Module 2 On-Site Power

Camshaft

A mechanical fuel pump is actuated by what? MPU DC Power Crankshaft Camshaft

Conditioning battery mode

After the battery has completed charging, the battery charger will enter which mode of operation? After charging it will turn off Analyzing battery mode Maintaining battery mode Conditioning battery mode

Inorganic

Conventional antifreezes use what type of additives to achieve corrosion and scale protection? Petrol Inorganic Organic Metal

Diesel exhaust fluid

EPA standards may require what to be used? JP8 Intake noise reducer Catalytic converter Diesel exhaust fluid

Lightning

Electrical systems are grounded to prevent surges due to __________, line surges and unintentional contact with higher voltage lines? Low voltage Loose connection Lightning Overloads

Have at least one conductor or point intentionally grounded

For a system to be considered grounded it must Have at least one conductor or point intentionally grounded Have two ground electrodes and a grounding wire between them Have three or more ground electrodes connected in series to one another Have at least one ground electrode and ground wire

One

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

120

How many degrees apart is each phase winding in a three-phase alternation positioned? 120 105 110 7

Cartridge

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

Low level of urea

If a gasoline engine lubricating system is showing low oil, pressure, which will NOT be the cause? Low level of urea Improper oil Defective oil pump Defective gauge

Potential transformer

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

A wet liner

If coolant comes into direct contact with the cylinder liner, then what type of liner is used? An air cooled liner A dry liner A wet liner A lubrication liner

Air-to-air aftercooler

If cooling air passes over intake air then this is a/an? Air-to-air aftercooler Air-to-exhaust aftercooler Air-to-oil aftercooler Air-to-coolant aftercooler

Heat from passing current melts fuse link

If current rises above amperage rating on a fuse link what will happen? The generator's annunciation panel will illuminate Heat from passing current melts fuse link Heat from passing current will trip the spring actuator The resistance will vary, depending on the voltage that was applied

Augment the load bank to comply with regulations and requirements

If facility loads are not sufficient in bringing the generator to the required load level, then what should be done? Have the user plug in heaters to bring within compliance of regulations and requirements Verify the load capability of the generator Augment the load bank to comply with regulations and requirements Add other facilities to the circuit

Pin holes in the liner, allowing coolant to leak through

If left untreated, cavitation can cause what in a cooling system? Pin holes in the liner, allowing coolant to leak through Oil to enter the cooling system decreasing heat transfer Cracks in the block, allowing coolant to leak through Veins to melt decreasing cooling system temperature

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

If possible, why should an infrared scan of inner equipment be accomplished on an AC system? To verify the thermostat is opening at the correct time To detect loose connections, imbalanced circuits, damaged switches, and material defects unseen by the naked eye To detect tight connections, balanced circuits, undamaged switches, and serviceable material unseen by the naked eye To detect loose connections, imbalanced circuits, damaged switches, and material defects seen by the naked eye

The voltage would decrease

If the Automatic Voltage Regulator computed a positive error signal, then how would that affect the stator's output voltage? The voltage would stay the same The voltage would decrease No change in current would occur The voltage would increase

The piston

If the cylinder head forms the top of the combustion chamber, then what component forms the bottom of the combustion chamber? The oil pan The connecting rod The valve train The piston

Top dead center

If the piston reaches its upper limit of travel, what is it called? Exhaust stroke Compression stroke Bottom dead center Top dead center

Lagging, inductive

If the power factor meter indicates to the left, then the load is _______, and is said to be ________. Lagging, capacitive Lagging, inductive Leading, inductive Leading, capacitive

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

If voltage output goes to zero, what will happen to the volt meter? Power to the meter will also go to zero and read 120 VAC Power to the meter will also go to zero and read 0 VAC Power to the meter will remain and read 120 VAC Power to the meter will remain and read 0 VAC

Restricted intake or silencer

In a gasoline engine, what would cause a lower power output in relation to the intake and exhaust system? Restricted intake or silencer Wet stacking Loss of engine prime Low level of urea

Digital

In order for the engine controlled unit to understand a sensor signal it must first be converted to Analog Binary Digital Code

Droop base load

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

High-grade flexible, rubber compounds

Seals are comprised of what? Epoxy impregnated fiberglass Vulcanized aluminum High-grade flexible, rubber compounds Cork

State of charge and temperature

Specific gravity is affected by what two things? State of charge and elevation Type of water and temperature State of charge and temperature Battery size and voltage

