Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
196 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
What is the most important law applicable to the study of electricity?
|
Ohm's Law (E=IxR)
|
(E=IxR)
|
|
|
What are the elements of Ohm's Law?
|
Voltage (R) Current (I) Resistance (R)
|
|
|
|
What are the four sources of electrical power?
|
Mechanical (generator or alternator) Chemical (battery) Photoelectric (light) and Thermal (heat)
|
|
|
|
What does an electrical circuit consist of?
|
1. A source of electrical pressure (EMF). 2. Resistance in the form of an energy consuming electrical device (light bulb). 3. Conductors to provide a path for electron flow (wire).
|
|
|
|
What represents capacitance in an AC circuit?
|
A capacitor (same as a condenser)
|
|
|
|
What is the function of a capacitor?
|
To store electricity
|
|
|
|
What is inductance?
|
When the voltage is induced by magnetic flux line in a coil in an AC circuit. The induced voltage is opposite in direction to the applied voltage, and opposes any chance in the alternating current.
|
|
|
|
What is impedance?
|
The total opposition for AC to flow caused by the combined effect of resistance, inductive reactance, and capacitive reactance in an AC circuit.
|
|
|
|
What is the unit of measurement of power in a DC circuit?
|
The watt. Amperes times volts equals watts (P=IxE). 746 watts equals one horsepower
|
|
|
|
What is a kilowatt?
|
It is 1,000 watts
|
|
|
|
In a DC circuit, what occurs when voltage is increased while resistance remains constant?
|
There will be an increase in current
|
|
|
|
What are three types of DC electrical circuits?
|
They are Series circuits, Parallel circuits, and Complex circuits (series and parallel)
|
|
|
|
A 24 volt lead-acid battery has how many cells?
|
It has 12 cells. Each cell rated at 2 volts
|
|
|
|
What should be the specific gravity of the electrolyte in a fully charged lead acid battery?
|
It should be between 1.275 and 1.300.
|
|
|
|
What instrument is used to determine the specific gravity of the electrolyte in a lead acid battery
|
A hydrometer
|
|
|
|
Why can a hydrometer NOT be used to determine the charge of a Ni-cad battery?
|
The specific gravity of the electrolyte is a Ni-cad battery does not change appreciably during charge or discharge of the battery
|
|
|
|
When using a hydrometer to check the charge of a lead-acid battery, at what temperature must a correction factor be applied?
|
Adjustments must be made if temperature of the electrolyte is about 90 degrees Fahrenheit or below 70 degrees Fahrenheit
|
|
|
|
What is electromagnetic induction?
|
It is the transfer of electrical energy by means of a magnetic field (lines of flux). Transferring voltage from one conductor to another without physically touching. This is the principle of transformer operation.
|
|
|
|
How are battery compartments protected against corrosion?
|
They are coated with special corrosion resistant paint such as bituminous paint
|
|
|
|
What should be the correct electrolyte level in a properly serviced battery?
|
It should be approximately 3/8 inches above the plates. If the battery has baffle plates above the cell plates, the electrolyte level should be to the hole in the baffle plate in each cell.
|
|
|
|
What are paralleling generators and how is the load distributed?
|
This is when two or more generators are operated at the same time to supply power for a load that must be shared equally.
|
|
|
|
Describe a no-trip circuit breaker (trip free)
|
A "Trip Free" breaker makes it impossible to manually hold the circuit closed when excessive current is flowing. (It pops when circuit gets hot and can't be reset until it has cooled off.)
|
|
|
|
Can you store Ni-cad and Lead-acid batteries together?
|
No, the fumes from the Lead-acid battery can contaminate the electrolyte in the Ni-cad battery.
|
|
|
|
What type of lines are used on aircraft drawings to indicate hidden views, center lines, and alternate position lines?
|
A hidden view line is a medium width line made up of short dashes. It represents and edge that cannot be seen when looking at the part from a specific position. Center lines are thin lines composed of alternating long and short dashes, and are used to indicate the center of an object or center of a void. Alternate position lines are medium width lines composed of one long and two short evenly spaced dashes. They are used to show the alternate position of apart or the relative position of a missing part.
|
A
|
|
|
Define "tolerance" as used in aircraft drawings
|
The difference between the plus and minus allowable dimensions of a part. (+ & - of .005 = .010)
|
|
|
|
Define "clearance" as used in aircraft drawings
|
Clearance is the dimension given for the space between parts
|
|
|
|
What information is given in the title block of a blueprint?
