Aircraft general knowledge

Stability about the axis which runs parallel to the line of flight is referred to as

What type loads cause the most rivet failures?

With which system is differential control associated?

Clad aluminum alloys are used in aircraft because they

One method of inspecting a laminated fiberglass structure that has been subjected to damage is to

The angle of incidence of an airplane at rest

The primary alloying agent of 2024-T36 is indicated by the number

An aircraft that is required by Section 91.409, to have a 100-hour inspection may be flown beyond the inspection requirement

What is generally the best procedure to use when removing a solid shank rivet?

If a single-rotor helicopter is in forward horizontal flight, the angle of attack of the advancing blade is

What is the purpose of stringers?

The airframe structure must remain substantially intact after experiencing

The skin of a modern pressurized aircraft

Station numbers (Stn) and water lines (WL) are:

Flight deck windows are constructed from

A cantilever wing:

A torsion box:

A lightening hole in a rib

Control surface flutter

A damage tolerant structure

It is the maximum stress expected in any structural member

It is the ability of metal to resist deformation

It represents the highest stress experienced within the material at its moment of rupture.

It is the maximum stress a material can sustain without rupture.

Capacity of a material to absorb energy in the elastic range

Ratio of maximum energy absorbed per unit volume

Energy absorption in the plastic range

Equal to the area under the entire stress-strain curve.

A material's ability to be bent, formed, or shaped without cracking or breaking

The ability of metal to be drawn into wire stock, extrusions, or rods

Toughness is a material's ability to resist tearing or breaking when it is bent or stretched.

The ability of metal to be joined by heating and melting is defined as fusibility.

Is a process wherein a piece of metal is worked at temperatures above its critical range.

Consists of forming hot metal ingots with rollers to form sheets, bars, and beams.

Is used to form large and heavy parts

Is the process of forcing metal through a die which imparts a required cross-section to the metal.

Wrought alloy designation

Cast alloy designation

Annealed, soft state

Intermediate heat treatment

Combination of iron and carbon

Steel heated above the critical range (solid solution of cementite in gamma iron)

Is the hardest structure obtained in steel.

Steels containing 0.85 % carbon. Greatest hardness from heat treatment is obtained in this composition.

Which rivets should be selected to join two sheets of .032-inch aluminum?

How many MS20470 AD-4-6 rivets will be required to attach a 10 x 5 inch plate, using a single row of rivets, minimum edge distance, and 4D spacing?

Anything that needs periodic replacement

Any part that is usually repaired and then returned to service as repaired/overhauled or even "as new" condition.

Any component that is usually just thrown away at the end of its useable life, this is usually because it is not worth repairing or cannot be repaired or overhauled due to its construction and intended use.

Any component that is rendered unsuitable for reuse when it's installed and used.

With a hyd lock there is:

The primary purpose of a hydraulic reservoir is:

A relief valve

Pascal's law states that

The purpose of an accumulator is to

Oil is used in an oleo strut to:

Inadvertent retraction of the landing gear on the ground:

The best extinguishant to use on a wheel or brake fire is:

Landing gear ground lock pins are:

A likely cause of wheel shimmy is:

Which of the following may a certificated airframe and powerplant mechanic perform on aircraft and approve for return to service?

1. a 100-hour inspection.
2. an annual inspection, under specified circumstances.
3. a progressive inspection, under specified circumstances.

Which of the following describe the effects of annealing steel and aluminum alloys?

1. decrease in internal stress.
2. softening of the metal.
3. improved corrosion resistance.

Which of the listed conditions is NOT one of the requirements for corrosion to occur?

A primary cause of intergranular corrosion is

Which of these materials is the most cathodic?

Which will weigh the least?

Which type crack can be detected by magnetic particle inspection using either circular or longitudinal magnetization?

The pattern for an inclusion is a magnetic particle buildup forming

Which material cannot be heat treated repeatedly without harmful effects?

Unless otherwise specified or required, aircraft bolts should be installed so that the bolthead is

Which heat-treating process of metal produces a hard, wear-resistant surface over a strong, tough core?

Who is responsible for upkeep of the required maintenance records for an aircraft?

The clearance between the piston rings and the ring lands is measured with a

Which tool can be used to measure the alignment of a rotor shaft or the plane of rotation of a disk?

Which is the ratio of the water vapor actually present in the atmosphere to the amount that would be present if the air were saturated at the prevailing temperature and pressure?

