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Engineer > DMV / Engine > Flashcards

DMV / Engine Flashcards

1
Q

Static air leakage test

A

fully charged, engine off, all brakes released, pressure loss not >2psi in 1 min

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2
Q

Applied air leakage test

A

fully charged, engine off, service brakes applied, pressure loss not >3psi in 1 min

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3
Q

Low air warning

A

60

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4
Q

Compressor cut in

A

85

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5
Q

Compressor cut out

A

120-130

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6
Q

Rate of build up for Air Brakes

A

engine at normal operating Rpm, (600) pressure should build from 85-100 psi in 45 sec, 90psi in 3 min, 120psi in 5 min

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7
Q

Maxi brake test

A

25-40

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8
Q

Roll out test

A

engine should stop within 20 feet when parking brake is pulled during a 5mph roll

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9
Q

Engine temperature

A

190-210 (195 or what thermostat is set at)

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10
Q

Engine RPM’s

A

600 rpm

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11
Q

Engine Oil pressure

A

40-50 psi

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12
Q

Voltmeter readings

A

13.8-14.2 when engine is running, 12 not running

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13
Q

Transmission temperature

A

keep at approx 200 – if it is approaching 250, its overheating

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14
Q

Steering wheel play

A

– shouldn’t exceed 10degrees on a 20” wheel – about 2 inches of play

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15
Q

Tires Inflation – Condition – Depth – Size and type

A

Inflation – 120 on front 115 on rear or per sidewall specifications
Depth – 4/32 front and 2/32 on rear
Size and type – 385/12R22.5
Condition – no recaps on front and no mismatched tires

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16
Q

Lights – visible low beams and high beams

A

Visible low beams – 250’

High beams – 350’-500’

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17
Q

Brake shoes and pads

A

Disk pads pierce – 1/8”
Drum shoes pierce – 1/4”
Drum shoes brush engine front and rear – 3/16”

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18
Q

Brake cans

A

Brush engines front – 16”
Brush engines rear – 30”
Pierce front and rear – 30”

Slack adjuster stroke
Brush engines front – 13/4”
Brush engines rear – 2”
Pierce front and rear – 2”

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19
Q

Engine pressure formula

A

EP= NP + Appliance + or – back pressure + FL

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20
Q

Nozzle reaction formula

A

1.5 x Diameter squared x nozzle pressure

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21
Q

Momentary nozzle reaction

A

1.8 x D2 x pressure

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22
Q

Nozzle reaction of fog nozzle

A

½ gpm

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23
Q

GPM discharge formula

A

29.7 x Diameter squared x square root of the pressure.

Field formula: 30 x D2 x square root of the pressure

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24
Q

Discharge GPM From hydrant or open butt

A

30 x D2 x square root of the pressure x .9

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25
Q

Friction Loss

A

> 100 gpm – 2Q2 + Q

<100gpm = 2Q2 +1/2Q

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26
Q

Back pressure

A

Psi per foot - .434 x height in feet
Fire ground
Psi per foot – ½ psi
Psi per floor – 5 starting at floor above first floor

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27
Q

Intake pressure –

In relay pumping ops min engine pressure

A

10psi + FL

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28
Q

Friction Loss in:

Monitor
Standpipe
Small appliances
Disabled engines
Wildland tees
A 
15
25
10
25
5
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29
Q

Automatic sprinkler connections:

Initial pressure =
Max pressure =

A

Initial 150

Max 200

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30
Q

High Rise PSI and GPM

1 3/4

2 1/2

2 1/2 breakaway smooth bore

A

75 psi 150 GPM

100 psi 250 GPM

50 psi 160 GPM

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31
Q

set relief valve or pressure governor when:

A

pumping 2 or more hand lines

or

pumping a master stream

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32
Q

Class A Foam

Suppression

Overhaul

Pretreat

A
  1. 2 %
  2. 1-0.2 %
  3. 5-1 %
33
Q

Ladderpipe tips GPM and total PSI (nozzle, appliance, 3” supply, platform appliance or gated y) :

1 1/4
1 3/8
1 1/2
1 5/8
1 3/4
1 7/8
2
A 
400 GPM 115 PSI
500 GPM 120 PSI
600 GPM 126 PSI
700 GPM 133 PSI
800 GPM 141 PSI
900 GPM 150 PSI
1000 GPM 160 PSI
34
Q

Smooth Bore Tips- handline

1
1 1/4
1 3/8

A

200
250
325

35
Q

Wildland

150’ of 11/2” with 1 tee and 50 feet of elevation

A

184

36
Q

400’ of 11/2” with 2 tee’s and 40 feet of elevation down

A

134

37
Q

Relay pumping

One engine is pumping 2 13/4” lines at 125gpm each. They are 200’ away

A

?

38
Q

Relay Pumping

One engine is pumping a monitor with a 13/8” tip portable. They are 500’ away

A

?