|
The drawing number, the name of the part or assembly, the scale, the date, the name of the firm, the name of the draftsman, the checker, and the approving official
|
|
|
|
Why are dimensions used, and how are they shown on the aircraft drawings
|
Dimensions are solid narrow lines, broken at midpoint for the insertion of measurement. They are used to indicate the size of an object
|
|
|
|
How can a change to an aircraft drawing be identified?
|
By it's revision letter (A, B, C, etc...). The revision letters are usually listed in a table next to the title block or in the corner of the drawing.
|
|
|
|
What is the "bill of materials" associated with aircraft blueprint?
|
It is a list of materials and parts necessary for fabrication or assembly of a component or system.
|
|
|
|
Why are symbols used when drawing aircraft blueprints?
|
Symbols are a type of shorthand used in drawings. They express the characteristics of a component with a minimum amount of drawing or writing
|
|
|
|
How many views are required to determine the shape of an object?
|
Three views: Front, Top and Right side.
|
|
|
|
What is the datum and it's purpose when making weight and balance computations?
|
It is an imaginary vertical line or plain which all measurements are taken both forward and aft to determine the relative location of items in the aircraft. The datum location is always specified by the manufacture and can be found in the TCDS.
|
|
|
|
What is the purpose of weight and balance control?
|
For safety and efficiency on flight.
|
|
|
|
Why do some manufactures specify an empty C.G. even though the aircraft is not operated at this empty weight?
|
When the empty weight C.G. falls within the empty weight C.G. range, it is unnecessary to perform a weight and balance check if standard loading and seating arrangements are used.
|
|
|
|
Why must the aircraft category be considered when computing weight and balance?
|
Some aircraft are certified in both normal and utility categories. This means a different maximum allowable gross weight depending on which category the aircraft will be operated in for the day. (Two different useful load calculations.
|
|
|
|
When computing weight and balance, what is the "moment" and how is it obtained?
|
A moment is a force which tends to rotate the aircraft about one of its axis. It is obtained by multiplying the weight of an item (pounds) by the distance of the item from the datum (inches). It is expressed in "in-pounds"
|
|
|
|
What is the "arm" of an item and how is it obtained?
|
The arm is the distance (in inches) an item is located either forward or aft of the datum. It is obtained either by actual measurement or from the aircraft weight and balance records.
|
E
|
|
|
What is "tare weight", and how is it handled when making weight and balance calculations?
|
"Tare" is the weight of extra equipment used for weighing the aircraft such as chokes, blocks, jacks, and chains. Tare weight must be subtracted from the scale readings in order to obtain the Empty Weight of the aircraft.
|
|
|
|
What is meant by "minimum fuel" and how is it calculated for weight and balance?
|
Minimum fuel is the amount of fuel that should be used in weight and balance computations when the aircraft is loaded for an extreme condition check. For. Reciprocating engine airplane certified under FAR Part 23, this is the fuel necessary to operate the engine(s) for one half hour at maximum continuous power.
|
|
|
|
What is meant by "residual" fuel?
|
It is the fuel remaining in the tanks, sumps, lines, and engine after fuel exhaustion. Also called "untrainable" or "unusable". It is part of the aircraft's empty weight.
|
|
|
|
How would you determine the empty weight and empty weight C.G. of an aircraft if all weight and balance records are missing?
|
Reweigh the aircraft and calculate new weight and balance records.
|
|
|
|
What is ballast?
|
Ballast can be lead bars, metal plates, shot bags, sand bags, or other items of weight which are placed in the aircraft to attain a desired C.G. location
|
|
|
|
What is the difference between fixed wing and rotor wing (helicopter) aircraft C.G. ranges?
|
The C.G. location in a helicopter is much more critical than fixed-wing aircraft (forward, aft, port and starboard must be calculated). The C.G. range in some helicopters will be less than three inches
|
|
|
|
When weighing an aircraft to determine the empty weight C.G., what must you do with regard to the fixed equipment which is normally carried in the aircraft?
|
All operations equipment, whether it is required, optional, or special equipment, must be included in the aircraft's empty empty weight.
|
|
|
|
What are aircraft plumbing lines usually made of?
|
Metal tubing or flexible hose and fittings.
|
|
|
|
What are the two kinds of flares used in aircraft in aircraft plumbing system?
|
A single flare and a double flare.
|
|
|
|
What is the advantage of flexible Teflon hose over rubber hose?
|
Teflon hoses have better resistance to chemicals and a higher strength properties at higher temperatures
|
|
|
|
What precaution should be taken when deburring and inspecting the flared end of a tube?
|
Care should be taken that the tubing is not cracked or that the wall thickness is not reduced by the deburring process
|
|
|
|
What is a suitable nondestructive testing method for detecting surface cracks on aluminum castings and forgings?
