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Volume 2 - On-Site Power Flashcards

Generators

1
Q

What type of corrosion is known to be the most common and destructive and occurs when two different types of metal contact each other with moisture present?

Lesson 1 General Tasks (M2L1)

A

Galvanic

M2L1T1 - Principles of Corrosion Control (5.1)

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2
Q

Which is a temporary protection of painted or unpainted surfaces where the coating system has been damaged or removed?

Lesson 1 General Tasks (M2L1)

A

Compound

M2L1T1 - Principles of Corrosion Control (5.1)

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3
Q

Which mechanical removal type uses abrasive paper to remove light corrosion not deeply pitted into metal?

Lesson 1 General Tasks (M2L1)

A

Sanding

M2L1T1 - Principles of Corrosion Control (5.1)

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4
Q

Which common cleaning removal type combines mechanical force from spray with the reactions of the chemicals used in the solutions?

Lesson 1 General Tasks (M2L1)

A

Spray washing

M2L1T1 - Principles of Corrosion Control (5.1)

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5
Q

What is the purpose of installing engine pre-heating devices?

Lesson 1 General Tasks (M2L1)

A

To prevent damage caused by cold starts and rapid acceleration to rated RPM.

M2L1T2 - Types of Engine Pre-Heating Devices (5.2)

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6
Q

What is a weakness of the Direct Immersion (Coolant Type) pre-heating device?

Lesson 1 General Tasks (M2L1)

A

Heat loss over distances creates cold pockets.

M2L1T2 - Types of Engine Pre-Heating Devices (5.2)

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7
Q

Which method of coolant pre-heating functions strictly operates off on-board battery voltage?

Lesson 1 General Tasks (M2L1)

A

Fuel-fired

M2L1T2 - Types of Engine Pre-Heating Devices (5.2)

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8
Q

Which method of air pre-heating functions strictly operates off on-board batter voltage?

Lesson 1 General Tasks (M2L1)

A

Glow plugs

M2L1T2 - Types of Engine Pre-Heating Devices (5.2)

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9
Q

Which component is used to set the required charging profile depending on the battery type?

Lesson 1 General Tasks (M2L1)

A

Charging Quick Set Selector

M2L1T3 - Battery Charger Components and Theory of Operation (5.4.1)

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10
Q

Which component allows the user to select the battery pre-charge status?

Lesson 1 General Tasks (M2L1)

A

Maintainer Quick Set Selector

M2L1T3 - Battery Charger Components and Theory of Operation (5.4.1)

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11
Q

What will occur after connecting the charger and not making a charging quick set selection within 10 minutes?

Lesson 1 General Tasks (M2L1)

A

Will default to a safe maintainer mode.

M2L1T3 - Battery Charger Components and Theory of Operation (5.4.1)

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12
Q

After the battery has completed charging, the batter charger will enter which mode of operation?

Lesson 1 General Tasks (M2L1)

A

Conditioning Battery Mode

M2L1T3 - Battery Charger Components and Theory of Operation (5.4.1)

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13
Q

When the piston begins to travel downward in the cylinder, what occurs?

Lesson 2 Engine Fundamentals

A

Creates a vacuum.

M2L2T1 - Components and Theory of Operation of a Gasoline Engine (8.1.1)

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14
Q

When fuel is mixed with air and ignited by an electric spark from the ignition system, what occurs?

Lesson 2 Engine Fundamentals

A

Combustion

M2L2T1 - Components and Theory of Operation of a Gasoline Engine (8.1.1)

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15
Q

What is the purpose of the flywheel?

Lesson 2 Engine Fundamentals

A

Stores rotational energy to ensure rotation of the crankshaft.

M2L2T1 - Components and Theory of Operation of a Gasoline Engine (8.1.1)

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16
Q

If the piston reaches its upper limit of travel, what is it called?

Lesson 2 Engine Fundamentals

A

Top Dead Center.

M2L2T1 - Components and Theory of Operation of a Gasoline Engine (8.1.1)

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17
Q

How many complete revolutions of the crankshaft are required for a two-stroke engine?

Lesson 2 Engine Fundamentals

A

One

M2L2T2 - Two Stroke Engine (8.2.1.1)

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18
Q

What type of valves are located in the overhead valve train of a two-stroke diesel engine?

