Fluid Dynamics Learning Quizzes | Engineering Mechanics | Mechanical Engineering

Question 1

Which of the following is the correct form of Bernoulli's equation?

Accepted Answer

P + (1/2)ρv^2 + ρgh = constant

Answer

P + (1/2)v^2ρ + ρgh = constant

Answer

1/2ρv^2 + ρgh + P = constant

Answer

ρgh + 1/2v^2ρ + P = constant

Question 2

Which type of pump is the most suitable option for applications requiring high pressure and low flow rates?

Accepted Answer

Reciprocating pump

Answer

Centrifugal pump

Answer

Axial-flow pump

Answer

Mixed-flow pump

Question 3

The efficiency of a turbine is defined as:

Accepted Answer

Ratio of power output to power input

Answer

Ratio of power input to power output

Answer

Ratio of head input to head output

Answer

Ratio of head output to head input

Question 4

What is the shape of the velocity profile in a fully developed laminar pipe flow?

Accepted Answer

Parabolic

Answer

Linear

Answer

Exponential

Answer

Logarithmic

Question 5

Which dimensionless coefficient is used to characterize the efficiency of a pump?

Accepted Answer

Specific speed

Answer

Nusselt number

Answer

Froude number

Answer

Prandtl number

Question 6

The relationship between head and pressure in a fluid is given by:

Accepted Answer

Head is equal to pressure divided by density

Answer

Head is proportional to the square of pressure

Answer

Head is inversely proportional to pressure

Answer

Head is independent of pressure

Question 7

Which fundamental principle of fluid statics is accurately described by the following statement?

Accepted Answer

Buoyant force on a submerged object equals the weight of displaced fluid.

Answer

Pressure within a fluid is independent of depth.

Answer

Center of pressure on a submerged surface always matches the surface's centroid.

Answer

Fluid statics applies exclusively to incompressible fluids.

Question 8

Which of the following is NOT a fundamental property of fluids?

Accepted Answer

Enthalpy

Answer

Density

Answer

Viscosity

Answer

Surface tension

Question 9

Bernoulli's equation describes the relationship between:

Accepted Answer

Pressure, velocity, and height

Answer

Velocity, pressure, and temperature

Answer

Acceleration, displacement, and time

Answer

Force, mass, and acceleration

Question 10

In a pipe flow, the velocity profile is typically:

Accepted Answer

Parabolic

Answer

Hyperbolic

Answer

Linear

Answer

Exponential

Question 11

The efficiency of a turbine is defined as the:

Accepted Answer

Ratio of output power to input power

Answer

Ratio of input power to output power

Answer

Ratio of torque to speed

Answer

Ratio of speed to torque

Question 12

The force exerted by a fluid on a submerged object is known as:

Accepted Answer

Buoyancy force

Answer

Gravitational force

Answer

Viscous force

Answer

Pressure force

Question 13

Which of the following flow regimes is characterized by chaotic and unpredictable fluid motion?

Accepted Answer

Turbulent flow

Answer

Laminar flow

Answer

Viscous flow

Answer

Newtonian flow

Question 14

The continuity equation is primarily used to determine:

Accepted Answer

Mass flow rate

Answer

Velocity distribution

Answer

Pressure distribution

Answer

Temperature distribution

Question 15

Which of the following devices is used to measure the velocity of a flowing fluid?

Accepted Answer

Pitot tube

Answer

Thermometer

Answer

Manometer

Answer

Anemometer

Question 16

Which of the following is not a general property of fluids?

Accepted Answer

Fluids can be compressed

Answer

Fluids are matter

Answer

Fluids assume the shape of their container

Answer

Fluids exhibit viscosity

Question 17

Bernoulli's equation relates which quantities in fluid dynamics?