|
The dye pen
|
|
|
|
How is metal tubing sized?
|
By outside diameter and wall thickness. OD is measured fractionally in sixteenth of an inch
|
|
|
|
What precautions should be taken when routing fluid lines adjacent to electrical wiring?
|
Route the fluid lines below the electrical wiring and maintain a clearance of at least 6 inches whenever possible. In no case should fluid lines and electrical wiring be closer than one-half inch. Ensure that both the wiring and the fluid lines are fastened to the aircraft structure by clamps or other methods that will maintain the separation.
|
|
|
|
What is the purpose of the identification stripe running along the length of a flexible hose?
|
The stripe is called a lay line and indicates if the hose has twisted during installation. There is no allowable twist.
|
|
|
|
How are standard AN type and AC type fluid line fittings identified?
|
AN fluid line fittings are colored either blue or black while AC type fittings are usually gray or yellow. AN fitting have coarser threads and they have a small shoulder between the threads and the 37 degree flare cone. The AC fittings are completely threaded all the way up to the 35 degree flare cone.
|
|
|
|
What is the purpose of using quick disconnect coupling in fluid systems?
|
They provide a means of quickly disconnecting a line without a loss of fluid or air entering the system. Quick disconnect couplings are installed at locations where frequent uncoupling of the line is required for inspection and maintenance. Each half has a valve that is open when coupled together and spring loaded to close when disconnected.
|
|
|
|
How is flexible hose sized?
|
By the inside diameter in sixteenths of an inch increments
|
|
|
|
How much slack must be left in a flexible hose during installation
|
Five to eight percent of the total hose length must be allowed for freedom of movement under pressure
|
|
|
|
What are the three parts of a Military Standard (MS) tube fitting?
|
The body, the sleeve, and a nut.
|
|
|
|
What will be the result of over tightening a flare-less tube fitting?
|
The compression sleeve's cutting edge will cut too deeply into the tube and cause the tube to be weakened. Flare-less fitting are made up of the tube, compression sleeve, and nut.
|
|
|
|
What are two kinds of flares used in aircraft plumbing systems?
|
A single flare and a double flare.
|
|
|
|
What is the advantage of flexible Teflon hose over rubber hose?
|
Teflon hoses have better resistance to chemicals and a higher strength properties at higher temperatures.
|
|
|
|
What precaution should be taken when deburring and inspecting the flared end of a tube?
|
Care should be taken that the tubing is not cracked or that the wall thickness is not reduced by the deburring process
|
|
|
|
What are two kinds of flares used in aircraft plumbing systems?
|
A single flare and a double flare.
|
|
|
|
What is the advantage of flexible Teflon hose over rubber hose?
|
Teflon hoses have better resistance to chemicals and a higher strength properties at higher temperatures.
|
|
|
|
What precaution should be taken when deburring and inspecting the flared end of a tube?
|
Care should be taken that the tubing is not cracked or that the wall thickness is not reduced by the deburring process
|
|
|
|
What is a suitable nondestructive testing method for detecting surface cracks on aluminum castings and forgings?
|
The dye penetrate inspection method detects surface cracks with equal success on aluminum, magnesium, brass, copper, and titanium. It can also be used on ceramics, plastics, and glass.
|
|
|
|
What as the steps for solution heat treating aluminum alloy?
|
The alloy must be heated to a predetermined temperature, heat soaked for a specified period of time, and then rapidly quenched to a relatively low temperature.
|
|
|
|
In what state is aluminum alloy immediately after solution heat treating and quenching?
|
The alloy is in a comparatively soft state, so the material must be naturally aged or precipitation-hardened.
|
|
|
|
What is done to prevent certain aluminum alloy rives (D and DD) from becoming hard after heat treating and quenching?
|
The rivets are stored in a refrigerator at a temperature lower than 32 degrees Fahrenheit. The rivets will remain soft for several days. They are also called "ice box rivets"
|
|
|
|
What are the characteristics of a cold weld?
|
SA cold weld has improper penetration and cold laps caused by insufficient heat. It appears rough and irregular and it's edges are not feathered into the metal base.
|
|
|
|
What tools are used to measure the outside dimensions of shafts, thickness of sheet metal stock diameter of drills, and for many other similar applications?
|
Outside micrometer, caliper, or dial caliper
|
|
|
|
What should be used to make a visual inspection of a weld?
|
A magnifying glass of at least ten power
|
|
|
|
Name some types of non-destructive testing used on non-ferrous materials
|
Eddy current, dye penetrate, x-ray, coin tap, and visual inspection
|
|
|
|
List the steps in a dye-penetrate inspection.