Damage and corrosion

Supplemental coolant additives are a water soluble chemical compound that protects metal surfaces of the cooling system against Stress fractures Damage and corrosion Ethylene depletion Propylene depletion

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

The Air Force form 487 (Generator Operating Log) is used to Record operating data, the condition of the engine/generator systems, discrepancies, corrective actions taken, and to determine the need for maintenance Track both maintenance and man-hours Provide an accurate record of past maintenance on a generator Determine the system condition, supportability, and reliability

Sense the engine speed during startup

The MPU, crank positioning sensor and camp positioning sensor all perform what function? Energize the starter solenoid Change electrical energy into mechanical energy Sense the engine speed during startup Create a DC voltage, which is used to count engine rotations

Throws coolant at high velocity into the surround casing

The centrifugal water pump draws coolant into the center of the impeller and then Throws coolant at low, velocity into the surround casing Develops low pressure in the cooling system Throws coolant at high velocity into the surround casing Develops high pressure in the cooling system

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

Upon starting the engine, check for excessive smoke. Why? Because this is indicative of malfunctions in either the fuel or intake system Because this is indicative of malfunctions in either the cooling or exhaust system Because this is not indicative of malfunctions in either the fuel or intake system Because this is not indicative of malfunctions in either the cooling or exhaust systems

Two-stage cleaner

What air cleaner has air travel through two filters before entering the intake piping? Double pleated cleaner Single stage cleaner Centrifugal cleaner Two-stage cleaner

Terminal bars

What bonding equipment utilizes rigid plates that can be used to span a gap to connect two or more components of an electrical system? Exothermic welding Screw type fastener Jumper wire Terminal bars

Jumper wire

What bonding method is used to connect components separated by distance and can be solid, stranded, braided, bare or insulated? Exothermic welding Jumper wire Screw type fasteners Terminal bars

Over advanced timing of the injector

What can "knock"? Incorrect fuel mixture Over advanced timing of the fuel pump Over advanced timing of the injector Improper scavenging

Stores chemical energy and converts into electrical energy

What capability does the battery have? Store electrical energy and converts it to mechanical energy Stores mechanical energy and converts it into electrical energy Stores electrical energy and converts into chemical energy Stores chemical energy and converts into electrical energy

Oil pump

What component moves oil from the oil pan and delivers it throughout the engine? Oil cooler Pressure relief valve Low pressure slip bushing Oil pump

Choke

What component will be used to aid in a cold engine start? (Gas engine) Bernoulli Throttle Choke Venturi

Oil pressure relief valve

What components stabilizes oil pressure at all speeds? Bypass valve Oil cooler Oil pump Oil pressure relief valve

Exciter armature

What exciter component rotates and provides AC voltage to the rectifier components? Exciter armature Exciter rotor Rotor Exciter windings

Atomization

What function of the fuel system breaks up the fuel into smaller particles? Rate of control Atomization Metering Pressurization

Slows down

What happens to air velocity when it passes over the fins of air cooled engines? Stalls Stagnates Speeds up Slows down

Thermostat stuck closed

What is a common cause of a high temperature coolant system malfunction? Thermostat stuck closed Coolant pump not circulating Too much coolant Improper carburetor setting/tuning

Heat loss over distance creates cold pockets

What is a weakness of the direct immersion (coolant type) pre-heating device? Heat loss over distance creates cold pockets If the heater is at or above the water jacket, it will ineffectively heat the engine Must be located by the heater, close enough that the circulating pump will not be overworked Uses diesel fuel as the energy source to heat up the engine coolant

Running out of fuel

What is one cause of air in the fuel lines? Insufficient load on the engine The carburetor running too lean Running out of fuel Spark ignition failure

Nitrogen and water

What is the end product if DEF is used in conjunction with an SCR Catalyst in a diesel exhaust system? Carbon dioxide and ammonia NOx Nitrogen and water Ammonia and urea

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

What is the function of the intake valves? Maintains a constant engine speed, regardless of changes in load demand Regulates the airflow to control the air/fuel mixture entering the intake manifold To control the entry of the air/fuel mixture into the combustion chambers Creates a vacuum drawing in air through the carburetor

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

What is the purpose of a battery? Store electrical energy and convert it into chemical energy when connected to a load Store electrical energy and convert it into mechanical energy when connected to a load Store chemical energy and convert it into electrical energy when connected to a load Store chemical energy and convert it into sound energy when connected to a load

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

What is the purpose of a four stroke diesel engine? Convert the hydraulic energy of burning fuel, into the mechanical energy of an engine Convert the chemical energy of burning fuel into the mechanical energy of an engine Convert the chemical energy of burning fuel into the generator energy of an engine Convert the mechanical energy of burning fuel into the chemical energy of an engine

