Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Engineering Fundamentals > Fluid Mechanics > Flashcards

Fluid Mechanics Flashcards

1
Q

Mass per unit volume of a liquid at a standard temperature and pressure

A

Density

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Mathematically, density is expressed as:

A

Density = mass / volume

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Volume per unit mass of the liquid

A

Specific volume

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Ratio of specific weight of a liquid to the specific weight of pure water at a standard temperature

A

Specific gravity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid

A

Viscosity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Ratio of dynamic viscosity to the density of the fluid

A

Kinematic viscosity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Property of a liquid that undergoes a change in volume with change in pressure

A

Compressibility

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Property of a liquid that enables it to resist tensile stress

A

Surface tension

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Phenomenon of rise and fall of a liquid surface in a small vertical tube held in a liquid relative to general level of the liquid

A

Capillarity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

When a liquid is contained in a vessel, it exerts force at all points on the (BLANK) and (BLANK) of the vessel

A

Sides and bottom

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Pressure is expressed in…

A

Pascal (N/m2)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The pressure measured with the help of a pressure gauge is known as (BLANK)

A

Gauge pressure = actual pressure - atmospheric pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The pressure of a liquid may be measured by a (BLANK)

A

Manometer

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Force exerted by a static fluid on a surface (either plane or curved) when the fluid comes in contact with the surface. This force is always normal to the surface.

A

Total pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The point of application of the resultant pressure on the surface

A

Center of pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The tendency of a liquid to uplift an immersed body, because of the upward thrust of the liquid

A

Buoyancy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

If the force of buoyancy is more than the weight of the liquid displaced, then the body will (BLANK)

A

Float

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

If the force of buoyancy is less than the weight of the liquid displaced, then the body will (BLANK)

A

Sink

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

If a body floating in a liquid does not return back to its original position and heels farther away when given a small angular displacement, then the body is said to be in…

A

Unstable equilibrium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

If a body floating in a liquid returns back to its original position, then the body is said to be in…

A

Stable equilibrium

21
Q

The quantity of liquid flowing per second through a section of a pipe or a channel

A

Rate of discharge

22
Q

If an incompressible liquid is continuously flowing through a pipe or a channel, the quantity of liquid passing per second is…

A

The same at all sections

23
Q

What is the relationship between cross sectional area and velocity at different points along a pipe?

A

A1V1=A2V2

24
Q

A flow in which the liquid particles at all sections of a pipe or channel have the same velocities

A

Uniform flow

25
Q

A flow in which the quantity of liquid flowing per second is constant

A

Steady flow

26
Q

Equation that demonstrates, for an incompressible fluid, the total energy of a particle remains the same, while the particle moves from one point to another.

A

Bernoulli’s Equation

27
Q

Small opening in the wall or base of a vessel through which fluid flows

A

Orifice

28
Q

The net force acting on a mass of fluid is equal to the change in (BLANK) of flow per unit time in that direction

A

Momentum

29
Q

Small open tube bent at a right angle that measures the velocity of flow at a point in a pipe

A

Pitot static tube

30
Q

Opening provided in the side of a tank or vessel that measures the rate of flow of a liquid

A

Notch

31
Q

When a pipe is partially full of liquid, it then behaves like an (BLANK)

A

Open channel

32
Q

If a compound pipe is to be replaced by a pipe of uniform diameter, then the loss of head and discharge of both the pipes should be (BLANK)

A

The same

33
Q

The rate of discharge of a main pipe that is split is (BLANK) the sum of discharges in each of the parallel pipes

A

Equal to

34
Q

Power transmitted through a pipe will be maximum when the head lost in friction is equal to (BLANK) of the total supply head

A

One third

35
Q

When liquid flowing through a long pipe is suddenly brought to rest by closing the valve at the end of a pipe, a pressure wave of high intensity is produced behind the valve. This phenomenon is known as…

A

Water hammer

36
Q

The shear stress on a layer of a fluid is (BLANK) to the rate of shear strain.

A

Directly proportional

37
Q

Fluid with zero viscosity

A

Ideal fluid

38
Q

Real fluids possess…

A

Viscosity

39
Q

A fluid whose viscosity does not change with the rate of deformation or shear strain

A

Newtonian Fluid

40
Q

A fluid in which the viscosity of fluid is dominating over the inertia forces

A

Laminar flow

41
Q

A flow in which the inertia force is dominating over the inertia

A

Turbulent flow

42
Q

The velocity at which the flow changes from laminar flow to turbulent flow

A

Critical velocity

43
Q

Ratio of the inertia force to the viscous force

A

Reynold’s Number

44
Q

Flow in a pipe is laminar is R (BLANK) and turbulent if R (BLANK)

A

< 2000, > 2800

45
Q

The loss of head due to friction in a pipe of uniform diameter in which a viscous flow is taking place is equal to

A

16/Rn

46
Q

In an incompressible fluid flow, not only is flow the same across all points, but so is the (BLANK) of the fluid

A

Mass

47
Q

Ratio of velocity of fluid to the velocity of the sound wave

A

Mach Number

48
Q

A point in the flow where the velocity of fluid is zero

A

Stagnation point

Engineering Fundamentals (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions