Owt

Question 1

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?

Answer 1

Galvanic

Question 2

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

Answer 2

Compound

Question 3

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

Answer 3

Sanding

Question 4

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

Answer 4

Spray washing

Question 5

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

Answer 5

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

Question 6

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

Answer 6

Heat loss over distance creates cold pockets.

Question 7

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

Answer 7

Fuel-fired

Question 8

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

Answer 8

Glow plugs

Question 9

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

Answer 9

Charging Quick Set Selector

Question 10

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

Answer 10

Maintainer Quick Set Selector

Question 11

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

Answer 11

Will default to a safe maintainer mode

Question 12

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

Answer 12

Conditioning Battery Mode

Question 13

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

Answer 13

Creates a vacuum

Question 14

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

Answer 14

Combustion

Question 15

What is the purpose of the flywheel?

Answer 15

Stores rotational energy to ensure rotation of the crankshaft

Question 16

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

Answer 16

Top dead center

Question 17

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

Answer 17

One

Question 18

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

Answer 18

Exhaust

Question 19

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

Answer 19

Blower

Question 20

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

Answer 20

When the piston uncovers the intake ports

Question 21

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

Answer 21

A wet liner

Question 22

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

Answer 22

The piston

Question 23

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

Answer 23

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

Question 24

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

Answer 24

Fuel efficiency

Question 25

Seals are comprised of what?

Answer 25

High grade flexible rubber compounds

Question 26

What should be done to prevent cross threading?

Answer 26

Start all fasteners by hand before tightening with tools

Question 27

What is the purpose of a gasket?

Answer 27

Provides a mechanical seal, between non-rotating parts

Question 28

When should gasket sealant be used?

Answer 28

Only as directed

Question 29

Which of these will cause a loss of coolant?

Answer 29

Faulty radiator cap

Question 30

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

Answer 30

Low level of urea

Question 31

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

Answer 31

Thermostat stuck closed

Question 32

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

Answer 32

Restricted intake or silencer

Question 33

What is one cause of air in the fuel lines?

Answer 33

Running out of fuel

Question 34

What can "knock"?

Answer 34

Over advanced timing of the injector

Question 35

What will cause a generator to wet stack?

Answer 35

Insufficient load

Question 36

EPA standards may require what to be used?

Answer 36

Diesel exhaust fluid

Question 37

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

Answer 37

Oil pump

Question 38

What is the purpose of an oil filter?

Answer 38

To remove unwanted contaminates

Question 39

What is the purpose of the oil cooler?

Answer 39

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

Question 40

Which component stabilizes oil pressure at all speeds?

Answer 40

Oil pressure relief valve

Question 41

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

Answer 41

Choke

Question 42

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

Answer 42

Reverse-osmosis

Question 43

When would a fuel transfer pump be used?

Answer 43

When gravity feed will not be possible or practical

Question 44

What is the function of the intake valves?

Answer 44

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

Question 45

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

Answer 45

Atomization

Question 46

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

Answer 46

Medium weight lines

Question 47

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

Answer 47

Distributor Fuel System

Question 48

A mechanical fuel pump is actuated by what?

Answer 48

Camshaft

Question 49

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

Answer 49

Slows down

Question 50

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

Answer 50

Throws coolant at high velocity into the surround casing

Question 51

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

Answer 51

To condition the coolant to minimize scale build up

Question 52

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

Answer 52

Diverts coolant to the expansion tank

Question 53

Supplemental coolant additives are a water-soluble chemical compound that protects metal surfaces of the cooling system against

Answer 53

Damage and corrosion

Question 54

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

Answer 54

Pinholes in the liner allowing coolant to leak through

Question 55

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

Answer 55

Inorganic

Question 56

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

Answer 56

Test strips

Question 57

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

Answer 57

Two-stage cleaner

Question 58

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

Answer 58

Air-to-Air aftercooler

Question 59

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

Answer 59

Reactive

Question 60

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

Answer 60

Nitrogen and water

Question 61

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

Answer 61

Digital

Question 62

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

Answer 62

Computing

Question 63

Why are electronic governors used instead of mechanical?

Answer 63

Easier to tune and change preselected speeds

Question 64

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

Answer 64

Droop base load

Question 65

What capability does the battery have?

Answer 65

Stores chemical energy and converts it into electrical energy

Question 66

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

Answer 66

The start switch and crank relay

Question 67

Which component engages the pinion gear?

Answer 67

Starter solenoid

Question 68

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

Answer 68

Sense the engine speed during startup

Question 69

What is the purpose of a battery?

Answer 69

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

Question 70

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

Answer 70

A mixture of water and sulfuric acid

Question 71

Specific gravity is affected by what two things?

Answer 71

State of charge and temperature

Question 72

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

Answer 72

Absorbed Glass Mat

Question 73

When would static ground be utilized?

Answer 73

While offloading fuel into a storage tank

Question 74

Why are static grounds used?

Answer 74

To prevent static electricity from reaching sparking potential

Question 75

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

Answer 75

Star ground

Question 76

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

Answer 76

Driven electrode with a resistance value of 5 Ohms

Question 77

Why are electrical systems and equipment grounded?

Answer 77

Protect personnel, equipment and facility cabling

Question 78

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

Answer 78

Lightning

Question 79

For a system to be considered grounded it must

Answer 79

Have at least one conductor or point intentionally grounded

Question 80

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.

Answer 80

Personal and Equipment Safety

Question 81

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

Answer 81

Jumper wire

Question 82

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

Answer 82

Provide alternate current carrying conductor

Question 83

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

Answer 83

Exothermic welding

Question 84

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

Answer 84

Terminal bars

Question 85

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

Answer 85

Damper windings

Question 86

Which alternator connection has three phase leads and a neutral?

Answer 86

Wye

Question 87

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

Answer 87

Exciter armature

Question 88

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

Answer 88

120

Question 89

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

Answer 89

Power to the meter will also go to zero and read 0 VAC

Question 90

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

Answer 90

Potential transformer

Question 91

If the Power factor meter indicates to the left, then the load is ______ and _______ is said to be

Answer 91

Lagging, inductive

Question 92

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

Answer 92

The voltage would decrease

Question 93

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

Answer 93

Fuse

Question 94

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

Answer 94

Cartridge

Question 95

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

Answer 95

Heat from passing current melts fuse link

Question 96

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

Answer 96

The breaker is capable of handling larger overloads

Question 97

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

Answer 97

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

Question 98

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

Answer 98

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

Question 99

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

Answer 99

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

Question 100

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

Answer 100

Augment with a load bank to comply with regulations and requirements

Question 101

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

Answer 101

Linear Actuator

Question 102

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

Answer 102

0 to 120 seconds

Question 103

Which component houses a microprocessor that controls all ATS functions?

Answer 103

Digital Control Board

Question 104

Which ATS command is used to start the generator?

Answer 104

TDES

Question 105

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

Answer 105

Equipment will burn up or operate incorrectly

Question 106

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

Answer 106

Open transition or closed transition

Question 107

Why must the transfer switch have a switched neutral?

Answer 107

To protect the generator from ground faults occurring on the utility

Question 108

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

Answer 108

Provide the same number of phases as the electrical service

Question 109

What are PLCs replacing?

Answer 109

Electromechanical relays

Question 110

How is power supplied to single unit PLCs?

Answer 110

Internally

Question 111

What hosts the PLC logic, memory and communications?

Answer 111

Central processing unit

Question 112

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

Answer 112

Ladder logic