Provides a mechanical seal between non-rotating parts

What is the purpose of a gasket? Gaskets provide a watertight seal only Provides a thermal and electrical barrier to protect the engine frame Provides a mechanical seal between non-rotating parts Used to prevent exhaust damage to the rectifier ring

To remove unwanted contaminants

What is the purpose of an oil filter? To remove unwanted contaminants To make sure the oil can be recycled To make oil thinner so it will flow faster To make oil, thicker, increasing viscosity

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

What is the purpose of installing engine heating devices? To prevent damage starter motor caused by crank cycle durations To keep the scale from building up in the engine and radiator jackets To prevent damage caused by cold, starts and rapid acceleration to rated RPM To suspend contaminants in the lubrication oil prior to conducting annual maintenance on a generator set

To condition the coolant to minimize scale buildup

What is the purpose of the additive within the coolant filters? To absorb sediments in the coolant for filtration To condition the coolant to minimize scale buildup To suspend sediments in the coolant filtration To harden the coolant and minimize scale buildup

Stores rotational energy to ensure rotation of the crankshaft

What is the purpose of the flywheel? The springs and valves in place Offset the weight of the connecting rod and pistons Control the opening and closing of intake and exhaust valves Stores rotational energy to ensure rotation of the crankshaft

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

What is the purpose of the oil cooler? To raise the oil temperature without losing viscosity To remove excess heat from oil to help retain the lubricating qualities of the oil To keep the oil pressure in most effective range To ensure the oil viscosity stays stable to prevent oil loss

A mixture of water and sulfuric acid

What is used as an electrolyte solution in a lead-acid battery? A mixture of water and sulfuric acid A mixture of hydroxide and boric acid A mixture of hydroxide and sulfuric acid A mixture of water and cadmium

Test strips

What is used to determine if the correct amount of coolant additives exist within a cooling system? Test strips Coolant color Multimeter Hydrometer

Start all fasteners by hand before tightening with tools

What should be done to prevent cross threading? Tap and reverse thread, all fastener holes prior to installing fasteners Use a torque wrench to install all fasteners Completely remove all of the gasket material Start all fasteners by hand before tightening with tools

Blower

What supplies, fresh air to the airbox in a two-stroke diesel engine? Supercharger Auxiliary fuel pump Fuel pump Blower

Reactive

What type of silencer is efficient at mitigating low to mid frequency noise only? Absorptive Resistive Contemplative Reactive

Exhaust

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

Insufficient load

What will cause a generator to wet stack? Insufficient fuel Excessive fuel Excessive load Insufficient load

Will default to a safe maintainer mode

What will occur after connecting the charger and not making a charging quick set selection within 10 minutes? Charging will be disabled until reconnected to a battery Will power off and need to be reset Will begin charging in the fast charge mode Will default to a safe maintainer mode

Exothermic welding

When bonding electrical system components, which of the following methods is appropriate? Exothermic welding Metal inert gas welding Arc welding Tungsten inert gas welding

When the piston uncovers the intake ports

When does the intake event begin on a two-stroke diesel engine? When the piston moves upward When the piston uncovers the intake ports When the blower starts to operate When the piston moves upward and the blower starts to operate

Combustion

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

Only as directed

When should gasket sealant be used? Only as directed Never, use the old gasket with the new gasket to get a better seal When it is convenient Always, as supplement to the gasket

Creates a vacuum

When the piston begins to travel downward in the cylinder, what occurs? (Gasoline engine) Creates a combustion event Ignition occurs Creates a vacuum Injection occurs

Diverts coolant to the expansion tank

When the pressure in the cooling system exceeds the maximum value the radiator cap Routes coolant to the exhaust to be burned Diverts coolant to the ground Diverts coolant to the expansion tank Routes coolant to the intake to be burned

When gravity feed will not be possible or practical

When would a fuel transfer pump be used? Only if in a deployed environment When a glass sediment bowl is connected to the system When gravity feed will not be possible or practical When municipal laws require the installation, or directed from EPA

While offloading fuel into a storage tank

When would static ground be utilized? To stabilize emergency power system voltage While offloading fuel into a storage tank So paralleled generators reference the same ground potential To keep the generator enclosure being energized

Damper windings

Which alternator component(s) help(s) to maintain stable voltage during load changes? Damper windings Voltage regulator Full wave rectifier Exciter armature

Wye

Which alternator connection has three phase leads and a neutral? Split Star Wye Delta