Accepted Answer

Pressure, velocity, and elevation

Answer

Force, mass, and acceleration

Answer

Temperature, volume, and density

Answer

Velocity, frequency, and wavelength

Question 18

In a pipe, the velocity profile is typically:

Accepted Answer

Parabolic

Answer

Uniform

Answer

Triangular

Answer

Constant

Question 19

The primary function of a pump in a fluid system is to:

Accepted Answer

Increase fluid pressure

Answer

Decrease fluid temperature

Answer

Change fluid velocity

Answer

Filter impurities from the fluid

Question 20

The efficiency of a turbine is defined as:

Accepted Answer

Power output divided by power input

Answer

Power input divided by power output

Answer

Difference between power output and power input

Answer

Ratio of power output to power loss

Question 21

Which dimensionless number represents the ratio of inertial forces to viscous forces in fluid flow?

Accepted Answer

Reynolds number

Answer

Froude number

Answer

Weber number

Answer

Mach number

Question 22

The boundary layer in fluid flow is the region where:

Accepted Answer

Fluid properties change rapidly

Answer

Fluid velocity is zero

Answer

Fluid velocity is maximum

Answer

Fluid pressure is constant

Question 23

The discharge coefficient of a flowmeter is a measure of:

Accepted Answer

Actual flow rate compared to theoretical flow rate

Answer

Pressure drop across the flowmeter

Answer

Accuracy of the flowmeter reading

Answer

Repeatability of the flowmeter measurements

Question 24

Which type of flow is characterized by a constant velocity profile?

Accepted Answer

Laminar flow

Answer

Turbulent flow

Answer

Tranquil flow

Answer

Supercritical flow

Question 25

The momentum equation for fluid flow is derived from the conservation of:

Accepted Answer

Momentum

Answer

Mass

Answer

Energy

Answer

Heat

Question 26

Which property is NOT fundamental to fluids?

Accepted Answer

Elasticity

Answer

Density

Answer

Viscosity

Answer

Compressibility

Question 27

Bernoulli's equation establishes a relationship between:

Accepted Answer

Pressure, velocity, and elevation

Answer

Force, mass, and acceleration

Answer

Work, energy, and power

Answer

Stress, strain, and modulus

Question 28

Laminar flow is distinguished by:

Accepted Answer

Smooth, orderly fluid motion

Answer

Turbulent, chaotic fluid behavior

Answer

Incompressible fluid with constant density

Answer

High Reynolds number indicating turbulent flow

Question 29

Which parameter is crucial for assessing turbine performance?

Accepted Answer

Specific speed

Answer

Poisson's ratio

Answer

Young's modulus

Answer

Shear strength

Question 30

The significance of the Reynolds number lies in its representation of the ratio of:

Accepted Answer

Inertial forces to viscous forces

Answer

Elastic forces to gravitational forces

Answer

Thermal conductivity to specific heat capacity

Answer

Electrical resistance to magnetic permeability

Question 31

Shear stress in a fluid is:

Accepted Answer

Proportional to the gradient of velocity

Answer

Inversely proportional to the fluid's velocity

Answer

Independent of the fluid's viscosity

Answer

A measure of the fluid's elasticity

Question 32

The continuity equation for an incompressible fluid implies that:

Accepted Answer

Mass flow rate remains constant along a streamline

Answer

Velocity is inversely proportional to pressure

Answer

Density is proportional to temperature

Answer

Shear stress is proportional to pressure gradient

Question 33

Which of the following is NOT a dimensionless similarity parameter?

Accepted Answer

Coefficient of friction

Answer

Reynolds number

Answer

Froude number

Answer

Mach number

Question 34

In a convergent-divergent nozzle, the flow:

Accepted Answer

Accelerates and expands in the convergent section, decelerates and compresses in the divergent section

Answer

Decelerates and expands in the convergent section, accelerates and compresses in the divergent section

Answer

Undergoes a sudden change in pressure at the throat

Answer

Remains incompressible throughout the nozzle

Question 35

The energy equation for an incompressible fluid flow is known as:

Accepted Answer

Bernoulli's equation

Answer

Navier-Stokes equation

Answer

Euler's equation

Answer

Hagen-Poiseuille equation

Question 36

A centrifugal pump primarily converts:

Accepted Answer

Electrical energy to kinetic energy

Answer

Potential energy to kinetic energy

Answer

Kinetic energy to potential energy

Answer

Mechanical energy to thermal energy

Question 37

In a fluid flow, the boundary layer is the region where:

