hydraulics

35問 • 1年前

問題一覧

What device in a hydraulic system with a constant delivery pump allows circulation of the fluid when no demane are on the system?

Pressure regulator

A fully charged hydraulic accumulator provides

a source for additional hydraulic power when heavy demands are placed on the system.

A hydraulic system referred to as a "power pack" system will

have all hydraulic power components located in one unit.

A hydraulic hose identified as MIL-H-8794 will have a yellow stripe running the length of the hose. This stripe

identifies that the hose is constructed of synthetic rubber and may be suitable for a wide range of applications

An O-ring intended for use in a hydraulic system using MIL-H-5606 (mineral base) fluid will be marked with

a blue stripe or dot

What conditions would most likely cause excessive fluctuation of the pressure gauge when the hydraulic pump is operating?

inadequate supply of fluid

A filter incorporating specially treated cellulose paper is identified as a

micronic filter

The purpose of an orifice check valve is to

relieve pressure in one direction and prevent flow in the other direction

To protect packing rings or seals from damage when it is necessary to install them over or inside threaded sections, the

threaded section should be covered with a suitable sleeve

To prevent external and internal leakage in aircraft hydraulic units, the most commonly used type of seal is the

O ring seal

Which allow free fluid flow in One Direction and no fluid flow in the other direction

Check valve

Select the valve used in a hydraulic system that directs pressurized fluid to one end of an activated cylinder and simultaneously is the right return fluid to the reservoir from the other end

Selector

What function does the absolute pressure regulator perform in the pneumatic power system?

Regulate the Compressor in light air to provide a stabilized source of air for The compressor

1. relief valves are used in pneumatic system as damage prevented units 2. Check valves are using both hydraulic and pneumatic systems.

Both number 1 and number 2 or true

One of distinguishes characteristics of an open center selective valve using hydraulic system is that

Fluid flows through the valve in the off Position

What type of package should be used in hydraulic component to be installed in the system containing skydrol?

Packing materials made for ester base fluid

Relief valves are used in pneumatic systems

As damage preventing unit

An aircraft pneumatic system which incorporates an engine driven multi stage reciprocate, and compressor also requires

A moisture separator

The removal of air from an aircraft hydraulic system is generally accomplished

By operating the various hydraulic component through several cycles

Pneumatic system utilize

Relief valves

The component in the hydraulic system that is used to direct the flow of fluid is the

selector valve

What type of selective valve is one of the most commonly used in hydraulic system to provide for stimulus flow of fluid into and out of a connected actuating unit?

four Port, Closed Center valve

What is the purpose of using back up rings with O-ring and hydraulic system above 1500 psi

Prevent high-pressure for extruding the seal between the moveing and stationary parts

The purpose of the pressure regulator in the hydraulic system is to

Maintain system operating pressure within a predetermined range and to unload the pump

A flexible, sealant element subject to motion is a

Packing

Which characteristics apply to aircraft hydraulic systems? 1. minimum maintenance requirements. 2. lightweight. 3. About 80% operated efficiency (20% loss due to fluid friction) 4. simple to inspect

1,2,4

If a rigid tube is too short for the flare to reach its seat before tightening, pulling it into a place by tightening

May distort the flare

The installation of a new metal hydraulic line should be made with

enough bands to allow the tool to expand and contract with temperature changes and to absorb vibration

Extraction of an o ring is prevented in a high-pressure system by the use of a

O ring on the side of the o ring away from the pressure

What is one advantage of hydraulic motors over electric motors

There is no fire hazard if the motor is stalled

Generally, the first step and removing an accumulator from an aircraft is to

Relief system pressure

Which fitting is an AN flared tube fitting

Which Illustration shows the correct spiral for Teflon backup rings

1 and 3

If a Hydraulic brake system uses neoprene, rubber, packing materials, the correct hydraulic fluid to service The system is.

Mineral base oil

The internal resistance of a fluid which tends to prevent it from flowing is called

viscosity