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Apparatus questions Flashcards

1
Q

Normal op temp for allison transmissions

A

180-220*

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2
Q

Max tranny temp

A

330* on all rigs except old reserves 300*

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3
Q

Static air brake test should not lose more than ____ psi for engine, truck

A

2 psi engine

3 psi truck

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4
Q

Theoretical lift when drafting

A

33.9’

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5
Q

remaining pressure on intake gauge after opening a discharge gate

A

residual pressure

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6
Q

Applied brake test should not lose more than ___ psi on engine, truck

A

3 psi engine

4 psi truck

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7
Q

Actual lift when drafting at sea level

A

22.5’

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8
Q

Aspect ratio

A

profile of the tire. section height divided by section width and expressed as a percentage

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9
Q

with electronic transfer valve its only necessary to throttle down if PDP exceeds ___ psi, per waterous

A

250 psi

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10
Q

Practical lift when drafting

A

20’

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11
Q

4 cycles of a diesel engine

A

intake (down)
compression (up)
power (down)
exhaust (up)

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12
Q

Per waterous with a manually operated transfer valve, you should slow engine speed to reduce PDP to ____ psi or less. What rigs would this affect?

A

75 psi
4290

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13
Q

If regen is urgent what is sign on dash

A

flashing dpf lamp

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14
Q

Engine compartment belts are allowed up to ____ play at the center of the belt

A

3/4”

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15
Q

what is brake fade

A

brake linings get hot, the glue softens and starts to melt and linings get slick. W/o aut. slack adjustors it could cause them to run out of stroke from heat expanding drums

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16
Q

what needs to be done after using reclaimed water hydrant

A

1 quart bleach poured into tank

clean all fittings with potable water

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17
Q

regen required soon, sign on dash

A

solid dpf lamp

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18
Q

size of helispots at 16A? How many?

A

25’x25’

3

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19
Q

what is at each helispot on 16A

A

reclaimed hydrant with 2- 2 1/2” outlets w/ about 50psi

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20
Q

regen most urgent, sign on dash

A

flashing dpf and check engine light, solid amber warning light

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21
Q

How long do you have to regen if most urgent happens

A

4 hours

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22
Q

what happens if not done in 4 hours

A

soot level rises above level 4
you will get flashing dpf, check engine, stop engine and amber warning light.
Call Robert

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23
Q

pressure on intake gauge prior to opening any discharge gate

A

Static pressure

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24
Q

procedure for towing fire engine

A

towed in neutral 1 mile or less at no more than 30mph

more than 1 mile, disconnect drive shaft or get flat bed

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25
Q

how long are FG-1s kept

A

5 years

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26
Q

NFPA standard for fire apparatus driver/operator professional qualifications

A

1002

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27
Q

What is FG-1

A

daily vehicle inspection form

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28
Q

Net pump pressure

A

difference between residual and PDP, actual work the pump is doing

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29
Q

FG-5

A

Maintenance record form, signed by mechanic when repairs have been completed

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30
Q

valve called for the intake relief valve on the panel

A

pilot valve

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31
Q

maintain what pressure when drafting

A

50 psi

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32
Q

FG-2

A

maintenance request form

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33
Q

NFPA standard for fire apparatus

A

1901

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34
Q

How does spring brake chamber work

A

a spring inside the chamber applies the brake mechanically when pressure is released

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35
Q

what pressure we test 4” hose and how long

A

300 psi 5 minutes

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36
Q

describe color of exhaust, blue, black, white

A

burning oil
running rich
water in combustion chamber

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37
Q

NFPA for aerial ladder and elevating platforms fire apparatus

A

1904

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38
Q

what direction are even street addresses

A

south

east

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39
Q

hose test 3” hose @

A

350 psi 5 minutes

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40
Q

discharge relief valve must be turned off if pumping above what pressure

A

300 psi

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41
Q

Range of discharge relief valve

A

75-300*

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42
Q

hose test 1” booster, 1” brush, 1 1/2” brush @

A

300 psi

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43
Q

minimum tread depth for front tires, rear tires

A

4/32” front, 2/32” rear

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44
Q

hose test 1 3/4”, 2 1/2” including high rise pack @

A

400 psi

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45
Q

Engine idle rpm ’08s

A

700 rpm

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46
Q

Regen rpm

oil pressure

A 
1400 RPM
50 psi (fluctuates quite a bit tho)
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47
Q

What is pre set safety valve psi on wet tank

A

150 psi

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48
Q

What is the engine volts when running?

not running?

