Computational fluid dynamics MCQ Mechanical Engineering

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About Computational fluid dynamics

Following are some of the multiple choice questions on the Computational fluid dynamics with answers that will help the students in developing their knowledge.

Computational fluid dynamics MCQ

1. Which of the following is an example of thinking computationally?

  • Planning out your route when going to meet a friend
  • When going to meet a friend, wandering around until you find them
  • When going to meet a friend, asking a parent to plan your route for you
  • none of the above

2. According to equation of continuity, A1V1 = A2V2 = constant. The constant is equal to:

  • Flow rate
  • Volume of fluid
  • Mass of fluid
  • Density of fluid

3. What do we mean by COMPUTATIONAL THINKING?

  • Understanding a complex problem and developing possible solutions.
  • Breaking a task into smaller tasks.
  • Selecting a computer to use.
  • Focusing on what is important, ignoring what is unnecessary.

4. In fluid dynamics, which of the following fundamental expressions links pressure to the fluid's speed and height?

  • Pascal's law.
  • Stokes' law.
  • Archimedes' principle.
  • Bernoulli's equation

5. If the discharge is constant, what type of flow does it has?

  • Compressible
  • Laminar
  • Steady
  • Uniform

6. The rate at which fluid flows through a closed pipe can be determined by

  • Determining the mass flow rate
  • Determining the volume flow rate
  • Either (a) or (b)
  • All of above

7. A flow that travels along and collides, resulting to change in flow direction.

  • Laminar Flow
  • Laminent Flow
  • Turculent Flow
  • Turbulent Flow

8. What is TRUE about Fluid Dynamics?

  • It describes the flow of fluids and forces that affects the fluid.
  • It studies aerodynamics and hydrodynamics
  • It shares part with the discussion of Fluid Mechanics
  • All of above

9. Velocity of fluid increases where the pressure is:

  • Low
  • High
  • Constant
  • zero

10. When weight of an object falling freely becomes equal to the drag force, then the body will move with:

  • Increasing speed
  • Decreasing speed
  • Constant speed
  • Constant acceleration

11. The dimensions of coefficient of viscosity is:

  • ML1T-2
  • M2L1T1
  • ML-1T-1
  • ML-1T-2

12. When designing a building that must be accessible for wheelchairs, which of the following characteristics is non-essential?

  • Number of doors
  • Number of walls
  • Number of wall paintings
  • None of these

13. One advantage of abstraction is that it means no mistakes can be made

  • True
  • False

14. Which of the following is not done by decomposition?

  • Allows multiple people to work on the problem together
  • Disregards non-essential information
  • Breaks the problem down into smaller tasks
  • None of these

15. When drawing a dog, which of the following characteristics is non-essential?

  • Dogs have 4 paws
  • Dogs have fur
  • Dogs have brown fur
  • All of above

16. Which of the following is not done by abstraction?

  • Identifies essential details
  • Disregards non-essential information
  • Breaks the problem down into smaller tasks
  • All of above

17. What does abstraction do?

  • The process of removing something unnecessary
  • Breaks something up to make it easier
  • The process of ignoring something unnecessary
  • Looking at a solution that repeats itself

18. What does decomposition mean?

  • focuses on the important information only, ignoring irrelevant detail
  • Step by step instructions on solving a problem.
  • Thinking like a computer
  • This is the breaking down of a complex problem into smaller parts

19. What is computational thinking?

  • It allows you to break down a large / complex problem into smaller parts.
  • It is thinking like a robot
  • It is being able to bake a cake.
  • It is creating a coding solution to a problem.

20. What is a flowchart?

  • A visual representation of an algorithm.
  • A diagram that shows abstraction.
  • A series of shapes.
  • none of the above

21. Concepts under Fluid Dynamics

  • Bernoulli's Principle
  • Equation of Continuity
  • Pressure, Temperature & Composition
  • Both A & B

22. _______________________ is an idea of fluid dynamics. It says that as speed of the fluid increases, pressure decreases. ... For a steady flow, the amount of fluid entering the pipe must equal the amount leaving the pipe, so the fluid speed in the thin part must increase.

