AV105

Match the following refinery outputs as percentage of total output 1. car gas 2. diesel 3. 100ll avgas

1. 50% 2. 20% 3. 0.25%

AC flows in alternating directions.AC is used is larger aircraft.DC is used by batteries.

1. AC 2. AC 3. DC

Crankshafts are balanced for

1. Dynamic balance 2. Static Balance

1. Weight 2. Density 3. Gravitation 4. Mass

1. Name commonly used for the gravitational force of attraction between the earth and body of mass near surface 2. the quantity which is useful when describing matter, especially in the liquid or gaseous state 3. Sometimes called mass attraction, results from characteristics of particles 4. is the measure of inertia of a body, therefore is the measure of the quantity of matter associated

1. Newton's first law of motion: 2. Newton's second law of motion: 3. Newton's third law of motion: 4. Vibration

1. Object at rest tends to stay at rest, object in motion tends to stay in motion 2. when forces act upon a body, momentum of body can be changed 3. For every action, there is an equal opposite reaction 4. indicates periodic, continuing motion, usually of a solid object

Where are some places you can find out what fuel grade to use in your aircraft?

1. POH Section 2 - Limitations 2. Placard by fuel cap 3. Type Certificate Data Sheet

Which of the following are characteristics of a Float Carburetor?

1. Uneven fuel-air mixture distribution 2. Metering of air volume, not mass 3. Affected by gravity (attitude critical) 4. Susceptibility to icing

A waste gate is typically opened using [ Select ] ["vacuum", "oil pressure", "magnets", "a spring"] and closed using [ Select ] ["a spring", "vacuum", "magnets", "oil pressure"] .

1. a spring 2. oil pressure

Static electricity is caused by [ Select ] ["Aircraft wheels rolling on runway", "The alternator", "Aircraft moving through the air"] and is discharged using [ Select ] ["The Alternator Control Unit", "The Battery", "Static Wicks", "Sticky Wicks"]

1. aircraft moving through air 2. static wicks

1. exhaust valve 2. intake valve 3. bore 4. stroke 5. top dead center 6. bottom dead center

1. allows for the escape of burning gasses 2. lets in the fresh charge of fuel/air mixture 3. inside diameter of the cylinder 4. distance the piston moves from one end of cylinder to the other 5. crankshaft is at very top of of rotation 6. crankshaft is at very bottom of rotation

1. Straight Roller bearings 2. bearings 3. Ball bearings

1. are used where the bearings is subjected to radial loads only 2. any surface which supports or is supported by another surface 3. are used for supercharger impeller shaft bearings and rocker arm bearings

1. Inertia 2. Momentum

1. based on mass, exist with or without momentum 2. bases on mass and velocity, only exist with momentum

If oil viscosity is too high it might be too think and sludgy and if it is too low it might be too thin to protect parts .

1. be too think and sludgy 2. be too thin to protect parts

Match the following air to fuel ratios: 1. 16:1 2. 15:1 3. 12:1 4. 18:1 5. 8:1

1. best economy 2. stoichiometric 3. best power 4. lean limit 5. rich limit

1. Hypoxic Hypoxia 2. hypemic hypoxia 3. stagnant hypoxia 4. histotoxic hypoxia

1. cause by an insufficient particle pressure of oxygen in the inspired air 2. hypoxia caused by a reduction in the oxygen carrying capacity of blood 3. oxygen deficiency in the body due to poor circulation of blood 4. hypoxia cause by the inability of body cell to utilize oxygen

1. Valve-operating mechanism 2. Valve Lift 3. Valve duration 4. Cam lobes

1. controls timing of the valve 2. distance the valve is lifted off its seat 3. length of time valve is held open 4. determines both valve lift and valve duration

1. baffles 2. cowl flaps 3. Augmenters

1. designed to force air over the cooling fins 2. open/ close to change the cool air inflow 3. Use exhaust gas velocity to draw in cool air

1. respiration 2. inspiration 3. expiration 4. external respiration 5. internal respiration

1. exchange of gasses between organism and its environment 2. active phase of lung ventilation 3. passive phase resulting from relaxation of chest muscles 4. exchange of gasses between lungs and surrounding atmosphere 5. exchange of gasses between blood and body cells

Amps represents flow or current and uses the symbol I

1. flower or current 2. I

Match the four-strokes of reciprocating engine to the statement that best describes each. 1. intake 2. compression 3. power 4. exhaust

1. fuel/ air mixture passes through intake manifold pipes and intake valves 2. the upward travel of the piston compresses the fuel/air mixture to obtain the desired burning and expansion characteristics. 3. the piston is pushed downward by the rapid expansion of the burning gases within the cylinder head. 4. the piston travels upward to push burned gasses out

1. Solid 2. Liquid 3. Plasma 4. Gasses

1. have definite volume and definite shape 2. have definite volume but takes shape of container 3. made up of very hot ionized gasses 4. neither have definite volume or shape