Which condition indicates a part has cooled too quickly after being welded?

The boiling point of a given liquid varies

The aluminum code number 1100 identifies what type of aluminum?

The lifting or flaking of the metal at the surface due to delamination of grain boundaries caused by the pressure of corrosion residual product buildup is called

A nonelectrolytic chemical treatment for aluminum alloys to increase corrosion resistance and paint-bonding qualities is called

Which part(s) of a semi-monocoque fuselage prevent(s) tension and compression from bending the fuselage?

Which fiber to resin (percent) ratio for advanced composite wet lay-ups is generally considered the best for strength?

When fabricating parts from Alclad 2024-T3 aluminum sheet stock,

The general rule for finding the proper rivet diameter is

Which statement is true regarding the inspection of a stressed skin metal wing assembly known to have been critically loaded?

Rivet pitch is the distance between the

Which rivet is used for riveting magnesium alloy structures?

Aircraft structural units, such as spars, engine supports, etc., which have been built up from sheet metal, are normally

Sandwich panels made of metal honeycomb construction are used on modern aircraft because this type of construction

The purpose of spring tabs or servo tabs is to

What is the purpose of refrigerating 2017 and 2024 aluminum alloy rivets after heat treatment?

Which procedure is correct when using a reamer to finish a drilled hole to the correct size?

An airplane that has a tendency to gradually increase a pitching moment that has been set into motion has

The dimensions of an MS20430AD-4-8 rivet are

If an aircraft's transparent plastic enclosures exhibit fine cracks which may extend in a network over or under the surface or through the plastic, the plastic is said to be

An airplane which has good longitudinal stability should have a minimum tendency to

If control cables are adjusted properly and the control surfaces tend to vibrate, the probable cause is

The purpose of the vertical fin is to provide

Cherrymax and Olympic-Lok rivets

A DD rivet is heat treated before use to

The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud diameter is measured in

Which part(s) of a semi monocoque fuselage prevent(s) tension and compression from bending the fuselage?

How many MS20470 AD-4-6 rivets will be required to attach a 10" x 5" plate, using a single row of rivets, minimum edge distance, and four times rivet diameter pitch?

What should be the included angle of a twist drill for soft metals?

Which of the following need not be considered when determining minimum rivet spacing?

A sheet metal repair is to be made using two pieces of 0.0625-inch aluminum riveted together. All rivet holes are drilled for ⁵⁄₃₂-inch rivets. The length of the rivets to be used will be.

Proper pre-preg composite lay-up curing generally accomplished by

1. applying external heat.
2. room temperature exposure.
3. adding a catalyst or curing agent to the resin.
4. applying pressure.

Turbine engine air used for air conditioning and pressurization is generally called

Which of the following may be used for the repair of fuel leaks on most integral fuel tanks?

The size drill used to open holes for a 5/32 inch diameter rivet is

Adhesives that contain resins dissolve in water solution, such as wood glue or wood paste is

The strength classification of fabric in aircraft covering is based on

These nuts are designed to fit on standard airframe bolts and may be used when the bolt is subjected to either shear or tensile loads

The maximum stress that can be applied to a material without permanent deformation of the material.

Which rivet is made of heat-treated aluminum alloy and it is so called icebox rivet?

Which of the following methods may be suitable to use to detect cracks open to the surface in aluminum forgings and castings?

1. Eddy current inspection.
2. Dye penetrant inspection.
3. Magnetic particle inspection.
4. Metallic ring inspection.
5. Ultrasonic inspection.
6. Visual inspection.

The symbol for propeller efficiency is the Greek letter η (eta). It is an expression of the ratio between

(1) According to 14 CFR, Part 91, repairs to an aircraft skin should have dimensional sketch included in the permanent records. (2) On occasion, a mechanic may need to make a simple sketch of a proposed repair to an aircraft, a new design, or a modification. Regarding the above statements,

The working theory behind the design of an efficient propeller.

Which statement is correct regarding an aircraft that is found to be unairworthy after an annual inspection, due to an item requiring a major repair (assuming approved data is used to accomplish the repair)?

An aircraft that is due an annual inspection may be flown

Why is it extremely important that no more than about ten seconds elapse between removal of an alloy from the furnace and the quench?

2024T4 - what does T4 mean?

Which alloys contain approximately 80 percent nickel & 14 percent chromium?

SAE 3020, what is the degree of carbon content?

