Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Engineer > DMV / Engine > Flashcards

DMV / Engine Flashcards

(78 cards)

Start Studying
1
Q

Static air leakage test

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Applied air leakage test

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Low air warning

A

60

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Compressor cut in

A

85

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Compressor cut out

A

120-130

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Maxi brake test

A

25-40

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Roll out test

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Engine temperature

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Engine RPM’s

A

600 rpm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Engine Oil pressure

A

40-50 psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Voltmeter readings

A

13.8-14.2 when engine is running, 12 not running

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Transmission temperature

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Steering wheel play

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Lights – visible low beams and high beams

A

Visible low beams – 250’

High beams – 350’-500’

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Engine pressure formula

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Nozzle reaction formula

A

1.5 x Diameter squared x nozzle pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Momentary nozzle reaction

A

1.8 x D2 x pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Nozzle reaction of fog nozzle

A

½ gpm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Discharge GPM From hydrant or open butt

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Friction Loss
>100 gpm – 2Q2 + Q | <100gpm = 2Q2 +1/2Q
26
Back pressure
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
27
Intake pressure – | In relay pumping ops min engine pressure
10psi + FL
28
Friction Loss in: ``` Monitor Standpipe Small appliances Disabled engines Wildland tees ```
``` 15 25 10 25 5 ```
29
Automatic sprinkler connections: Initial pressure = Max pressure =
Initial 150 Max 200
30
High Rise PSI and GPM 1 3/4 2 1/2 2 1/2 breakaway smooth bore
75 psi 150 GPM 100 psi 250 GPM 50 psi 160 GPM
31
set relief valve or pressure governor when:
pumping 2 or more hand lines or pumping a master stream
32
Class A Foam Suppression Overhaul Pretreat
0. 2 % 0. 1-0.2 % 0. 5-1 %
33
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 ```
``` 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
Smooth Bore Tips- handline 1 1 1/4 1 3/8
200 250 325
35
Wildland 150’ of 11/2” with 1 tee and 50 feet of elevation
184
36
400’ of 11/2” with 2 tee’s and 40 feet of elevation down
134
37
Relay pumping One engine is pumping 2 13/4” lines at 125gpm each. They are 200’ away
?
38
Relay Pumping | One engine is pumping a monitor with a 13/8” tip portable. They are 500’ away
?
39
21/2” with the high rise pack ``` 100 150 200 250 300 ```
``` 112 115 118 121 124 ```
40
Standpipe Pump to the 5th floor with 400’ of 4” supply using the high rise pack
161
41
Pump to the 6th floor with 200’ of 4” supply using the high rise pack
168
42
Pump to the 8th floor with 300’ of 4” supply using the high rise pack
179
43
Pump to the 4th floor using 100’ of 21/2” with a 1” tip and 300’ of 4” supply
118
44
Pump to the 5th floor using 200’ of 21/2” with a 11/8” tip and 400’ of supply
137
45
Pump to the 6th floor using 50’ of 21/2 extended with the high rise pack and 500’ of 4’ supply
164
46
Ladder Pipe 11/2’ tip 60’ feet high with 400’ of 4” supply
180
47
113/4” tip 50’ feet high with 500’ feet of 4” supply
216
48
2” tip 70’ feet high with 600’ of 4”
285
49
13/8” tip 40’ high with 400’ of 4”
158.5
50
13/8” tip 40’ high with 400’ of 4”
170.5
51
17/8” tip 50 feet high with 200’ of supply
200
52
Portable Monitor 200 feet of 4” with 13/4” tip
115
53
300 feet of 4” with 11/2” tip
103
54
300 feet of 4” with 2” tip
135
55
200 feet of 4” with a 13/8” tip
108.5
56
250’ of 4” with 17/8” tip
126.5
57
300’ of 4” with 15/8” tip
119
58
PUC fuel tank
75 gallons
59
PUC water tank
500 gallons 4" overlfow poly water tank
60
PUC front axle
OshKosh TAK-4 twin torsion 19,500 lbs
61
PUC rear axle
Meritor RS24-160 24,000 lbs Spring-Leaf springs
62
PUC cab lift
- Electric over hydraulic - Remote or fixed panel - Manual override
63
Batteries
- 6 Deka Group 31 - Single Start Battery System - AXT Battery Compartment - remote jump start - You can access the Batteries from inside the cab
64
PUC Dual pro charger
- Single system - Dual Bank - Remote charge indicator - Individual amperage per bank
65
PUC load manager
- Kussmaul Mark 1 | - 7 Channels
66
PUC scene lights
- Magnafire 70W 12V - One on each side on the rear of the cab - Switch locations - Center Consol in cab - Engineer Panel
67
PUC pump
- 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
PUC pump seals
- 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
PUC off side 2 1/2 and 4" manual socket size and location
???
70
PUC pump and roll
- 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
PUC foam pro
- 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
PUC Caterpillar C-13 powerplant
- 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
PUC DPF (diesel particulate filter)
``` 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
Allison Gen 4 4000 EVS P
- 6 speed - push button controlled - no retarder - auxiliary cooler through heat exchanger
75
PUC Meritor EX225 air disk brakes
- 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
PUC- when not to pump from same manifold
- 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
Reasons to take Apparatus OOS.
Scheduled Maintenance Mechanical Failure Accidents Lack of staffing
78
Apparatus OOS categories (2 levels)
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)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions