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.
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28 questions · page 2 of 2
- A. Be low.
- B. Be high.
- C. Be zero.
- D. Vary unpredictably.
Explanation: The correct answer is that the pressure above the wings will be low. This is due to Bernoulli's principle, which states that as the speed…
Correct answer: Be low.- A. Increase
- B. Decrease
- C. Become zero
- D. Remain the same
Explanation: According to Bernoulli's principle, when a fluid flows through a pipe and experiences a decrease in pressure, the speed of the fluid…
Correct answer: Increase- A. Pressure is reduced
- B. Pressure is increased
- C. Viscosity is increased
- D. Viscosity is decreased
Explanation: The correct answer is that pressure is reduced. In a Venturi meter, when a liquid flows through the narrow section, its velocity…
Correct answer: Pressure is reduced- A. v2 = √ 2g (h1 - h2)
- B. v2 = √ g (h2 - h1)
- C. v2 = √ 2g (h2 - h1)
- D. v2 = √ g (h1 - h2)
Explanation: Explanation:Torricelli's theorem states that the velocity (v) of a liquid flowing out of an orifice at the bottom of a container is equal…
Correct answer: v2 = √ 2g (h1 - h2)- A. K.E. per unit volume
- B. K.E.
- C. K.E. per unit area
- D. K.E. per unit length
Explanation: Bernoulli's equation formula is a relation between the pressure, kinetic energy, and gravitational potential energy of a fluid in a…
Correct answer: K.E. per unit volume- A. Torrielll's effect
- B. Bernoulli's effect
- C. Venturis effect
- D. Doppler effect
Explanation: Bernoulli's principle states that as the speed of a fluid increases, the pressure exerted by the fluid decreases.
Correct answer: Bernoulli's effect27. Water flows through a constriction in horizontal pipe as it enters the constriction, the water's:
- A. Speed increases and pressure remains constant
- B. Speed increases and pressure increase
- C. Speed increases and pressure decreases
- D. Speed decreases and pressure Increases
Explanation: We know that the volume flow rate (Avt) is constant, with V/v = A, we know that Area is directionally proportional to velocity.
Correct answer: Speed increases and pressure decreases- A. 2.5m/s
- B. 24m/s
- C. 4.44m/s
- D. Cannot be calculated unless the area of the hole is given
Explanation: The problem can be solved using Torricelli's Theorem, which states that the speed of efflux, v, of a fluid under the force of gravity…
Correct answer: 24m/s