Lesson 2 Engine Fundamentals

A

Exhaust

M2L2T2 - Two Stroke Engine (8.2.1.1)

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19
Q

What supplies fresh air to the air box in a two-stroke diesel engine?

Lesson 2 Engine Fundamentals

A

Blower

M2L2T2 - Two Stroke Engine (8.2.1.1)

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20
Q

When does the intake event begin on a two-stroke diesel engine?

Lesson 2 Engine Fundamentals

A

When the piston uncovers the intake ports.

M2L2T2 - Two Stroke Engine (8.2.1.1)

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21
Q

If coolant comes into direct contact with the cylinder liner, then what type of liner is used?

Lesson 2 Engine Fundamentals

A

A wet liner.

M2L2T3 - Four Stroke Diesel Engines (8.2.1.2)

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22
Q

If the cylinder head forms the top of the combustion chamber, then what component forms the bottom of the combustion chamber?

Lesson 2 Engine Fundamentals

A

The piston.

M2L2T3 - Four Stroke Diesel Engines (8.2.1.2)

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23
Q

What is the purpose of a four-stroke diesel engine?

Lesson 2 Engine Fundamentals

A

Convert the chemical energy of burning fuel into the mechanical energy of an engine.

M2L2T3 - Four Stroke Diesel Engines (8.2.1.2)

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24
Q

Which of the following is a major advantage of a diesel engine over gaseous engines?

Lesson 2 Engine Fundamentals

A

Fuel efficiency

M2L2T3 - Four Stroke Diesel Engines (8.2.1.2)

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25
Q

Seals are comprised of what?

Lesson 2 Engine Fundamentals

A

High grade flexible rubber compounds.

M2L2T4 - Replace Engine Seals and Gaskets (8.2.4.6)

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26
Q

What should be done to prevent cross threading?

Lesson 2 Engine Fundamentals

A

Start all fasteners by hand before tightening with tools.

M2L2T4 - Replace Engine Seals and Gaskets (8.2.4.6)

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27
Q

What is the purpose of a gasket?

Lesson 2 Engine Fundamentals

A

Provides a mechanical seal between non-rotating parts.

M2L2T4 - Replace Engine Seals and Gaskets (8.2.4.6)

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28
Q

When should gasket sealant be used?

Lesson 2 Engine Fundamentals

A

Only as directed.

M2L2T4 - Replace Engine Seals and Gaskets (8.2.4.6)

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29
Q

Which of these will cause a loss of coolant?

Lesson 2 Engine Fundamentals

A

Faulty radiator cap.

M2L2T5 - Gasoline Engine Malfunctions (8.1.2)

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30
Q

If a gasoline engine lubricating system is showing low oil pressure, which will NOT be the cause?

Lesson 2 Engine Fundamentals

A

Low level of urea.

M2L2T5 - Gasoline Engine Malfunctions (8.1.2)

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31
Q

What is a common cause of high temperature coolant system malfunction?

Lesson 2 Engine Fundamentals

A

Thermostat stuck closed.

M2L2T5 - Gasoline Engine Malfunctions (8.1.2)

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32
Q

In a gasoline engine, what would cause a lower power output in relation to the intake and exhaust system?

Lesson 2 Engine Fundamentals

A

Restricted intake or silencer.

M2L2T5 - Gasoline Engine Malfunctions (8.1.2)

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33
Q

What is one cause of air in the fuel lines?

Lesson 2 Engine Fundamentals

A

Running out of fuel

M2L2T6 - Diesel Engine Malfunctions (8.2.2)

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34
Q

What can “knock”?

Lesson 2 Engine Fundamentals

A

Over advanced time of the injector

M2L2T6 - Diesel Engine Malfunctions (8.2.2)

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35
Q

What will cause a generator to wet stack?

Lesson 2 Engine Fundamentals

A

Insufficient load

M2L2T6 - Diesel Engine Malfunctions (8.2.2)

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36
Q

EPA standards may require what to be used?

Lesson 2 Engine Fundamentals

A

Diesel exhaust fluid

M2L2T6 - Diesel Engine Malfunctions (8.2.2)

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37
Q

What component moves oil from the oil pan and delivers it throughout the engine?

