Bernoulli’s Equation

Bernoulli’s Equation MDCAT MCQs with answers

5 past paper MCQs on Bernoulli’s Equation, from the Fluid Dynamics unit of MDCAT Physics. The year each question appeared is shown where known; tap “Show answer” for the correct option and a short solution.

Read the notes first Practise the unit as a quiz

1.In a pipe of varying cross-section as fluid enters the narrower region, it exhibits: (UHS MDCAT 2025)

  1. high velocity, high pressure
  2. high velocity, low pressure
  3. low velocity, high pressure
  4. low velocity, low pressure
Show answer

Correct answer: (b) high velocity, low pressure

Bernoulli’s equation trades pressure for speed, so the fast narrow section is the low pressure one.

2.Water flows steadily through a pipe that gradually narrows. At the wider end, the velocity of water is 1m/s, at the narrower end, the velocity is 3m/s. Which statement is CORRECT about the pressure in the narrower end compared to the wider end? (KMU MDCAT 2025)

  1. Pressure is lower at the narrow end because velocity is higher
  2. Pressure is higher at the narrow end because velocity is higher
  3. Pressure is the same at both ends since flow is continuous
  4. Pressure is independent of velocity of water
Show answer

Correct answer: (a) Pressure is lower at the narrow end because velocity is higher

Bernoulli’s equation trades pressure for speed, so the faster narrow end is at the lower pressure.

3.The increase in kinetic energy associated with decreased pressure of a fluid in a horizontal pipe is a consequence of the: (SIBA MDCAT 2025)

  1. Bernoulli's Principle
  2. Equation of continuity
  3. Pascal's principle
  4. Torricelli's theorem
Show answer

Correct answer: (a) Bernoulli's Principle

Bernoulli’s principle is the statement that pressure falls where the speed of a fluid rises.

4.In Bernoulli’s equation the term 1/2 ρv2 is called: (UHS MDCAT 2016)

  1. K.E. per unit volume
  2. K.E.
  3. K.E. per unit area
  4. K.E. per unit length
Show answer

Correct answer: (a) K.E. per unit volume

Each term of Bernoulli’s equation is an energy per unit volume, and this one is the kinetic part.

5.Potential energy per unit volume is given by: (UHS MDCAT 2016)

  1. mgh
  2. mgh/ρ
  3. gh
  4. ρgh
Show answer

Correct answer: (d) ρgh

$mgh$ divided by the volume gives $\rho gh$.

More in Fluid Dynamics