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New General Oral > Oral New Update > Flashcards

Oral New Update Flashcards

1
Q

What is considered the basic building block of all matter?

A

The atom

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2
Q

What is one advantage of AC circuits over DC circuits in an aircraft?

A

1) AC can be transmitted over long distances more readily and more economically than DC.
2) Space and weight can be saved.
3) Circuit breakers will operate satisfactorily at altitude.
4) AC devices are smaller and simpler.
5) Most 24-volt aircraft systems have special equipment that requires a certain amount of 400 cycle AC current.

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3
Q

What is the definition of a short circuit?

A

• An unintentionally low resistance path between a component / conductor and ground.

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4
Q

What is magnetism?

A

• The property of an object to attract certain metallic substances.

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5
Q

What is the difference between permanent and temporary magnets?

A

• When an external magnetizing force is removed, permanent magnets retain their magnetism for an extended time. Temporary magnets quickly lose most of their magnetism.

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6
Q

What is the most frequent cause of damage to solid-state components and integrated circuits?

A

Electro-static discharge (ESD) from the human body due to careless handling

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7
Q

What are paralleling generators and how is the load distributed?

A

This is when two or more generators are operated at the same time to supply power for a load that must be shared equally.

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8
Q

What could cause a Nickel-Cadmium battery to fail to deliver its rated capacity?

A

Cell imbalance or faulty cells

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9
Q

What is the difference between an OR logic gate and an AND logic gate?

A

An OR logic gate needs one input OR the other input to have an output. The AND logic gate need one input AND the other input to have an output.

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10
Q

When is a full section view used on an aircraft drawing?

A

When interior construction or hidden features of an object cannot be shown clearly by exterior views.

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11
Q

Hidden view line/ center lines / alternate position

A

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 (see page 13)

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.

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12
Q

What are schematic diagrams generally used for?

A

They are mainly used for troubleshooting

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13
Q

The weight and balance system commonly employed among aircraft consists of three equally important elements. What are they?

A

Weighing of the aircraft, maintaining the weight and balance records, and the proper loading of the aircraft

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14
Q

What does the term Mean Aerodynamic Chord (MAC) refer to?

A

The MAC is the average chord or distance from the leading edge to the trailing edge of an airfoil.

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15
Q

Why are accurate up-to-date empty weight C.G. data so important?

A

All other weight and balance calculations are based on empty weight C.G.

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16
Q

Before a helicopter is weighed, it must be leveled in what directions?

A

Longitudinally and laterally

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17
Q

In the early days of aviation, what tubing material was used extensively in aviation fluid
applications?

A

Copper tubing

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18
Q

How can you tell that a flexible hose has been installed in a twisted position?

A

By the identification stripe running along the hose length

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19
Q

In addition to being securely clamped in place, how should metal, fuel, oil, and hydraulic lines be installed in an aircraft?

A

They should be electrically grounded to the aircraft structure.

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20
Q

Scratches and nicks may be repaired if they are less than what percent of the wall thickness?

A

10 percent

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21
Q

How is flared tubing affected by overtightening of the fittings?

A

The flare is likely to be damaged.

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22
Q

When inspecting fittings, how may a flareless fitting be distinguished from a flared tube type?

A

There is no flare cone and no space between the threads and the end of the fitting.

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23
Q

What is the purpose of a sleeve on a flared-tube connection?

A

The nut fits over the sleeve and when tightened, draws the sleeve and tubing flare tightly against the male fitting to form the seal

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24
Q

What property is essential for metals used in making wire and tubing?

A

Property of ductility

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25
Q

Why should a micrometer be periodically calibrated?

A

To help ensure micrometer accuracy.

26
Q

What occurs during the preparation stages when penetrant inspection liquid is applied to, and then removed from, a part that is cracked?

A

Penetrating liquid enters the crack and remains there to make the crack visible after developer is applied.

27
Q

What do the markings on the heads of solid shank rivets indicate?

A

The material they are made from and their strength.

28
Q

How can the torque for a bolt or nut be determined when the torque is not listed in maintenance procedures?

A

From the information found in the standard torque table.

29
Q

Which steel alloy is noted for its toughness and is most used for aircraft tubular structure, such as frame members, engine mounts, landing gear parts, and other structural parts?

