# Wind Turbine Exam W/ Bernoulli Principal

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Quizzes Created: 2 | Total Attempts: 509
Questions: 25 | Attempts: 245

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• 1.

### According to Bernoulli’s principle if velocity increases pressure _____________?

• A.

Increases

• B.

Decreases

• C.

Does Nothing

• D.

None of the Above

• E.

I Don't Know

B. Decreases
Explanation
According to Bernoulli's principle, as the velocity of a fluid increases, the pressure it exerts decreases. This is because when the fluid is moving faster, the molecules have less time to collide with each other and with the walls of the container, resulting in lower pressure. Therefore, the correct answer is "Decreases".

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• 2.

### According to Bernoulli’s principle if pressure increases then velocity must ______.

• A.

Decrease

• B.

Increase

• C.

Does Nothing.

• D.

None of the Above

• E.

I Don't Know

A. Decrease
Explanation
According to Bernoulli's principle, there is an inverse relationship between pressure and velocity in a fluid flow. When pressure increases, the velocity of the fluid must decrease. This principle is based on the conservation of energy, where an increase in pressure leads to a decrease in kinetic energy, resulting in a decrease in velocity. Therefore, the correct answer is "Decrease."

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• 3.

### If the pressure under the wing of an airplane is greater than the pressure on top of the wing, the airplane should ______.

• A.

Fall

• B.

Land

• C.

Lift

• D.

A and B

• E.

I Don't Know

C. Lift
Explanation
When the pressure under the wing of an airplane is greater than the pressure on top of the wing, it creates a pressure difference that results in lift. This lift force helps the airplane to overcome gravity and stay airborne. Therefore, the correct answer is "Lift."

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• 4.

### Energy an object has due to it's motion is______________.

• A.

Potential Energy

• B.

Kinetic Energy

• C.

Gravitational Energy

• D.

I Don't Know

B. Kinetic Energy
Explanation
Kinetic energy is the energy possessed by an object due to its motion. It is dependent on the mass and velocity of the object. As an object moves faster, its kinetic energy increases. Therefore, the correct answer is Kinetic Energy.

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• 5.

### Two balls are rolling at the same speed. One ball weighs more than the other. The heavier ball will have a __________ amount of kinetic energy.

• A.

Greater

• B.

Less

• C.

Equal

• D.

I Don't Know

A. Greater
Explanation
The heavier ball will have a greater amount of kinetic energy because kinetic energy is directly proportional to the mass of an object. Since the heavier ball has more mass, it will have more kinetic energy compared to the lighter ball, even if they are rolling at the same speed.

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• 6.

### A book is placed on a desk. As it falls off of the desk it is an example of ________________.

• A.

Kinetic energy converting into potential energy

• B.

Potential energy converting into kinetic energy

• C.

I Don't Know

B. Potential energy converting into kinetic energy
Explanation
As the book falls off the desk, it is moving from a higher position (potential energy) to a lower position (kinetic energy). This indicates a conversion of potential energy into kinetic energy.

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• 7.

### What form of energy is the desired output of the wind turbine?

• A.

Electrical Energy

• B.

Mechanical Energy

• C.

Solar Energy

• D.

Kinetic Energy

• E.

I Don't Know

A. Electrical Energy
Explanation
The desired output of a wind turbine is electrical energy. Wind turbines convert the kinetic energy of the wind into mechanical energy, which is then used to generate electricity. This is achieved through the rotation of the turbine's blades, which spin a generator to produce electrical power. The electrical energy generated can be used to power homes, businesses, and other electrical devices.

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• 8.

### Wind turbines _______________ differnt forms of energy.

• A.

Convert

• B.

Create

• C.

Produce

• D.

I Don't Know

A. Convert
Explanation
Wind turbines convert wind energy into different forms of energy.

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• 9.

### This is an example of a ____________ axis wind turbine?

• A.

Vertical

• B.

Horizontal

• C.

I Don't Know

B. Horizontal
Explanation
This question is asking for the type of axis wind turbine being referred to. The correct answer is "Horizontal." A horizontal axis wind turbine has its rotor shaft parallel to the ground, with the blades rotating horizontally. This is the most common type of wind turbine used for generating electricity. Vertical axis wind turbines, on the other hand, have their rotor shaft perpendicular to the ground, with the blades rotating vertically.

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• 10.

### Which of the following could be positive impacts of wind energy?(Hint: you can select more than one)

• A.

It is GREEN energy

• B.

It creates jobs

• C.

It is loud

• D.

It reduces our dependency on petroleum (gas & oil)

• E.

It can disrupt bird migration

• F.

It can reduce energy costs

• G.

I Don't Know

A. It is GREEN energy
B. It creates jobs
D. It reduces our dependency on petroleum (gas & oil)
F. It can reduce energy costs
Explanation
Wind energy is considered green energy because it is a renewable and clean source of power, producing no greenhouse gas emissions or air pollution. Additionally, the development and maintenance of wind energy projects create job opportunities in the renewable energy sector. Wind energy also helps reduce our dependency on petroleum by providing an alternative source of power, reducing the need for fossil fuels. Lastly, wind energy can help reduce energy costs by providing a cost-effective source of electricity.