Lesson 3 Engine Lubrication System

A

Oil Pump

M2L3T1 - Engine Lubrication System Components & Theory of Operations (10.1)

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38
Q

What is the purpose of an oil filter?

Lesson 3 Engine Lubrication System

A

To remove unwanted contaminates.

M2L3T1 - Engine Lubrication System Components & Theory of Operations (10.1)

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39
Q

What is the purpose of the oil cooler?

Lesson 3 Engine Lubrication System

A

To remove excess heat from oil to help retain the lubricating qualities of the oil.

M2L3T1 - Engine Lubrication System Components & Theory of Operations (10.1)

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40
Q

Which component stabilizes oil pressure at all speeds?

Lesson 3 Engine Lubrication System

A

Oil Pressure Relief Valve

M2L3T1 - Engine Lubrication System Components & Theory of Operations (10.1)

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41
Q

What component will be used to air in a cold engine start?

Lesson 4 Engine Fuel System

A

Choke

M2L4T1 - Gas Fuel System Components and Theory of Operation (11.1.1)

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42
Q

Which of these does NOT provide a form of fuel filtration?

Lesson 4 Engine Fuel System

A

Reverse-osmosis

M2L4T1 - Gas Fuel System Components and Theory of Operation (11.1.1)

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43
Q

When would a fuel transfer pump be used?

Lesson 4 Engine Fuel System

A

When gravity feed will not be possible or practical.

M2L4T1 - Gas Fuel System Components and Theory of Operation (11.1.1)

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44
Q

What is the function of the intake valves?

Lesson 4 Engine Fuel System

A

To control the entry of the air/fuel mixture into the combustion chambers.

M2L4T1 - Gas Fuel System Components and Theory of Operation (11.1.1)

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45
Q

What function of the fuel system breaks up the fuel into smaller particles?

Lesson 4 Engine Fuel System

A

Atomization

M2L4T2 - Diesel Fuel System Components and Theory of Operation (11.2.1)

46
Q

Which type of fuel lines are standard wire-braided hose with an inner lining?

Lesson 4 Engine Fuel System

A

Medium weight lines

M2L4T2 - Diesel Fuel System Components and Theory of Operation (11.2.1)

47
Q

Which fuel injection system is designed for applications with relatively broad speed requirements?

Lesson 4 Engine Fuel System

A

Distribution Fuel System

M2L4T2 - Diesel Fuel System Components and Theory of Operation (11.2.1)

48
Q

A mechanical fuel pump is actuated by what?

Lesson 4 Engine Fuel System

A

Camshaft

M2L4T2 - Diesel Fuel System Components and Theory of Operation (11.2.1)

49
Q

What happens to air velocity when it passes over the fins of air-cooled engines?

Lesson 5 Engine Cooling System

A

Slows down.

M2L5T1 - Coolant System Components and Theory of Operations (12.1)

50
Q

The centrifugal water pump draws coolant into the center of the impeller and then?

Lesson 5 Engine Cooling System

A

Throws coolant at high velocity into the surround casing.

M2L5T1 - Coolant System Components and Theory of Operations (12.1)

51
Q

What is the purpose of the additive within the coolant filters?

Lesson 5 Engine Cooling System

A

To condition the coolant to minimize scale build up.

M2L5T1 - Coolant System Components and Theory of Operations (12.1)

52
Q

When the pressure in the cooling system exceeds the maximum valve pressure, the radiator cap?

Lesson 5 Engine Cooling System

A

Diverts coolant to the expansion tank.

M2L5T1 - Coolant System Components and Theory of Operations (12.1)

53
Q

If left untreated, cavitation can cause what in a cooling system?

Lesson 5 Engine Cooling System

A

Pinholes in the liner allowing coolant to leak through.

M2L5T2 - Coolant Additives (12.7)

54
Q

Supplement coolant additives are water-soluble chemical compounds that protect metal surfaces of the cooling system against?

Lesson 5 Engine Cooling System

A

Damage and corrosion.

M2L5T2 - Coolant Additives (12.7)

55
Q

Conventional antifreezes use what type of additives to achieve corrosion and scale protection?

Lesson 5 Engine Cooling System

A

Inorganic

M2L5T2 - Coolant Additives (12.7)

56
Q

What is used to determine if the correct amount of coolant additives exist within the cooling system?

