Fluid Mechanics

Question 1

Liquids and gases together called

Answer 1

fluids

Question 2

use liquids and / or called gases as working substance for transfer and
transformation of energy from one form to another

Answer 2

fluid machines

Question 3

convert the potential energy or kinetic energy or pressure energy or thermal energy or internal energy of fluid into mechanical work and are called engines or turbines or prime movers or driving machine.

Answer 3

fluid machines

Question 4

may called pumps or compressors or blowers or fans to deliver fluids from low level of energy to higher level by consuming mechanical work

Answer 4

driven machines

Question 5

Is an equipment capable of handling fluid, either moving the fluid or moved by the fluid.

Answer 5

FLUID MACHINERY

Question 6

Is a device which converts the energy stored by a fluid into mechanical energy or vice versa.

Answer 6

FLUID MACHINERY

Question 7

Energy in the form of the potential, kinetic and intermolecular energy

Answer 7

FLUID MACHINERY

Question 8

The energy usually transmitted by rotating shaft.

Answer 8

FLUID MACHINERY

Question 9

The device in which the kinetic, potential or intermolecular energy held by fluid is converted in the form of mechanical energy in a rotating member is known as a

Answer 9

TURBINE

Question 10

Is the force of gravity in a unit
volume of a substance

Answer 10

SPECIFIC WEIGHT

Question 11

Is the mass per volume of a
substance.

Answer 11

DENSITY

Question 12

Is the volume of a unit mass of a
substance or the reciprocal of
density.

Answer 12

SPECIFIC VOLUME

Question 13

Is the ratio of the specific weight
of any substance to that of water
or the ratio of density of any
substance to that water

Answer 13

SPECIFIC GRAVITY

Question 14

Is a measure of the resistance to
flow of a fluid; or it may be
defined as the ratio of the
shearing stress or force between
adjacent layers of fluid to the
rate of change of velocity
perpendicular to the direction of
motion.

Answer 14

VISCOSITY

Question 15

Is a dimensionless parameter used to determine the type of fluid while flowing
through a pipe.

Answer 15

REYNOLDS NUMBER

Question 16

At low Reynolds numbers, flows tend to be dominated by _______, while at
high Reynolds numbers flows tend to be _______

Answer 16

laminar flow ; turbulent

Question 17

Re < 2000 – Low Velocity

Answer 17

Laminar Flow

Question 18

Re > 4000 – High Velocity

Answer 18

Turbulent Flow

Question 19

Re = 2000 – 4000

Answer 19

Critical Flow

Question 20

Is the type of flow of fluid in which the fluid particles move along straight, parallel paths in layers or laminae.

Answer 20

LAMINAR FLOW

Question 21

Is the type of flow of fluid in which the fluid particles move in a haphazard fashion in all directions.

Answer 21

Turbulent Flow

Question 22

It is impossible to trace the motion of an individual particle ( high velocity, variable direction).

Answer 22

Turbulent Flow

Question 23

Is a combination of laminar flow and turbulent flow

Answer 23

Critical Flow (Transitional Flow)

Question 24

is an equation derived from the first law of thermodynamics of steady flow open system used to determine the mass flow rate and volume flow rate of fluid.

Answer 24

Continuity equation

Question 25

It is a system used to move liquid at low pressure elevation to high pressure elevation

Answer 25

Pump

Question 26

A machine that draws a fluid into itself through a suction port and forces that fluids out through a discharge port

Answer 26

Pump

Question 27

A machine for moving a liquid, such as water, by accelerating it radially outward in an impeller to a surrounding volute casing

Answer 27

Centrifugal Pump

Question 28

Also known as piston pump

Answer 28

Reciprocating Pump

Question 29

A pump in which motion and pressure are applied to the fluid by a reciprocating piston in a cylinder

Answer 29

Reciprocating Pump

Question 30

A displacement pump that delivers a steady flow by the action of two members in rotational contact

Answer 30

Rotary Pump

Question 31

Also known as Vertical Turbine Pump

Answer 31

Deep-Well Pump

Question 32

A multistage centrifugal pump for lifting water from deep, small diameter wells; a surface electric motor operates the shaft

Answer 32

Deep-Well Pump

Question 33

is the height to which a column of fluid must rise to contain the same amount of energy as is contained in one unit weight or mass of fluid under the conditions being considered.

Answer 33

Head of Fluid

Question 34

Is a head based upon the elevation of the fluid above some arbitrarily chosen datum plane.

Answer 34

Potential or Actual Head

Question 35

Is a measure of the kinetic energy contained in a unit mass fluid due to its velocity and is given by the familiar expression for kinetic energy.

Answer 35

Kinetic or Velocity Head

Question 36

Is the energy contained in the fluid as a result of its pressure

Answer 36

Pressure Head

Question 37

is an equation used to determine the head of fluid.

Answer 37

Bernoulli's equation

Question 38

In an _______, energy losses are considered and applying the first law of thermodynamics for steady flow.

Answer 38

actual flow system