final exam

vapor lock

Under certain conditions, the fuel may vaporize in the lines, pumps, or other units. The vapor pockets formed by this premature vaporization restrict the fuel flow through units which are designed to handle liquids rather than gases.

increase

When adjusting the idle mixture control, pull the mixture control toward IDLE CUTOFF and watch the tachometer. Before the engine dies, the RPM should momentarily________________ (increase or decrease).

open

When the oil temperature is low, the thermostatic bypass valve is ___________( open or closed )

sump

When the pressure produced by an oil pump is greater than that held by the pressure relief valve the excess oil is returned to the _________

Exhaust back pressure

_________________A turbine driven by forces produced by the velocity, rather than the pressure, of gases flowing through the vanes.

one

a double magneto has ________-( one or two ) rotating magnet

secondary winding

winding in a magneto or ignition coil that connects to the distributor rotor.

pressure carburator

A carburetor installed on some aircraft reciprocating engines that uses the pressure difference between air inside the Venturi and ram air entering the carburetor to produce a fuel

Butterfly Valve

A flat, disk-shaped valve used to control the flow of fluid in a round pipe or tube.

Displacement pump

A fluid pump that moves a specific volume of fluid each time it rotates.

Gerotor pump

A form of constant displacement pump that uses an external-tooth drive gear that meshes with and drives an internal-tooth gear that has one more space for a tooth than there are teeth on the drive gear

Float Carburetor

A fuel metering device that uses a float-actuated needle valve to maintain fuel level slightly below the edge of the discharge nozzle.

dipstick

A gage, made in the form of a thin metal rod, used to measure the level of liquid in a reservoir.

vibration loop

A loop in a rigid fluid line used to prevent vibration from concentrating stresses that could cause the line to break.

sump

A low point in an aircraft engine in which the oil collects and is stored or from which it is pumped from the engine into an external tank.

extreme pressure lubricant

A lubricant that reacts with iron to form iron chlorides, sulfides, or phosphides on the surface of a steel part.

Viscosity Index

A measure of change in viscosity of an oil as it changes temperature.

Ashless Dispersant Oil

A mineral oil with nonmetallic dispersant additives that hold the contaminants in suspension, preventing them from clumping together and forming sludge deposits inside the engine.

stand pipe

A pipe which protrudes upward from the base of an oil tank and through which oil used for normal engine lubrication is drawn.

venturi

A specially shaped restrictor in a tube designed to speed up the flow of fluid passing

augmenter

A stainless steel tube through which some of the exhaust gases pass after leaving the tail pipe is called a/an____________ tube

turbo charger

A turbosupercharger that consists of a centrifugal air compressor on the same shaft with an exhaust-driven radial-inflow turbine. Compressed air is directed into the engine cylinders to increase power produced by the engine.

ram air

Air hose pressure has been increased by the forward motion of the aircraft.

IDLE; Main

An acceleration system is needed to provide a momentarily rich mixture to sustain the engine during the time the carburetor is transitioning between the________________ metering system and the _____________ metering system

cam

An eccentric, or lobe, on a rotating shaft that changes rotary motion into linear motion.

wet sump

An engine that carries its lubricating oil supply in a reservoir that is part of the engine itself.

dry-sump system

An engine that carries its lubricating oil supply in a tank external to the engine.

full rich

An engine with a float carburetor is started with the mixture control in the_____________( full rich, lean , or cutoff) position

Zinc

An exhaust system component must be protected from marks made by galvanized metal because the___________ deposits will defuse into the metal and cause cracking

Viscometer

An instrument used to measure the viscosity of a liquid.

color

Carbon monoxide detectors are packets of chemical crystals that change_____________ in the presence of CO

presssure type carburator

Discharges fuel into the airstream at a pressure well above atmospheric.

fluid coupling

Energy extracted from exhaust gases by a power recovery turbine is coupled to the crankshaft through a ______________

Carbon

Exhaust system components must never be marked with a lead pencil because the______________________ in the mark will diffuse into the metal and cause cracking

full rich

Fuel for starting the engine is sprayed into the intake valve chamber by momentarily moving the mixture control to the_____________ position with the boost pump turned on

oil cooler

Heat that is picked up from inside the engine is given up to the outside air that passes through the______________

retareded spark

Ignition sparks for starting an engine, timed to occur later than the normal sparks.

magnetic flux

Lines of magnetic force that are assumed to leave a magnet at its north end and return to its south end.

spring

On a pressure carburetor, when the throttle is suddenly opened, the fuel from the acceleration pump is forced out into the air stream by ________________( a spring or air pressure )

unstable

One of the problems with using animal-base lubricants in aircraft engines is that they become___________________ at high temperature

Gage Pressure

Pressure referenced from existing atmospheric pressure.

finned

Pulsations in the oil pressure gage indication are minimized by the use of a/an________________ in the oil line to the engine

Capacitance

The ability to store an electrostatic charge between two conducting plates separated by a dielectric 8083-4-8

internal timing

The adjustment of the breaker points of a magneto so they will begin to open at the time the magnet is in its E-gap position.

vacuum cleaner

The air pressure used to pressure-check an exhaust system for leaks may be produced by the discharge of a/an._________________

mixture

The amount the idle fuel valve remains off its seat can be adjusted to change the idle_______________( mixture or speed)

venturi

The device in the main metering system that senses the amount of air entering the engine is the________________

red

The flexible ducting used for carrying the heated air from the shroud around the muffler to the carburetor heat box is____________( black or Red)

collector ring

The large pipe into which all exhaust gases from a radial engine flow is called a/an_________

needle valve

The level of fluid in the float bowl is maintained constant by a float-actuated__________________

Viscosity

The measure of the opposition of a liquid to flow is called its____________________

Viscosity Index

The measure of the relationship between the change in the viscosity of a liquid to a change in its temperature is the _________________ of the liquid

tail pipe

The name of the exhaust system component through which exhaust gases leave the aircraft is the___________________

Static RPM

The number of revolutions per minute an aircraft engine can produce when the aircraft is not moving.