Accepted Answer

Velocity gradient is maximum

Answer

Velocity is zero

Answer

Velocity is maximum

Answer

Pressure is minimum

Question 38

The term 'cavitation' in fluid dynamics refers to:

Accepted Answer

Formation of vapor bubbles in a liquid

Answer

Separation of fluid from a surface

Answer

Increase in pressure within a fluid

Answer

Decrease in viscosity of a fluid

Question 39

Bernoulli's equation relates:

Accepted Answer

Pressure, velocity, and elevation

Answer

Force, momentum, and time

Answer

Power, work, and efficiency

Answer

Temperature, entropy, and volume

Question 40

Which phenomenon describes fluid movement from high pressure to low pressure?

Accepted Answer

Flow

Answer

Hydrostatic pressure

Answer

Capillary action

Answer

Diffusion

Question 41

What type of pump increases fluid pressure?

Accepted Answer

Centrifugal pump

Answer

Axial flow pump

Answer

Mixed flow pump

Answer

Reciprocating pump

Question 42

Define the efficiency of a turbine.

Accepted Answer

Output power divided by input power

Answer

Input power divided by output power

Answer

Pressure difference multiplied by flow rate

Answer

Elevation change divided by flow velocity

Question 43

Which flow type exhibits smooth, orderly fluid movement?

Accepted Answer

Laminar flow

Answer

Turbulent flow

Answer

Stokes flow

Answer

Bernoulli flow

Question 44

What does the Reynolds number indicate?

Accepted Answer

Whether flow is laminar or turbulent

Answer

The fluid's pressure drop in a pipe

Answer

The power required to operate a pump

Answer

The efficiency of a turbine

Question 45

How does higher fluid density affect pressure?

Accepted Answer

Increases pressure

Answer

Decreases pressure

Answer

Increases velocity

Answer

Decreases velocity

Question 46

In fluid dynamics, how does the principle of mass conservation apply to fluid flow systems?

Accepted Answer

Mass flow rate into a control volume equals mass flow rate out, ensuring mass conservation.

Answer

Mass can be created or destroyed, violating mass conservation.

Answer

Mass is conserved only in specific regions, not at system boundaries.

Answer

Fluid mass can change due to density changes.

Question 47

Which of the following dimensionless parameters characterizes the ratio of inertial forces to viscous forces in fluid flow?

Accepted Answer

Reynolds number

Answer

Mach number

Answer

Froude number

Question 48

Bernoulli's equation relates which three quantities?

Accepted Answer

Pressure, velocity, and elevation

Answer

Velocity, acceleration, and displacement

Answer

Stress, strain, and deformation

Answer

Temperature, density, and viscosity

Question 49

Which type of flow is characterized by smooth, parallel layers?

Accepted Answer

Laminar flow

Answer

Turbulent flow

Answer

Supercritical flow

Question 50

A pump is primarily used to:

Accepted Answer

Increase the pressure of a fluid

Answer

Convert electrical energy into mechanical energy

Answer

Decrease the velocity of a fluid

Answer

Change the direction of a fluid

Question 51

Which of the following factors does NOT affect pipe friction?

Accepted Answer

Fluid density

Answer

Flow velocity

Answer

Pipe diameter

Answer

Fluid viscosity

Question 52

Which equation is used to calculate the pressure drop in a pipe due to friction?

Accepted Answer

Darcy-Weisbach equation

Answer

Euler's equation

Answer

Hagen-Poiseuille equation

Answer

Navier-Stokes equations

Question 53

A fluid with a high viscosity will generally:

Accepted Answer

Flow more slowly than a fluid with a low viscosity

Answer

Flow faster than a fluid with a low viscosity

Answer

Have a lower surface tension than a fluid with a low viscosity

Answer

Have a higher density than a fluid with a low viscosity

Question 54

Which of the following is a key assumption of Bernoulli's equation?

Accepted Answer

Incompressible, frictionless flow

Answer

Compressible, viscous flow

Answer

Laminar, turbulent flow

Answer

Steady, unsteady flow

Question 55

The lift force on an airfoil is primarily generated by:

Accepted Answer

Pressure difference between the upper and lower surfaces

Answer

Surface tension of the fluid

Answer

Viscosity of the fluid