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CM2 BMR > CM Advanced Ch.10 > Flashcards

CM Advanced Ch.10 Flashcards

1
Q

In automotive and construction equipment, what terms describe a method of transmitting power from one place to another through the use of a liquid or gas?

A

Hydraulic or pneumatic

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2
Q

What is that branch of science that deals with the study and use of liquids, as related to the mechanical aspects of physics?

A

Hydraulics

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3
Q

What is that branch of science that deals wit the study and use of air and other gases, as related to the mechanical aspects of physics?

A

Pneumatics

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4
Q

What is the push or pull of an object?

A

Force

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5
Q

What is the amount of force distributed over each unit on the area of an object?

A

Pressure

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6
Q

What is defined as any substance made up of small particles or molecules that have the ability to flow or move easily?

A

Fluid

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7
Q

What is a substance in which the molecules are separated by relatively large spaces?

A

Gas

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8
Q

Who was a noted French physicist who discovered that a closed container of fluid could be used to transfer force from one place to another or to multiply forces by its transmission through a fluid?

A

Pascal

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9
Q

The heart of any hydraulic system is it’s what?

A

Pumps

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10
Q

Gears, lobes, and what else’s are commonly used as elements in rotary pumps?

A

Vanes

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11
Q

What style pump is simple in design and finds wide use in low-pressure hydraulic systems?

A

Gear

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12
Q

What pumps are most commonly used for applications requiring high pressures and accurate control of the discharge volume?

A

Reciprocating

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13
Q

What pump eliminates the need for a system pressure regulator?

A

Variable volume

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14
Q

The piston stoke of the pump is determined by the angle of the what?

A

Cam plate

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15
Q

What transforms fluid pressure into mechanical energy?

A

Hydraulic actuators

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16
Q

What is a device that converts fluid power to linear or straight-line force and motion?

A

Actuating cylinder

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17
Q

What type of cylinder is used primarily for push functions father than pull?

A

Ram

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18
Q

Why type of cylinder is normally used for applications that require both push and pull functions?

A

Piston

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19
Q

Most piston type actuating cylinders are what?

A

Double-acting

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20
Q

What is a device that converts fluid power to rotary motion and force?

A

Fluid power motion

21
Q

The gears of the gear-type motor are of the external type and may be of the spur, helical, or what type of design?

A

Herringbone

22
Q

What is the most common design of the piston type of motor?

A

Axial

23
Q

Once the pump has begun to move the fluid in a hydraulic system, what are usually required to control, monitor, and regulate the operation of the system?

A

Valves

24
Q

What valve is incorporated in most hydraulic systems and acts as a safety valve, used to prevent damage to the system in case of over-pressurization?

A

Relief

25
Q

What valve is designed to remove the system load from the pump once system pressure has been reached?

A

Pressure regulating

26
Q

Selector valves may be actuated mechanically, manually, electrically, hydraulically, or what other way?

A

Pneumatically

27
Q

What valves are probably the most used valves in fluid power systems?

A

Check

28
Q

What is the fluid storehouse for the hydraulic system?

A

Reservoir

29
Q

What are incorporated in some Hydraulic systems to store a volume of liquid under pressure for subsequent conversion into useful work or to absorb rapid fluid pulsations when valves are operated repeatedly?

A

Hydraulic accumulators

30
Q

In the separator Type of air-operated accumulator, Armand is provided to separate the gas from the liquid. The three styles of separators are bladder(bag), diaphragm, and what else?

A

Piston

31
Q

Although there are several different modifications of diaphragm style accumulator, It is usually what in shape?

A

Spherical

32
Q

What part in a hydraulic system is a screening or straining device used to remove impurities from the hydraulic fluid?

A

Filter

33
Q

The most common filter elements used in CESE equipment are wire mesh, micronic, and what else?

A

Porous metal

34
Q

What is a unit of measurement used to express the degree of filtration?

A

Micron

35
Q

A micron equals one millionth of a meter or what amount of an inch?

A

0.0000394

36
Q

The normal lower level of visibility to the naked eye is about how many microns?

A

40

37
Q

When it is used in CESE hydraulic systems, the micronic element normally prevents the passage of solids of how many microns or greater in size?

A

10

38
Q

In many micronic filters, the relief valve is set to open when the differential in pressure exceeds what psi?

A

50

39
Q

How many types of hydraulic systems are used in Support equipment?

A

2

40
Q

Every hydraulic system has two major parts or sections: the power section and the what other section?

A

Actuating

41
Q

What do all hydraulic pumps have on common?

A

Precision construction

42
Q

What contamination class includes such particulars as dust, dirt, core sand weld splatter, machining chips, and rust?

A

Abrasive

43
Q

What products usually called sludge, have no abrasive properties?

A

Oil-oxidation

44
Q

Contaminants created during system operation are of two general types: what are they?

A

Mechanical and chemical

45
Q

What is the chief source of chemical contaminants in hydraulic liquid?

A

Oxidation

46
Q

Hydraulic liquids that have been subjected to excessively high temperatures (above what temperature) break down in substance, leaving minute particles of asphalting suspended in the liquids?

A

250°F

47
Q

One of the most common foreign-fluid contaminants is what?

A

Water

48
Q

What must not be used for flushing hydraulic systems in active service, because of its poor lubricating qualities and it’s contaminating effect on the subsequent till of hydraulic liquid?

A

Diesel fuel oil

CM2 BMR (16 decks)

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