Saybolt Universal Seconds

The number of seconds needed for 60 milliliters of oil at a specified temperature to flow through a calibrated orifice.

scavenger

The oil pump in a dry-sump engine that has the greater capacity is the__________( pressure or scavenger ) pump

enters

The oil temperature shown on the instrument in the cockpit is the temperature of the oil as it ___________________( enters or leaves ) the engine

Hopper

The oil warm-up time for an engine having a large-volume oil tank is decreased by having a/an __________ installed inside the tank

exhaust back pressure

The pressure in the exhaust system of a reciprocating engine that opposes the flow of exhaust gases as they are forced out of the cylinders when the exhaust valve is open

ambient air pressure

The pressure of the air that surrounds an object.

kinematic viscosity

The ratio of the absolute viscosity of a fluid to its density. Kinematic viscosity is measured in centistokes.

Viscosity

The resistance of a fluid to flow. Viscosity is the stiffness of the fluid, or its internal friction.

spacer

The size of contaminants that can be trapped by a Cuno filter is determined by the thickness of the ( disk or spacers )

coke

The solid carbon residue left when all volatile parts of a mineral oil have been evaporated by heat.

light

The speed at which a student can leave the building as they are being released for the evening.

flash

The temperature at which an oil gives off enough vapors to ignite and flash, but not continue to burn when a small flame is passed above it, is called the_________________ point of the oil

Flow divider

The valve in an RSA fuel injection system that divides the fuel from the fuel control unit and distributes it to all cylinders

parallel

The variable-orifice mixture control valve is in________________( series or parallel ) with the main meeting metering jet

spray

The wrist pins are lubricated by ________________ (pressure or spray) lubrication

turbocharge and power recovery

Two devices used to recover some of the energy from the exhaust gases are:

joint slip and metal bellow

Two methods of allowing exhaust system components to move relative to each other without leaking exhaust gases are:

wet and dry sump

Two types of lubricating systems based on the oil supply storage are:

cabin heat and carburetor heat

Two uses for some of the heat taken from the exhaust gases are

Bernoulli's principal

When energy is neither added to nor taken from the fluid, any increase in its velocity (kinetic energy) will result in a corresponding decrease in its pressure (potential energy).

Augmentor tubes

_________________________A long, specially shaped stainless-steel tube mounted around the exhaust tail pipe of a reciprocating engine. As exhaust gases flow through the augmentor tube, they produce a low pressure in the engine compartment that draws in cooling air through the cylinder fins.

collector ring

__________________________A ring made of thin corrosion-resistant steel tubing that encircles a radial engine and collects exhaust gases from each cylinder. The ring ends with a connection to the exhaust tail pipe.

Bell mouth

__________________________The shape of the inlet of an augmentor tube that forms a smooth converging duct. The bell mouth shape allows the maximum amount of air to be drawn into the tube.

PRT

______________________________A turbine driven by exhaust gases from several cylinders of a reciprocating engine. Energy extracted from exhaust gases by the turbine is coupled, through a fluid clutch, to the engine crankshaft.

Volume

a float carburetor meters the fuel on the basis of the ______________(volume or mass) of the air entering the engine

intermittent

a starter solenoid is a ______________( continuous or intermittent ) duty device

internal timing

adjustment of the breaker points of a magneto so they will begin to open at the time the magnet is in its E-gap position.

idle cutoff

an engine equipped with an RSA fuel injection system is started with the mixture control ________________( lean, rich , or idle cutoff ) position

fifty

approximately _________ ( what percent of the heat energy is fuel burned is lost out the exhaust system

Flashover

can lead to carbon tracking which appears as a fine pencil like line on the unit across flashover occurs 8083-4-7

are not

detergent oil _________( are or are not ) one of the more popular lubricants for us in modern aircraft engine

armature

electric motor with field coils connected in series with the armature.

timing light

indicator light used when timing magnetos to an engine to indicate when the breaker points open.

disposable

most modern aircraft reciprocating engine use__________ ( cleanable or disposable oil filters

internal timing

position of the rotating magnet in a magneto when the breaker points are timed to open.

reduces friction seals and cushions removes heat cleans inside of engine protects against corrosion preformes hydraulic action.

six function of the lubrication system in a reciprocating engine are

impulse coupling

spring-loaded coupling between a magneto shaft and the drive gear inside the engine, used to roduce a hot, late spark for starting the engine.

Inertia Starter

starter for a large reciprocating engine that uses energy stored in a rapidly spinning flywheel to in the crankshaft.

richer

the correct idling mixture ratio is slightly ________________( richer or leaner) than the prefect mixture ratio

lowest

the discharge nozzle is located near the narrow portion of the Venturi where the pressure is _____________( highest or lowest )

does not

the main electrical circuit for a starter motor ____________( does or does not ) have a fuse or circuit breaker

carbon track

trail of carbon deposited by an arc across a high-voltage component such as a distributor block.

excessive noise and exhaust valve

two problems caused by short exhaust stack are

overrunning clutch

type of clutch that couples an input shaft with an output shaft. When the input shaft is driven, the output shaft rotates with it. But when the output shaft is driven, the input shaft does not turn

Injector Pump

vapors are separated from the fuel in a CMG fuel injection system in the _________________