Conservation of Energy in Fluid Flow: Interactive Learning Quizzes

Question 1

Which type of energy is NOT found in a fluid flow system?

Accepted Answer

Chemical energy

Answer

Kinetic energy

Answer

Potential energy

Answer

Thermal energy

Question 2

Which device converts hydraulic energy into mechanical energy?

Accepted Answer

Turbine

Answer

Pump

Answer

Compressor

Answer

Fan

Question 3

The Bernoulli equation is applicable to:

Accepted Answer

Incompressible and inviscid fluids

Answer

Viscous and inviscid fluids

Answer

Compressible and incompressible fluids

Answer

Compressible and viscous fluids

Question 4

The primary cause of energy loss in a hydraulic system is:

Accepted Answer

Friction

Answer

Heat transfer

Answer

Turbulence

Answer

Viscosity

Question 5

The efficiency of a pump is defined as the:

Accepted Answer

Ratio of power output to power input

Answer

Ratio of power input to power output

Answer

Ratio of flow rate to head

Answer

Ratio of head to flow rate

Question 6

The energy equation in fluid mechanics is based on which fundamental principle?

Accepted Answer

First law of thermodynamics

Answer

Second law of thermodynamics

Answer

Third law of thermodynamics

Answer

Zeroth law of thermodynamics

Question 7

The Bernoulli equation is a special case of the energy equation applicable to:

Accepted Answer

Inviscid, incompressible flows

Answer

Viscous, compressible flows

Answer

Laminar, turbulent flows

Answer

Steady, unsteady flows

Question 8

The head loss in a pipe can be expressed as a function of which parameters?

Accepted Answer

Pipe length and diameter, fluid Reynolds number, and pipe roughness

Answer

Flow rate, pipe length, and pipe diameter

Answer

Fluid velocity, pipe length, and pipe cross-sectional area

Answer

Pressure, temperature, and fluid density

Question 9

How is the efficiency of a pump defined?

Accepted Answer

Ratio of power output to power input

Answer

Ratio of power input to power output

Answer

Ratio of pressure head to velocity head

Answer

Ratio of velocity head to pressure head

Question 10

Define the specific energy of a fluid.

Accepted Answer

Energy per unit mass

Answer

Energy per unit volume

Answer

Energy per unit time

Answer

Energy per unit area

Question 11

Identify the device in a fluid flow system that converts kinetic energy into pressure energy.

Accepted Answer

Diffuser

Answer

Pump

Answer

Turbine

Answer

Nozzle

Question 12

Explain the significance of the Bernoulli equation in the field of fluid mechanics.

Accepted Answer

It establishes the relationship between pressure, velocity, and elevation in a flowing fluid.

Answer

It calculates the flow rate within a pipe.

Answer

It predicts the onset of cavitation.

Answer

It accounts for viscous losses in fluid flow.

Question 13

In a pipeline system, where is the energy equation applied to determine the pressure drop between two points?

Accepted Answer

Between two points with known pressure and velocity

Answer

Between two arbitrary points on the pipeline

Answer

Between two points where the pipe diameter changes

Answer

Across the entire length of the pipeline

Question 14

Which of the following is NOT a recognized type of energy loss in fluid flow systems?

Accepted Answer

Potential energy loss

Answer

Pipe friction loss

Answer

Kinetic energy loss

Answer

Minor losses (e.g., elbows, bends)

Question 15

In a turbine, the fluid undergoes an energy conversion from which form to which form?

Accepted Answer

Potential/Pressure to Kinetic

Answer

Kinetic to Potential/Pressure

Answer

Kinetic to Electrical

Answer

Electrical to Kinetic

Question 16

Which of the following factors does NOT affect the head loss in a pipe system?

Accepted Answer

Fluid temperature

Answer

Pipe diameter

Answer

Pipe roughness

Question 17

In a flow system with multiple branches, the principle that states the total flow rate is equal to the sum of the flow rates in each branch is known as the:

Accepted Answer

Continuity equation

Answer

Bernoulli equation

Answer

Energy equation

Answer

Momentum equation

Question 18

Which of the following is NOT a source of energy loss in a fluid flow system?

Accepted Answer

Elasticity of the fluid

Answer

Viscous dissipation

Answer

Turbulence

Answer

Flow separation

Question 19

A pipe carrying water experiences a sudden contraction in diameter. Which of the following statements is TRUE regarding the energy head before and after the contraction?

Accepted Answer

The pressure head decreases, and the velocity head increases.

Answer

The pressure head increases, and the velocity head decreases.

Answer

Both pressure head and velocity head remain constant.

Question 20

A fluid flows through a horizontal pipe with a constant cross-sectional area. Which of the following factors will NOT affect the total energy head of the fluid?

Accepted Answer

Pipe length

Answer

Fluid viscosity

Answer

Fluid velocity

Question 21

A hydraulic turbine is used to generate electricity. The turbine receives water at a height of 100 m above the turbine. If the turbine efficiency is 90%, what is the theoretical maximum power output of the turbine? (Assume water density = 1000 kg/m³ and gravitational acceleration = 9.81 m/s²)

Accepted Answer

882.9 kW

Answer

981 kW

Answer

1089 kW

Answer

794.6 kW

Question 22

A fluid flowing through a pipe undergoes a gradual reduction in diameter. What happens to the total energy head of the fluid?

Accepted Answer

The total energy head remains approximately constant.

Answer

The total energy head decreases.

Answer

The total energy head increases.

Question 23

A fluid flowing through a pipe experiences a head loss due to friction. Which of the following best describes the impact of this head loss on the total energy head of the fluid?

Accepted Answer

The total energy head decreases due to the conversion of mechanical energy into heat.

Answer

The total energy head remains constant despite the head loss.

Answer

The total energy head increases due to the generation of heat.