Module 6/1

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問題一覧

Chemical oxidation is the

direct combination of a metal with the oxygen in the atmosphere

Oxidation rate of a metal usually

increase with an increase in temperature

In the galvanic action process

the anode always corrodes

In the process of crevice corrosion, the anodic are is at the

the bottom of the crevice

When a metal is in contact with a fluid which promotes the growth of

microbiological

contaminants , such as in kerosene fuel and toilet waste fluids

microbiological corrosion is a present danger

Intergranular corrosion is caused by

incorrect heat treatment

Magnesium alloys

are not susceptible to intergranular corrosion

is a microbial fungal growth in kerosene fuel

Hormocoins resinae

Intergranular corrosion

often cannot be detected and has no visual surface indication

can be recognized on aluminum alloys by the appearance of grayish powder fuzzy deposit or a whiskery growth.

Mercury contamination

The oxide film formed on the surface of aluminium is

non-porous

Corrosion will spread more rapidly when metals are exposed to

high temperatures

Corrosion at the grain boundaries is called

intergranular

attack along the grain boundaries, or immediately adjacent to grain boundaries

Intergranular corrosion

Intergranular corrosion can be confirmed by

X-ray inspection

Stress corrosion is

corrosion due to fretting

the tendency of metals to revert to the thermodynamically more stable, oxidized, state

Corrosion

is another name for electrolytic, electrochemical or dissimilar metal corrosion

Galvanic corrosion

• Pitting corrosionis a form of extremely localized corrosion that leads to the creation of small holes in the metal may be caused by

localized damage to protective coating

Corrosion caused by galvanic action is the result of

contact between two dissimilar metals

Microbiological corrosion refers to corrosion and ensuing loss of metal caused by

biological organisms

Corrosion may be recognised by the appearance of ‛cocoa’ powder staining on steels is called

Fretting corrosion

NOT one of the conditions for corrosion to occur.

The presence of a cladding film is

The appearance of corrosion on Steel is normally

reddish brown (rust)

The appearance of corrosion on Aluminium alloy is normally as

whitish powder

is not one of the listed condition for corrosion to be occurred

torque load

A BA thread has a thread angle of

47 ½ degree

On a double -start thread the

lead is twice the pitch

Aircraft bolts are usually

class 3 fit

To measure an external thread , normally

a plain ring or caliper gauge is used

The female threads are subjected mainly to

compression force

A double start thread will travel axially

twice as far in one complete turn as one engaged with a single thread of similar pitch

Go and NOT GO screw gauges are used to check that an

internal thread is correct

Studs which have a size larger thread at one end are called

stepped studs

All threaded fasteners consist of

the male thread and female thread

The male threads are subjected mainly to

tension force

The difference between fine threads and

coarse threads that coarse threads are easier to assemble and misalignment is rare

allows you to turn the nut all the way down using only your fingers

A class 1 fit

may be considered as an inclined plane or wedge wrapped around a cylinder or shaft to form a helix

A screw

Crinkle washers are often used in lightly loaded applications in instrument and

electrical installations

Washers have one or more tabs projecting from the external diameter; they may also be ganged for locking two or more nuts ,known as

Tab washers

Locking wire is used only

once

Spring washers are available in two forms as

a single coil or as a double coil

Any locking wire damaged during installation will be weakened and must be

replaced

Wire sealing must be accomplished with the locking wire specified in the

aircraft maintenance manual

Rollpins must be used only

one time

There are basically two types of thread inserts available. One is known as

thin wall insert

The reason why the two-nut system is effective because it is

resisting self-loosening due to the way the threads are jammed together

A ‘Kayloc’ nut is a type of

stiffnut

A type B self tapping screws i

blunt point

Aluminum alloy bolts usually

anodized

When more than one anchor nut is attached to a plate , they are referred to as

strip nuts

Studs are used

where it is not possible to drill through both components for the fitting of blots

