Parts & Procedures

84問 • 1年前

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

Metallic ring test

(1) In nondestructive testing, a discountinuity may be defined as interruption in the normal physical structure or configuration of a part. (2) A discontinuity may or may not affect the usefulness of a part. Regarding the statements,"

Both No. 1 and No. 2 are true.

On a fillet weld, the penetration requirement includes what percentage(s) of the base metal thickness?

25 to 50 percent

The side clearances of piston rings are measured with a

Thickness guage

What metal has special short-time heat properties and is used in the construction of aircraft firewalls?

Titanium alloy

In examining and evaluating a welded joint, a mechanic should be familiar with

Likely ambient exposure and intended use of the part, along with type of weld and original part material composition.

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

AC 43.13-1B

Alclad is a metal consisting of

Pure aluminum surface layers on an aluminum alloy core.

"Which of the following materials may be inspected using the magnetic particle inspection method? 1. Magnesium alloys 2. Aluminum alloys 3. Iron alloys 4. Copper alloys 5. Zinc alloys"

When checking an item with the magnetic particle inspection method, circular and longitudinal magnetization should be used to

Reveal all possible defects

In the four-digit aluminum index system number 2024, the first digit indicates

The major alloying element

To detect a minute crack using dye penetrant inspection usually requires

A longer-than-normal penetrating time

"Which of the following occurs when a mechanical force is repeatedly applied to most metals at room temperature, such as rolling, hammering, or bending? 1. The metals become artificially aged 2. The metals become stress corrosion cracked 3. The metals become cold worked, strain or work hardened."

Why is it considered good practice to normalize a part after welding?

To relieve internal stresses developed within the base metal

Holes and a few projecting globules are found in a weld. What action should be taken?

Remove all the old weld, and reweld the joint

What tool is generally used to calibrate a micrometer or check its accuracy?

Gauge block

Circular magnetization of a part can be used to detect which defects?

Defects parallel to the long axis of the part

Aircraft bolts are usually manufactured with a

Class 3 fit for the threads

The testing medium that is generally used in magnetic particle inspection utilizes a ferromagnetic material that has

High permeability and low retentivity

What is steel tampered after being hardened?

To relieve its internal stresses and reducce its brittleness

Which statement relating to the residual magnetizing inspection method is true?

It may be used with steels which have been heat-treated for stressed application

"Which of the following methods may be suitable to use to detect cracks open to the surface in aluminum forgings and castings? 1. Dye penetration inspection 2. Magnetic particle inspection 3. Metallic ring (coin tap) inspection 4. Eddy current inspection 5. Ultrasonic inspection 6. Visual inspection"

1,4,5,6

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

45°

What is an AN celvis bolt used in an airplane?

Only for shear load applications

A fiber-type, self-locking nut must never be used on an aircraft if the bolt is

Subject to rotation

How is a clevis bolt used with a fork-end cable terminal secured?

With a shear nut tightened to a snug fit, but with no strain imposed on the fork and safe tied with a cotter pin.

"How many of these factors are considered essential knowledge for x-ray exposure? 1. Processing of the film 2. Material thickness and density 3. Exposure distance and angle 4. Film characteristics"

Three

The aluminum code number 1100 identifies what type of aluminum?

99 percent commercially pure aluminum

The pattern for inclusion is a magnetic particle buildup forming

Parallel lines

Which heat-treating operation would be performed when the surface of the metal is changed chemically by introducing a high carbide or nitride content?

Case hardening

"Which of the following defects are not acceptable for metal lines? 1. Cracked flare 2. Seams 3. Dents in the heel of a bend less than 20% of the diameter 4. Scratches/nicks on the inside of a bend less than 10% of wall thickness 5. Dents in a straight section that re 20% of tube diameter"

1,2,3 and 5

One characteristic of a good weld is that no oxide should be formed on the base metal at a distance from the weld of more than

1/2 inch

Magnetic particle inspection is used primarily to detect

Flaws on or near the surface

What defects will be detected by magnetizing a part using continuous longitudinal magnetization with a cable?

Defects perpendicular to the long axis of the part

Which number represents the Vernier scale graduation of a micrometer?

0.0001

"Liquid penetrant inspection methods may be used on which of the following? 1. Porous plastics 2. Ferrous metals 3. Nonferrous metals 4. Smooth primer-sealed wood 5. Non Porous plastics"

2,3,5

The reheating of heat-treated metal, such as with a welding torch

Can significantly alter a metal's properties in the reheated area

Which tool is used to measure the clearance between a surface plate and a relatively narrow surface being checked for flatness?

Thickness gauge

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

Cracking adjacent to the weld

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

Case hardening

What precision measuring tool is used for measuring crankpin and main bearing journals for out-of-round wear?