|
1. Thoroughly clean the materials surface.
2. Apply the penetrate for the specified dwell time. 3. Remove the penetrate with a water or emulsifying cleaner. 4. Dry the part 5. Apply the developer 6. Insect the results |
|
|
|
Describe the procedure for performing a magnetic particle inspection.
|
Thoroughly clean all grease, oil, and dirt from the metal part which must be of ferrous material such as iron or steel. Magnetize the part then apply the ferromagnetic particles, either gel in liquid suspension or in a dry powder form, to the area to be inspected. If a discontinuity is present, the magnetized particles will form a pattern in the approximate shape of the discontinuity.
|
|
|
|
What is the general rule for using self-locking nuts?
|
Do not use self-locking nuts at joints which are subject to rotation.
|
|
|
|
What type of cable is used in primary control systems?
|
Extra flexible 7x19 cable
|
|
|
|
How can the correct "grip length" of a volt be determined?
|
Generally speaking, the grip length should equal the total thickness of the materials being joined together. The grip of a bolt is the unthreaded portion of the bolt shank.
|
|
|
|
What is the smallest cable that can be used in primary control system?
|
Federal regulations state the no cable smaller than 1/8 inch in diameter may be used for this purpose.
|
|
|
|
What should be the depth of penetration when making a fillet weld?
|
Penetration should be 25 - 50 percent of the thickness of a base metal.
|
|
|
|
What should be the width of the weld bead and depth of penetration when making a butt weld?
|
The bead width should be 3 to 5 times the thickness of the base metal and there should be 100 percent penetration.
|
|
|
|
What system is used to identify AN type aircraft bolts.
|
Aircraft bolts have code markings on the bolt head a for identification. Bold diameter is measured in 16th of an inch and length is measured in 8th of an inch increments
|
|
|
|
What is a suitable nondestructive testing method for detecting surface cracks on aluminum castings and forgings?
|
The dye penetrate inspection method detects surface cracks with equal success on aluminum, magnesium, brass, copper, and titanium. It can also be used on ceramics, plastics, and glass.
|
|
|
|
What as the steps for solution heat treating aluminum alloy?
|
The alloy must be heated to a predetermined temperature, heat soaked for a specified period of time, and then rapidly quenched to a relatively low temperature.
|
|
|
|
In what state is aluminum alloy immediately after solution heat treating and quenching?
|
The alloy is in a comparatively soft state, so the material must be naturally aged or precipitation-hardened.
|
|
|
|
What is done to prevent certain aluminum alloy rives (D and DD) from becoming hard after heat treating and quenching?
|
The rivets are stored in a refrigerator at a temperature lower than 32 degrees Fahrenheit. The rivets will remain soft for several days. They are also called "ice box rivets"
|
|
|
|
What are the characteristics of a cold weld?
|
SA cold weld has improper penetration and cold laps caused by insufficient heat. It appears rough and irregular and it's edges are not feathered into the metal base.
|
|
|
|
What tools are used to measure the outside dimensions of shafts, thickness of sheet metal stock diameter of drills, and for many other similar applications?
|
Outside micrometer, caliper, or dial caliper
|
|
|
|
What should be used to make a visual inspection of a weld?
|
A magnifying glass of at least ten power
|
|
|
|
Name some types of non-destructive testing used on non-ferrous materials
|
Eddy current, dye penetrate, x-ray, coin tap, and visual inspection
|
|
|
|
List the steps in a dye-penetrate inspection.
|
1. Thoroughly clean the materials surface.
2. Apply the penetrate for the specified dwell time. 3. Remove the penetrate with a water or emulsifying cleaner. 4. Dry the part 5. Apply the developer 6. Insect the results |
|
|
|
Describe the procedure for performing a magnetic particle inspection.
|
Thoroughly clean all grease, oil, and dirt from the metal part which must be of ferrous material such as iron or steel. Magnetize the part then apply the ferromagnetic particles, either gel in liquid suspension or in a dry powder form, to the area to be inspected. If a discontinuity is present, the magnetized particles will form a pattern in the approximate shape of the discontinuity.
|
|
|
|
What is the general rule for using self-locking nuts?
|
Do not use self-locking nuts at joints which are subject to rotation.
|
|
|
|
What type of cable is used in primary control systems?
|
Extra flexible 7x19 cable
|
|
|
|
How can the correct "grip length" of a volt be determined?
|
Generally speaking, the grip length should equal the total thickness of the materials being joined together. The grip of a bolt is the unthreaded portion of the bolt shank.
|
|
|
|
What is the smallest cable that can be used in primary control system?