A

14-14.3 volts (14.7 is max in perfect scenario, not possible)
12.7 volts (roughly, fluctuates)

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49
Q

If engines running and you notice low voltage what may this indicate

A

alternator problem

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50
Q

When the engine warms up will the oil pressure get higher or lower

A

Lower (oil thins out when it warms up)

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51
Q

Oil pressure at idle on ’08s

A

25-30 psi (depending on engine temp)

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52
Q

3 main components of the pump

A

pump transmission
body assembly
impellar shaft

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53
Q

What on our pumps drive the transmission and impellar shaft? Why do we use this?

A

Chain drive from pump trans to impellar shaft
they have more surface contact and are quieter. 50% of chain in contact at all times.
pump trans oil lubes chain sprocket

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54
Q

Which turbo is high pressure turbo and which is the low on ’08s

A

Top- Low pressure

bottom- High pressure

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55
Q

What does 1500 gpm pump capacity mean

A

is from testing the pump at draft 10’ using a single 6” hose to the steamer connection

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56
Q

What is Friction Loss

examples of different effects on FL

A

Loss of energy in pressure due to resistance as water flows thru hoses, fitting, appliances etc.
Size of hose, length of hose, any bends or kinks, quality of hose itself

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57
Q

define head pressure

A

The vertical distance of the water supply to where its being used. (.434 x height)

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58
Q

what are and how many reservoirs for brake system are there

A

4-on older seagraves
3-on ’08s to present
primary- rears and maxis
secondary-front and aux systems
wet tank (supply tank)- stores a volume of air so its always available
emergency tank- allows rig to be moved when air presure was lost (on older rigs)

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59
Q

adjustment range of intake relief valve?

BFD set at?

A

50-250 psi

200 psi

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60
Q

Explain pump service test

A

pump for 20 mins at 100% rated capacity @ 150 psi net pressure. cant lose more than 13 psi
10 mins @ 70% (1050gpm)rated capacity @200 psi net pressure. cant lose more than 12 psi
10 mins @ 50% (750gpm) rated capacity @ 250 psi net pressure. cant lose more than 11 psi

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61
Q

nfpa for inspection, maintenance, and testing of fire engines

A

nfpa 1911

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62
Q

per DMV: range of low air alarm

A

55-75 psi (bfd 60 psi)

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63
Q

Temp you would open aux engine cooler on ’08s
KME

A

200*
210

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64
Q

per dmv: spring brakes apply at?

A

20-45 psi (bfd 30 psi)

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65
Q

When would you use radiator refill?

A

only emergency situation w/ catastrophic loss of radiator fluid. (hole in radiator etc)
Radio for all crews to back out because of emergency

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66
Q

per dmv: cut out pressure?

cut in pressure?

A

130 psi max (bfd 120psi)

no less than 85 psi

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67
Q

definition of brake chamber

A

air operated cylinders that apply mechanical force to pushrod and slack adjustors

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68
Q

steps for static brake test

A 
Chock wheels
N
Ignition ON
ALL brakes OFF
verbalize starting pressure, 1 min. system should not lose more than 2 psi engine, 3 psi truck
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69
Q

steps for applied brake test

A 
Chock wheels
N
Ignition ON
ALL brakes OFF
step on brake pedal
after initial drop, verbalize tank pressure
hold pedal for 1 minute
pressure should not drop more than 3 psi engine, 4 psi truck
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70
Q

Definition of slack adjustor

A

lever that transmits brake chamber force to the brake assembly. Also takes up slack between brake shoes and drums

