Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
20 Cards in this Set
- Front
- Back
|
What are the two types of fluid lines commonly found in aircraft
|
RIGID metal lines and FLEXIBLE lines
|
|
|
Describe the method of classifying metal tube according to size
|
Wall thickness and OUTSIDE diameter measured in 1/16th increments
|
|
|
When installing stainless steel tubing what type of fitting should be used
|
STAINLESS STEEL FITTINGS
|
|
|
What is the function of the sleeve on a flared tube fitting
|
The nut fits over the sleeve and draws the sleeve and the tubing flare tightly against the male fitting to form the seal
|
|
|
Describe the two types of flares commonly used on aircraft tubing
|
Single flare & Double flare
|
|
|
How can you determine if a fitting is an AN type rather than an AC type
|
AN fittings have a shoulder between the flare cone and the end of the threads.
AC fittings do not. |
|
|
What are the most significant differences between AN and A/C fittings
|
Sleeve length, Thread pitch, and the shoulder between the thread and the flare cone on AN fittings.
|
|
|
What are the names of the parts of a flareless tube fitting?
|
the nut & the ferrule ( SLEEVE )
|
|
|
How do you tell a flareless fitting from a flare type fitting
|
Flareless fittings dont have a flare cone and there is no space between the threads and the end of the fitting
|
|
|
What is the effect of over tightening a flare-type fitting?
|
the sealing surface may be damaged or the flare cut off
|
|
|
In addition to being securely clamped what is an additional requirement for installing metal fuel, oil, and hydraulic lines?
|
The lines must be electrically bonded to the structure
|
|
|
What are some of the important advantages of Teflon tubing
|
1. It is compatible with nearly every liquid
2. has a broad operating temperature range 3. low resistance to fluid flow 4. has a very long shelf and service life |
|
|
Describe identification markings commonly found on flexible hoses
|
1. A LAY LINE
2. identification such a MIL-SPEC number 3. the manufacturer name or symbol 4. the hose Size and Data code. |
|
|
How can you determine if a flexible hose has been correctly or incorrectly installed
|
The Lay Line will be Straight if the hose is properly installed. A twisted lay line indicates incorrect installation
|
|
|
How are flexible hose sizes designated
|
By the INSIDE DIAMETER in 1/16ths increments
|
|
|
What precautions must be observed when deburring the end of a tube after it is cut
|
The wall thickness must not be reduced in size or fractured
|
|
|
Describe the operation of quick disconnect couplings
|
Each half has a valve that is held open when coupled and is spring loaded closed when disconnected.
|
|
|
If you fabricate a replacement for a flexible hose what percentage of the total length must be added to allow for movement under pressure
|
5 to 8 percent
|
|
|
What happens to the tube when a flareless fitting is overtightened
|
The tube is weakened when the nut drives the cutting edge of the sleeve too deeply into the tube
|
|
|
Why are quick disconnect fittings used
|
To provide a quick means to connect or disconnect a fluid line without loss of fluid or entrance of air into the system
|