A process that is used to relieved stresses on ferrous metals.

What is the maximum grain deviation for the wood to used it on aircraft structures?

This refer to the type of reinforcing fiber that has a disadvantage of reacting with aluminum alloys, that may cause galvanic corrosion.

A fiber orientation that runs parallel to the 0° direction.

A type of composites that consist of two or more layers of different reinforcing material laminated together.

What is the minimum edge distance for aircraft rivets?

A type of rivets that were developed for used on streamline airfoils and permit a smooth flow over an aircraft's wings or control surfaces.

A type of rivet that are being characterized by a raised dot.

A bolt with the code AN5-22 is typically how long?

What is the type of bolt being identified by a triangle on its head?

If a nut is being classify as a class 3 fit, what does it mean?

Which publication manual indicates the maximum torque recommendations for bolts and nuts?

If an aircraft is due for a 100-hour inspection but it is in a place where there are no facility for them, how much time that the said aircraft is allowed to fly in order to ferry it to their respective facility?

These are published to notify aircraft owners and other interested persons of unsafe conditions and to prescribe the conditions under which the product may continue to be operated.

An NDT inspection that utilizes the use of fluorescent particle solution and inspect it under black light.

This inspection is required when an aircraft is operated under 14 CFR part 91 and used for hire, such as flight training.

In an AN426 DD 4-6 designation, what is the length of the rivet?

Which rivet type is also known as field rivets?

The diameter of a clevis bolt is normally given in what increments?

It is one which, if improperly done, might appreciably affect the weight, balance, structural strength, performance, power plant operation, flight characteristics, or other qualities affecting airworthiness; or one which is not done according to accepted practices or cannot be done by elementary operations.

An aircraft was not approved for return to service after an annual inspection and the owner wanted to fly the aircraft to another maintenance base. Which statement is correct?

Which maintenance action is an airframe major repair?

What is the means by which the FAA notifies aircraft owners and other interested persons of unsafe conditions and prescribes the condition under which the product may continue to be operated?

If work performed on an aircraft has been done satisfactorily, the signature of an authorized person on the maintenance records for maintenance or alterations performed constitutes

Where is the record of compliance with Airworthiness Directives or manufacturers' service bulletins normally indicated?

Galvanic corrosion is likely to be most rapid and severe when

When the specific torque value for nuts is not given, where can the recommended torque value be found?

Alclad is a metal consisting of

In rotorcraft external-loading, the ideal location of the cargo release is where the line of action passes

Which rivet may be used as received without further treatment?

What action is required when a minor repair is performed on a certified aircraft?

Where is the record of compliance with Airworthiness Directives or manufacturers' service bulletins normally indicated?

The elevators of a conventional airplane are used to provide rotation about the...

A piece of sheet metal is bent to a certain radius. The curvature of the bend is referred to as the...

What is the purpose of the wing main spar?

The classification of high tensile strength fibreglass used in aircraft structures is...

A torsion box...

What should be done to prevent rapid deterioration when oil or grease come in contact with a tire?

The auxiliary (tail) rotor of a helicopter permits the pilot to compensate for and/or accomplish which of the following?

When inspecting a control cable turnbuckle for proper installation, determine that...

Which is an acceptable safety device for a castle nut when installed on secondary structures?

Which defect in aircraft finishes may be caused by adverse humidity, drafts, or sudden changes in temperature?

Which type of coating typically includes phosphoric acid as one of its components at the time of application?

When inspecting a butt welded joint by visual means,

Liquid penetrant inspection methods may be used on which of the following?

1. porous plastics.
2. ferrous metals.
3. nonferrous metals.
4. smooth unpainted wood.
5. nonporous plastics.

A mechanic has completed a bonded honeycomb repair using the potted compound repair technique. What nondestructive testing method is used to determine the soundness of the repair after the repair has cured?

The vertical flight of a helicopter is controlled by

Rivet pitch is the distance between the

Which of these materials is the most anodic?

A primary cause of intergranular corrosion is

If too much acetylene is used in the welding of stainless steel,

What type of inspection can determine delamination damage of a composite structure?

Nickel-cadmium battery cases and drain surfaces which have been affected by electrolyte should be neutralized with a solution of

Which of the following statements accurately describes the capabilities of liquid penetrant testing?

The limitation of a liquid penetrant test is:

Which of the following is not an advantage of magnetic particles testing?