Apparatus questions Flashcards
(210 cards)
1
Q
Normal op temp for allison transmissions
A
180-220*
2
Q
Max tranny temp
A
330* on all rigs except old reserves 300*
3
Q
Static air brake test should not lose more than ____ psi for engine, truck
A
2 psi engine
3 psi truck
4
Q
Theoretical lift when drafting
A
33.9’
5
Q
remaining pressure on intake gauge after opening a discharge gate
A
residual pressure
6
Q
Applied brake test should not lose more than ___ psi on engine, truck
A
3 psi engine
4 psi truck
7
Q
Actual lift when drafting at sea level
A
22.5’
8
Q
Aspect ratio
A
profile of the tire. section height divided by section width and expressed as a percentage
9
Q
with electronic transfer valve its only necessary to throttle down if PDP exceeds ___ psi, per waterous
A
250 psi
10
Q
Practical lift when drafting
A
20’
11
Q
4 cycles of a diesel engine
A
intake (down)
compression (up)
power (down)
exhaust (up)
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
13
Q
If regen is urgent what is sign on dash
A
flashing dpf lamp
14
Q
Engine compartment belts are allowed up to ____ play at the center of the belt
A
3/4”
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
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
17
Q
regen required soon, sign on dash
A
solid dpf lamp
18
Q
size of helispots at 16A? How many?
A
25’x25’
3
19
Q
what is at each helispot on 16A
A
reclaimed hydrant with 2- 2 1/2” outlets w/ about 50psi
20
Q
regen most urgent, sign on dash
A
flashing dpf and check engine light, solid amber warning light
21
Q
How long do you have to regen if most urgent happens
A
4 hours
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
23
Q
pressure on intake gauge prior to opening any discharge gate
A
Static pressure
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
25
how long are FG-1s kept
5 years
26
NFPA standard for fire apparatus driver/operator professional qualifications
1002
27
What is FG-1
daily vehicle inspection form
28
Net pump pressure
difference between residual and PDP, actual work the pump is doing
29
FG-5
Maintenance record form, signed by mechanic when repairs have been completed
30
valve called for the intake relief valve on the panel
pilot valve
31
maintain what pressure when drafting
50 psi
32
FG-2
maintenance request form
33
NFPA standard for fire apparatus
1901
34
How does spring brake chamber work
a spring inside the chamber applies the brake mechanically when pressure is released
35
what pressure we test 4" hose and how long
300 psi 5 minutes
36
describe color of exhaust, blue, black, white
burning oil
running rich
water in combustion chamber
37
NFPA for aerial ladder and elevating platforms fire apparatus
1904
38
what direction are even street addresses
south
| east
39
hose test 3" hose @
350 psi 5 minutes
40
discharge relief valve must be turned off if pumping above what pressure
300 psi
41
Range of discharge relief valve
75-300*
42
hose test 1" booster, 1" brush, 1 1/2" brush @
300 psi
43
minimum tread depth for front tires, rear tires
4/32" front, 2/32" rear
44
hose test 1 3/4", 2 1/2" including high rise pack @
400 psi
45
Engine idle rpm '08s
700 rpm
46
Regen rpm
| oil pressure
```
1400 RPM
50 psi (fluctuates quite a bit tho)
```
47
What is pre set safety valve psi on wet tank
150 psi
48
What is the engine volts when running?
| not running?
14-14.3 volts (14.7 is max in perfect scenario, not possible)
12.7 volts (roughly, fluctuates)
49
If engines running and you notice low voltage what may this indicate
alternator problem
50
When the engine warms up will the oil pressure get higher or lower
Lower (oil thins out when it warms up)
51
Oil pressure at idle on '08s
25-30 psi (depending on engine temp)
52
3 main components of the pump
pump transmission
body assembly
impellar shaft
53
What on our pumps drive the transmission and impellar shaft? Why do we use this?
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
54
Which turbo is high pressure turbo and which is the low on '08s
Top- Low pressure
| bottom- High pressure
55
What does 1500 gpm pump capacity mean
is from testing the pump at draft 10' using a single 6" hose to the steamer connection
56
What is Friction Loss
| examples of different effects on FL
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
57
define head pressure
The vertical distance of the water supply to where its being used. (.434 x height)
58
what are and how many reservoirs for brake system are there
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)
59
adjustment range of intake relief valve?
| BFD set at?
