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2AX5X > Vol.2 > Flashcards

Vol.2 Flashcards

1
Q

What are the three states of matter?

A

Solids, liquids, and gases

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2
Q

When any force causes a solid to change permanently, the solid is said to have what?

A

Passed the elastic limit

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3
Q

What is the most outstanding characteristic of a liquid?

A

It’s ability to conform to the shape of its container

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4
Q

What usually produces flow in a pneudraulic system?

A

Piston pushing the fluid

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5
Q

Who was among the first to study the compressibility of gases?

A

Boyle

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6
Q

If 50 psi of cylinder pressure acts on a 5 square-inch piston head, what will the resulting force be?

A

250 pounds

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7
Q

When a 8 square-inch piston moves 5 inches within a cylinder, what volume of liquid is displaced?

A

40 cubic inches

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8
Q

How does turbulence affect fluid-flow in a hydraulic line?

A

By creating resistance and loss of energy

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9
Q

What is a tube whose cross section area is gradually reduced to a smaller size diameter called?

A

Venturi

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10
Q

What are the purposes of a hydraulic reservoir?

A

Replenish fluid, allow for thermal expansion, and provide a means of bleeding air from the system

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11
Q

What is the purpose of a standpipe in a reservoir?

A

Reserve fluid for the emergency pump

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12
Q

What is the amount of fluid a pump produces on each cycle or revolution called?

A

Displacement

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13
Q

When referring to hydraulic hand pumps, what does double-action mean?

A

Fluid-flow is created with each stroke of the pump handle

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14
Q

Why do variable-volume pumps not require a separate pressure-regulating device in the system?

A

They have an integral compensator

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15
Q

What provides for cooler operation in a Stratopower variable-volume hydraulic pump?

A

Creep plates

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16
Q

In the Stratopower variable-volume pump, what holds the piston in contact with the cam plate?

A

Nutating plate

17
Q

What does a hydraulic motor convert hydraulic pressure into?

A

Rotary mechanical motion

18
Q

How is the piston installed in an accumulator?

A

Hollow end towards the air side of the accumulator

19
Q

What is the size of one micron?

A

Four millionths of an inch

20
Q

In a hydraulic system, what does a hydraulic manifold provide?

A

A location where common fluid lines can come together

21
Q

What does an actuating cylinder transform fluid pressure into?

A

A mechanical force

22
Q

What pneudraulic system component uses a single-acting actuating cylinder?

A

Brake assembly

23
Q

What pneudraulic system component uses a double-acting balanced actuating cylinder?

A

Nosewheel steering

24
Q

Which actuator type slows down piston travel when the piston nears either end of the cylinder?

A

Internal snubber

25
Q

A manual poppet-type selector valve is in the working position when the camshaft is rotated to what position?

A

To unseat one pressure poppet and one return poppet

26
Q

What is the major advantage of the manual slide-type hydraulic selector valve?

A

Metering ability

27
Q

Normally, what positions hydraulic selector valves?

A

Solenoid

28
Q

What is the advantage of an electrically controlled solenoid valve?

A

Reduced weight

29
Q

What is the difference between a selector valve and a servo valve?

A

A servo valve controls fluid-flow

30
Q

What is another name for a flapper check valve?

A

Gate check valve

31
Q

What is the purpose of the arrow on a check valve?

A

Show the direction of free-flow through the valve

32
Q

What check valve allows for normal operating speed of a hydraulic actuator in one direction while limiting speed in the other direction?

A

Restrictor check valve

33
Q

What are the basic units of a hydraulic hand pump system?

A

Reservoir, pump, actuator, and manual shut off valve

34
Q

How does a reservoir supply hydraulic fluid to a hand pump?

A

By gravity and the suction effect of the pump

35
Q

What happens to fluid flow when the pressure in a hydraulic system with variable-volume pump increases

A

Decreases

2AX5X (13 decks)

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