1. decompression 2. explosive decompression 3. rapid decompression 4. air embolism

1. inability of the aircrafts pressurization system to maintain 2. change in cabin pressure faster than lungs can decompress 3. change in cabin pressure where lungs CAN decompress faster than the cabin 4. air bubbles entering blood

1. dysbarism 2. daltons law 3. grahams law 4. partial pressure 5. henrys law

1. indicates any physiological disorder brought on by changes in pressure 2. total pressures of a mixture of gasses equal to sum of pressures 3. gas of high pressure exerts a force toward a region of lower pressure 4. pressure of each gas in the mixture of gasses 5. amount of gas varies directly with the pressure of gas over a solution

Protons are about the same size as [ Select ] ["Electrons", "Neutrons"] and have a [ Select ] ["Positive", "Neutral", "Negative"] charge.

1. neutrons 2. positive

For most creatures on earth, respiration means oxygen absorbed into the body and elimination of carbon dioxide .

1. oxygen 2. carbon dioxide

Match the following characteristics with either Pre-Ignition or Detonation or Both: occurs prior to the spark event. Detonation occurs after to the spark event. [ Select ] ["Detonation", "Both", "Pre-Ignition"] can cause engine wear/damage. Detonation likely to cause very rapid engine damage & failure. Both will cause a reduction in power.

1. pre-ignition 2. detonation 3. both 4. pre-ignition 5. both

Neutrons are about the same size as [ Select ] ["Electrons", "Protons"] and have a [ Select ] ["Neutral", "Positive", "Negative"] charge.

1. protons 2. neutral

If you are experiencing reduced power, rough running and high EGT/CHT and suspect possible detonation as the cause, what should you do?

1. reduce climb angle 2. reduce power 3. full-rich mixture

Match the following types of horsepower to the statements that best describes their meaning. 1. thrust horsepower 2. friction horsepower 3. brake horsepower 4. indicated horsepower

1. result of the engine and the propeller working together 2. horsepower used in engine overcoming the friction of moving parts, drawing in fuel, driving oil 3. power delivered to the propeller for useful work 4. power developed in the combustion chambers without reference to friction loss

Electrons are [ Select ] ["About the same size as", "Larger than", "Smaller than"] Protons and have a [ Select ] ["Negative", "Neutral", "Positive"] charge.

1. smaller than 2. negative

Match the piston engine parts with the type of metal commonly used to make them. 1. Cylinder barrels 2. intake valves 3. exhaust valves 4. cylinder heads

1. steel alloy 2. chrome-nickel steel 3. nichrome, silchrome, cobalt- chromium steel 4. cast or forged aluminum alloy

1. flash point 2. fire point 3. cloud point 4. pour point

1. temp to give off ignitable vapors 2. temp at which sufficient vapors to support a flame 3. temp begins to solidify- appear hazy or cloudy 4. lowest temp oil can be poured

Match the following propeller terms to the statements that best describe or define them. 1. back 2. face 3. leading edge 4. chord

1. the cambered or curved side of blade, similar to upper surface of blade wing 2. the flat Side of propeller blade 3. thick edge of blade that meets air as prop rotates 4. imaginary line drawn through blade

Which of the following are typical byproducts of aviation gasoline combustion?

1. water vapor 2. carbon monoxide

1. thermal efficiency 2. Mechanical efficiency 3. volumetric efficiency

1.is the ratio of useful work done 2. comparison between BHP and IHP 3. comparison of the volume of fuel/ air charge

On modern aircraft engines, fiction horsepower (FHP) may be as high as what percentage of the indicated horsepower?

10%- 20%

Constant speed propellers have manufacturer recommended TBO's (time between overhaul) just like aircraft engines. According to the book, a typical TBO might be

1500 hours or 5 years, whichever comes first.

After any SCUBA diving the waiting time before going to flight altitudes above 8,000 ft. should be at least

24 hours

What is Dysbarism?

Any medical condition resulting from changes in ambient pressure

The thermocouple that connects to the cylinder is one of what two types?

Bayonet or gasket

In an engine, a lubricant serves many purposes, select all that apply.

Cushion shock-loading parts, create a gas seal, reduce friction, take away heat, clean (pick up particles)

What is the purpose of the "spider" in a fuel injection system?

Distributes fuel evenly to all cylinders

What indicator is used to properly adjust the fuel to air ratio (mixture) for cruise flight?

EGT

If you have EGT and CHT instrumentation, why should you use EGT not CHT for leaning?

EGT reacts faster

Due to it's simplicity, splash lubrication is the most common form of oil lubrication for general aviation engines.

False

If an airplane or helicopter is in a stable standard rate turn around a point (3 degrees a second) at a steady 90 knots, there is no acceleration happening.

False

Ignition in a 4 stroke occurs exactly at Top Dead Center (TDC).

False

The pilot must keep the aircraft engine within the limitations established by the manufacturer. What indicators most be frequently monitored in order to always insure operation is within those limitations?

