NATSCI PT2

82問 • 2年前

問題一覧

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

Upward, or in a forward direction

(1) An aircraft part may be demagnetized by subjecting it to a magnetizing force from alternating current that is gradually reduced in strength (2) An aircraft part may be demagnetized by subjecting it to a magnetizing force from direct current that is alternately reversed in direction and gradually reduced in strength Regarding the above statements,

Both No. 1 and No. 2 are true

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 element

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

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

What is steel tempered after being hardened

To relieve its internal stresses and reduce its brittleness

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

Cracking adjacent to the weld

Which material cannot be heat treated repeatedly without harmful effects?

Clad aluminum alloy

Which number represents the Vernier scale graduation of a micrometer?

.0001

Identify the correct statement

Dividers do not provide a reading when used as measuring device

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

½ inch

What is generally used in the construction of aircraft engine firewalls?

Stainless steel

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

To relieve internal stresses developed within the base metal

Aircraft bolts are usually manufactured with a

Class 3 fit for the threads

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

Subject to rotation

The aluminum code number 1100 identifies what type of aluminum

99 percent commercially pure aluminum

Magnetic particle inspection is used primarily to detect

Flaws on or near the surface

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

Thickness gauge

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

45•

Where is an AN clevis bolt used in an airplane

Only for shear load applications

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

A large disruption in the magnetic field

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

Intergranular

Select a characteristics of a good gas weld

The weld should taper off smoothly into the base metal

The twist of a connecting rod is checked by installing push-fit arbors in both ends, supported by parallel steel bars on a surface plate. Measurements are taken between the arbor and the parallel bar 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 tool is used to measure the clearance between a surface plate and a relatively narrow surface being checked for flatness?

Thickness gauge

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

Gauge block

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

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

High permeability and low retentivity

To detect a minute crack using dye penetrant inspection usually requires

A longer-than-normal penetrating time

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?

Metallic ring test

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

Micrometer

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

Defects perpendicular to the axis of the part

Which of the following methods may be suitable to use to detect cracks open to the surface in aluminum forgings and castings? 1. Dye penetrant 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

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

Telescopic gauge and micrometer

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

Dial indicator

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

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

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. Nonporous plastics

2,3,5

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

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

Standard steel bolts

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

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

Combination set

Normalizing is a process of heat treating

Iron-base metal only

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

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

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

Titanium alloy

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

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

The pattern for an inclusion is a magnetic particle build up forming

Parallel lines

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

The major alloying element

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

AN corrosion-resistant steel bolt

A part which is being prepared for dye penetrant inspection should be clean with

A volatile petroleum-based solvent

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

Machinist scale

Which statement concerning heat and/or temperature is true?

Temperature is a measure of the kinetic energy of the molecules of any substance

The boiling point of a given liquid varies

Directly with pressure

If a double acting actuating cylinder in a 3000 psi system has a piston with a surface rea of three square inches on the extension side, and a rod with a cross-section area of one square inch attached to the piston on the other side, approximately how much force will the actuator be able to produce when retracting?

6,000 pounds

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

Relative humidity

An airplane wing is designed to produce lift resulting from

Positive air pressure below the wing’s surface and negative air pressure above the wing’s surface along with the downward deflection of air.

If the volume of a confined gas is doubled (without the addition of more gas), the pressure will (assume the temperature remains constant)

Be reduced to one half its original value

If all or a significant part of a stall strip is missing on an airplane wing, a likely result will be.

Asymmetrical lateral control at a near stall angles of attack

If the temperature of a confined liquid is held constant and its pressure is tripled, the volume will

Remain the same

Which atmospheric conditions will cause the true landing speed of an aircraft to be the greatest?

High temperature with high humidity

Which of the following is newton’s first law of motion, generally termed the law of inertia

Everybody persists in its state of rest, or of motion in a straight line, unless acted upon by some force.

Which of the following is NOT considered a method of heat transfer?

Diffusion

Which will weigh the least?

35 parts of dry air and 65 parts of water vapor

Aspect ratio of a wing is defined as the ratio of the

Wingspan to the mean chord

Under which conditions will the rate of flow of a liquid through a metering orifice (or jet) be the greatest (all other factors being equal)?

Unmetered pressure, 17 PSI; metered pressure, 5 PSI; atmospheric pressure, 14.7 PSI

Which condition is actual amount of water vapor in a mixture of air and water?

Absolute humidity

In physics, which of the following factors are necessary to determine power? 1. Force exerted 2. Distance moved 3. Time required

1,2,3

The speed of sound in the atmosphere is most affected by variations in which of the following?

Ambient temperature

The desire effect of using winglets on an aircraft’s wingtips is to

Increase the lift to drag ratio

If the fluid pressure is 800 psi in a ½ inch line supplying an actuating cylinder with a piston area of 10 square inches, the force exerted on the piston will be

8000 pounds

Temperature is a measure of the potential If both the volume and the absolute temperature of a confined gas are doubled, the pressure will

Not change

The purpose of stall strips on airplane wings is to

Ensure that the wing root areas stall first

A wing with very high aspect ratio (in comparison with low aspect ratio wing) will have

Increased drag at high angles of attack

How much work input is required to lower (not drop) a 120 pound weight from the top of a 3 foot table to the floor.

360 foot-pounds

What force must be applied to roll a 120 pound barrel up an inclined plane 9 feet long to a height of 3 feet (disregard friction)? L ÷ I = R ÷ E L = length of ramp, measured along the slope I = height of ramp R = weight of object to be raised or lowered. E = Force required to raise or lower object

40 pounds

The temperature to which humid air must be cooled at constant pressure to become saturated is called

Dew point

What is absolute humidity?

The actual amount of the water vapor in a mixture of air and water.

