MDCAT Physics — Fluid Dynamics
Fluid Dynamics is a core Physics topic in the PMDC MDCAT syllabus, covering 6 subtopics. Below are the subtopics to revise, how often the topic appears in past papers, and real past-paper MCQs to try.
Subtopics (6)
- Bernoulli's Equation
- Equation of Continuity
- Fluid Drag
- Fluid Flow (Streamline, Turbulent)
- Fluid Mechanics
- Terminal Velocity
How Fluid Dynamics is tested
Across the 16 MDCAT past papers on ParhaiKrlo, Fluid Dynamics accounts for 38 questions. It appears in 14 of them, about 2.7 questions a paper. The heaviest was MDCAT 2014, with 6 questions, and the most recent is MDCAT 2025, with 5.
| Paper | Questions |
|---|---|
| MDCAT 2025 | 5 |
| MDCAT 2023 | 1 |
| MDCAT 2022 | 1 |
| MDCAT 2018 | 1 |
| MDCAT 2017 | 2 |
| MDCAT 2016 | 3 |
| MDCAT 2015 | 3 |
| MDCAT 2014 | 6 |
| MDCAT 2013 | 3 |
| MDCAT 2012 | 3 |
| MDCAT 2011 | 3 |
| MDCAT 2010 | 2 |
| MDCAT 2009 | 3 |
| MDCAT 2008 | 2 |
Fluid Dynamics MCQs from the MDCAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · MDCAT 2025 · Fluid Dynamics
An incompressible fluid flows through a pipe that narrows in one section. The fluid speed increases in that region to maintain:
- A.Constant pressure
- B.Constant energy
- C.Constant mass flow rate
- D.Constant volume
Show answer
Answer: C. Constant mass flow rate — Increased fluid speed in a narrowed pipe section maintains constant mass flow rate (continuity equation).
- Q2 · MDCAT 2023 · Fluid Dynamics
An observer standing near the sea shore observes 54 waves per minute. If the wavelength of the water wave is 10m then the velocity of water wave is:
- A.540 m/s
- B.9 m/s
- C.5.4 m/s
- D.None
Show answer
Answer: B. 9 m/s — With 54 waves per minute (0.9 Hz) and a 10 m wavelength, the water wave's velocity is 9 m/s.
- Q3 · MDCAT 2022 · Fluid Dynamics
When a heavy coin falls a short distance towards the ground it does not reach terminal velocity. Why is this so?
- A.The coin has not hit the ground
- B.The weight of coin is equal to air resistance
- C.The weight of coin increases as air resistance increases
- D.The weight of coin is more than air resistance
Show answer
Answer: D. The weight of coin is more than air resistance — A coin falling only a short distance hasn't yet built up enough speed for air resistance to equal its weight, so it hasn't reached terminal velocity.