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Engineer Cert > Maintenance > Flashcards

Maintenance Flashcards

1
Q

Inspect apparatus at least ______, within______, or _________

A

Weekly, within 24 hours after use or repair, or prior to being place in service

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2
Q

List all 10 places where you can find emergency apparatus related laws and regulations

A

NFPA, EPA,DOT, ARS, ADOT, OSHA, NTEA, ADEQ, TFD Manual of Operations, TFD Master Memos, Vehicle Data Plates

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3
Q

What does NTEA stand for?

A

National Truck Equipment Association

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4
Q

What does ADEQ stand for?

A

Arizona Department of Environmental Quality

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5
Q

What is the PM interval scheduling for frontline pumpers, ladders and medics? Reserve rigs?

A

3500 miles or 250 engine hours.
3 months for all frontline
6 months for reserves

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6
Q

How many different PM levels are there?

A

Pumpers, medics, support equipment- 4 levels

Ladders- 6 levels

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7
Q

What are the 4 things involved on an apparatus road worthy test?

A

Accelerate to 35 mph within 25 seconds
Come to a full stop within 35 feet from 20 MPF
Top speed of 50 mph
Parking brake hold on a 20% grade

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8
Q

When are pump tests performed?

A

From the factory
Upon delivery
Annually
After major repair of pump OR drive component

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9
Q

When does NFPA mandate an aerial test?

A

Every 5 years

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10
Q

When does TFD test aerials?

A

Every year

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11
Q

What is NFPA standard is Standard for Apparatus Driver/Operator?

A

NFPA 1002

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12
Q

What NFPA is Standard for Emergency Vehicle Technician Qualifications?

A

NFPA 1071

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13
Q

What are the levels of EVTs?

A

Level I, Level II, and Master Level III

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14
Q

What NFPA is the Standard for Fire Department Occupational Safety and Healt?

A

NFPA 1500

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15
Q

Which NFPA is the Standard for Automotive Fire Apparatus?

A

NFPA 1901

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16
Q

Which NFPA standard would talk about fire pump service tests?

A

NFPA 1911 Standard for the Inspection, Maintenance, Testing, and Retirement of In-Service Emergency Vehicles

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17
Q

Which NFPA is the Testing Fire Department Aerial Devices?

A

NFPA 1914

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18
Q

Which NFPA is for the Standard for Fire Department Preventive Maintenance Program?

A

NFPA 1915

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19
Q

Are engineers qualified to decide whether or not a truck is safe to operate?

A

YES

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20
Q

When must you turn off the TELMA?

A

During slippery conditions

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21
Q

What are 5 forms/packets you can find along side the apparatus log book?

A 
Accident packet
Injury report
Property damage form
SCBA inspection form
Ground ladder inspection form
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22
Q

What are 7 items you can find in the apparatus log book?

A 
Data sheets
Inspection instructions
Checklists
Monthly fuel and oil records
Maintenance request forms (old and new)
Reserve apparatus forms
Hose change record
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23
Q

For an engine to operate, air needs to bee ____ and ____

A

Cool and dry

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24
Q

Use your senses to find what 6 things when checking out a mechanical engine?

A 
Leaks
Knocks
Misses
Strange noises
Strange smells
Improper operation
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25
Q

When it comes to air flow, remove from service when there is an activated…

A

Air filter restriction indicator light

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26
Q

Molecule of air through fire apparatus engine…

A

Turbo compressor
Charge air cooler
Engine cylinder
Turbo turbine

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27
Q

8V-92 TA

Detroit Diesel

A 
2 Stroke
Mechanical Control
450-470 HP
1550 Torque
5-80psi oil pressure
Coolant 160-210
Max coolant 220
40W oil Only
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28
Q

Series 40

Detroit Diesel

A 
4 Stroke
Mechanical/Electronic Control
300-330 HP
950 Torque
Oil Pressure 20-70psi
Coolant 180-205
Max coolant 230
15W-40 oil only
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29
Q

Series 60

Detroit Diesel

A 
4 stroke
Electronic Control
290-515 HP
1550 Torque
Oil pressure 5-65psi
Coolant temp 160-210
Max coolant 230
15W-40 Oil only
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30
Q

Cummins ISC

A 
4 Stroke
Electronic Control
330 HP
950 Torque
Oil pressure 20-80psi
Coolant Temp 170-210
Max Coolant 230
15W-40 Oil Only
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31
Q

Cummins ISL

A 
4 Stroke
Electronic Control
370-400 HP
1200 Torque
Oil pressure 20-80psi
Coolant temp 180-212
Max Coolant 230
15w-40 Oil only
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32
Q

MBE 900

A 
4 Stroke
Electronic Control
330 HP
1000 Torque
Oil pressure 10-60psi
Coolant Temp 180-212
Max Coolant 230
15W-40 Oil only
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33
Q

Cat C7

A 
4 Stroke
Electronic Control
330 HP
1200 Torque
Oil pressure 10-65 psi
Coolant 165-215
Max Coolant 230
15W-40 Oil only
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34
Q

International DT 466 and 530

A 
4 Stroke
Electronic Control
195 HP
500 Torque
Oil pressure 20-70psi
Coolant 180-215
Max Coolant 230
15W-40
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35
Q

On a diesel engine, use your sense to find…

A

Leaks, knocks, misses, noises, smells, and improper operation

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36
Q

An air filter is designed to…

A

Remove particulates from the air that can damage an engine without restricting airflow

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37
Q

With an air filter, do not…

A

Blow air into it to clean
Remove it or make adjustments

It can take up to an hour to properly align one. It could cause engine to De-rate

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38
Q

The thing called where the air filter meets the body or something…

A

Transition plate

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39
Q

What is a blower on a diesel engine?

