M6c5

48問 • 1年前

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問題一覧

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 is

blunt point.

Alaminum alloy bolts usually

anodized

Studs are used

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

A 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.

Cconical 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.

describe 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

Double angle countersunk rivets

are used in structure that are required to be fluid tight.

A rivet made from 5056 aluminum alloy is identified with

a cross on the head.

Flush head or countersunk rivets have an angle of …………….. countersink .

78-120 degrees

2017 & 2024 rivets must be

used immediately or refrigerated after heat treatment .

A rivet with a plain head is classified as

1100 (A)

It is tubular in shape and is slotted the full length of the tube.

It may be used with a drilled bolt and slotted or castellated nut or with a nut drilled for the purpose. roll pin

Roll pin is tubular in shape and is slotted the full length of the tube.

The pin is inserted with hand tools and is compressed as it is driven into place.

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問題一覧

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 is

blunt point.

Alaminum alloy bolts usually

anodized

Studs are used

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

A 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.

Cconical 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.

describe 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

Double angle countersunk rivets

are used in structure that are required to be fluid tight.

A rivet made from 5056 aluminum alloy is identified with

a cross on the head.

Flush head or countersunk rivets have an angle of …………….. countersink .

78-120 degrees

2017 & 2024 rivets must be

used immediately or refrigerated after heat treatment .

A rivet with a plain head is classified as

1100 (A)

It is tubular in shape and is slotted the full length of the tube.

It may be used with a drilled bolt and slotted or castellated nut or with a nut drilled for the purpose. roll pin

Roll pin is tubular in shape and is slotted the full length of the tube.

The pin is inserted with hand tools and is compressed as it is driven into place.