39
Q

21/2” with the high rise pack

100
150
200
250
300
A 
112
115
118
121
124
40
Q

Standpipe

Pump to the 5th floor with 400’ of 4” supply using the high rise pack

A

161

41
Q

Pump to the 6th floor with 200’ of 4” supply using the high rise pack

A

168

42
Q

Pump to the 8th floor with 300’ of 4” supply using the high rise pack

A

179

43
Q

Pump to the 4th floor using 100’ of 21/2” with a 1” tip and 300’ of 4” supply

A

118

44
Q

Pump to the 5th floor using 200’ of 21/2” with a 11/8” tip and 400’ of supply

A

137

45
Q

Pump to the 6th floor using 50’ of 21/2 extended with the high rise pack and 500’ of 4’ supply

A

164

46
Q

Ladder Pipe

11/2’ tip 60’ feet high with 400’ of 4” supply

A

180

47
Q

113/4” tip 50’ feet high with 500’ feet of 4” supply

A

216

48
Q

2” tip 70’ feet high with 600’ of 4”

A

285

49
Q

13/8” tip 40’ high with 400’ of 4”

A

158.5

50
Q

13/8” tip 40’ high with 400’ of 4”

A

170.5

51
Q

17/8” tip 50 feet high with 200’ of supply

A

200

52
Q

Portable Monitor

200 feet of 4” with 13/4” tip

A

115

53
Q

300 feet of 4” with 11/2” tip

A

103

54
Q

300 feet of 4” with 2” tip

A

135

55
Q

200 feet of 4” with a 13/8” tip

A

108.5

56
Q

250’ of 4” with 17/8” tip

A

126.5

57
Q

300’ of 4” with 15/8” tip

A

119

58
Q

PUC fuel tank

A

75 gallons

59
Q

PUC water tank

A

500 gallons
4” overlfow
poly water tank

60
Q

PUC front axle

A

OshKosh TAK-4
twin torsion
19,500 lbs

61
Q

PUC rear axle

A

Meritor RS24-160
24,000 lbs
Spring-Leaf springs

62
Q

PUC cab lift

A
  • Electric over hydraulic
  • Remote or fixed panel
  • Manual override
63
Q

Batteries

A
  • 6 Deka Group 31
  • Single Start Battery System
  • AXT Battery Compartment
  • remote jump start
  • You can access the Batteries from inside the cab
64
Q

PUC Dual pro charger

A
  • Single system
  • Dual Bank
  • Remote charge indicator
  • Individual amperage per bank
65
Q

PUC load manager

A
  • Kussmaul Mark 1

- 7 Channels

66
Q

PUC scene lights

A
  • Magnafire 70W 12V
  • One on each side on the rear of the cab
  • Switch locations
    • Center Consol in cab
    • Engineer Panel
67
Q

PUC pump

A
  • High speed single stage centrifugal fire pump
  • Compact, lightweight
  • Midship mounted
  • Powered via rear engine PTO
  • 9 Disk Clutch Pack
  • Electromagnetic clutch switch
  • Pump gear box oil level dipstick and fill port
  • Oil drain plug underneath gear box
68
Q

PUC pump seals

A
  • Provides service free operations for extended periods
  • Addresses any seal failures immediately
  • Damage may result if operated with damaged or dry seals
  • Avoid operations above pump rating
69
Q

PUC off side 2 1/2 and 4” manual socket size and location

A

???

70
Q

PUC pump and roll

A
  • pull front bumper
  • pull tank to pump
  • push water pump switch to engage pump
  • disengage parking brake
  • push pump and roll switch for 2 seconds
  • put transmission into drive
  • should read 1-1 on selector
  • if it reads 6-1 = you are not in pump and roll mode
    • it will still allow you to pump and roll
    • as a safety, it will disengage pump if the transmission shifts out of first gear
  • there is no pressure governor for pump and roll
  • exercise caution when applying throttle during pump and roll operations
  • excessive pressures can be delivered to hoseman
  • adequate pressures can be delivered @ idle or slightly above (45-50psi)
  • a light foot may be used to adjust needed nozzle pressure
71
Q

PUC foam pro

A
  • Single agent
  • 3 discharges – 1 flow to all discharges – passenger and driver side manifold and front bumper
  • 30 gallon Poly Plastic Tank
    • Circuit breaker
    • Simulated flow
    • Foam valve
72
Q

PUC Caterpillar C-13 powerplant

A
  • 12.5 Liter
    • 762.5 cubic inches
    • 485 Horsepower
    • 1650 ft/lbs of torque
    • 5” vertical exhaust
    • Horton fan clutch
    • oil and fan dipstick access in the cab
    • red = transmission fluid
    • auxiliary coolant reservoir
    • radiator level
73
Q

PUC DPF (diesel particulate filter)

A 
Active – 
In either stationary or PTO mode
Stationary – 
	- dpf lamp on
 	- parking break set
	- engine at idle
	- hold momentary switch for 2 seconds
	- ard will turn itself off when complete
	- all warnings should reset

PTO

- dpf lamp illuminated 
- parking break set
- PTO engaged 
- locate momentary switch/hold for 2 seconds
74
Q

Allison Gen 4 4000 EVS P

A
  • 6 speed
  • push button controlled
  • no retarder
  • auxiliary cooler through heat exchanger
75
Q

PUC Meritor EX225 air disk brakes

A
  • internal adjustment mechanism
    • monitors and maintains optimum pad-to-rotor clearance and is sealed from the environment
  • actuation seal
    • reduces ingestion of corrosives and water into the braking system
  • rear disk and spring break
  • disc rear single axle 17”
  • WABCO abs modulator
  • secondary oil fill
  • Air dryer – WABCO system server 1200
  • Air inlet with disconnect coupling
  • 400 amp Niehoff alternator
  • 16.5 CFM cat compressor
76
Q

PUC- when not to pump from same manifold

A
  • pumping multiple 13/4” lines and there could be >30psi variance
  • pumping different diameter lines
  • pumping different nozzle types ie SM20 and High rise nozzle
77
Q

Reasons to take Apparatus OOS.

A

Scheduled Maintenance
Mechanical Failure
Accidents
Lack of staffing

78
Q

Apparatus OOS categories (2 levels)

A

Immediate need - Accident or mechanical failure, injured crew member (immediately notify dispatch to notify BC)

Delayed need - scheduled maintenance as requested by shop supe, possible mechanical problems, crew member needing to leave.

Engineer (2 decks)

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