A

Chrome-Molybdenum Steel

30
Q

How is work hardening obtained?

A

By cold working metal.

31
Q

What portable hardness tester is commonly used for testing aluminum alloys, copper, brass, or other relatively soft materials?

A

Barco Tester

32
Q

What is the main difference between thermoplastic and thermosetting resins?

A

Thermoplastic resins can be softened by heat and become hard again, thermosetting resins do not soften when heated and will char and burn rather than melt.

33
Q

What is the purpose for thermoplastic and thermosetting resins?

A

Thermoplastic acrylic (plexiglass) is used for windshields, thermosetting resins are commonly used as matrix material in composites.

34
Q

Name one material commonly used as the reinforcing component in structural composite laminates.

A

Kevlar, Fiberglass, or graphite

35
Q

Name the substances commonly used as the matrix material in structural composite laminates.

A

Polyester resin and epoxy resin.

36
Q

Name one advantage of using preimpregnated materials over non-preimpregnated materials in the construction or repair of composite components.

A
  1. Preimpregnated fabric contains the proper amount of matrix.
  2. The reinforcing fibers are completely and evenly permeated with matrix.
  3. The matrix has the correct proportions of resin and hardener.
37
Q

What class threads are used on aircraft?

A

Class 3 threads.

38
Q

What is another name for aramid material?

A

Kevlar

39
Q

What is a plug used to repair threads?

A

Helicoil

40
Q

Why should no one ever approach a single-rotor helicopter from the rear?

A

The tail rotor is invisible when operating.

41
Q

When refueling an aircraft, what precautions should be taken?

A

Use the correct fuel:
properly ground the aircraft and refueling unit:
protect aircraft surfaces from hose or nozzle damage.

42
Q

What is meant by the term HOT START when starting an aircraft turbine engine?

A

A hot start occurs when the engine operating temperature exceeds specified limits during start.

43
Q

What are some typical ground operation hazards?

A

Foreign objects, other aircraft, fire, noise levels, jet intake areas.

44
Q

Why are water type fire extinguishers not recommended for class C fires?

A

The possibility of electrocution.

45
Q

Why are fingers not curled over the prop when hand propping and engine?

A

Kickback from the engine may break them or draw your body into the blade path.

46
Q

If, due to the configuration of an aircraft, it is impossible for a person to mark an aircraft in accordance with 14 CFR Part 45.21 and 45.23 through 45.33, what must be done?

A

The owner/operator may apply to the FAA for different marking procedures.

47
Q

What is exfoliation corrosion?

A

An advanced form of intergranular corrosion

48
Q

Why should aluminum metal polish not be used on anodized aluminum surfaces?

A

It will remove the oxide coat.

49
Q

Why is the aircraft cleaned before inspection?

A

It enables the mechanic to conduct a more accurate inspection.

50
Q

Define the term “aspect ratio”

A

Aspect ratio is the ratio of the length (or span) of an airfoil to its width (or chord)

51
Q

What is a trapezoid?

A

A quadrilateral having one pair of parallel sides.

52
Q

What is FAA Form 8100-2?

A

It is a Standard Airworthiness Certificate

53
Q

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?

A

The entry must name the kind of inspection
(continuous airworthiness inspection program, approved aircraft inspection program, etc.)
And a signed and dated list of defects found must be given to the owner. (FAR 43.11 a-5)

54
Q

Two gears with teeth on their outer edges act like what class of lever?

A

first-class lever.

55
Q

What is magnetism?

A

Motion of an electric charge, resulting in attractive and repulsive forces between objects.

56
Q

What are the different ways to measure Temperature?

A

Fahrenheit, Celsius, Kelvin, Rankine

57
Q

What is the definition of friction?

A

Opposition to the relative movement between two objects.

58
Q

What is the term used to describe the ratio of the amount of water vapor actually present in the atmosphere as compared to when the air is saturated with water vapor?

A

Relative humidity.

59
Q

Irregular and haphazard inspections invariably result in what?

A

The result is a gradual and certain deterioration of an aircraft.

60
Q

A review of accident related data indicates that approximately 75-80 percent of all aviation accidents are the result of human error. Of those accidents, what percent are maintenance related?

A

About 12 percent

61
Q

What is exfoliation corrosion ?

A

An advanced form of intergranular corrosion

New General Oral (2 decks)

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