|
Federal regulations state the no cable smaller than 1/8 inch in diameter may be used for this purpose.
|
|
|
|
What should be the depth of penetration when making a fillet weld?
|
Penetration should be 25 - 50 percent of the thickness of a base metal.
|
|
|
|
What should be the width of the weld bead and depth of penetration when making a butt weld?
|
The bead width should be 3 to 5 times the thickness of the base metal and there should be 100 percent penetration.
|
|
|
|
What system is used to identify AN type aircraft bolts.
|
Aircraft bolts have code markings on the bolt head a for identification. Bold diameter is measured in 16th of an inch and length is measured in 8th of an inch increments
|
|
|
|
What are the steps for solution heat treating aluminum alloys?
|
The alloy must be heated to a predetermined temperature, heat soaked for a specific period of time, and then rapid quenched to a relatively low temperature
|
|
|
|
In what state is aluminum alloy immediately after solution heat treating and quenching?
|
The alloy is in a comparatively soft state, so the material must be naturally aged or precipitation-hardedened
|
|
|
|
What is done to prevent certain aluminum alloy rived (D and DD) from becoming hard after heat treating and quenching?
|
The rivets are stored in a refrigerator at a temperature lower than 32 degrees Fahrenheit. The rivets will remain soft for several days. They are also called "ice box rivets"
|
|
|
|
What are the characteristics of a cold weld?
|
SA cold weld has improper penetration and cold laps caused by insufficient heat. It appears rough and irregular and its edges are not feathers into the metal base.
|
|
|
|
What tools are used to measure the outside dimensions of shafts, thickness of sheet metal stock diameter of drills, and for many other similar applications?
|
Outside micrometer, caliper, or dial caliper
|
|
|
|
what should be used to make a visual inspection of a weld?
|
A magnifying glass of at least ten power.
|
|
|
|
Name some types of non-destructive testing used on non-ferrous materials.
|
Eddy current, dye penetrate, x-ray, coin tap, and visual inspection
|
|
|
|
What is the procedure for extinguishing an induction system fire that occurs during starting of a reciprocating aircraft engine?
|
If an engine induction fire develops, continue cranking and start the engine, this will suck the fire into the cylinders. If the engine does not start and the fire continues to burn, discontinue starting and the fireguard should extinguish the fire using a Carbon Dioxide fire extinguisher
|
|
|
|
What is the purpose of pulling propeller through by hand for two of three revolutions prior to starting a radial or inverted engine?
|
to detect hydraulic lock. Ant liquid present in the cylinders will be indicated by an abnormal effort required to rotate the propeller, or by the propeller stopping abruptly during rotation.
|
|
|
|
What damage is most likely to occur if exsessive force is exerted on the crankshaft when there is liquid lock?
|
The force can bend or break a connecting rod or permanently damage the cylinder
|
|
|
|
What information must be located on or near fuel filler openings and oil filler openings?
|
For fuel filler openings, the word "fuel" and the minimum fuel grade or designation for the engine. Oil filler openings require the word "oil" to be marked at or near the filler cap.
|
|
|
|
Describe the system used to designate performance rating of aviation gasoline.
|
For fuels below grade 100, ocrane numbers are used. (Such as 91/96. The fuel is compared with mixtures of iso-octane and normal heptane. Thus, grade 91 fuel has the sname knock characteristics as a blend of 91 percent octane and 9 percent heptane. When two numbers are used, the first is the lean mixture performance rating. The second number is the rich mixture performance ratings.)
For fuels above grade 100, the numbers represents the performance rating of the fuel compared to 100 percent iso-octane. (That is, its knock-free power available as compared with that available with pure iso-octane. The first number is the lean mixture performance rating. The second number is the rich mixture performane mixture.) |
|
|
|
What would be the result of operatingan aircraft reciprocating engine using a lower grade of avgas (aviation gasoline) than that specified for the engine?
|
There would be a loss of engine power, efficiency, and possible detonation.
|
|
|
|
Why should an aviation mechanic know the meaning of the standard light signals which are used by control tower operations?
|
If radio communications is not possible, the light signals may be used for taxi control when an aircraft must be taxied to another part of the airport.
|
|
|
|
Which publication list the standard FAA hand signals a taxi signalman should use?
|
The FAA Airman's Information Manual (AIM).
|
|
|
|
What is the result of mixing aviation gasoline with jet fuel in a turbine engine?
|
When aviation gasoline is missed with jet fuel, the tetraethyl lead is the gasoline will form deposits on the turbine blades and vanes. Continued use of mixed fuel may cause a loss in engine effciency. However, there will be no detrimental effect on the engine if such usage is on a limited basis.