50-250 psi
| 200 psi
60
Explain pump service test
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
61
nfpa for inspection, maintenance, and testing of fire engines
nfpa 1911
62
per DMV: range of low air alarm
55-75 psi (bfd 60 psi)
63
Temp you would open aux engine cooler on '08s
KME
200*
210
64
per dmv: spring brakes apply at?
20-45 psi (bfd 30 psi)
65
When would you use radiator refill?
only emergency situation w/ catastrophic loss of radiator fluid. (hole in radiator etc)
Radio for all crews to back out because of emergency
66
per dmv: cut out pressure?
| cut in pressure?
130 psi max (bfd 120psi)
| no less than 85 psi
67
definition of brake chamber
air operated cylinders that apply mechanical force to pushrod and slack adjustors
68
steps for static brake test
```
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
```
69
steps for applied brake test
```
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
```
70
Definition of slack adjustor
lever that transmits brake chamber force to the brake assembly. Also takes up slack between brake shoes and drums
71
Function of intake relief valve
safety valve that dumps excess pressure from inlet side of the pump. Helps prevent water hammer
less likely to burst supply line
72
color of discharge relief valve if valve is closed
green
73
light colors for pressure and volume on old rigs
green pressure
| orange volume
74
light colors for pressure and volume on new rigs
orange pressure
| green volume
75
color of discharge relief valve if valve is open
amber
76
valve callled that turns on/off discharge relief valve
4 way valve
77
what is stroke of an engine
movement of the piston from TDC to BDC
78
what pressure do we flush all older seagraves at
100 psi
79
what pressure do we pump foam on older seagraves
200 psi
80
Max amount of hard suction you can use on patrol 11
24'
81
Max psi for relay pumping
180 psi
82
2 cycles of the air dryer
charge cycle
| purge cycle
83
What psi to pump for relay pumping operation
FL + 20 psi
84
who shuts down first in relay pumping ops
attack pumper
85
what must be coordinated by all engineers before shutting down when relay pumping
throttle down simultaneously
86
3 stages of fuel filter/water seperator
seperating
coalascing
filtering
87
2 main components of discharge relief valve
```
Pilot valve (hydraulically controls function of system)
Relief valve (relief valve proper)
```
88
What is the discharge relief valve
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
temp to operate aux engine cooler on all engines except the '08s
190*
90
What makes up electrical system
ignition
batteries
alternator
91
retarder shouldnt be used on wet or slippery roads or when trans temp exceeds what temp
330*
92
governed rpm on apparatus
2100 rpm
93
Power steering system is ____ driven
gear
94
What regulates the air pressure in system
governor
95
Air compressor is ____ driven
gear
96
what gpm does waterous recommend for interior firefight with CAF
90 gpm
97
what should foam be set at for interior firefighting
.3%
98
for an all risk type fire using CAFS what should you throttle up to on your main discharge guage after engaging the compressor
100 psi
99
NP of CAF/flex attack nozzle if flowing just water
50 psi
100
suction capacity of vita motivator (gpm)
80-120 gpm
101
At ____ feet the usable gpm of vitamotivator is reduced by approximately ____%
300'
| 30%
102
before using vitamotivator your tank should have at least how much water
1/4 tank
103
vitamotivator suction lift up to
20'
104
discharge head of vitamotivator
20-70'
105
what does discharge head mean
vertical distance it will pump a liquid
106
inlet pressure of vitamotivator
50-125 psi
107
valve on vitamotivator is
clapper valve
108
What position should cab tilt valve be in to electrically raise and lower the cab '08s? Position for normal driving?
center
| All the way back, away from you
109
max amount of time to prime pump if it wont prime is
```
45 secs
30 secs (14,16)
```
110
pump body is made of
cast iron
111
transfer valve made of
bronze
112
impellars made of
bronze, flame plated (added tungsten carbide)
113
impellar shaft made of
stainless steel
114
intake screens
zinc die cast
115
per waterous, what is size of tank to pump valve
3 1/2"
116
per BFD JS, what is size of tank to pump valve
3"
117
per waterous, when should you transfer to volume
2/3 the pump capacity (about 1000gpm)
118
per bfd js, when should you transfer to volume
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
3 shift indicator lights are furnished to tell you your in pump gear what are they?
what other indicators are there?
```
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
pump trans holds ___ qts of ____ fluid, '08s
12 qts, ATF
121
which discharges have foam/CAF capabilities '08s
```
#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
4 main components of advantus 6 foam system
OIT (operator interface terminal)
12 volt foam pump
microprocessor controller
foam process manifold
123
what does OIT display
flow rate
mix %
total water
total foam
124
how do you lock the display on current position on OIT?
| unlock?
hold select button for more than 2 seconds
| press select again to unlock
125
After ____ seconds the OIT display will return to what position (if unlocked)
10 seconds
| flow rate
126
```
if you press the up and down arrows simultaneously what happens if your display is on
Total water?
total foam?
mix %?
flow rate?
