FLUID LINES & FITTINGS

35問 • 1年前

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通報

問題一覧

Flexible lines must be installed with

A slack of 5 to 8 percent of the length

Hydraulic tubing, which is damaged in a localized area to such an extent that repair is necessary, may be repaired

By cutting out the damaged area and utilizing a swaged tube fitting to join the tube ends

Rolling-type flaring Tools are used to flare X, X, and X tubing

Soft copper, aluminum, brass

If a flared tube coupling nut is overtightened, where is the tube most likely to be weakened/damaged?

At the sleeve and flare junction

The maximum distance between end fittings to which a straight hose assembly is to be connected is 50 inches. The minimum hose length to make such a connection should be

52-1/2 inches

Which statement (s) about Military Standard (MS) flareless fittings is/are correct? 1. During installation, MS flareless fittings are normally tightened by turning the nut a specified amount, rather than being torqued 2. New MS flareless tubing/fittings should be assembled clean and dry without lubrication 3. During installation, MS flareless fittings are normally tightened by applying a specified torque to the nut

Which statement is true regarding flattening of tubing in bends?

Flattening by not more than 25 percent of the original diameter is permissible

From the following sequences of steps, indicate the proper order you would use to make a single flare on a piece of tubing 1. Place the tube in the proper size hole in the flaring block 2. Project the end of the tube slightly from the top of the flaring tool, about the thickness of a dime 3. Slip the fitting nut and sleeve on the tube 4. Strike the plunger several light blows with a lightweight hammer or mallet and turn the plunger one-half turn after each blow 5. Tightened the clamp bar securely to prevent slippage 6. Center the plunger or flaring pin over the tube

3,1,6,2,5,4

A gas or fluid line marked with the letters PHDAN is

Used to carry a hazardous substance

Which coupling nut should be selected for use with ½ -inch aluminum oil lines which are to be assembled using flared tube ends and standard AN nuts, sleeves, and fittings?

AN-818-8

Which statement concerning Bernoulli’s principle is true?

The pressure of a fluid decreases at points where the velocity of the fluid increases

In most aircraft hydraulic systems, two-piece tube connectors consisting of a sleeve and a nut are used when a tubing flare is required. The use of this type connector eliminates

The possibility of reducing the flare thickness by wiping or ironing during the tightening process

Which of the following hose materials are compatible with phosphate-ester base hydraulic fluids? 1. Butyl 2. Teflon 3. Buna-N 4. Neoprene

1 and 2

The primary purpose of providing suitable bends in fluid and pneumatic metal tubing runs is to

Prevent excessing stress on the tubing

What is the color of an AN steel flared-tube fitting

Black

The material specifications for a certain aircraft require that a replacement oil line be fabricated from 3/4 –inch 0.072 5052-0 aluminum alloy tubing. What is the inside dimension of this tubing?

0.606 inch

Which tubings have the characteristics (high strength, abrasion resistance) necessary for use in a high-pressure (3,000 PSI) hydraulic system for operation of landing gear and flaps?

Corrosion-resistant steel annealed or 1/4H

Metal tubing fluid lines are sized by wall thickness and

Outside diameter in 1/16 inch increments

(1) Bonded clamps are used for support when installing metal tubing (2) Unbonded clamps are used for support when installing wiring Regarding the above statements,

Both No.1 and No.2 are true

What is an advantage of a double flare on aluminum tubing?

More resistant to damage when the joint is tightened

A 3/8 aircraft high pressure flexible hose as compared to 3/8 inch metal tubing used in the same system will

Have equivalent flow characteristics

When flaring aluminum tubing for use AN fittings, the flare angle must be

37°

Scratches or nicks on the straight portion of aluminum alloy tubing may be repaired if they are no deeper than

10 percent of the wall thickness

When installing bonded clamps to support metal tubing

Remove paint or anodizing from tube at clamp location

Which of the following statements is true regarding minimum allowable bend radii for 1.5 inches OD or less aluminum alloy and steel tubing of the same size?

The minimum radius for steel is greater than for aluminum

Excessive stress on fluid or pneumatic metal tubing caused by expansion and contraction due to temperature changes can best be avoided by

Providing bends in the tubing

Which statement is true regarding the variety of symbols utilized on the identifying color-code bands that are currently used on aircraft plumbing lines

symbols are always black against a white background regardless of line content

Which of the following statements is/are correct in reference to flare fittings? 1. AN fittings have an identifying shoulder between the end of the threads and the flare cone 2. AC and AN fittings are considered identical except for material composition and identifying colors 3. AN fittings are generally interchangeable with AC fittings of compatible material composition

The term ‘cold flow’ is generally associated with

Impressions left in natural or synthetic rubber hose material

When a Teflon hose has been in service for a time, what condition may have occurred and/or what precautions should be taken when it is temporarily removed from the aircraft?

