MDCAT Fluid Dynamics MCQs
Customize your practice drill: select target topics, configure your question limit (up to 180 MCQs per test), and choose your mode.
Total Topics
10
Selected Topics
1
Available MCQs
91
Question Limit
Up to 180
Select Topics to Practice
Questions will be drawn only from checked topics.
Test Configuration
Configure question count (limit 180) and testing mode.
Selected topics have 91 total questions. Test will draw 50 shuffled MCQs.
Sample Fluid Dynamics MCQs with answers
Try these questions, then open the answer to check your reasoning. Use the quiz above for more topics and a complete review.
Drag & terminal
1. A raindrop falling at terminal velocity has:
- A. net force zero
- B. zero velocity
- C. zero drag
- D. acceleration g
View answer and explanation
Answer: A. net force zero
Terminal means the velocity has stopped changing, so and = 0. Weight is balanced by drag (and a little upthrust). Drag is not zero — it is what cancelled the weight. g would be free fall in vacuum.
Fluid Flow
2. A very viscous liquid can remain laminar at a speed that makes water turbulent because
- A. it cannot move in a pipe
- B. its Reynolds number is lower
- C. its density must be zero
- D. its pressure is always higher
View answer and explanation
Answer: B. its Reynolds number is lower
Greater viscosity lowers Reynolds number and suppresses turbulence.
Terminal Velocity
3. At terminal velocity, a falling sphere in viscous fluid has:
- A.
- B.
- C. Only buoyant force acts
- D. Zero gravity effect
View answer and explanation
Answer: B.
Keyword/Clue: terminal velocity Concept/Formula: At terminal velocity, the sphere moves with constant velocity so and hence ∑ Therefore the downward weight is balanced by the upward drag and buoyant force: Fdrag+Fbuoyancy=Fweight. Why the Other Options Are Wrong: - Option A: At terminal velocity , so Fnet= , not nonzero. - Option C: Drag and weight also act; it is not only buoyant force. - Option D: Gravity still acts; terminal velocity occurs due to balance with drag and buoyancy, not zero gravity effect.
About this unit
MDCAT Fluid Dynamics — Unit 41
788 practice MCQs covering Terminal Velocity, Fluid Drag, Fluid Flow, Continuity Equation, Bernoulli's Principle, Drag & terminal, Applications, Flow, Continuity, Bernoulli. Select custom topics and sit tailored tests up to 180 questions per drill.
Common questions about Fluid Dynamics practice
How many Fluid Dynamics MCQs are available on DIFF. MDCAT?
The current Fluid Dynamics question bank contains 788 practice MCQs across 10 topics. This is the bank size, not the length of one test. Choose your topics and a question count from 1 to 180, limited by the questions available in those topics.
Which topics does the Fluid Dynamics quiz cover?
The selectable topics are Terminal Velocity, Fluid Drag, Fluid Flow, Continuity Equation, Bernoulli's Principle, Drag & terminal, Applications, Flow, Continuity, Bernoulli. Use Select all for a broad chapter drill, Clear to start a focused selection, or choose individual topics. Questions are drawn from your chosen topics, so you can target a weak concept before returning to a wider test.
How do I build a custom Fluid Dynamics test?
Open the chapter builder, select one or more topics, enter your question count, and choose Tutor Mode or Timed Exam. The available-question total updates with your selection. Start Test generates a shuffled drill; you do not have to follow a fixed Quiz 1 or Quiz 2 sequence.
What is the difference between Tutor Mode and Timed Exam?
Tutor Mode gives feedback and an explanation after you choose an option, and you can change or clear that choice. Timed Exam runs a countdown and keeps explanations hidden until submission. Both modes let you move between questions, use the paper map, and submit for a complete review.
How do I review and download my Fluid Dynamics quiz?
Select Submit Quiz, then Submit & View Explanations. The review includes every question in your test, all options, your selection, the marked correct answer when a key is available, and the explanation. Download PDF saves a paginated review; Download Review saves an HTML copy you can open in a browser. The review also includes DIFF. MDCAT community links.
How should I use Fluid Dynamics MCQs to improve?
Start with a short tutor drill on one of these topics: Terminal Velocity, Fluid Drag, Fluid Flow. Read the explanation for incorrect and uncertain answers, revise the relevant textbook section, and retry before taking a timed drill. Compare your reasoning with the answer key rather than memorising the option letter.