# Computational fluid dynamics MCQ Mechanical Engineering

50 Questions 30 Mins

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.
• 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

• Compressible
• Laminar
• 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

• 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

• 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

• 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

• 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

• 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

• 133.3 𝑁𝑚−2
• 13.33 𝑁𝑚−2
• 1.333 𝑁𝑚−2
• 1333 𝑁𝑚−2

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

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

• 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
• SOMEWHAT TRUE
• FALSE
• SOMEWHAT FALSE

### 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

• 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

• True
• False

• True
• False

• 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

• True
• False