A

Used to scavenge cylinders in a 2 stroke
Does not increase HP
Air box must remain open to prevent engine damage

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40
Q

Intercooler is called…

A

Charge Air Cooler

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41
Q

Turbochargers are ____ lubricated

A

Oil

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42
Q

VGT…

A

Variable Geometry Turbocharger

Turbo that moves the turbine more in or out of the exhaust flow

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43
Q

Turbocharger life can be maximized by allowing the engine to idle for…

A

1-2 minutes before shutdown

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44
Q

Route of air…

A 
Ember separator
Air filter
Turbo compressor
Charge air cooler
Intake manifold
Combustion cylinder
Exhaust manifold
Turbo turbine
Exhaust pipe
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45
Q

Is plugged filter indicator an OOS item?

A

Yes

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46
Q

Fuel system consists of…

A 
Fuel Tank
Fuel Lines
Fuel Filter
Fuel Pump
Injectors
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47
Q

Keep fuel tank full to prevent…

A

Moisture buildup

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48
Q

Class 2 fuel leak…

A

OOS

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49
Q

With fuel, most contamination comes from…

A

Fuel Cap

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50
Q

Fuel is also used to…

A

Cool and lubricate injection system

51
Q

Fuel filters are changed during ___ level PM

A

B level

52
Q

Fuel lines contain both ___ and ___ pressure fuel

A

High and Low

53
Q

Fuel pump…

A

Low pressure
Supplies injection pump
Integrated into primer pump

54
Q

Injection pump…

A

High pressure fuel

Individual delivery valves

55
Q

What is the governor control on a mechanically controlled engine?

A

The injection pump

56
Q

What are the 5 types of fuel injectors on a diesel fire apparatus?

A 
Mechanical unit
Electronic unit
HEUI
Common rail
Pencil
57
Q

What does HEUI stand for?

A

Hydraulic Electronic Unit Injectors

58
Q

What is the pressure on HEUI injectors?

A

500-3600 psi

59
Q

What is the HEUI Oil Activation Pump?

A

High pressure oil pump
Supplies high pressure oil to activate HEUI injectors
Used on both mechanical and electronic engines

60
Q

The lubrication system consists of…

A 
Engine oil
Oil filters
Oil dipstick
Oil sensors
Oil cooler and relief valves
61
Q

Remove from service if there is a class ___ oil leak.

A

Class 3

62
Q

When do you check engine oil?

A

Level surface, cold, or after at least 5 minutes after shutdown.

63
Q

Maintain oil level between…

A

Add and full

64
Q

An overfilled crankcase may indicate…

A

Excessive oil

Water and/or fuel in crankcase

65
Q

An underfilled crankcase may indicate…

A

Fuel system problems

66
Q

Oil filters…

A

Designed to filter harmful contaminants from the engine oil
Integrated bypass valve for cold weather operation or filter restriction
Replaced during each PM

67
Q

What are oil pressure sensors used for?

A

Engine performance management
Charging systems
Vehicle interlocks

68
Q

Lubrication key points…

A

Class 3 leak is OOS
Proper oil use is critical
Refer to data sheet if unsure
Oil level is critical in HEUI injection systems
Overfull oil level level could indicate-Overfilled, fuel and/or coolant in oil
Keep level between add and full

69
Q

What does the cooling system consist of?

A 
Radiator
Reservoir
Water pump
Thermostat
Hoses
70
Q

What is the ratio of antifreeze and water?

A

50/50

71
Q

How do you check coolant level?

A

Through sight glass or 2” below radiator neck

72
Q

What is the rule of thumb for max coolant temperature?

A

220

73
Q

What is OOS for coolant?

A

Class 3 leak

74
Q

What kind of water can you add to coolant in the field?

A

Distilled water

75
Q

Don’t twist the….

A

Serpentine belts

76
Q

V-belts are allowed ___ of deflection

A

1/2 inch

77
Q

With cooling system, be aware of…

A

Leaks
Noisy bearings in tensioners, pulleys, and water pumps
Fan when deep water fording
Leaks from pump weep hole

78
Q

What is the coolant flow?

