seconds

Question 43

what is the most common cause of an air leak during priming operations
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Answer 43

An open valve or drain

Question 44

what are the common causes of inability to achieve a prime

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Answer 44

Air leaks
insufficient fluid in priming reservoir engine speed to low
Lyft to high
a High Point an intake hose creating air pocket

Question 45

when supplying a standpipe system do not exceed pump discharge pressure of —— unless the system hose and appliance has have designed to function under high pressures
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Answer 45

185 psi