Free Bernoulli's Equation MCQs with Answers
28 Bernoulli's Equation MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Bernoulli’s equation applies conservation of energy to steady flow of an incompressible, non-viscous fluid along a streamline: pressure, kinetic and gravitational terms have a constant total. It explains pressure-speed changes in narrow pipes, Venturi meters and lift, and differs from continuity because it relates pressure as well as velocity and height.
Last updated
28 questions · page 1 of 2
- A. conservation of mass
- B. conservation of momentum
- C. conservation of energy for a flowing fluid
- D. Newton's third law
Explanation: The equation adds pressure energy, kinetic energy and potential energy per unit volume and states that the total is the same all along a…
Correct answer: conservation of energy for a flowing fluid- A. high
- B. low
- C. unchanged
- D. zero
Explanation: Since the total energy per unit volume is fixed, any gain in kinetic energy must be paid for by a fall in pressure energy.
Correct answer: low- A. air moves faster over the curved upper surface, lowering the pressure there
- B. air moves faster under the wing
- C. the wing is lighter than air
- D. the engines push the wing upwards
Explanation: The aerofoil shape makes the air travel further and faster across the top, so by Bernoulli's principle the pressure above is lower than…
Correct answer: air moves faster over the curved upper surface, lowering the pressure there- A. the temperature rise in a constriction
- B. the pressure difference between a wide section and a narrow section
- C. the weight of the fluid
- D. the colour change of the fluid
Explanation: The fluid speeds up in the throat, so its pressure falls, and measuring that pressure drop with a manometer gives the speed through the…
Correct answer: the pressure difference between a wide section and a narrow section- A. where the artery is narrowest
- B. where the blood flows fastest
- C. where the vessel is widest and the blood moves slowest
- D. at the capillaries
Explanation: Bernoulli's principle applies inside the body as well: where the cross section is large the speed is low and more of the energy remains as…
Correct answer: where the vessel is widest and the blood moves slowest- A. rises steadily along the pipe
- B. stays the same along the pipe for an ideal fluid
- C. falls to zero at the outlet
- D. depends on the colour of the pipe
Explanation: With constant area the speed is constant by continuity, and with no height change the potential term is constant too, so the pressure term…
Correct answer: stays the same along the pipe for an ideal fluid- A. gravity acts sideways on a spinning body
- B. the spin makes the ball lighter
- C. air moves faster on one side of the ball, creating a pressure difference across it
- D. the ball changes shape in the air
Explanation: The spinning surface drags air round with it, so the airflow is faster on one side and slower on the other, and by Bernoulli's principle…
Correct answer: air moves faster on one side of the ball, creating a pressure difference across it- A. High velocity, high pressure
- B. High velocity, low pressure
- C. Low velocity, high pressure
- D. Low velocity, low pressure
Explanation: Continuity forces the speed up in the constriction, and since the total energy per unit volume is fixed, the gain in kinetic energy must…
Correct answer: High velocity, low pressure9. The curved shape of an airplane wing causes air to move faster over the top surface. This leads to:
- A. Greater pressure on the top
- B. Lower pressure on the top
- C. Equal pressure on both sides
- D. Zero pressure above the wing
Explanation: Faster flow means lower pressure by Bernoulli's principle, so the pressure above the wing falls below that underneath and the difference…
Correct answer: Lower pressure on the top- A. Wing shape
- B. Aerofoil profile
- C. Curved profile
- D. None of these
Explanation: An aerofoil has a specially shaped cross-section that makes air move differently over its upper and lower surfaces, producing a pressure…
Correct answer: Aerofoil profile- A. Venturi meter
- B. Bernoulli equation
- C. Both A and B
- D. None
Explanation: A carburettor uses a narrow Venturi passage to increase air speed; Bernoulli's equation then explains the accompanying pressure decrease…
Correct answer: Both A and B- A. Bernoulli effect
- B. Torricelli effect
- C. Venturi effect
- D. Stokes effect
Explanation: The Venturi effect is the decrease in fluid pressure that occurs when fluid speed increases in a narrower section of a horizontal passage…
Correct answer: Venturi effect- A. Stationary
- B. Moving
- C. Moving slowly
- D. Moving fast
Explanation: Fast-moving air over the chimney opening has lower pressure according to Bernoulli's principle, creating a larger pressure difference that…
Correct answer: Moving fast- A. Mass
- B. Energy
- C. Momentum
- D. Fluid
Explanation: Bernoulli's equation follows from conservation of mechanical energy for steady, incompressible, non-viscous flow: pressure energy, kinetic…
Correct answer: Energy- A. Bernoulli's theorem
- B. Torricelli's theorem
- C. Venture relation
- D. All
Explanation: Torricelli's theorem gives the efflux speed from an opening as v = √(2gh), derived by applying Bernoulli's equation to the fluid surface…
Correct answer: Torricelli's theorem- A. Low
- B. High
- C. Constant
- D. Changes continuously
Explanation: For steady flow along a streamline, Bernoulli's equation shows that higher fluid speed corresponds to lower static pressure when the other…
Correct answer: Low- A. Low.
- B. Zero.
- C. High.
- D. Constant.
Explanation: According to Bernoulli's equation, in a streamline flow, the sum of the pressure energy, kinetic energy, and potential energy per unit…
Correct answer: Low.- A. Low
- B. Zero
- C. High
- D. Constant
Explanation: According to Bernoulli's equation, when the speed of a fluid increases, the pressure within the fluid decreases.
Correct answer: Low- A. Aerofoil.
- B. Atomizer.
- C. Venturi meter.
- D. Vacuum cleaner.
Explanation: The correct answer is vacuum cleaner. Bernoulli's principle explains how an increase in the speed of a fluid occurs simultaneously with a…
Correct answer: Vacuum cleaner.- A. Speed of the fluid is low at low pressure.
- B. Speed of the fluid is high at low pressure.
- C. Pressure of a fluid is independent of its speed.
- D. Theorem is valid only for turbulent flow of a liquid.
Explanation: According to Bernoulli's theorem, in a steady, ideal flow of an incompressible fluid with no viscosity, the sum of the pressure energy…
Correct answer: Speed of the fluid is high at low pressure.Bernoulli's Equation MCQs: common questions
Are these Bernoulli's Equation MCQs free?
Yes. All Bernoulli's Equation MCQs from Physics are free on TestUstad, with unlimited attempts and no account needed. Nothing on this page is a sample or a trial.
How many Bernoulli's Equation MCQs are on this page?
There are 28 Bernoulli's Equation MCQs in the Physics bank, shown 20 to a page with the correct answer and an explanation on each.
Does every Bernoulli's Equation MCQ have an explanation?
Yes. Each Bernoulli's Equation question shows the correct option and a written explanation of why it is correct, so a wrong answer teaches you something rather than just being marked wrong.
Can I take a timed Bernoulli's Equation test?
Yes. The practice button on this page starts a free Bernoulli's Equation test drawn from the Physics bank. It marks each answer instantly, gives you a score at the end, and can be retaken as many times as you like.