A 
Engine
Thermostat
Radiator
Water pump
Back to engine
79
Q

PH for coolant in Diesel should be…

A

Between 8-11

80
Q

Coolant filters are designed to…

A 
Filter impurities like sand and rust
Condition coolant by softening water to minimize scale
Maintain acid free condition
Act as rust preventative
Corrosion inhibitor
They are replaced during B PMs
81
Q

The water pump is ___ driven

A

Gear

82
Q

Diesel engines use ___ type thermostat

A

Blocking

83
Q

Coolant system damage…

A

Loose ground cables create stray electrical current
Calcium impedes the transfer of heat
Chloride decarbonizes iron

84
Q

What is linear cavitation?

A

When there is an implosion of water on cylinder wall that can cause damage

85
Q

What are the exhaust system components?

A 
Exhaust manifolds
Turbocharger
Exhaust piping
Engine brake
Emissions
86
Q

When it comes to exhaust, what is considered out of service?

A

Any exhaust leak

87
Q

A submerged tailpipe can…

A

Stall the engine

88
Q

Exhaust leaks at the manifold will…

A

Reduce engine performance

89
Q

An exhaust brake is also known as a…

A

Pac Brake

90
Q

An exhaust brake is a_____ activated valve

A

Pneumatically

91
Q

Where is the exhaust brake located?

A

Between the exhaust manifold and the muffler

92
Q

What does the exhaust brake do?

A

It restricts exhaust flow from the engine

93
Q

How are emissions test dates determined?

A

The last digit of the shop number equals the month

There is no testing in November or December

94
Q

When are brand new diesel units tested?

A

On the fourth year of service

95
Q

Pertaining to diesel exhaust… what does SCR stand for?

A

Selective Catalytic Reduction

96
Q

What is DEF made out of?

A

32.5% urea and 67.5% deionized water

97
Q

What determines DEF shelf life?

A

Storage Temperature

98
Q

What are the properties of DEF?

A

Non toxic
Non polluting
Non Flammable

99
Q

What is the PH of DEF?

A

Approx 9

100
Q

When does passive regeneration occur?

A

During normal engine operation

101
Q

When does active regeneration occur?

A

When exhaust temps are not high enough to passively regenerate

102
Q

What is the difference between the amber “check engine” and the red “stop engine”?

A

Amber check engine indicates a non-critical system fault. You can drive the vehicle to the end of the shift

Red stop engine indicates a serious engine fault that may result in damage has occurred. Shut down as soon as possible

103
Q

What is the HEST light?

A

High Exhaust System Temperature

Indicates that active regeneration has been initiated and the exhaust temps will be elevated above normal.

The light will remain on until the exhaust temps have dropped below 977.

If the light is on and the speed is dropped below 5mph, the light will remain on until the speed increased 3mph above the threshold and the regen process finishes

104
Q

What is the DPF light?

A

Diesel Particulate Filter

Indicates that the filter has not been able to regenerate under the previous engine operating conditions and is in need of assistance in order to perform an active regeneration.

105
Q

What are the different stages of the DPF light?

A

On solid (indicates low to medium levels of particulate build up)

Flashing (indicates medium to high levels of particulate build up and a signal that a DPF regeneration is needed)

Flashing with amber Engine Warning light (indicates a high level of particulate build up and a DPF cleaning is required immediately)

106
Q

DEF Level Low Level Light

A

Know what it looks like.

Indicates that DEF is low

107
Q

What are the exhaust system key points?

A

Leaks are OOS
Leaks reduce engine power
New exhaust systems have lower clearance
Be aware of raised surfaces
Pay attention to exhaust indicator lights on new rigs
Be able to recognize passive, active or stationary regeneration

108
Q

What are the components of the electrical system?

A 
12v Electricity
Batteries
Cables and wiring
Starter
Alternator and voltage regulator
Shoreline charger
Load manager
109
Q

Remove rig from service with an __________ charging system

A

Inoperative

110
Q

Voltage is like electrical ______
Amperage is like electrical______
Resistance is like electrical ______

A

Pressure
Flow
Friction loss

111
Q

How many volts will damage the computer?

A

16v+

112
Q

How low of volts will affect computer performance?

A

11v or less

It may shut down the engine and may cause erratic shifting

113
Q

With the ampmeter, the operating amperage should be….

A

Positive

114
Q

_____v is fully charged

_____v or less is bad battery

A
  1. 6v

9. 6v

115
Q

What are we inspecting on batteries?

A 
Cables
Hold down
Connections
Terminal corrosion
Electrolyte level
Case (damage/cracks)
116
Q

Can we remove battery cables?

A

No

117
Q

Do not crank starter for longer than___ seconds without cooling for ___ seconds

A

Start 15

Cool for 60

118
Q

Amperage range of our alternators…

A

270-320 amps

119
Q

Alternators are ____ and ____ regulated.

A

Internally and externally

120
Q

What is proper voltage range?

A

13.8-14.5

121
Q

What determines alternator output?

A

Field voltage

122
Q

The onboard battery charger will not ____ or ____ the batteries

A

Overcharge or damage

123
Q

The amperage on the plug receptacle does or does not represent the output voltage of the shoreline charger?

A

Does not

Engineer Cert (9 decks)

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