Fluid Power Calculations Flashcards

1
Q

What is fluid power?

A

The use of fluids under pressure to generate, control, and transmit power.

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2
Q

What are the two main types of fluid power systems?

A

Hydraulic and pneumatic systems.

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3
Q

True or False: Pneumatic systems use gas to transmit power.

A

True.

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4
Q

In hydraulic systems, what is the primary working fluid?

A

Liquid, typically oil.

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5
Q

Fill in the blank: The pressure in a hydraulic system is measured in _____ units.

A

Pascal (Pa) or pounds per square inch (psi).

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6
Q

What is the main advantage of pneumatic systems over hydraulic systems?

A

Pneumatic systems are generally cleaner and can operate in environments where oil contamination is a concern.

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7
Q

What is the formula for calculating pressure?

A

Pressure = Force / Area.

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8
Q

What does a vacuum system do?

A

A vacuum system removes air and other gases to create a low-pressure environment.

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9
Q

True or False: Hydraulic systems can provide higher force than pneumatic systems.

A

True.

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10
Q

What is a common application of pneumatic systems?

A

Air-powered tools, such as nail guns and impact wrenches.

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11
Q

What does the term ‘cylinder volume’ refer to in fluid power?

A

The space within a cylinder that is occupied by the fluid.

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12
Q

Fill in the blank: The efficiency of a hydraulic system is typically _____ than that of a pneumatic system.

A

Higher.

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13
Q

What is a hydraulic actuator?

A

A device that converts hydraulic energy into mechanical motion.

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14
Q

Define ‘flow rate’ in the context of fluid power.

A

The volume of fluid that passes through a given point in a system per unit of time.

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15
Q

What is the unit of flow rate in hydraulic systems?

A

Gallons per minute (GPM) or liters per minute (LPM).

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16
Q

True or False: Vacuum pressure is measured in negative pressure units.

A

True.

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17
Q

What is the purpose of a pressure relief valve in a hydraulic system?

A

To prevent excessive pressure buildup that could damage the system.

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18
Q

Fill in the blank: The _____ is a critical component that controls the flow of fluid in a hydraulic circuit.

A

Valve.

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19
Q

What is the relationship between pressure and flow rate in a hydraulic system?

A

Pressure is the driving force that causes flow; higher pressure usually results in higher flow rates.

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20
Q

How do you calculate hydraulic power?

A

Hydraulic Power = Pressure x Flow Rate.

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21
Q

What is the primary disadvantage of pneumatic systems?

A

Lower force output compared to hydraulic systems.

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22
Q

What is a common use for hydraulic power in industry?

A

Operating heavy machinery such as excavators and forklifts.

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23
Q

True or False: Pneumatic systems can be used in explosive environments.

A

True, since they do not use flammable liquids.

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24
Q

What does a vacuum pump do?

A

It removes air and gas from a system to create a vacuum.

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25
Q

What is a common application of vacuum technology?

A

Packaging, where air is removed to prolong shelf life.

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26
Q

Fill in the blank: The _____ of a fluid affects its viscosity.

A

Temperature.

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27
Q

What is the purpose of a hydraulic accumulator?

A

To store energy in the form of hydraulic fluid under pressure.

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28
Q

What does the term ‘cavitation’ refer to in hydraulic systems?

A

The formation of vapor bubbles in a fluid due to low pressure, which can cause damage when they collapse.

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29
Q

How is vacuum pressure typically measured?

A

In inches of mercury (inHg) or millibar (mbar).

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30
Q

What is the role of a filter in a hydraulic system?

A

To remove contaminants from the hydraulic fluid.

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31
Q

True or False: The Bernoulli’s principle applies to both hydraulic and pneumatic systems.

32
Q

What is the ideal gas law equation?

A

PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is temperature.

33
Q

What is the main disadvantage of hydraulic systems?

A

Potential for leaks and fluid contamination.

34
Q

What does ‘actuator’ mean in fluid power systems?

A

A device that converts fluid power into mechanical work.

35
Q

Fill in the blank: A _____ is used to control the direction of fluid flow.

A

Directional control valve.

36
Q

What is the primary purpose of a pressure gauge in a fluid power system?

A

To monitor the pressure of the fluid.