|
|
|
|
What may result if aviation gasoline that is contaminated with jet fuel is used in a reciprocating engine?
|
Gasoline which is contaminated with jet fuel is unsafe for use in a reciprocating engine and will result in complete engine failure.
|
|
|
|
When towing a large aircraft with a tow tractor, what brakes should be used to stop the aircraft?
|
The tow tractor brakes and the aircraft brakes should both be used. Use of the brakes should be coordinated by the person in the cockpit.
|
|
|
|
What are the five common forms of corrosion?
|
Surface corrosion, dissimilar metal corrosion, intergranular corrosion, stress corrosion, and fretting corrosion.
|
|
|
|
What is the cause of fretting corrosion?
|
It occurs when two mating surfaces, which are normally at rest with respect to each other, are subject to slight relative motion. It is characterized by pitting of the surfaces and the generation of large quantities of fine debris between the surfaces, identified as smoking rivets.
|
|
|
|
What are the factors which affect the type (form) of corrosion?
|
The form of corrosion varies with atmospheric conditions, size and shape of the metal, the type of metal, and the corrosion-producing agents present.
|
|
|
|
What methods are used for removing rust from aircraft materials?
|
Except on highly stressed steel surfaces (like oleo struts), the use of abrasive papers and compounds, small power buffers and buffing compounds, hand wire brushing and steel wool are all acceptable methods or removing rust.
|
|
|
|
What specific operations are part of corrosion-preventative maintenance?
|
Adequate cleaning, periodic lubrication, detailed inspection, prompt corrosion treatment, touch up of damaged paint, sealing, use of protective covers, and daily wipe-down of exposed critical areas
|
|
|
|
Name the steps for corrosion removal.
|
Clean and strip the corroded areas, remove as much corrosion as possible, neutralize any residual material remaining in pits and cervices, restore protective surface films and paint
|
|
|
|
What tools are approved for cleaning corroded anodized surface?
|
Fiber bristle brushes, aluminum wool, and aluminum wire brushes.
|
|
|
|
What products should be used to clean an aircraft engine?
|
A fine spray of kerosene or solvent
|
|
|
|
What is the preferred cleaning agent for plastic and rubber surfaces?
|
Soap and water
|
|
|
|
Name 5 ares of an aircraft that are more prone to corrosion?
|
Battery compartments, bilge areas, wheel wells and landing gear, flap recesses, lavatory, galley, and other areas where water might be entrapped.
|
|
|
|
What is the differnece between "wet wash" and "dry wash" aircraft cleaning?
|
Wet wash (water and an agent) cleaning is used to remove oil, grease, carbon deposits, and soils with the exception of corrosion and oxide films. Dry wash (compressed air or cloth) cleaning is used to remove film, dust, and small accumulations of dirt.
|
|
|
|
What are types of light duty and heavy duty aircraft cleaning agents?
|
Light duty cleaning agents are soap and synthetic detergent. Heavy duty cleaning agents are solvents and emulsion type cleaners.
|
|
|
|
What would you do before cleaning a wind screen?
|
Wet the surface before cleaning to prevent scratching
|
|
|
|
What does filform corrosion look like and where can it be found?
|
filform corrosion appears to look like thread of worm like puffiness of the painted surface. It occurs between the metal's surface and the protective coating.
|
|
|
|
What is the formula for the area of a rectangle?
|
Area = Length x Width
|
|
|
|
What is PI?
|
PI is a constant (3.1416) and is the ratio of the circumference to the diameter of any circle
|
|
|
|
What is the formula for the circumference to the diameter of any circle?
|
C=(PI)D
|
|
|
|
What is the formula for the area of a circle?
|
A=(PI)R^2
|
|
|
|
What is the root of a number?
|
The root of a given number is the base number that when multiplied by itself one or more times will produce the given number.
(E.g. the root of 4 is 2; 2x2=4) |
|
|
|
Give examples of perfect square numbers.
|
4, 9, 16, 64, 100, 144, etc.
|
|
|
|
How do you express a decimal as a percent?
|
Move the decimal two places to the right and ass the percent sign. For example, .75 is 75%, or .375 is 37.5%
|
|
|
|
Using the powers of ten, how may 1,000,000 be expressed?
|
Ten to the sixth power
|
|
|
|
What is the sum of a large negative number and a small positive number?
|
Subtract the smaller number from the larger number and use the sign of the larger number in the answer
|
|
|
|
How is a ratio expressed?
|
A ratio may be expressed as a fraction or it may be written using a colon (:) as a symbol for expressing a ration. Thus, the ratio 5 to 7 may be written as 5/7 of 5:7
|
|
|
|
How do you divide one fraction by another?