clevis bolt in a control cable fork end would be loaded in

shear

A British close tolerance bolt is identified by

hexagon headed or have 100˚counter sunk head

Aircraft bolts are always manufactured in

class 3, medium fit

conical shake proof washers are used for locking

countersunk screws

In many high load joints, where higher load distribution is required,

barrel nuts(or floating nuts). are often used

Tri-wing screws are easy to identify as they are the

three-point slots

A letter for British standard blot indicates

the shank diameter

A bolt with a single raised dash on the head is classified as an

AN corrosion-resistant steel bolt

A bolt with a two raised dash on the head is classified as an

Aluminium alloy bolt

A bolt with an X inside a triangle on the head is classified as

Steel close tolerance bolt

The screws differ from bolts in that they are generally

made from lower-strength materials

Wire locking also known as

safety wiring

Many fasteners have holes drilled in the heads to

allow fasteners to be locked by safety wire

describes all the various types of fastening device employed in the construction of an aeroplane

Fastener

The three principal parts of a bolt are

the head, thread, and grip

are used in structure that is required to be fluid tight

Double angle countersunk rivets

A rivet made from

5056 aluminum alloy is identified with a cross on the head

Flush head or countersunk rivets have an angle of

78-120 degrees countersink

2017 & 2024 rivets must be

used immediately or refrigerated after heat treatment

A rivet with a plain head is classified as

1100 (A)

Hoses for highly pressure applications are made from

synthetic rubber liner

Rigid pipe flaring has the purpose of

preventing the end of the pipe from slipping and providing fluid tight seal

The rigid pipes on gas turbine engines are made from

stainless steel

Flexible lines must be fitted with a slack of

5-8% of the length

Flexible sealing element subject to motion is a

packing

All aircraft high-pressure hoses have a maximum working pressure of at least

3000 1500

is a legible marking parallel to the longitudinal axis of a hose and is used to determine the straightness of the hose.

The lay line

Replacement tubing should be of the same size and material as

the original line

Pipe manufacture to American AN specifications have an induced flare angle of

74°

is used extensively on gas turbine engine fuel systems and high pressure hydraulic systems

Stainless steel tubing

The tubing used is generally of the seamless type and is specified by

material, outside diameter and wall thickness

The 1100 or 3003 aluminum alloy lines are used fo

fuel lines

Module5

Module5

Module 5 1

Module 5 1

Module 2

Module 2

Module2 /1

Module2 /1

Module9

Module9

Module 10

Module 10

Module 10/1

Module 10/1

Module 6

Module 6

Module 6/2

Module 6/2

問題一覧

Chemical oxidation is the

direct combination of a metal with the oxygen in the atmosphere

Oxidation rate of a metal usually

increase with an increase in temperature

In the galvanic action process

the anode always corrodes

In the process of crevice corrosion, the anodic are is at the

the bottom of the crevice

When a metal is in contact with a fluid which promotes the growth of

microbiological

contaminants , such as in kerosene fuel and toilet waste fluids

microbiological corrosion is a present danger

Intergranular corrosion is caused by

incorrect heat treatment

Magnesium alloys

are not susceptible to intergranular corrosion

is a microbial fungal growth in kerosene fuel

Hormocoins resinae

Intergranular corrosion

often cannot be detected and has no visual surface indication

can be recognized on aluminum alloys by the appearance of grayish powder fuzzy deposit or a whiskery growth.

Mercury contamination

The oxide film formed on the surface of aluminium is

non-porous

Corrosion will spread more rapidly when metals are exposed to

high temperatures

Corrosion at the grain boundaries is called

intergranular

attack along the grain boundaries, or immediately adjacent to grain boundaries

Intergranular corrosion

Intergranular corrosion can be confirmed by

X-ray inspection

Stress corrosion is

corrosion due to fretting

the tendency of metals to revert to the thermodynamically more stable, oxidized, state

Corrosion

is another name for electrolytic, electrochemical or dissimilar metal corrosion

Galvanic corrosion

• Pitting corrosionis a form of extremely localized corrosion that leads to the creation of small holes in the metal may be caused by

localized damage to protective coating

Corrosion caused by galvanic action is the result of

contact between two dissimilar metals

Microbiological corrosion refers to corrosion and ensuing loss of metal caused by

biological organisms

Corrosion may be recognised by the appearance of ‛cocoa’ powder staining on steels is called

Fretting corrosion

NOT one of the conditions for corrosion to occur.