37
Q

How does temperature affect fluid viscosity?

A

As temperature increases, viscosity generally decreases.

38
Q

True or False: The force exerted by a pneumatic cylinder is dependent on the area of the piston and the air pressure.

39
Q

What is the formula for calculating flow velocity?

A

Flow Velocity = Flow Rate / Cross-Sectional Area.

40
Q

What is the function of a check valve in a hydraulic system?

A

To allow fluid to flow in one direction only.

41
Q

Fill in the blank: The _____ is the ratio of the output force to the input force in a hydraulic system.

A

Mechanical advantage.

42
Q

What type of fluid is typically used in hydraulic systems?

A

Hydraulic oil.

43
Q

What is the significance of the Reynolds number in fluid dynamics?

A

It indicates whether flow is laminar or turbulent.

44
Q

True or False: Vacuum systems can be used for material handling applications.

45
Q

What is the primary component of a pneumatic system that converts air pressure into mechanical motion?

A

Pneumatic cylinder.

46
Q

What does the term ‘compressibility’ refer to in fluids?

A

The ability of a fluid to change volume under pressure.

47
Q

Fill in the blank: A _____ is a device that uses fluid pressure to amplify force.

A

Hydraulic jack.

48
Q

What is the purpose of a flow control valve?

A

To regulate the speed of the actuator by controlling the flow rate.

49
Q

What is the effect of increasing the diameter of a hydraulic cylinder?

A

It increases the force output of the cylinder.

50
Q

True or False: The Bernoulli equation can be used to analyze both hydraulic and pneumatic systems.

51
Q

What type of seal is typically used in hydraulic cylinders?

A

O-rings or lip seals.

52
Q

What is the role of a hydraulic pump?

A

To convert mechanical energy into hydraulic energy by moving fluid.

53
Q

Fill in the blank: The _____ is critical for maintaining the pressure in a hydraulic system.

54
Q

What is the primary purpose of a vacuum switch?

A

To monitor and control vacuum levels in a system.

55
Q

What does ‘dynamic pressure’ refer to?

A

The pressure associated with the movement of a fluid.

56
Q

Fill in the blank: The _____ principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure.

A

Bernoulli’s.

57
Q

What is a common material used for pneumatic tubing?

A

Polyurethane or nylon.

58
Q

True or False: Hydraulic systems are typically more complex than pneumatic systems.

59
Q

What is the primary function of a pneumatic filter?

A

To remove moisture and contaminants from compressed air.

60
Q

What is the general formula for calculating hydraulic force?

A

Force = Pressure x Area.

61
Q

Fill in the blank: In fluid power systems, _____ is the force acting on a surface per unit area.

62
Q

What type of valve controls the speed of a hydraulic actuator?

A

Flow control valve.

63
Q

What is the main purpose of a hydraulic filter?

A

To remove contaminants from the hydraulic fluid.

64
Q

True or False: The vacuum level can be measured in absolute or gauge pressure.

65
Q

What does the term ‘fluid dynamics’ refer to?

A

The study of the behavior of fluids in motion.

66
Q

Fill in the blank: The _____ of a fluid is a measure of its resistance to flow.

A

Viscosity.

67
Q

What is the purpose of a pressure switch?

A

To monitor and control the pressure in a fluid power system.

68
Q

What is a common application for hydraulic systems in construction?

A

Excavation and earthmoving equipment.

69
Q

Fill in the blank: In pneumatic systems, _____ is often used to create a vacuum.

A

Compressed air.

70
Q

What does the term ‘static pressure’ refer to?

A

The pressure exerted by a fluid at rest.

71
Q

True or False: Pneumatic systems can be more energy-efficient than hydraulic systems in certain applications.

72
Q

What is the main component of a hydraulic system that provides energy?

A

Hydraulic pump.

73
Q

Fill in the blank: The _____ of a hydraulic system determines how much work can be done.

A

Energy capacity.

74
Q

What is the significance of the orifice in fluid power systems?

A

It controls the flow rate by restricting fluid passage.

75
Q

What type of pump is commonly used in hydraulic systems?

A

Gear pump, vane pump, or piston pump.

76
Q

Fill in the blank: The _____ is a measure of how much a fluid can be compressed.

A

Bulk modulus.