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71
Q

Function of intake relief valve

A

safety valve that dumps excess pressure from inlet side of the pump. Helps prevent water hammer
less likely to burst supply line

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72
Q

color of discharge relief valve if valve is closed

A

green

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73
Q

light colors for pressure and volume on old rigs

A

green pressure

orange volume

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74
Q

light colors for pressure and volume on new rigs

A

orange pressure

green volume

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75
Q

color of discharge relief valve if valve is open

A

amber

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76
Q

valve callled that turns on/off discharge relief valve

A

4 way valve

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77
Q

what is stroke of an engine

A

movement of the piston from TDC to BDC

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78
Q

what pressure do we flush all older seagraves at

A

100 psi

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79
Q

what pressure do we pump foam on older seagraves

A

200 psi

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80
Q

Max amount of hard suction you can use on patrol 11

A

24’

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81
Q

Max psi for relay pumping

A

180 psi

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82
Q

2 cycles of the air dryer

A

charge cycle

purge cycle

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83
Q

What psi to pump for relay pumping operation

A

FL + 20 psi

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84
Q

who shuts down first in relay pumping ops

A

attack pumper

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85
Q

what must be coordinated by all engineers before shutting down when relay pumping

A

throttle down simultaneously

86
Q

3 stages of fuel filter/water seperator

A

seperating
coalascing
filtering

87
Q

2 main components of discharge relief valve

A 
Pilot valve (hydraulically controls function of system)
Relief valve (relief valve proper)
88
Q

What is the discharge relief valve

A

spring loaded, pressure actuated safety device that protects the nozzle member and components of the pump from high pressure surges by rerouting water from discharge back to intake side of the pump

89
Q

temp to operate aux engine cooler on all engines except the ’08s

A

190*

90
Q

What makes up electrical system

A

ignition
batteries
alternator

91
Q

retarder shouldnt be used on wet or slippery roads or when trans temp exceeds what temp

A

330*

92
Q

governed rpm on apparatus

A

2100 rpm

93
Q

Power steering system is ____ driven

A

gear

94
Q

What regulates the air pressure in system

A

governor

95
Q

Air compressor is ____ driven

A

gear

96
Q

what gpm does waterous recommend for interior firefight with CAF

A

90 gpm

97
Q

what should foam be set at for interior firefighting

A

.3%

98
Q

for an all risk type fire using CAFS what should you throttle up to on your main discharge guage after engaging the compressor

A

100 psi

99
Q

NP of CAF/flex attack nozzle if flowing just water

A

50 psi

100
Q

suction capacity of vita motivator (gpm)

A

80-120 gpm

101
Q

At ____ feet the usable gpm of vitamotivator is reduced by approximately ____%

A

300’

30%

102
Q

before using vitamotivator your tank should have at least how much water

A

1/4 tank

103
Q

vitamotivator suction lift up to

A

20’

104
Q

discharge head of vitamotivator

A

20-70’

105
Q

what does discharge head mean

A

vertical distance it will pump a liquid

106
Q

inlet pressure of vitamotivator

A

50-125 psi

107
Q

valve on vitamotivator is

A

clapper valve

108
Q

What position should cab tilt valve be in to electrically raise and lower the cab ’08s? Position for normal driving?

A

center

All the way back, away from you

109
Q

max amount of time to prime pump if it wont prime is

A 
45 secs
30 secs (14,16)
110
Q

pump body is made of

A

cast iron

111
Q

transfer valve made of

A

bronze

112
Q

impellars made of

A

bronze, flame plated (added tungsten carbide)

113
Q

impellar shaft made of

A

stainless steel

114
Q

intake screens

A

zinc die cast

115
Q

per waterous, what is size of tank to pump valve

A

3 1/2”

116
Q

per BFD JS, what is size of tank to pump valve

A

3”

117
Q

per waterous, when should you transfer to volume

A

2/3 the pump capacity (about 1000gpm)

118
Q

per bfd js, when should you transfer to volume

A

master stream or
more than 3- 2 1/2” lines (before the 4th line switch over)
2/3 pump capacity per waterous (1000 gpm)
Drafting

119
Q

3 shift indicator lights are furnished to tell you your in pump gear what are they?
what other indicators are there?