The purpose of aircraft wing dihedral is to

Increase lateral stability

The speed of sound in the atmosphere

Changes with a change in temperature

An engine that weighs 350 pounds is removed from an aircraft by means of a mobile hoist. The engine is raised 3 feet above its attachment mount, and the entire assembly is then moved forward 12 feet. Constant force of 70 pounds is required to move the loaded hoist. What is the total work input required to move the hoist?

840 foot pounds

HUMAN PERFORMANCE

Karl Nadera · 83問 · 2年前

HUMAN PERFORMANCE

83問 • 2年前

Karl Nadera

AIRLAW

Karl Nadera · 100問 · 2年前

AIRLAW

100問 • 2年前

Karl Nadera

AIRLAW PT 2

Karl Nadera · 89問 · 2年前

AIRLAW PT 2

89問 • 2年前

Karl Nadera

NATSCI

Karl Nadera · 100問 · 2年前

NATSCI

100問 • 2年前

Karl Nadera

問題一覧

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

Upward, or in a forward direction

Both No. 1 and No. 2 are true

Basic alloying element

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

What is steel tempered after being hardened

To relieve its internal stresses and reduce its brittleness

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

Cracking adjacent to the weld

Which material cannot be heat treated repeatedly without harmful effects?

Clad aluminum alloy

Which number represents the Vernier scale graduation of a micrometer?

.0001

Identify the correct statement

Dividers do not provide a reading when used as measuring device

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

½ inch

What is generally used in the construction of aircraft engine firewalls?

Stainless steel

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

To relieve internal stresses developed within the base metal

Aircraft bolts are usually manufactured with a

Class 3 fit for the threads

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

Subject to rotation

The aluminum code number 1100 identifies what type of aluminum

99 percent commercially pure aluminum

Magnetic particle inspection is used primarily to detect

Flaws on or near the surface

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

Thickness gauge

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

45•

Where is an AN clevis bolt used in an airplane

Only for shear load applications

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

A large disruption in the magnetic field

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

Intergranular

Select a characteristics of a good gas weld

The weld should taper off smoothly into the base metal

Thickness gauge

The core material of Alclad 2024-T4 is

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

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

Thickness gauge

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

Gauge block

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

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

High permeability and low retentivity

To detect a minute crack using dye penetrant inspection usually requires

A longer-than-normal penetrating time

Metallic ring test

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

Micrometer

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

Defects perpendicular to the axis of the part

1,4,5,6

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

Telescopic gauge and micrometer

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

Dial indicator

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

Change washers and try again

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. Nonporous plastics

2,3,5

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

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

Standard steel bolts

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

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

Combination set

Normalizing is a process of heat treating

Iron-base metal only

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

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

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

Titanium alloy

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

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

The pattern for an inclusion is a magnetic particle build up forming

Parallel lines

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

The major alloying element

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

AN corrosion-resistant steel bolt

A part which is being prepared for dye penetrant inspection should be clean with

A volatile petroleum-based solvent

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

Machinist scale

Which statement concerning heat and/or temperature is true?

Temperature is a measure of the kinetic energy of the molecules of any substance

The boiling point of a given liquid varies

Directly with pressure

6,000 pounds

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

Relative humidity

An airplane wing is designed to produce lift resulting from

Positive air pressure below the wing’s surface and negative air pressure above the wing’s surface along with the downward deflection of air.

If the volume of a confined gas is doubled (without the addition of more gas), the pressure will (assume the temperature remains constant)

Be reduced to one half its original value

If all or a significant part of a stall strip is missing on an airplane wing, a likely result will be.

Asymmetrical lateral control at a near stall angles of attack

If the temperature of a confined liquid is held constant and its pressure is tripled, the volume will

Remain the same

Which atmospheric conditions will cause the true landing speed of an aircraft to be the greatest?

High temperature with high humidity

Which of the following is newton’s first law of motion, generally termed the law of inertia

Everybody persists in its state of rest, or of motion in a straight line, unless acted upon by some force.

Which of the following is NOT considered a method of heat transfer?

Diffusion

Which will weigh the least?

35 parts of dry air and 65 parts of water vapor

Aspect ratio of a wing is defined as the ratio of the

Wingspan to the mean chord

Under which conditions will the rate of flow of a liquid through a metering orifice (or jet) be the greatest (all other factors being equal)?

Unmetered pressure, 17 PSI; metered pressure, 5 PSI; atmospheric pressure, 14.7 PSI

Which condition is actual amount of water vapor in a mixture of air and water?

Absolute humidity

In physics, which of the following factors are necessary to determine power? 1. Force exerted 2. Distance moved 3. Time required

1,2,3

The speed of sound in the atmosphere is most affected by variations in which of the following?

Ambient temperature

The desire effect of using winglets on an aircraft’s wingtips is to

Increase the lift to drag ratio

If the fluid pressure is 800 psi in a ½ inch line supplying an actuating cylinder with a piston area of 10 square inches, the force exerted on the piston will be

8000 pounds

Temperature is a measure of the potential If both the volume and the absolute temperature of a confined gas are doubled, the pressure will

Not change

The purpose of stall strips on airplane wings is to

Ensure that the wing root areas stall first

A wing with very high aspect ratio (in comparison with low aspect ratio wing) will have

Increased drag at high angles of attack

How much work input is required to lower (not drop) a 120 pound weight from the top of a 3 foot table to the floor.

360 foot-pounds

40 pounds

The temperature to which humid air must be cooled at constant pressure to become saturated is called

Dew point

What is absolute humidity?

The actual amount of the water vapor in a mixture of air and water.

The purpose of aircraft wing dihedral is to

Increase lateral stability

The speed of sound in the atmosphere

Changes with a change in temperature

840 foot pounds