Lesson 5 Engine Cooling System

A

Test strips

M2L5T2 - Coolant Additives (12.7)

57
Q

What air cleaner has air travel through two filters before entering the intake piping?

Lesson 6 Engine Intake and Exhaust System

A

Two-stage cleaner

M2L6T1 - Intake and Exhaust Components and Theory of Operations (14.1)

58
Q

If cooling air passes over intake air, then this is a/an?

Lesson 6 Engine Intake and Exhaust System

A

Air-to-air aftercooler

M2L6T1 - Intake and Exhaust Components and Theory of Operations (14.1)

59
Q

What type of silencer is efficient at mitigating low to mid frequency noise only?

Lesson 6 Engine Intake and Exhaust System

A

Reactive

M2L6T1 - Intake and Exhaust Components and Theory of Operations (14.1)

60
Q

What is the end product if DEF is used in conjunction with an SCR Catalyst in a diesel exhaust system?

Lesson 6 Engine Intake and Exhaust System

A

Nitrogen and water

M2L6T1 - Intake and Exhaust Components and Theory of Operations (14.1)

61
Q

In order for the engine control unit to understand a sensor signal it must first be converted into?

Lesson 7 Engine Governing System

A

Digital

M2L7T1 - Electronic Governors (13.1.1)

62
Q

Which of the following functions of an electronic governing system comes after sensing?

Lesson 7 Engine Governing System

A

Computing

M2L7T1 - Electronic Governors (13.1.1)

63
Q

Why are electronic governors used instead of mechanical?

Lesson 7 Engine Governing System

A

Easier to tune and change preselected speeds.

M2L7T1 - Electronic Governors (13.1.1)

64
Q

In order to supply a utility with a certain amount of power, the ECU must be set to what?

Lesson 7 Engine Governing System

A

Droop Base Load

M2L7T1 - Electronic Governors (13.1.1)

65
Q

What capability does the battery have?

Lesson 8 Engine DC Electrical

A

Stores chemical energy and converts it into electrical energy.

M2L8T1 - DC Electrical System Components and Theory of Operation (9.1)

66
Q

Which component of the Starting System uses low amperage to operate a high amperage component?

Lesson 8 Engine DC Electrical

A

The start switch and crank relay

M2L8T1 - DC Electrical System Components and Theory of Operation (9.1)

67
Q

Which component engages the pinion gear?

Lesson 8 Engine DC Electrical

A

Starter solenoid

M2L8T1 - DC Electrical System Components and Theory of Operation (9.1)

68
Q

The MPU, crank positioning sensor and the cam positioning sensor all perform what function?

Lesson 8 Engine DC Electrical

A

Sense the engine speed during startup

M2L8T1 - DC Electrical System Components and Theory of Operation (9.1)

69
Q

What is the purpose of a battery?

Lesson 8 Engine DC Electrical

A

Store chemical energy and convert it into electrical energy when connected to a load.

M2L8T2 - Types of Batteries (9.5.1)

70
Q

What is used as an electrolyte solution in a lead-acid batter?

Lesson 8 Engine DC Electrical

A

A mixture of water and sulfuric acid

M2L8T2 - Types of Batteries (9.5.1)

71
Q

Specific gravity is affected by what two things?

Lesson 8 Engine DC Electrical

A

State of charge and temperature

M2L8T2 - Types of Batteries (9.5.1)

72
Q

Which type of battery is constructed of fine, highly porous, micro-fiber glass separators to absorb the electrolyte?

Lesson 8 Engine DC Electrical

A

Absorbed Glass Mat

M2L8T2 - Types of Batteries (9.5.1)

73
Q

When would static ground be utilized?

Lesson 9 Grounding Fundamentals

A

While offloading fuel into a storage tank.

M2L9T1 - Types of Grounds (7.1)

74
Q

Why are static grounds used?

Lesson 9 Grounding Fundamentals

A

To prevent static electricity from reaching sparking potential.

M2L9T1 - Types of Grounds (7.1)

75
Q

Which type of grounding radiates wires horizontally from a central point?

Lesson 9 Grounding Fundamentals

A

Star Grounds

M2L9T1 - Types of Grounds (7.1)

76
Q

Which of the following is best example of an equipment ground?