The presence of a cladding film is

The appearance of corrosion on Steel is normally

reddish brown (rust)

The appearance of corrosion on Aluminium alloy is normally as

whitish powder

is not one of the listed condition for corrosion to be occurred

torque load

A BA thread has a thread angle of

47 ½ degree

On a double -start thread the

lead is twice the pitch

Aircraft bolts are usually

class 3 fit

To measure an external thread , normally

a plain ring or caliper gauge is used

The female threads are subjected mainly to

compression force

A double start thread will travel axially

twice as far in one complete turn as one engaged with a single thread of similar pitch

Go and NOT GO screw gauges are used to check that an

internal thread is correct

Studs which have a size larger thread at one end are called

stepped studs

All threaded fasteners consist of

the male thread and female thread

The male threads are subjected mainly to

tension force

The difference between fine threads and

coarse threads that coarse threads are easier to assemble and misalignment is rare

allows you to turn the nut all the way down using only your fingers

A class 1 fit

may be considered as an inclined plane or wedge wrapped around a cylinder or shaft to form a helix

A screw

Crinkle washers are often used in lightly loaded applications in instrument and

electrical installations

Washers have one or more tabs projecting from the external diameter; they may also be ganged for locking two or more nuts ,known as

Tab washers

Locking wire is used only

once

Spring washers are available in two forms as

a single coil or as a double coil

Any locking wire damaged during installation will be weakened and must be

replaced

Wire sealing must be accomplished with the locking wire specified in the

aircraft maintenance manual

Rollpins must be used only

one time

There are basically two types of thread inserts available. One is known as

thin wall insert

The reason why the two-nut system is effective because it is

resisting self-loosening due to the way the threads are jammed together

A ‘Kayloc’ nut is a type of

stiffnut

A type B self tapping screws i

blunt point

Aluminum alloy bolts usually

anodized

When more than one anchor nut is attached to a plate , they are referred to as

strip nuts

Studs are used

where it is not possible to drill through both components for the fitting of blots

clevis bolt in a control cable fork end would be loaded in

shear

A British close tolerance bolt is identified by

hexagon headed or have 100˚counter sunk head

Aircraft bolts are always manufactured in

class 3, medium fit

conical shake proof washers are used for locking

countersunk screws

In many high load joints, where higher load distribution is required,

barrel nuts(or floating nuts). are often used

Tri-wing screws are easy to identify as they are the

three-point slots

A letter for British standard blot indicates

the shank diameter

A bolt with a single raised dash on the head is classified as an

AN corrosion-resistant steel bolt

A bolt with a two raised dash on the head is classified as an

Aluminium alloy bolt

A bolt with an X inside a triangle on the head is classified as

Steel close tolerance bolt

The screws differ from bolts in that they are generally

made from lower-strength materials

Wire locking also known as

safety wiring

Many fasteners have holes drilled in the heads to

allow fasteners to be locked by safety wire

describes all the various types of fastening device employed in the construction of an aeroplane

Fastener

The three principal parts of a bolt are

the head, thread, and grip

are used in structure that is required to be fluid tight

Double angle countersunk rivets

A rivet made from

5056 aluminum alloy is identified with a cross on the head

Flush head or countersunk rivets have an angle of

78-120 degrees countersink

2017 & 2024 rivets must be

used immediately or refrigerated after heat treatment

A rivet with a plain head is classified as

1100 (A)

Hoses for highly pressure applications are made from

synthetic rubber liner

Rigid pipe flaring has the purpose of

preventing the end of the pipe from slipping and providing fluid tight seal

The rigid pipes on gas turbine engines are made from

stainless steel

Flexible lines must be fitted with a slack of

5-8% of the length

Flexible sealing element subject to motion is a

packing

All aircraft high-pressure hoses have a maximum working pressure of at least

3000 1500

is a legible marking parallel to the longitudinal axis of a hose and is used to determine the straightness of the hose.

The lay line

Replacement tubing should be of the same size and material as

the original line

Pipe manufacture to American AN specifications have an induced flare angle of

74°

is used extensively on gas turbine engine fuel systems and high pressure hydraulic systems

Stainless steel tubing

The tubing used is generally of the seamless type and is specified by

material, outside diameter and wall thickness

The 1100 or 3003 aluminum alloy lines are used fo

fuel lines