AOTM

Question 1

atmospheric pressure

Answer 1

14.7 psi at sea level

Question 2

What is the three phase maintenance program consist of

Answer 2

1. Preventive maintenance
2. Periodic maintenance
3. Inspection tests

Question 3

Preventive maintenance includes

Answer 3

1. keeping equipment clean
2. tightening leaky joints
3. replacing hose gaskets as necessary
4. Listening for unusual noises and watching for anything unusual in pump operation
5. Performing the steps listed after pumping

Question 4

When using the pump in cold weather, run it at least __ minutes to warm up gear case and drive out moisture that can damage internal parts

Answer 4

20 minutes

Question 5

Double jacket hose allows higher working pressure

Cords running around the hose are called

Answer 5

woof

Question 6

Cords of hose running lengthwise are called

Answer 6

warp

Question 7

what material used for woof cords

Answer 7

dacron

Question 8

What material used for warp cords

Answer 8

cotton

Question 9

old lafd identification hose strip

Answer 9

2 black, 4 white, 2 red, 4 white and 2 black

Question 10

hose working test pressure

Answer 10

600 psi

Question 11

hose burst test pressure

Answer 11

900 psi

Question 12

hose beds should be reloaded at least once each __ days to change the folds and prevent kinks which may damage the linear of the hose

Answer 12

30

Question 13

dirty hose washed w/

Answer 13

cold, clear water only
no other agent used except with permission of the storeroom

Question 14

damp hose shall not remain on apparatus longer than

Answer 14

24 hours

Question 15

purpose of 4 way valve

Answer 15

change from direct hydrant pressure to pump pressure w/o shutting off the flow of water

Question 16

static pressure

Answer 16

water w/o motion or standing still

Question 17

what makes a good fire stream

Answer 17

reaches seat and pass 9/10 of its volume of water inside a 15” circle and

3/4 of it inside a 10” circle

Question 18

fire stream greatest horizontal range when angle is

Answer 18

30 degree

Question 19

Greatest vertical range when angle is

Answer 19

75 degree

Question 20

momentary nozzle reaction when the nozzle is first opened is __ % greater than the reaction after the water is flowing

Answer 20

20%

Question 21

when flow of water in a hose line suddenly stops

Answer 21

water hammer

Question 22

When a pump is connected to a hydrant, it is desirable to maintain at least __ to __ pounds pressure on the intake (compound) gage

Answer 22

5 to 10 psi

Question 23

what does a soft and flabby suction indicate

Answer 23

maximum flow for the hydrant has been reached

pump is beginning to run away from the water

Question 24

what is the condition where vapor cavities are formed in the pump and can cause serious damage

Answer 24

cavitation

Question 25

operation runs pump faster than suction hose can deliver water to pump when drafting results in

Answer 25

cavitation

Question 26

Pump operator supplying a ladder pipe should pump __ to __ psi above the required operating pressure after filling the lines laid to the base of the ladder

Answer 26

25-40 psi *insures against an excessive pressure drop when ladder pipe nozzle is first opened

Question 27

what is the difference in elevation between the water level and the center of the pump when a pumper is drafting water

Answer 27

Lift

Question 28

At sea level the atmospheric pressure is 14.7 psi. This pressure is capable of sustaining a column of water 33.9 feet in height. This is arrived by multiplying 14.7 pounds by 2.304, the height of water which will exert 1 pound pressure. If a pump could produce perfect vacuum, the max height it could lift water at sea level is __ ft

Answer 28

33.9 feet

Question 29

Taking into consideration the inability to create a perfect vacuum, the effect of minute air leakage and the frictional resistance through the suction hose, the common practice is to use two-thirds of the theoretical distance, or 22-2/3 feet at sea level for the practical limit of draft

Answer 29

reference

Question 30

Atmospheric pressure is reduced ___ pound for each 1000 feet of elevation above sea level.

Answer 30

one-half

Question 31

When drafting suction strainer will be submerged at least __ feet below the sea level of the water

Answer 31

2'

Question 32

When drafting water should be at least __ feet deep where the strainer is located to provide clearance below and sufficient depth above it

Answer 32

4'

Question 33

Pumps are rated at cap acting using a __ inch suction and a lift of 10 feet

Answer 33

6"

Question 34

rotary gear and rotary vane pumps are vacuum producing units. They are positive displacements pumps capable of displacing __ and __ at the same time

Answer 34

air and water

Question 35

Centrifugal pumps are not capable of creating a vacuum due to the fact that __ can leak through the pump

Answer 35

air *in order for centrifugal pumps to be used at draft, priming pumps must be utilized

Question 36

During temporary shutdown of draft maintain __ psi discharge pressure to avoid losing prime

Answer 36

35 psi

Question 37

considerations when setting up for a relay

Answer 37

1. Topography 2. Time necessary to set up 3. Total amount (gpm) of water estimated to be necessary at the point of ultimate consumption 4. Size and length of hose necessary to carry the amount of water needed 5. Apparatus available to do the pumping

Question 38

relay operation: necessary to keep individual pumps in a line to a __ pound maximum

Answer 38

200

Question 39

Priming vacuum max should be at least __ inches of mercury

Answer 39

20

Question 40

Drafting; do not attempt lifts exceeding __ feet except at low altitudes and with equipment in new condition

Answer 40

22

Question 41

water over what temp is too hot for drafting

Answer 41

over 85F

Question 42

downtown area curbs are approx. ___ feet from the building line

Answer 42

11 feet

Question 43

where spotting made next to curb operating aerial between 5th and 8th floors maintain a climbing angle of

Answer 43

70-80 degrees

Question 44

When spotting is made outside line of cars, any operation below the 7th floor will conduct at a climbing angle less than __ degrees

Answer 44

70 degrees

Question 45

if uphill throw aerial

Answer 45

stop short of intended spot and raise aerial *more stable ladder and rung tilt reduced

Question 46

if headed downhill throw aerial

Answer 46

spot past where the intended throw

Question 47

best to have aerial hoisted at least __ degrees before operating other controls

Answer 47

45

Question 48

extreme caution when operating aerial in winds as fast as

Answer 48

35 mph and over

Question 49

safe driving is made up of

Answer 49

20% safe vehicle 20% good physical condition of driver 60% good attitude

Question 50

perception and reaction time

Answer 50

3/4 second each

Question 51

smith system: get big picture ___ mile ahead when on rural roads

Answer 51

1/2 mile

Question 52

air brake equipment

Answer 52

perception/reaction distance + brake lag + effective breaking distance= total stopping distance

Question 53

descending grade with constant brake application of approx __ psi

Answer 53

10

Question 54

brake lag distance

Answer 54

.4 (four tenths of a second)

Question 55

do not idle diesel engine in excess of __ minutes

Answer 55

30 minutes