What does Bernoulli’s theorem state about fluid flow?
a) Pressure decreases as velocity increases
b) Pressure increases as velocity increases
c) Density remains constant
d) Viscosity increases with speed
Which equation represents Bernoulli’s theorem?
a) P + ½ρv² + ρgh = constant
b) P + ρv² = constant
c) P – ½ρv² – ρgh = 0
d) P + ½v² – gh = constant
Bernoulli’s theorem is based on the principle of:
a) Conservation of mass
b) Conservation of momentum
c) Conservation of energy
d) Conservation of density
In Bernoulli’s theorem, which type of energy is NOT considered?
a) Kinetic energy
b) Potential energy
c) Internal energy
d) Pressure energy
Bernoulli’s equation is applicable to:
a) Viscous flow
b) Compressible flow
c) Steady, incompressible flow
d) Rotational flow
Which condition is necessary for Bernoulli’s equation to be valid?
a) The flow should be turbulent
b) The fluid should be compressible
c) The flow should be steady and non-viscous
d) The density should change with height
The pressure in a fluid decreases when:
a) The velocity increases
b) The height decreases
c) The kinetic energy decreases
d) The fluid becomes denser
Which device is based on Bernoulli’s principle?
a) Hydrometer
b) Venturi meter
c) Thermometer
d) Barometer
What happens to velocity when fluid moves through a narrow passage, according to Bernoulli’s theorem?
a) Increases
b) Decreases
c) Remains constant
d) Becomes zero
According to Bernoulli’s theorem, when the height of a fluid increases, the pressure:
a) Increases
b) Decreases
c) Remains constant
d) First increases, then decreases
Which scientific principle explains how airplanes generate lift?
a) Archimedes’ principle
b) Newton’s law of cooling
c) Bernoulli’s principle
d) Boyle’s law
Which term in Bernoulli’s equation represents pressure energy?
a) P
b) ½ρv²
c) ρgh
d) mg
A fluid moving through a horizontal pipe speeds up in a constricted section. What happens to the pressure in that section?
a) Increases
b) Decreases
c) Remains constant
d) Becomes zero
Which quantity remains constant along a streamline in Bernoulli’s equation?
a) Velocity
b) Pressure
c) Total mechanical energy
d) Viscosity
What type of force is responsible for changes in pressure in a flowing fluid?
a) Centrifugal force
b) Viscous force
c) Inertial force
d) Gravitational force
Which real-world application uses Bernoulli’s principle?
a) Brake system in a car
b) Blood flow in arteries
c) Heat conduction in metals
d) Magnetic levitation
What does the term “streamline flow” mean in Bernoulli’s theorem?
a) Random motion of particles
b) Smooth and orderly flow
c) Flow with eddies and turbulence
d) High-speed motion only
Which instrument measures fluid velocity using Bernoulli’s theorem?
a) Pitot tube
b) Hydrometer
c) Barometer
d) Anemometer
The continuity equation is often used with Bernoulli’s theorem. What does it state?
a) Mass flow rate remains constant
b) Pressure is directly proportional to velocity
c) Energy is lost in turbulent flow
d) Volume flow rate changes with height
In an ideal fluid, Bernoulli’s equation ignores:
a) Kinetic energy
b) Pressure energy
c) Viscous effects
d) Gravitational effects
Which of the following assumptions is NOT made in Bernoulli’s theorem?
a) Fluid is incompressible
b) Fluid has no viscosity
c) Flow is steady
d) Fluid has constant temperature
What is the primary cause of pressure drop in Bernoulli’s equation?
a) Increased height
b) Increased velocity
c) Increased viscosity
d) Increased mass
How does Bernoulli’s principle help in atomizers?
a) Creates pressure drop to draw liquid up
b) Increases the density of air
c) Reduces turbulence in airflow
d) Prevents fluid mixing
Bernoulli’s equation can be derived from:
a) Newton’s second law
b) The first law of thermodynamics
c) The principle of conservation of energy
d) Pascal’s law
What happens when a fluid passes through a nozzle?
a) Speed increases and pressure decreases
b) Speed decreases and pressure increases
c) Both pressure and speed increase
d) Both pressure and speed decrease
Why is Bernoulli’s theorem not applicable to high-viscosity fluids?
a) Energy is lost due to friction
b) Mass is not conserved
c) Velocity remains constant
d) Density fluctuates
What type of flow is needed for Bernoulli’s equation to hold true?
a) Compressible flow
b) Turbulent flow
c) Steady, incompressible flow
d) Rotational flow
In Bernoulli’s equation, what happens if kinetic energy increases?
a) Pressure decreases
b) Height increases
c) Flow stops
d) Pressure increases
Which mathematical law forms the foundation of Bernoulli’s theorem?
a) Newton’s laws
b) Pascal’s law
c) The conservation of mechanical energy
d) The second law of thermodynamics