The hose may have developed a set, or have been manufactured with a pre-set shape, and must be supported to maintain its shape

A scratch or nick in aluminum tubing can be repaired provided it does not

Appear in the heel of a bend

A certain amount of slack must be left in a flexible hose during installation because, when under pressure, it

Contracts in length and expands in diameter

In a metal tubing installation,

Tension is undesirable because pressurization will cause it to expand and shift

The best tool to use when cutting aluminum tubing, or any tubing of moderately soft metal is a

Hand operated wheel-type cutter

Flexible hose used in aircraft systems is classified in size according to the

Inside diameter

airlaw

airlaw

pcar & afcar

pcar & afcar

new set

new set

human factor

human factor

human factor 2

human factor 2

Engine instrument system

ユーザ名非公開 · 54問 · 1年前

Engine instrument system

Propellers

Propellers

Propellers (2)

Propellers (2)

Induction and engine airflow system

ユーザ名非公開 · 42問 · 1年前

Induction and engine airflow system

42問 • 1年前

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Ignition starting system

ユーザ名非公開 · 100問 · 1年前

Ignition starting system

100問 • 1年前

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Ignition starting system (2)

ユーザ名非公開 · 29問 · 1年前

Ignition starting system (2)

Auxiliary power unit

Auxiliary power unit

Reciprocating engines

ユーザ名非公開 · 100問 · 1年前

Reciprocating engines

Turbine engines

Turbine engines

Turbine engines (2)

Turbine engines (2)

Fuel metering systems

ユーザ名非公開 · 98問 · 1年前

Fuel metering systems

98問 • 1年前

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Aircraft landing gear system

ユーザ名非公開 · 79問 · 1年前

Aircraft landing gear system

79問 • 1年前

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Sheetmetal & Non sheetmetalic structure

ユーザ名非公開 · 100問 · 1年前

Sheetmetal & Non sheetmetalic structure

100問 • 1年前

ユーザ名非公開

Sheetmetal and non sheetmetalic structure

ユーザ名非公開 · 30問 · 1年前

Sheetmetal and non sheetmetalic structure

Aircraft fuel system

Aircraft fuel system

問題一覧

Flexible lines must be installed with

A slack of 5 to 8 percent of the length

Hydraulic tubing, which is damaged in a localized area to such an extent that repair is necessary, may be repaired

By cutting out the damaged area and utilizing a swaged tube fitting to join the tube ends

Rolling-type flaring Tools are used to flare X, X, and X tubing

Soft copper, aluminum, brass

If a flared tube coupling nut is overtightened, where is the tube most likely to be weakened/damaged?

At the sleeve and flare junction

The maximum distance between end fittings to which a straight hose assembly is to be connected is 50 inches. The minimum hose length to make such a connection should be

52-1/2 inches

Which statement is true regarding flattening of tubing in bends?

Flattening by not more than 25 percent of the original diameter is permissible

3,1,6,2,5,4

A gas or fluid line marked with the letters PHDAN is

Used to carry a hazardous substance

Which coupling nut should be selected for use with ½ -inch aluminum oil lines which are to be assembled using flared tube ends and standard AN nuts, sleeves, and fittings?

AN-818-8

Which statement concerning Bernoulli’s principle is true?

The pressure of a fluid decreases at points where the velocity of the fluid increases

In most aircraft hydraulic systems, two-piece tube connectors consisting of a sleeve and a nut are used when a tubing flare is required. The use of this type connector eliminates

The possibility of reducing the flare thickness by wiping or ironing during the tightening process

Which of the following hose materials are compatible with phosphate-ester base hydraulic fluids? 1. Butyl 2. Teflon 3. Buna-N 4. Neoprene

1 and 2

The primary purpose of providing suitable bends in fluid and pneumatic metal tubing runs is to

Prevent excessing stress on the tubing

What is the color of an AN steel flared-tube fitting

Black

The material specifications for a certain aircraft require that a replacement oil line be fabricated from 3/4 –inch 0.072 5052-0 aluminum alloy tubing. What is the inside dimension of this tubing?

0.606 inch

Which tubings have the characteristics (high strength, abrasion resistance) necessary for use in a high-pressure (3,000 PSI) hydraulic system for operation of landing gear and flaps?

Corrosion-resistant steel annealed or 1/4H

Metal tubing fluid lines are sized by wall thickness and

Outside diameter in 1/16 inch increments

(1) Bonded clamps are used for support when installing metal tubing (2) Unbonded clamps are used for support when installing wiring Regarding the above statements,

Both No.1 and No.2 are true

What is an advantage of a double flare on aluminum tubing?

More resistant to damage when the joint is tightened

A 3/8 aircraft high pressure flexible hose as compared to 3/8 inch metal tubing used in the same system will

Have equivalent flow characteristics

When flaring aluminum tubing for use AN fittings, the flare angle must be

37°

Scratches or nicks on the straight portion of aluminum alloy tubing may be repaired if they are no deeper than

10 percent of the wall thickness

When installing bonded clamps to support metal tubing

Remove paint or anodizing from tube at clamp location

Which of the following statements is true regarding minimum allowable bend radii for 1.5 inches OD or less aluminum alloy and steel tubing of the same size?

The minimum radius for steel is greater than for aluminum

Excessive stress on fluid or pneumatic metal tubing caused by expansion and contraction due to temperature changes can best be avoided by

Providing bends in the tubing

Which statement is true regarding the variety of symbols utilized on the identifying color-code bands that are currently used on aircraft plumbing lines

symbols are always black against a white background regardless of line content

The term ‘cold flow’ is generally associated with

Impressions left in natural or synthetic rubber hose material

When a Teflon hose has been in service for a time, what condition may have occurred and/or what precautions should be taken when it is temporarily removed from the aircraft?

The hose may have developed a set, or have been manufactured with a pre-set shape, and must be supported to maintain its shape

A scratch or nick in aluminum tubing can be repaired provided it does not

Appear in the heel of a bend

A certain amount of slack must be left in a flexible hose during installation because, when under pressure, it

Contracts in length and expands in diameter

In a metal tubing installation,

Tension is undesirable because pressurization will cause it to expand and shift

The best tool to use when cutting aluminum tubing, or any tubing of moderately soft metal is a

Hand operated wheel-type cutter

Flexible hose used in aircraft systems is classified in size according to the

Inside diameter