Lesson 9 Grounding Fundamentals

A

Driven electrodes with a resistance value of 5 Ohms.

M2L9T1 - Types of Grounds (7.1)

77
Q

Why are electrical systems and equipment grounded?

Lesson 9 Grounding Fundamentals

A

Protect personnel, equipment and facility cabling.

M2L9T2 - Principles of Grounding (7.2)

78
Q

Electrical systems are grounded to prevent surges due to _____, line surges and unintentional contact with higher voltage lines?

Lesson 9 Grounding Fundamentals

A

Lightning

M2L9T2 - Principles of Grounding (7.2)

79
Q

For a system to be considered grounded, it must?

Lesson 9 Grounding Fundamentals

A

Have at least one conductor or point intentionally grounded.

M2L9T2 - Principles of Grounding (7.2)

80
Q

Which grounding principles is defined below?

Protects personnel from shock, electrocution, fire and explosion hazards by equalizing the potential between ground and any normally non-current carrying conductive materials.

Lesson 9 Grounding Fundamentals

A

Personal and Equipment Safety

M2L9T2 - Principles of Grounding (7.2)

81
Q

What boding method is used to connect components separated by distance and can be solid, stranded, braided, bare or insulated?

Lesson 9 Grounding Fundamentals

A

Jumper Wire

M2L9T3 - Bonding (7.6)

82
Q

Which of the following is NOT a reason for bonding equipment?

Lesson 9 Grounding Fundamentals

A

Provide alternate current carrying conductor.

M2L9T3 - Bonding (7.6)

83
Q

When bonding electrical system components, which of the following methods is appropriate?

Lesson 9 Grounding Fundamentals

A

Exothermic welding

M2L9T3 - Bonding (7.6)

84
Q

What bonding method utilizes rigid plates that can be used to span a gap to connect two or more components of an electrical system?

Lesson 9 Grounding Fundamentals

A

Terminal bars

M2L9T3 - Bonding (7.6)

85
Q

Which alternator component(s) help(s) to maintain stable voltage during load changes?

Lesson 10 AC Generating System

A

Damper Windings

M2L10T1 - Alternators (15.1.1)

86
Q

Which alternator connection has three phase leads and a neutral?

Lesson 10 AC Generating System

A

WYE

M2L10T1 - Alternators (15.1.1)

87
Q

What exciter component rotates and provides AC voltage to the rectifier components?

Lesson 10 AC Generating System

A

Exciter Armature

M2L10T1 - Alternators (15.1.1)

88
Q

How many degrees apart is each phase winding in a three-phase alternation positioned?

Lesson 10 AC Generating System

A

120 degrees

M2L10T1 - Alternators (15.1.1)

89
Q

If voltage output goes to zero, what will happen to the voltmeter?

Lesson 10 AC Generating System

A

The power to the meter will also go to zero and read 0 VAC.

M2L10T2 - AC Generating System Controls (15.3.1)

90
Q

If a transformer uses two inductors, then it is said to be what kind of transformer?

Lesson 10 AC Generating System

A

Potential transformer

M2L10T2 - AC Generating System Controls (15.3.1)

91
Q

If the Power Factor meter indicates to the left, then the load is _____, and is said to be _____.

Lesson 10 AC Generating System

A

Lagging, inductive.

M2L10T2 - AC Generating System Controls (15.3.1)

92
Q

If the Automatic Voltage Regulator computed a positive error signal, then how would that affect the stator’s output voltage?

Lesson 10 AC Generating System

A

The voltage would decrease.

M2L10T2 - AC Generating System Controls (15.3.1)

93
Q

Which type of protective device provides a time delay and must be replaced when actuated?

Lesson 10 AC Generating System

A

Fuse

M2L10T3 - Protective Devices (15.4.1)

94
Q

If a circuit has higher amperage or volt ratings, then what type of fuse will be used?

Lesson 10 AC Generating System

A

Catridge

M2L10T3 - Protective Devices (15.4.1)

95
Q

If current rises above the amperage rating on a fuse link, what will happen?

Lesson 10 AC Generating System

A

Heat from passing current melts the fuse link.

M2L10T3 - Protective Devices (15.4.1)

96
Q

Why would a piece of equipment be equipped with a thermal-magnetic circuit breaker?