A 
pump engaged in cab
ok to pump in cab
Mph gauge 
throttle ready on panel
pdp gauge reading pressure
pump panel light (not as reliable,could be burned out)
120
Q

pump trans holds ___ qts of ____ fluid, ’08s

A

12 qts, ATF

121
Q

which discharges have foam/CAF capabilities ’08s

A 
#3- eng side blue handle
#4- rear stinger black handle
#8- capt side red handle
front bumper orange handle (1 1/2" discharge)
Deck gun gray handle
122
Q

4 main components of advantus 6 foam system

A

OIT (operator interface terminal)
12 volt foam pump
microprocessor controller
foam process manifold

123
Q

what does OIT display

A

flow rate
mix %
total water
total foam

124
Q

how do you lock the display on current position on OIT?

unlock?

A

hold select button for more than 2 seconds

press select again to unlock

125
Q

After ____ seconds the OIT display will return to what position (if unlocked)

A

10 seconds

flow rate

126
Q 
if you press the up and down arrows simultaneously what happens if your display is on
Total water?
total foam?
mix %?
flow rate?
A

resets accumulator back to 0
resets accumulator back to 0
goes back to default mix % (.3%)
it will enter manual mode

127
Q

in manual mode what is default mix %

A

2%

128
Q

up + down arrows will move in what % increments in manual mode

A

.5% increments

129
Q

how to exit manual mode

A

press up + down arrow keys simultaneously

130
Q

manual mode will operate even if no water is flowing T or F

A

True

131
Q

if sEn1 or sEn2 are displayed after pressing foam button you must? How?

A

go into manual mode

press up + down keys simultaneously

132
Q

Advantus 6 means

A

outputs 6 gpm @ 150 psi

133
Q

what is the brain of the foam system

A

microprocessor controller (makes adjustments on the fly from info gathered from 4 sensors)

134
Q

what are the 4 sensors on the foam process manifold and what do they sensor

A

clear water sensor- measures the conductivity of water
paddle wheel flow sensor- current rate of water flow thru the foam process manifold
temperature probe- temp of water in manifold
foam solution sensor- water to foam concentrate ratio

135
Q

what are some things you can do to eliminate the pump from being overheated

A

open discharge to flow water (booster line, hook up hose)
open tank fill to recirculate the water
when pumping feel coupling on intake, you can feel when its heating up

136
Q

what does ECU prevent

A

damage to transmission or powertrain

137
Q

if an incorrect shift occurs what happens

A

check trans light and buzzer come on

ECU locks into gear it was in last; will stay in this gear until engine shut down for at least 10 secs

138
Q

after ECU activates and you shut down for 10 seconds what happens when you start engine again

A

return to N if no damage

if damage or overheated, it will not shift to higher gears. (or it may stay in N until problem is fixed)

139
Q

Top speed in 2nd gear

A

30 mph

140
Q

top speed in 3rd gear

A

45 mph

141
Q

top speed in 4th

A

65 mph

142
Q

top speed in overdrive

A

75 mph

143
Q

describe theory behind positive displacement pump

A

pump will theoretically discharge a given amount of material for every revolution of the pump shaft

144
Q

definition of compression ratio? what does 18:1 ratio mean

A

amount of air and gas compressed in the cylinder before igniting.
air fuel mixture has been compressed to 1/18th its original size before igniting

145
Q

our eductors are rated at what gpm

A

95 gpm

146
Q

eductors rated at what inlet pressure

A

200 psi

147
Q

apparatus inventory shall be done on a _____ basis first ______ of the month

A

quarterly
saturday
(3,6,9,12) march, june, sep, dec

148
Q

air compressor for the CAF system is cooled by

A

tank water (circulates tank water thru compressors oil cooler and back to pump

149
Q

on regen system, what 2 things are collected in diesel particulate filter (DPF)