Spray washing

Which common cleaning removal type combines, mechanical force from spray with the reactions of the chemicals used in the solutions? Foamers Spray washing Immersion Hand

Maintainer quick set selector

Which component allows the user to select the battery pre-charge status? Temperature compensation selector LCD charging selector Charging quick set selector Maintainer quick set selector

Starter solenoid

Which component engages the pinion gear MPU The starter The battery charger Starter solenoid

Charging quick set selector

Which component is used to set the required charging profile depending on battery type? Maintainer quick set selector LCD charging selector Charging quick set selector Temperature compensation selector

The start switch and crank relay

Which component of the starting system uses low amperage to operate a high amperage component? The rectifying capacitor The starter The battery charger The start switch and crank relay

Distributor fuel system

Which fuel injection system is designed for applications with relatively broad speed requirements? Electrical fuel injection Cummins pressure time pump Distributor fuel system Port and helix injection pump

Personal and equipment safety

Which grounding principle 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. Voltage circuits Circuit protection Personal and equipment safety Testing requirements

Compound

Which is a temporary protection of painted or unpainted surfaces where the coding system has been damaged or removed? Compound Sealant Paint Both paint and sealant

Sanding

Which mechanical removal type uses abrasive paper to remove light corrosion, not deeply pitted into metal? Wire brushing Scuff sanding Grinding Sanding

Glow plugs

Which method of air preheating functions strictly operates off onboard battery voltage? Heating blankets Forced circulation Direct immersion Glow plugs

Fuel-fired

Which method of coolant pre-heating functions strictly operates off onboard battery voltage? Fuel-fired Force Circulation Direct immersion Thermosiphon

Computing

Which of the following functions of an electronic governing system comes after sensing? Mining Tailoring Acting Computing

Provide alternate current carrying conductor

Which of the following is NOT a reason for bonding equipment? Provide alternate current carrying conductor Ensures electrical continuity and conductivity Facilitate actuation of circuit protection devices Provide equal potential of all metal parts

Fuel efficiency

Which of the following is a major advantage of a diesel engine over gaseous engines? Higher engine speed Fuel efficiency A smaller crankshaft Faster engine response

Driven electrode with a resistance of 5 Ohms

Which of the following is the best example of an equipment ground? Driven electrode with a resistance of 5 Ohms A plastic water pipe with infinite resistance A grounding bracelet with a resistance of 1500 Ohms Buried cable with a resistance value of 26 Ohms

Reverse osmosis

Which of these does not provide a form of fuel filtration? Reverse osmosis Glass sediment bowl Inline paper Screen type

Faulty radiator cap

Which of these will cause a loss of coolant? Faulty radiator cap Loss of prime, from the storage tank An exhaust leak, caused from a sticking Gummed carburetor floats

Absorbed glass mat

Which type of batteries constructed of fine, highly porous microfiber glass separators to absorb the electrolyte? Gel-cell Ni-Cad Absorbed glass mat Lead-acid

Galvanic

Which 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? Galvanic Intergranular Stress Pitting

Medium weight lines

Which type of fuel lines are standard wire-braided hose with an inner lining? Medium weight lines Ultra lightweight lines Lightweight lines Heavyweight lines

Star grounds

Which type of grounding radiates wires horizontally from a central point? Pentagon grids Star grounds Ground loop Ground grids

Fuse

Which type of protective device provides a time delay and must be replaced when actuated? Fuse Magnetic circuit breaker Thermal-magnetic circuit breaker Thermal circuit breaker

Protect personnel, equipment and facility cabling

Why are electrical systems and equipment grounded? Regulate the voltage of the system or power generation equipment Allows additional resistance added to the system for current limiting factors Protect personnel, equipment and facility cabling Provide a paralegal path back to the source during normal operations

Easier to tune and change pre-selected speeds

Why are electronic governors used instead of mechanical? Cheaper and saves time during replacement Easier to tune and change pre-selected speeds Less complex and more practical applications Faster delivery through the injection system

To prevent static electricity from reaching sparking potential

Why are static grounds used? So damage to the alternator doesn't occur during voltage spikes To protect the emergency power system from ground fault currents To prevent static electricity from reaching sparking potential For safeguarding all the sensitive circuit cards in the control panel

The breaker is capable of handling larger overloads

Why would a piece of equipment be equipped with a thermal-magnetic circuit breaker? To occasionally allow for loads to start up without tripping The breaker is capable of handling larger overloads When a slow response is preferred The engine is equipped with a full authority governor