FREE AND STUDY GAMES ABOUT AIRCRAFT FLUID LINES

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FREE AND STUDY GAMES ABOUT AIRCRAFT FLUID LINES

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -44 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: What type of tubing is used for high-pressure landing gear and brake lines?

Answer:

corrosion resistant steel (stainless steel) Question 2: I a flexible house made of Buna-N recommended for phosphate ester base (Skydrol) hydraulic fluid?

Answer:

No Question 3: What are three characteristics of Teflon that make it a good material for flexible hoses for aircraft hydraulic installations?

Answer:

• Broad temperature range

• Low resistance to flow

• Less volumetric expansion than rubber

Question 4: What color-code and color-blind symbolos are used to identify a hydraulic line?

Answer:

Blue and yellow bands with bands of circles and the word hydraulics on them Question 5: What is the main disadvantage of using copper tubing for aircraft plumbing?

Answer:

Copper tubing will harden and crystalize when subject to vibration.Question 6: How do you determine what should be used as a replacement tubing in an aircraft hydraulic system?

Answer:

Use the same size and material as the original.Question 7: Is flexible hose made of Butyl material recommended for phosphate ester base hydraulic fluid?

Answer:

Yes Question 8: What information must you have about a piece of tubing other than its outside diameter or material?

Answer:

Wall Thickness Question 9: What operation takes the place of forming a flare when fabricating a flareless tube fitting?

Answer:

Presetting, which consists of forcing a sleeve pilot into the tubing Question 10: Would a piece of 3/4 inch aluminum tubing flattened in the bend to 1/2 inch be considered airworthy?

Answer:

No. Minimum flattening in a bend is 75%. Minimum for this tube is 9/16 inch.

Question 11: What size tubing is classified as number 8?

Answer:

8/16 or 1/2 inch outside diameter Question 12: When testing a certain piece of metal tubing, you find that it is non-magnetic, and nitric acid does not affect it. What material is it?

Answer:

18-8 stainless steel

Question 13: Where should fluid line identification be placed?

Answer:

At each end of the line and once in each compartment Question 14: Name four ways of attaching fluid lines to a component or to another line.

Answer:

• Flared fitting

• Flareless fitting

• Bead and clamp

• Swagged fitting

Question 15: Why must every run of aircraft tubing have at least one bend?

Answer:

To absorb strain on joints, expansion and contraction, and vibrations

Question 16: What color are aluminum alloy AN fittings?

Answer:

Blue Question 17: What procedure may be used to prevent a tube collapsing in a bend if no tubing bender is available?

Answer:

Fill the tube with dry sand and plug both ends for bending

Question 18: What is the correct way to determine that you have the correct hose for replacement purposes?

Answer:

Manufacturer's part number is the final authority Question 19: Is it propper to tighten a flareless fitting to a value beyond its recommended torque in order to stop a drip leak?

Answer:

Never, it will only make it worse Question 20: Should a cushion clamp on a line carrying hydraulic fluid be of the bonded or unbonded type?

Answer:

Use bonded clamps for fluid lines Question 21: What are the distinguishing features between and AN and AC fitting?

Answer:

Flare, colors, shoulder, and thread pitch are different

Question 22: What is meant bye the marking "PHDAN" on a fluid line?

Answer:

Material carried in this line is physically dangerous Question 23: How is Teflon hose checked to determine that it is not kinked excessively?

Answer:

A ball of a specified size is dropped down the tube, if it is excessively twisted it will not pass through.

Question 24: When should flexible house be used for aircraft plumbing?

Answer:

When connecting vibrating parts.Question 25: What type of cushion clamp should be used to support a fluid line carrying Skydrol 500 hydraulic fluid?

Answer:

A teflon cushion clamp