A

engine oil

soot

150
Q

type of power steering fluid used, 08s

A

dexron III ATF

151
Q

size hose used for ladder pipes and size of coupling

A

3” hose w/ 3” couplings

152
Q

what is passive regeneration for ’08s

A

the engine provides sufficient exhaust gas temperature for regeneration (drive on fwy)

153
Q

what is active regeneration ‘08

A

engine does not provide sufficient exhaust temp for passive regen. Use ARD rocker switch to raise temp of exhaust to provide regen

154
Q

~~~
Max foam solution capability @ 150 psi you get:
___% at 1000 gpm
___% at 600 gpm
____% at 200
____% at 100

A

.5% @ 1000
1% @ 600
3% @ 200
6% @ 100

155
Q

CAFS, the auto sync system will balance the air and water pressure + or - ____% the PDP throughout a range of ___ psi to ___ psi

A

5%

40-150 psi

156
Q

if trans oil reaches ____F, the ECU will not allow the vehicle to shift.
Run in N @ _____ rpm until temp is at least ____F

A

330*
1200-1500 rpm
180-220*

157
Q

type of throttle does 4106/4107 have

A

Vernier throttle

electrically wired to the ECM on cummins engine

158
Q

what can you expect to happen when using vernier throttle?

A

When throttling up or down expect a 2-3 second delay. This is due to ECM performing a self check on engine

159
Q

Make sure throttle is in what position prior to engaging pump on 97s

A

full clockwise position (throttle all the way down)

pump may fail to engage if not

160
Q

what % do you pump class A foam

A

1/4 - 1%

we pump .3%

161
Q

when does high exhaust temp light come on

A

842* exhaust temp

speed of less than 5mph

162
Q

what makes up regeneration system

A

DPF- diesel particulate filter
ARD- after treatment regen device
ECM- electronic control module

163
Q

tank on WT 16 is made of

A

stainless steel

164
Q

what is limit of air ride system for WT16

A

20-100 psi

165
Q

what are in WT16 water tank to prevent damage to tank

A

sacrificial anodes

166
Q

A vehicle with a GVWR of ______ or more is defined as a commercial vehicle

A

26,001 lbs

167
Q

minimum amount of 1 3/4” or 1 1/2” hose for CAF line to perform properly is

A

100’

168
Q

minimum requirements for a Type I ICS pumper

A

1000 gpm pump

400 gallon tank

169
Q

minimum amount of 1” hose for a CAF line to perform properly

A

35’

170
Q

orifice sizes of the elkhart CAF nozzle

A

water- 15/16”
wet- 1 1/8”
dry- 1 3/8”

171
Q

max operating pressure of CAF nozzle

A

200 psi

172
Q

the elkhart flex attack CAF nozzle flows ____ gpm on 1 3/4” CAF line per job sheet.
____ gpm on 1 1/2” CAF line

A

90 gpm

20-30 gpm

173
Q

in the water setting the CAF nozzle will flow ___ gpm at ___ NP

A

150 gpm

50 psi NP

174
Q

temp of exhaust gases and system components can reach up to ____F during regeneration
unexpected failure temps can reach ____F

A

1202*F

1652*F

175
Q

WT 16 is a ___ stage ____ pump w/ a rated capacity of ____ gpm @ ____ rpm @ _____ psi

A 
single
centrifugal
850 gpm
1800 rpm
50 psi
176
Q

WT 16, all pumping operations pump at ____ psi @ ____ rpm

A

50 psi

1800 rpm

177
Q

eductor back pressure must not exceed ___% to ___% of the eductor inlet pressure

A

65 to 70% (130-140 gpm)

178
Q

eductor back pressure is determined by the sum of _______ , _____ and ______

A

elevation pressure
NP
FL

179
Q

Max hose lay with eductor for 1 3/4” hose, class A? B?

A 
350' class A up to 1% foam
250' class B 3-6% foam
180
Q

where is load manager indicator located on new rigs

what does it do? if low what?

A

on dash L of steering wheel, next to ignition, headlight switches etc.
Indicates system is operating and maintaining necessary voltage.
If low voltage, light and beep goes off to indicate also stated on info center display. (12-12.2 volts it comes on) will automatically go into high idle to build up voltage