Oil pressure and temperature, cylinder head temperature and EGT, RPM, MAP and fuel flow

A dynamic damper is a pendulum fastened to the crankshaft free to move in a small arc. When the vibration frequency of the crankshaft occurs, the pendulum oscillates out of time with the crankshaft vibration, reducing vibration to a minimum.

True

Inertia is the characteristic of matter that resists change in motion (velocity and direction).

True

Most aircraft engines are air cooled.

True

Static friction of an object is always greater than sliding/rolling friction.

True

What is valve overlap?

When both intake and exhaust valves are open at the same time

What force(s) tend to twist the blade to decrease blade angle?

aerodynamic forces

The use of carburetor heat will cause the fuel-air mixture to:

become richer

In turbocharger systems, the pressure between the compressor and the engine throttle valve is known as

deck pressure

What unit in a typical turbocharger system limits maximum MAP, thus preventing Overboost by limiting the deck pressure while the aircraft is below the turbocharger's critical altitude?

density controller

The Lycoming O-320-E2D/D2J & O-360-J2A engines are used in the Cessna 172M/N and Robinson R22 helicopter. Select all that apply:

direct drive, Carbureted, naturally aspirated, Horizontally opposed cylinder configuration, Dual magnetos and 8 spark plugs

What is a very small electrically charged particle that exists as a part of every atom?

electron

Critical pressure, is the pressure at which a fuel under compression will:

explode

A lubricant (oil) primary purpose in the engine is to pick up particles (clean) to reduce abrasive wear on components.

false

An ion is an atom with a balanced charge.

false

At cruise altitudes the pressurized air is usually too cold for the cabin and needs to be heated using the exhaust shroud.

false

Cabin pressure changes are controlled by increasing or decreasing the flow of incoming air into the cabin.

false

Dues to the complexity of the task and possible engine damage, wastegate control is always an automatic system.

false

Most constant speed propellers on single engine airplanes will automatically feather when the engine quits.

false

There is no regulation on what information must be stamped onto a propeller.

false

To minimize internal engine stresses, it is best to make throttle, mixture and propeller control changes as quick as possible.

false

Water in a fuel sample will show up as bubbles/beads floating on top of the fuel.

false

When in a prolonged glide it is best to clear any fouling of plugs and keep the carb heat working by a quick 1 second burst to full throttle and back to idle.

false

Multi-engine aircraft typically use which of the following to feather a propeller if an engine quits?

feathering spring

High viscosity means

hard to flow

Which Greek letter is used to represent propeller efficiency?

hn (eta)

Compressing air using a turbocharger or supercharger tends to

increase air temperature

Rubber is a good example of a insulator material

insulator

What part a turbocharger system cools the intake air by passing through a 'radiator'?

intercooler

Energy due to motion is known as

kinetic energy

Overboost is when an engine exceeds it's

manifold pressure limit

It is generally considered safest and better for the engine to shut down an engine by using

mixture cutoff

Bearings are required to take

radial loads, thrust loads, or a combination of or the two.

What is the difference between actual distance prop travels forward versus the distance it should theoretically travel?

slip

_____________ are driven directly from the engine and usually compress the fuel/air mixture after it leaves the carburetor.

superchargers

Sliding Friction is

the resistance to motion offered by an object sliding over a surface.

Which force bends the propeller blades opposite to the direction of rotation?

torque bending force

2 stroke engines complete their cycle in one revolution of the crankshaft and in 4 stroke engines it takes 2 revolutions.

true

Below critical altitude, bootstrapping is reduced by the Differential Pressure Controller.

true

Energy can be defined as the ability to do work and can be measured in ft-lbs or Joules.

true

Gastrointestinal pain caused by expanding gases in the stomach and intestines is usually only apparent during a climb and not a descent.

true

In a 4 stroke cycle, there is a time where both intake and exhaust valves of a cylinder are both open at the same time.

true

In order to get better anti-detonation characteristics, the fuel additive tetraethyl lead (a heavy, oily, poisonous liquid) is added to the fuel.

true

In-line engines mounted in the nose of an aircraft give a pilot better visibility if installed inverted.

true

Some of the advantages of leaving the propeller in the 10/4 o'clock position are: Less likely to have corrosive bird poop Minimizes open intake & exhaust valves

true

The cooling fins on a gallon-sized cylinder can increase the effective cooling area to that of a barrel.

true

The timing of the valve and ignition events is always specified in degrees of crankshaft travel.

true

Using lower octane rating fuel than your engine is rated for can cause detonation.

true

Valves are usually closed by two or three springs.

true

When the engine is not running, if the instrument is without error, the MAP gage should indicate ambient pressure.

true

_____________ are driven by the hot, high velocity exhaust gasses and usually compress intake air before it is mixed fuel.

turbochargers

What is the most important property when selecting an oil for aircraft reciprocating engines?

viscosity

What is the unit of electrical pressure?

volt