  • Newton's First Law
  • Newton's Second Law
  • Newton's Third Law
  • Bernoulli's Principle

23. Pitot tube measures

  • atmospheric pressure
  • Pressure in a car tyre
  • velocity of flow
  • piezometric pressure

24. If cross-sectional area of pipe decreases, the speed of fluid must increase according to:

  • Continuity equation
  • Bernoulli's equation
  • Torricelli's theorem
  • Venture relation

25. If radius of droplet becomes half then its terminal velocity will be:

  • Half
  • Double
  • One forth
  • Four times

26. As the water falls from tap, its speed increases and cross sectional area:

  • Decreases
  • Increases
  • become zero
  • becomes Constant

27. Blood has density equal to that of:

  • Mercury
  • Honey
  • water
  • glycerin

28. When the body reaches its terminal velocity, the acceleration of the body becomes

  • Zero
  • Minimum
  • Maximum
  • Half of the initial

29. One Torr is expressed in π‘π‘šβˆ’2 as:

  • 133.3 π‘π‘šβˆ’2
  • 13.33 π‘π‘šβˆ’2
  • 1.333 π‘π‘šβˆ’2
  • 1333 π‘π‘šβˆ’2

30. The maximum constant velocity of an object falling vertically downward is called:

  • Final velocity
  • Terminal velocity
  • Instantaneous velocity
  • Average velocity

31. The equation 𝐹 = 6πœ‹πœ‚π‘Ÿπ‘£ is called:

  • Newton’s law
  • Stoke’s law
  • Ohm’s law
  • Lenz’s law

32. An object moving through a fluid experience a retarding force called:

  • Drag force
  • Gravitational force
  • Terminating force
  • Frictional force

33. Speed of efflux can be determined by applying:

  • Bernoulli's Equation
  • Continuity Equation
  • Torricelli's Theorem
  • Newton's law of motion

34. A man standing near a fast moving train may fall.

  • Away from the train
  • Towards the train
  • On the same place
  • In the direction of train

35. Branch of applied science that describes the movement of liquid and gases.

  • Fluid Mechanics
  • Fluid Dynamics
  • Equation of Continuity
  • Bernoulli's Principle

36. It states that, "in the case of steady flow, the amount of fluid flowing past one point must be the same as the amount of fluid flowing past another point, or the mass flow rate is constant."

  • Pascal's Principle
  • Buoyancy and Archimedes' Principle
  • Equation of Continuity
  • Bernoulli's Principle

37. It states that, "as the speed of a fluid increases, there is a simultaneous decrease in the pressure of a fluid and a decrease in it's potential energy.

  • Pascal's Principle
  • Buoyancy and Archimedes' Principle
  • Bernoulli's Principle
  • Equation of Continuity

38. BONUS ROUNDIt is the sub-part of Fluid Mechanics that studies the flow of Fluid

  • Fluid Dymanics
  • Fluid Dinanics
  • Fluid Dimamics
  • Fluid Dynamics

39. Both Laminar flow and Turbulent flow occur inside or outside an object.

  • TRUE

40. BONUS ROUNDIt is the branch of science that covers the behavior of fluids in a state of motion or rest.

  • Fluid Dynanics
  • Fluid Dynamics
  • Fluid Mechanics
  • Fluid Mechmics

41. Turbulent flow is

  • Unsteady and regular
  • Steady and regular
  • Unsteady and irregular
  • Steady and regular

42. Bernoulli’s equation is obtained by applying law of conservation of.

  • Mass
  • Energy
  • Momentum
  • Force

43. Venturi meter is a device used to measure:

  • Pressure of the fluid
  • Viscosity of the fluid
  • Velocity of the fluid
  • Density of the fluid

44. The study of properties of fluids in motion is called

  • Fluids Study
  • Fluids statics
  • Fluids dynamics
  • None

45. Abstraction and Decomposition are separate concepts, you would usually choose to do either one or the other

  • True
  • False

46. You could use abstraction to replace specific objects with simple shapes

  • True
  • False

47. This is a good example of decompositionSit downDo homework

  • True
  • False

48. Decomposition allows each task to become _______

  • More manageable
  • Easier
  • Quicker
  • none of the above

49. Decomposition allows the entire task to be completed as _____

  • A Team
  • A Whole
  • Quickly as possible
  • All of above

50. It is always necessary to decompose a task

  • True
  • False

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