Fluid lines and Fitting

What is the color code for fluid lines carrying fuel?

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

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

When presetting flareless fittings on 3/8 inch aluminum alloy tubing, the nut should be turned ______ turn(s) after the ferrule is tight against the presetting tube.

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

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

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 hold 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. Tighten the clamp bar securely to prevent slippage.
6. Center the plunger or flaring pin over the tube.

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

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

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

45 degree flares are used for what kind of fittings?

Metal tubing fluid lines are sized by wall thickness and

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

Which statement is true regarding flattening of tubing in bends?

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

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?

What is the color code for fluid lines carrying fire extinguishing agent?

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

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

What is the color code for fluid lines carrying hydraulic fluid?

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

Flexible lines must be installed with

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

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

In metal tubing installations,

The term 'cold flow' is generally associated with

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

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

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.

Every tubing installation must have at least one bend to

Which coupling nut should be selected for use with 1/2-inch aluminum oil lines which are to be assembled using flared tube ends and standard AN nuts, sleeves, and fittings?

Flexible lines must be installed with

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

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

To find the inside diameter of rigid tubing, twice the wall thickness must be subtracted from the _______ diameter.

What is the maximum outside diameter of soft aluminum tubing that can be double-flared?

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

High-pressure oxygen is typically carried in a stainless steel line.

Metal tubing fluid lines are sized by wall thickness and

What process is necessary prior to installing new flareless fittings?

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