```
resets accumulator back to 0
resets accumulator back to 0
goes back to default mix % (.3%)
it will enter manual mode
127
in manual mode what is default mix %
2%
128
up + down arrows will move in what % increments in manual mode
.5% increments
129
how to exit manual mode
press up + down arrow keys simultaneously
130
manual mode will operate even if no water is flowing T or F
True
131
if sEn1 or sEn2 are displayed after pressing foam button you must? How?
go into manual mode
| press up + down keys simultaneously
132
Advantus 6 means
outputs 6 gpm @ 150 psi
133
what is the brain of the foam system
microprocessor controller (makes adjustments on the fly from info gathered from 4 sensors)
134
what are the 4 sensors on the foam process manifold and what do they sensor
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
what are some things you can do to eliminate the pump from being overheated
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
what does ECU prevent
damage to transmission or powertrain
137
if an incorrect shift occurs what happens
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
after ECU activates and you shut down for 10 seconds what happens when you start engine again
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
Top speed in 2nd gear
30 mph
140
top speed in 3rd gear
45 mph
141
top speed in 4th
65 mph
142
top speed in overdrive
75 mph
143
describe theory behind positive displacement pump
pump will theoretically discharge a given amount of material for every revolution of the pump shaft
144
definition of compression ratio? what does 18:1 ratio mean
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
our eductors are rated at what gpm
95 gpm
146
eductors rated at what inlet pressure
200 psi
147
apparatus inventory shall be done on a _____ basis first ______ of the month
quarterly
saturday
(3,6,9,12) march, june, sep, dec
148
air compressor for the CAF system is cooled by
tank water (circulates tank water thru compressors oil cooler and back to pump
149
on regen system, what 2 things are collected in diesel particulate filter (DPF)
engine oil
| soot
150
type of power steering fluid used, 08s
dexron III ATF
151
size hose used for ladder pipes and size of coupling
3" hose w/ 3" couplings
152
what is passive regeneration for '08s
the engine provides sufficient exhaust gas temperature for regeneration (drive on fwy)
153
what is active regeneration '08
engine does not provide sufficient exhaust temp for passive regen. Use ARD rocker switch to raise temp of exhaust to provide regen
154
```
Max foam solution capability @ 150 psi you get:
___% at 1000 gpm
___% at 600 gpm
____% at 200
____% at 100
.5% @ 1000
1% @ 600
3% @ 200
6% @ 100
155
CAFS, the auto sync system will balance the air and water pressure + or - ____% the PDP throughout a range of ___ psi to ___ psi
5%
| 40-150 psi
156
if trans oil reaches ____*F, the ECU will not allow the vehicle to shift.
Run in N @ _____ rpm until temp is at least ____*F
330*
1200-1500 rpm
180-220*
157
type of throttle does 4106/4107 have
Vernier throttle
| electrically wired to the ECM on cummins engine
158
what can you expect to happen when using vernier throttle?
When throttling up or down expect a 2-3 second delay. This is due to ECM performing a self check on engine
159
Make sure throttle is in what position prior to engaging pump on 97s
full clockwise position (throttle all the way down)
| pump may fail to engage if not
160
what % do you pump class A foam
1/4 - 1%
| we pump .3%
161
when does high exhaust temp light come on
842* exhaust temp
| speed of less than 5mph
162
what makes up regeneration system
DPF- diesel particulate filter
ARD- after treatment regen device
ECM- electronic control module
163
tank on WT 16 is made of
stainless steel
164
what is limit of air ride system for WT16
20-100 psi
165
what are in WT16 water tank to prevent damage to tank
sacrificial anodes
166
A vehicle with a GVWR of ______ or more is defined as a commercial vehicle
26,001 lbs
167
minimum amount of 1 3/4" or 1 1/2" hose for CAF line to perform properly is
100'
168
minimum requirements for a Type I ICS pumper
1000 gpm pump
| 400 gallon tank
169
minimum amount of 1" hose for a CAF line to perform properly
35'
170
orifice sizes of the elkhart CAF nozzle
water- 15/16"
wet- 1 1/8"
dry- 1 3/8"
171
max operating pressure of CAF nozzle
200 psi
172
the elkhart flex attack CAF nozzle flows ____ gpm on 1 3/4" CAF line per job sheet.