|
Multiply the first fractions numeration and denominator by the denominator and numerator or the second fration. (a/b divided by c/d = a/b multiplied by d/c)
(flip the second and multiply) |
|
|
|
What is the definition of "time in serivce" with respect to maintenance time records?
|
"Time in service" means the time from the moment an aircraft leaves the surface of the earth until it touches down at the next point of landing. (Weight off wheels)
|
|
|
|
What are the record requirments after compliance with a 100 Hour Inspection?
|
There must be an entry made in the maintenance records indicating the type and date of the inspection, aircraft time in service, a statement to the effect that the aircraft has been inspected in accordance with 100 Hour Inspection requirments and was determined to be in airworthy condition, and the signature and certificate number of the person approving the aircraft for return to service. (FAR 43.11 A 1-4)
|
|
|
|
What are the record requirments after compliance with an Airworthiness Directive (AD)?
|
The record entries must show the specific number assigned to the AD, the date of compliance, the method of compliance, aircraft time in service, as well as the signature and cetificate number of the person who complied with the AD. In addition, the records must show the current status of all applicable Airworthiness Directives, and must include the method of compliance.
|
|
|
|
Where should the description of a major repair or major alteration be recorded?
|
In the correct logbook and on the FAA Form 337, which then becomes part of the permanent maintenance record
|
|
|
|
What is the disposition of the two FAA Form 337s after they are completed?
|
You must give one copy to the aircraft owner and one copy is sent to the FAA Flight Standards District Office in Oklahoma City, Oklahoma.
|
|
|
|
Who is required to make the entry in the aircraft records after a 100 Hour Inspection has been performed?
|
The appropriately rated and certified mechanic that performed the work.
|
|
|
|
How long must the record of a 100 Hour Inspection be retained by the owner or operator?
|
Until the work is repeated or superseded by other work, or for one year after the 100 Hour Inspection was performed
|
|
|
|
Where can a mechanic find an example of a 100 Hour Inspection maintenance record entry?
|
FAR 43.11
|
|
|
|
When an aircraft is sold, what is done with the aircraft records containing the current status of Airworthiness Directives?
|
FARs require the records to be transfered to the purchaser at the time of the sale
|
|
|
|
What type of maintenance record entry is required when an inspection under FAR 91.417 is made to a large airplane or a turbine engine-powered multiengine airplane and defects are found?
|
The entry must name the kind of inspection (continuous airworthiness inspection program, approved inspection program, etc.) And a signed and dated list of defects found must be given to the owner. (FAR 43.11 A-5)
|
|
|
|
What are the required entries in a new maintenance record for an engine that has been rebuilt and granted zero time by the manufacturer or by an agency approved by the manufacturer?
|
The manufacturer or agency that grants zero time to a rebuilt engine must enter into the records a signed statement of the date the engine was rebuilt, each change made as a required by Airworthiness Directives, and each change made in compliance with the manufacturer's service bullentins if any entry requested in a bulletin.
|
|
|
|
What is an AD summary?
|
A list of all Airworthiness Directives (airframe, engine,propeller, and equipment) that pertain to a particular aircraft.
|
|
|
|
What are AD frequencies?
|
An update is issued bi-weekly.
|
|
|
|
What is matter?
|
Anything that occupies space and has weight
|
|
|
|
What are three different states of matter?
|
Solids, liquid and gasses
|
|
|
|
What is the standard atmospheric pressure at sea level?
|
It is considered to be 14.7 psi or 29.92 inches of Hg (mercury)
|
|
|
|
What is the name of the atmospheric phenomenon where cool air is trapped near the earth by warm air?
|
A temperature inversion
|
|
|
|
What is the speed of sound through the air under standard sea level conditions?
|
It is 662 knots, or 761 mph
|
|
|
|
What determines the density of air?
(In other words density altitude.) |
The temperature and pressure acting on it.
|
|
|
|
What are the three basic parts of a lever?
|
The fulcrum, force of effort, and resistance
|
|
|
|
What is a first class lever, and give an example?
|
A first class lever is when the fulcrum is located between the effort and the resistance. An example of a first class level is a seesaw.
|
|
|
|
In what direction is force transmittied to a confined liquid?
|
Force is transmittied equally in all directions because it cannot be compressed
|
|
|
|
What is the formula for computing force, pressure, and area?
|
Force equals pressure times area or F=PxA
|
|
|
|
What is kinetic energy?
|
Energy in an object created from its movement.
|
|
|
|
What is absolute zero?
