Fluid Mech 1.2

68問 • 2年前

問題一覧

It is the only industrialized country that has not yet fully converted to the Metric system

United States

The metric SI system is also known as ?

International system

It is a simple and logical system, based on decimal relationship between the various units and is being used for scientific and engineering work in most of the industrialized nations, including England

What year does the metric system developed?

1790

Who developed metric system That aimed for a universally acceptable unit system

French National Assembly

Where does the early version of metric system developed?

France

How many nations signed the metric convention treaty that is not universally accepted until 1875

Units name to be written without capitalization, except for ?

Proper names

When does the adoption of metric system in the US began

1968

What act of metric system began in 1968 and what act followed by this in 1975

Metric Study Act, followed by the Metric Conversion Act

What year does the federal agencies were mandated to convert the metric system?

September 1992

It is based on a decimal relationship between units

SI prefixes

If this is zodiac sign in which the pound symbol comes from this where, in ancient Roman, it means a unit of weight

Libra

When weight is forced due to gravity, mass remains what

Constant

It is defined as forced times distance where it has a unit of Joule

Work

What is the unit of energy?

BTU or British thermal unit

How many kilojoules are there in one BTU

1.0551 kJ

What is the unit of power?

J/s

What is the common unit for power?

Horsepower(hp)

How many watts are there in a horsepower?

745.7 W

how many kilojoules are there in a Kilowatt hour

3600 kJ

All non-primary units are also known as secondary units can be formed by combinations of what

Primary units

an engineering device or process can be studied through what ?

Experimental or analytical

It is an approach use in modeling engineering problems that has the advantage that we deal with the actual physical system, and a required quantity is determined by measurement within the limits of experimental error

Experimental approach

It is an approach that is expensive time, consuming and often impractical

Experimental approach

it is an approach, including the numerical approach that has the advantage that it is fast And inexpensive but the results obtained are subject. Accuracy of the assumptions, approximations and idealizations made in the analysis.

Analytical approach

It is sometimes called streamline flow

Laminar flow

fluids travel smoothly or regular path

Laminar flow

The layers of fluid seem to slide by one another without Swirl presentant

Laminar flow

The velocity pressure and other flow properties at each point remain constant

Laminator flow

It is a swirling of a fluid, and the reverse current created when the fluid is in turbulent flow

Eddy

It is a fluid flow undergo, irregular fluctuations or mixing

Turbulent flow

The fluid at the point is continuously undergoing changes in both magnitude and direction

Turbulent flow

They are present giving the fluid of fluctuating nature

Eddies

He was an Irish mathematician and physicist, best known for introducing the Reynolds number, classifying fluid flow

Osborne Reynolds

Is a fluid motion, characterize by chaotic changes in pressure and flow velocity

Turbulent flow

It helps to predict if the flow is laminar or turbulent and it is dimensionless

Reynolds number

What number where we say that the flow is laminar?

less than 2100

What number where we can say that the flow is turbulent ?

greater than 4000

What do you call a flow if it is greater than 2100 but it is less than than 4000 of Reynolds number?

Transitional flow

According to this law, whenever an external static pressure applied on any part of the fluid contained in a vessel, it is transmitted evenly throughout the liquid in all directions

Pascal’s law

What is the formula in finding the force?

Force is equivalent to pressure times the area

What is the scientific gravity of mercury?

13.534

Scientific gravity of Xenon

3.05

Scientific gravity of neon

0.9

Scientific gravity of argon

1.784

Scientific gravity of Bromite

3.112

Scientific gravity of nitrogen

1.251

Scientific gravity of radon

9.73

Scientific gravity of oxygen

1.429

Scientific gravity of fluorine

1.692

Scientific gravity of krypton

3.75

Scientific gravity of helium

0.1 785

Scientific gravity of chlorine

3.214

Scientific gravity of hydrogen

0.0899

Density of mercury

13,534 kg/m³

Density of Xenon

3050 kg/m³

Density of neon

1251 kg/m³

Density of argon

1784 kg/m³

Density of Bromite

3112 kg/m³

Density of nitrogen

1251 kg/m³

Density of radon

9730 kg/m³

Density of oxygen

1429 kg/m³

Density of fluorine

1696 kg/m³

Density of krypton

3750 kg/m³

Density of helium

178.5 kg/m³

Density of chlorine

3214 kg/m³

Density of hydrogen

89.9 kg/m³

Materials

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Materials