181
Q

to set relief valve at 190 psi, how many counter clockwise turns from all the way up is it on ’08s, ’97s

A

20 half turns

16 half turns

182
Q

size of orifice on strainer for discharge relief valve

A

.035”

183
Q

which valve places the relief valve in or out of operation

A

4 way valve

184
Q

On auxiliary cooler, which fluid is on the inside of heat exchanger and which is on outside?

A

Coolant flows thru little tubes on inside of heat exchanger and tank water flows on outside of the tubes to exchange heat

185
Q

If radiator refill is used when there is no leak will it blow the radiator cap off?

A

Yes, more than likely it would. But when used for its purpose, a catastrophic leak it will not over pressurize

187
Q

What is order of sensors on foam process manifold including check valve and injector?

A 
Clear water sensor (conductivity probe)
Check valve
Injector
Paddle wheel flow sensor
Foam solution sensor (temp probe is built in to this)
189
Q

What is discharge # of 4” outlet on ’08s?

What is different about the discharge gate?

A 
#7 ( brown handle or plaque)
It has a rotating wheel instead of a pull out gate (gate valve)
190
Q

What is panel called that controls CAFS

A

auto sync control panel

191
Q

3 modes of CAFS

A

Unload
Fixed
Auto

192
Q

In Auto mode for CAF it will do what

A

will match PDP by + or - 5% from 40-150 psi

193
Q

During pre trip, steering wheel play should?

A

Be 2” on a 20” wheel or shouldn’t exceed 10%

194
Q

When brakes are applied the push rod from the brake chamber should not move more than ___” or a little over ____* when brakes are released

A

2”

90*

195
Q

How much hose is carried on ’08s?

A

4525

196
Q

How much hose is carried on ’97s?

A

4100’

197
Q

Before doing a CAF line and you notice pdp is high what’s the problem? What do you need to do before starting?

A

Intake is still open

Close intake and open tank to pump

198
Q

On ’08s, which small hose is the tank water TO the aux cooler? Which is one back to the tank?

A

Hose on Right side hose goes to aux cooler

Left side hose goes back to pump

199
Q

On ’97s, which hose goes TO the aux cooler? Which hose goes back to the tank?

A

Left side hose goes to aux cooler

Right side goes back to pump

200
Q

What is gear ratio for pump transmission on engines?

What does it mean?

A

2.27 ratio

The top sprocket that spins impeller shaft is going 2.27 times faster than pump trans lower sprinkler

201
Q

Type of brake chambers?

How much force do they apply?

A

Type 30 chambers

3600 psi force (120x30)

202
Q

Size of hole on cap of old rigs priming tank?

A

9/64”

203
Q

The tiny hole on elbow of priming tank reservoir does what?

A

Breaks the siphon and stops flow of lubricant after priming

204
Q

How much hose on 4290?

A

5000’

205
Q

How do figure out what the pump rpm is?

A

Engine rpm x 2.27 which is pump trans ratio

206
Q

What are the ways to interrupt the regeneration process?

A

Dpf inhibit switch
Engage the service brake
Release parking brake
Depress throttle pedal
Turn off engine

207
Q

CAFS auto sync will balance the air and water pressure plus or minus 5% throughout a range of?

A

40psi- 150psi

208
Q

What is slug flow?

A

Reaction that happens when there is not enough foam solution present to allow air and water to create bubbles, it will also happen when no foam is present

209
Q

What position is the control valve to electronically raise the cab on 08’s?

A

Neutral position

210
Q

How to properly stop the regeneration process on 08/09 seagraves?

A

Step on the brake pedal

211
Q

How far shall the aerial ladder be off of a ledge

A

6 in

212
Q

When placing OIT in manual mode what is the pre set %?

A

2.0

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