Tapered Pipe Thread Fittings B-06a Quiz

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What is the purpose of using O-rings in some applications instead of aluminium gaskets?

To prevent corrosion

To provide a more secure seal (correct)

To reduce weight in the fluid systems

To allow for easier disassembly

Why is the banjo fitting free to rotate before the bolt is torqued?

To reduce the chances of leaks

To allow for stress-free alignment of the fluid line to the component (correct)

To make it easier to disconnect the fitting

To ensure proper torque application

What is a key feature of quick-disconnect couplings that allows for easy usage?

External lubrication

Complex operation

Self-sealing action (correct)

Threaded connection

Why are quick-disconnect couplings commonly used on fuel, hydraulic, and water/waste servicing adaptors?

To prevent any spillage during connection and disconnection Signup and view all the answers

In what scenario are rubber hose and screw-type hose clamps typically used together?

For large-diameter lines carrying low-pressure fluids Signup and view all the answers

What is the purpose of beading in large-diameter lines?

To hold the rubber hose in place without detachment Signup and view all the answers

How is the type, quarter and year of manufacture, and manufacturer's code identified on most hydraulic hoses?

By using contrasting coloured letters and numerals Signup and view all the answers

What does the 'SKYDROL' marking on a hose indicate?

Suitability for use with phosphate ester-base hydraulic fluid Signup and view all the answers

How is the size of a flexible hose determined?

By its inside diameter in 1/16 inch increments Signup and view all the answers

What does a dash number, such as -10, indicate in hose sizing?

Tube diameter in 1/16 inch increments Signup and view all the answers

Why are code markings used on hydraulic hoses?

To assist in replacing hoses with the same specifications Signup and view all the answers

What is the purpose of lay lines and identification markings on flexible hoses?

To identify the type, quarter and year of manufacture, and manufacturer's code Signup and view all the answers

Why is the design of the reinforcement layers in a hose considered critical?

To minimize dimensional changes when pressure is applied Signup and view all the answers

What is the purpose of the protective outer cover on a hose?

To shield the hose from physical damage Signup and view all the answers

Why is an outer cover often designed as an integral fire-sleeve in high heat areas?

To provide extra protection to the hose Signup and view all the answers

What information is typically displayed on the outer cover of aircraft flexible hoses?

MIL-SPEC number, manufacturer’s name, and dash number Signup and view all the answers

How does the lay line on the outer cover help identify a twisted hose during installation?

The lay line runs straight with no twists when properly installed Signup and view all the answers

Why is it important for an aircraft flexible hose to have its lay line marked clearly?

To identify if the hose is twisted during installation Signup and view all the answers

What should be done with fittings that show signs of damage?

Reject them immediately Signup and view all the answers

What type of fittings have sockets, nipples, and nuts for potential reuse?

Reusable fittings Signup and view all the answers

Why is it advised not to mix components manufactured by different companies?

To ensure the system's integrity Signup and view all the answers

What should be used to cover open ends of disconnected aircraft fluid lines and fittings?

Blanks Signup and view all the answers

What is a key reason for carefully inspecting reusable fittings before reuse?

To detect damage or defects Signup and view all the answers

What does the presence of cracking on the nut indicate about a reusable fitting?

It must be replaced immediately Signup and view all the answers

What type of rubber is used for the inner liner of a high-pressure hose designed to carry Skydrol?

Synthetic Butyl rubber Signup and view all the answers

How is high-pressure hose distinguished from medium-pressure hose?

By the color of the outer braid Signup and view all the answers

What distinguishes a hose designed to carry Skydrol from other high-pressure hoses?

Green outer cover with white lay line Signup and view all the answers

What kind of fittings are hoses using swaged-end fittings assembled with?

Special machinery Signup and view all the answers

Why can fittings with swaged-end fittings not be removed and reused?

They are permanently attached during assembly Signup and view all the answers

How are flexible hose fittings typically classified?

By the attachment method and pressure capacity Signup and view all the answers