|
It is the temperature at which all motion of the atoms will cease entirely in a given sample of gas. It is considered to be -273 degrees Celsius
|
|
|
|
What are the two factors involved in work?
|
Force and movement through a measureable distance
|
|
|
|
How is pressure expressed in hydraulics and pneumatics?
|
It is expressed in pounds per square inch (psi)
|
|
|
|
What are the three methods of heat transfer?
|
Coduction, convection, and radiation
|
|
|
|
What are the three types of friction?
|
Rolling, Sliding, and Static
|
|
|
|
What is the purpose of Airworthiness Directives?
|
They are used to notify owners and mechanics of conditions that prevent an aircraft, engine, propeller, or appliance from being in airworthy condition
|
|
|
|
What FAA publication is used to notify aircraft owners of unsafe conditions
|
Airworthiness Conditions
|
|
|
|
When must an Airworthiness Directive be complied with?
|
The AD will include the time period necessary for corrective action to be completed
|
|
|
|
Where can you find a list of approved engines for use in a specific model aircraft?
|
In the Aircraft Specification or Type Certificate Date Sheet for that aircraft
|
|
|
|
Where can you find Airworthiness Standards for normal, utility, and acrobatic category airplane
|
FAR Part 23
|
|
|
|
Where can you find Airworthiness Standards for transport category airplanes?
|
FAR Part 25
|
|
|
|
What federal regulation defines the requirements for the issue of Type Certicates?
|
FAR Part 21
|
|
|
|
Where would you look to find out if a specific airplane can be certified in more than one category?
|
On the Aircraft Specifications of Type Certificate Data Sheet
|
|
|
|
What publication is issued by airframe, engine, and component manufactures to notify aircraft owners of design defects?
|
Service Bulletins
|
|
|
|
What publication contains complete instructions for maintenance of all systems and components installed in an aircraft?
|
The manufacturer's Aircraft Maintenance Manual
|
|
|
|
What are FAA Advisory Circulars?
|
They are publications containing non-regulatory material of interest to the aviation public. ACs presribe methods of performing certain maintenance and inspection procedures but are only considered acceptable data.
|
|
|
|
When are Service Bullentins considered mandatory?
|
When they are referenced within the Airworthiness Directive (AD).
|
|
|
|
When would you complete the FAA Form 337 in triplicate? (When should you have to complete three 337s?)
|
When installing extended range fuel tanks in the baggage or passenger compartment. One is given to the owner, one is sent to the FAA within 48 hours after the aircraft is approved for return to service, and one is placed on board the aircraft.
|
|
|
|
Which Federal Regulation presribes the certificate requirements for a mechanic?
|
FAR Part 65
|
|
|
|
What are the limitations of a certified mechanic in regards to aircraft instruments?
|
A mechanic may not calibrate or make any repairs or alterations to aircraft instruments
|
|
|
|
What are the privileges and limitations of a certified mechanic in regards to propellers?
|
A powerplant mechanic may make minor repairs and alterations, but may not make major repairs or major alerations to propellers
|
|
|
|
When a mechanic has a permanent change of address, what must be done within 30 days after the change?
|
He/She must notify the Administrator of the FAA in writing or online at www.faa.gov
|
|
|
|
What is the duration of a certified mechanic
|
It is effective for until surrendered, suspended, or revoked
|
|
|
|
How long is a temporary mechanic certificate in effect?
|
120 days
|
|
|
|
What is used as a guide to determine if a repair is a major or minor repair?
|
FAR Part 43, Appendix A
|
|
|
|
What are the requirements of recent experience for a mechanic?
|
A certified mechanic may not exercise the privileges of his certificate and rating unless within the preceding 24 months he has, (for at least 6 months of the twenty four,) served as a mechanic under his certificate and rating, or supervised other mechanics, or supervised in a technical capacity, the maintenance or alteration of aircraft, or the administrator (FAA) had found that he is able to do so.
|
|
|
|
What may be used as a guide for 100 hour inspections?
|
FAR Part 43, Appendix D
|
|
|
|
What are the privileges of a certified mechanic in regard to performing a 100 inspection and returning an aircraft to service? An annual inspection?
|
A certified A&P mechanic may perform a 100 hour inspection and return an aircraft to service by making the proper entries in the maintenance records. An A&P mechanic with an Inspection Authorization may perform an annual inspection and return an aircraft to service.
|
|
|
|
Who has final responsibility for maintaining aircraft maintenance records?
|
The owner or operator of the aircraft
|
|
|
|
May an airframe mechanic perform maintenance on engines?
|
Yes, under the supervision of a powerplant mechanic.
|
|