Lesson 10 AC Generating System

A

The breaker is capable of handling larger overloads.

M2L10T3 - Protective Devices (15.4.1)

97
Q

The Air Force Form 487 (Generator Operating Log) is used to?

Lesson 11 Real Property Installed Equipment (Generators)

A

Record operating data, the condition of engine/generator systems, discrepancies, corrective actions taken and to determine the need for maintenance.

M2L11T1 - Real Property Installed Equipment (N/A)

98
Q

Upon starting the engine, check for excessive smoke. Why?

Lesson 11 Real Property Installed Equipment (Generators)

A

Because this is indicative of malfunctions in either the fuel or intake system.

M2L11T1 - Real Property Installed Equipment (N/A)

99
Q

If possible, why should an infrared scan of inner equipment be accomplished on an AC system?

Lesson 11 Real Property Installed Equipment (Generators)

A

To detect loose connections, imbalanced circuits, damaged switches, and material defects unseen by the naked eye.

M2L11T1 - Real Property Installed Equipment (N/A)

100
Q

If facility loads are not sufficient in bringing the generator to the required load level, then what should be done?

Lesson 11 Real Property Installed Equipment (Generators)

A

Augment with a load bank to comply with regulations and requirements.

M2L11T1 - Real Property Installed Equipment (N/A)

101
Q

Which component moves the contact assemblies between Source 1 and Source 2?

Lesson 12 Automatic Transfer Switches

A

Linear Actuator

M2L12T1 - Components and Theory of Operations of Automatic Transfer Switches (17.1)

102
Q

How long is the Time Delay Normal to Emergency (TDNE) adjustable for?

Lesson 12 Automatic Transfer Switches

A

0 to 120 seconds

M2L12T1 - Components and Theory of Operations of Automatic Transfer Switches (17.1)

103
Q

Which component houses a microprocessor that controls all ATS functions?

Lesson 12 Automatic Transfer Switches

A

Digital Control Board

M2L12T1 - Components and Theory of Operations of Automatic Transfer Switches (17.1)

104
Q

Which ATS command is used to start the generator?

Lesson 12 Automatic Transfer Switches

A

TDES

M2L12T1 - Components and Theory of Operations of Automatic Transfer Switches (17.1)

105
Q

What will happen if the generator’s voltage is incompatible with the electrical service?

Lesson 12 Automatic Transfer Switches

A

Equipment will burn up or operate incorrectly.

M2L12T2 - Compatibility Between Transfer Switch, Generator, and Electrical Service (17.8)

106
Q

Which of the following does NOT need to be known to complete a load survey?

Lesson 12 Automatic Transfer Switches

A

Open transition or closed transition.

M2L12T2 - Compatibility Between Transfer Switch, Generator, and Electrical Service (17.8)

107
Q

Why must the transfer switch have a switched neutral?

Lesson 12 Automatic Transfer Switches

A

To protect the generator from ground faults occurring on the utility.

M2L12T2 - Compatibility Between Transfer Switch, Generator, and Electrical Service (17.8)

108
Q

In order for the facility load to operate properly, the generator and transfer switch must do what?

Lesson 12 Automatic Transfer Switches

A

Provide the same number of phases as the electrical service.

M2L12T2 - Compatibility Between Transfer Switch, Generator, and Electrical Service (17.8)

109
Q

What are PLC’s replacing?

Lesson 12 Automatic Transfer Switches

A

Electromechanical relays

M2L12T3 - Programmable Logic Controllers: Components and Theory of Operation (17.10)

110
Q

How is power supplied to single unit PLC’s?

Lesson 12 Automatic Transfer Switches

A

Internally

M2L12T3 - Programmable Logic Controllers: Components and Theory of Operation (17.10)

111
Q

What hosts the PLC logic, memory and communications?

Lesson 12 Automatic Transfer Switches

A

Central Processing Unit

M2L12T3 - Programmable Logic Controllers: Components and Theory of Operation (17.10)

112
Q

What was invented to ease the transition for technicians programming PLC’s, while they replaced mechanical relay logic systems?

Lesson 12 Automatic Transfer Switches

A

Ladder Logic

M2L12T3 - Programmable Logic Controllers: Components and Theory of Operation (17.10)

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