Micrometer caliper

Unless otherwise specified, torque values for tightening aircraft nuts and bolts relate to

Clean, dry threads

What two types of indicating mediums are available for magnetic particle inspection?

Wet and dry process materials

Under magentic particle inspection, a part wiwll be identified as having a fatigue crack under which condition?

The discontinuity is found in a highly stressed area of the part

If dye penetration indication are not sharp and clear, the most probable cause is that the part

Was not thoroughly washed before the developer was applied

What tool is generally used to set a divider to an exact dimension?

Machinist scale

"(1) An aircraft may be demagnitized by subjecting it to a magnetizing force form alternating current that is gradually reduced in strength (2) An aircraft may be demagnitized by subjecting it to a magnetizing force form direct current that is alternatively reversed in direction and gradually reduced in strength."

Both No. 1 and No. 2 are true

In performing a dye penetrant inspection, the developer

Acts as a blotter to produce a visible indication

One way a part may be demagnetized after magnetic particle inspection is by

Slowly moving the part out of an ac magnetic field of sufficient strength

In magentic particle inspection, a flaw that is perpendicular to the magnetic field flux line generally causes

A large disruption in the magnetic field

Self-locking nuts may be used on an aircraft provided that

The bolt or nut are not subject to rotation

Aircraft bolts with a cross or asterisk marked on the bolthead are

Standard steel bolts

How is the locking feature of the fiber-type locknut obtained?

By the use of an unthreaded fiber locking insert

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

NAS close tolerance bolt

Which of these nondestructive testing methods is suitable for the inspection of most metals, plastics, and ceramics for surface and subsurface defects?

Ultrasonic inspection

What may be used to check the stem on a poppet-type valve for stretch?

Micrometer

How can the dimensional inspection of a bearing in a rocker arm be accomplished?

Telescopic gauge and micrometer

Which statement regarding aircraft bolts is correct?

In general, bolt grip lengths should equal the material thickness

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

Upward, or in a forward direction

What aluminum alloy designations indicate that the metal has received no hardening or tampering treatment?

3003-F

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

Thickness gauge

The core material of Alclad 2024-T4 is

Heat-treated aluminum alloy, and the surface material is commercially pure aluminum.

"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"

1,2

What is descriptive of the annealing process of steel during and after it has been annealed?

Slow cooling; low strength

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

Dial indicator

Why should an aircraft maintenance technician be familiar with weld nomenclature?

In order to gain familiarity with the welding technique, filler material, and temperature range used.

What type of corrosion may attack the grain boundaries of aluminum alloys when the heat treatment process has been improperly accomplished?

Intergranular

What non-destrucctive testing method requires little or no part preparation, is used to detect surface or near-surface defects in most metals, and may also be used to separate metals or alloys sand their heat-treat conditions?

Eddy current inspection

Which of the following is a main determinant of the dwell time to use when conducting a dye or flourescent penetrant inspection?

The size and shape of the discontinuities being looked for

A particular component is attached to the aircraft structure by the use of an aircraft bolt and a castle tension nut combination. If the cotter pin hole does not align within the recommended torque range, the acceptable practice is to

Change washers and try again

Which tool can be used to determine piston pin out-of-round wear?

Micrometer caliper

What method of magnetic particle inspection is used most often to inspect aircraft parts for invisible cracks and other defects?

Continuous

A part which is being prepared for dye pentrant inspection should be cleaned with

A volatile petroleum-base solvent

Which tool is used to find the center of a shaft or othe cylindrical work?

Combination set

Select a characteristic of a good gas weld

The weld should taper off smoothly into the base metal

Generally speaking, bolt grip lengths should be

Equal to the thickness of the material which is fastened together

The twist of a connecting rod is checked by installing push-fit arbors in both ends, supported by aprallel steel bars on a surface plate. Measurements are taken between the arbr and the parellel bar with a

Thickness gauge

Identify the correct statement.

Dividers do not provide a reading when used as a measuring device.

If it is necessary to accurately measure the diameter of a hole approximately 1/4 inch in diameter, the mechanic should use a

Small-hole gauge and determine the size of the hold by taking a micrometer reading of the ball end of the guage

Which material cannot be heat treated repeatedly without harmful effects?

Clad aluminum alloy

The Society of Automotive Engineers (SAE) and the American Iron and Steel Institute use a numerical index system to identify the composition of various steels. In the number '4130' designating chromium-molybdenum steel, the first digit indicates the

Basic alloying ellement

What is generally used in the construction of aircraft exhaust collectors, stacks, and manifolds?

Stainless steel

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

AN corrosion-resistant steel bolt

Normalizing is a process of heat treating

Iron-base metals only

Weekly Test 1

ユーザ名非公開 · 50問 · 13日前

Weekly Test 1