____ gpm on 1 1/2" CAF line
90 gpm
| 20-30 gpm
173
in the water setting the CAF nozzle will flow ___ gpm at ___ NP
150 gpm
| 50 psi NP
174
temp of exhaust gases and system components can reach up to ____*F during regeneration
unexpected failure temps can reach ____*F
1202*F
| 1652*F
175
WT 16 is a ___ stage ____ pump w/ a rated capacity of ____ gpm @ ____ rpm @ _____ psi
```
single
centrifugal
850 gpm
1800 rpm
50 psi
```
176
WT 16, all pumping operations pump at ____ psi @ ____ rpm
50 psi
| 1800 rpm
177
eductor back pressure must not exceed ___% to ___% of the eductor inlet pressure
65 to 70% (130-140 gpm)
178
eductor back pressure is determined by the sum of _______ , _____ and ______
elevation pressure
NP
FL
179
Max hose lay with eductor for 1 3/4" hose, class A? B?
```
350' class A up to 1% foam
250' class B 3-6% foam
```
180
where is load manager indicator located on new rigs
| what does it do? if low what?
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
to set relief valve at 190 psi, how many counter clockwise turns from all the way up is it on '08s, '97s
20 half turns
| 16 half turns
182
size of orifice on strainer for discharge relief valve
.035"
183
which valve places the relief valve in or out of operation
4 way valve
184
On auxiliary cooler, which fluid is on the inside of heat exchanger and which is on outside?
Coolant flows thru little tubes on inside of heat exchanger and tank water flows on outside of the tubes to exchange heat
185
If radiator refill is used when there is no leak will it blow the radiator cap off?
Yes, more than likely it would. But when used for its purpose, a catastrophic leak it will not over pressurize
187
What is order of sensors on foam process manifold including check valve and injector?
```
Clear water sensor (conductivity probe)
Check valve
Injector
Paddle wheel flow sensor
Foam solution sensor (temp probe is built in to this)
```
189
What is discharge # of 4" outlet on '08s?
| What is different about the discharge gate?
```
#7 ( brown handle or plaque)
It has a rotating wheel instead of a pull out gate (gate valve)
```
190
What is panel called that controls CAFS
auto sync control panel
191
3 modes of CAFS
Unload
Fixed
Auto
192
In Auto mode for CAF it will do what
will match PDP by + or - 5% from 40-150 psi
193
During pre trip, steering wheel play should?
Be 2" on a 20" wheel or shouldn't exceed 10%
194
When brakes are applied the push rod from the brake chamber should not move more than ___" or a little over ____* when brakes are released
2"
| 90*
195
How much hose is carried on '08s?
4525
196
How much hose is carried on '97s?
4100'
197
Before doing a CAF line and you notice pdp is high what's the problem? What do you need to do before starting?
Intake is still open
| Close intake and open tank to pump
198
On '08s, which small hose is the tank water TO the aux cooler? Which is one back to the tank?
Hose on Right side hose goes to aux cooler
| Left side hose goes back to pump
199
On '97s, which hose goes TO the aux cooler? Which hose goes back to the tank?
Left side hose goes to aux cooler
| Right side goes back to pump
200
What is gear ratio for pump transmission on engines?
| What does it mean?
2.27 ratio
| The top sprocket that spins impeller shaft is going 2.27 times faster than pump trans lower sprinkler
201
Type of brake chambers?
| How much force do they apply?
Type 30 chambers
| 3600 psi force (120x30)
202
Size of hole on cap of old rigs priming tank?
9/64"
203
The tiny hole on elbow of priming tank reservoir does what?
Breaks the siphon and stops flow of lubricant after priming
204
How much hose on 4290?
5000'
205
How do figure out what the pump rpm is?
Engine rpm x 2.27 which is pump trans ratio
206
What are the ways to interrupt the regeneration process?
Dpf inhibit switch
Engage the service brake
Release parking brake
Depress throttle pedal
Turn off engine
207
CAFS auto sync will balance the air and water pressure plus or minus 5% throughout a range of?
40psi- 150psi
208
What is slug flow?
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
What position is the control valve to electronically raise the cab on 08’s?
Neutral position
210
How to properly stop the regeneration process on 08/09 seagraves?
Step on the brake pedal
211
How far shall the aerial ladder be off of a ledge
6 in
212
When placing OIT in manual mode what is the pre set %?
2.0