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• 11.

### Which one is a renewable energy

• A.

Coal

• B.

Oil

• C.

WInd

• D.

Natural Gas

• E.

I Don't Know

C. WInd
Explanation
Wind is a renewable energy source because it relies on the natural movement of air currents, which are constantly replenished by the sun's heat. Unlike fossil fuels such as coal, oil, and natural gas, which are finite resources and take millions of years to form, wind energy can be harnessed indefinitely without depleting the Earth's resources. Wind turbines convert the kinetic energy of the wind into electricity, making it a sustainable and environmentally friendly option for generating power.

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• 12.

### Can Energy be Created

• A.

Yes

• B.

No

B. No
Explanation
According to the law of conservation of energy, energy cannot be created or destroyed, it can only be converted from one form to another. This principle is known as the first law of thermodynamics. Therefore, the correct answer is "No" because energy cannot be created.

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• 13.

### Which of the following is a form of energy

• A.

Solar

• B.

Nuclear

• C.

WInd

• D.

All of the above

• E.

I Don't Know

D. All of the above
Explanation
All the options listed - solar, nuclear, and wind - are forms of energy. Solar energy is derived from the sun's radiation, nuclear energy is generated through nuclear reactions, and wind energy is harnessed from the movement of air. Therefore, all of the above options are valid forms of energy.

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• 14.

### The Tech Design Process is NOT a continous loop of steps to be completed to help solve problems.

• A.

True

• B.

False

B. False
Explanation
The Tech Design Process is a continuous loop of steps to be completed to help solve problems. This means that it is not a one-time linear process, but rather a cyclical process that involves iterating and refining the design based on feedback and testing. This allows for continuous improvement and adaptation to better address the problem at hand.

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• 15.

### Constructing a prototype comes before developing possible solutions.

• A.

True

• B.

False

B. False
Explanation
Developing possible solutions comes before constructing a prototype. In the design process, after identifying a problem or need, the next step is to brainstorm and generate a variety of potential solutions. This involves exploring different ideas, concepts, and approaches to address the problem. Once multiple possible solutions have been developed, the next step is to select the most promising one and create a prototype to test and evaluate its effectiveness. Therefore, constructing a prototype is a later stage in the design process, following the development of possible solutions.

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• 16.

### The "Testing and Evaluating" step consist of?

• A.

Implenting the soloution

• B.

Verifing if the solution works

• C.

Examining the effectiveness of the solution

• D.

All of the above

• E.

I Don't Know

D. All of the above
Explanation
The "Testing and Evaluating" step consists of implementing the solution, verifying if the solution works, and examining the effectiveness of the solution. This means that all of these actions are included in the testing and evaluating process.

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• 17.

### ___________ is the first step in the design process.

• A.

Gather Information

• B.

Redesign & Communicate

• C.

Understand the Problem

• D.

I Don't Know

C. Understand the Problem
Explanation
The first step in the design process is to understand the problem. This involves gathering information, identifying the challenges or issues that need to be addressed, and gaining a clear understanding of the requirements and objectives. By understanding the problem thoroughly, designers can then proceed to brainstorming and generating potential solutions.

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• 18.

### Why is the Redesign & Communicate step of the design process important?

• A.

It helps to gather information about the problem.

• B.

It allows designs to be continually improved.

• C.

It helps to test design solutions.

• D.

I Don't Know

B. It allows designs to be continually improved.
Explanation
The Redesign & Communicate step of the design process is important because it allows designs to be continually improved. This step involves evaluating and analyzing the initial design solutions, identifying any flaws or areas for improvement, and making necessary adjustments or modifications. By continually iterating and refining the design, it becomes more effective, efficient, and aligned with the desired goals and objectives. This step also involves effective communication and collaboration with stakeholders, ensuring that their feedback and input are incorporated into the redesign process.

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• 19.

### A group of parts working together to achieve a desired goal is a _____________.

• A.

Cycle

• B.

Machine

• C.

System

• D.

Technology

• E.

I Don't Know

C. System
Explanation
A system is a group of interconnected parts that work together to achieve a desired goal. It involves the coordination and interaction of these parts to function as a whole. This term is commonly used in various fields such as engineering, biology, and management to describe the organization and functioning of complex entities.

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• 20.

### A system with feedback is a open loop system.

• A.

True

• B.

False

B. False
Explanation
A system with feedback is not an open loop system. In an open loop system, there is no mechanism to monitor or adjust the output based on the input. However, in a system with feedback, the output is continuously monitored and compared to the desired output, and adjustments are made accordingly. This feedback loop allows for greater control and accuracy in the system's performance. Therefore, the statement that a system with feedback is an open loop system is false.

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• 21.

### The order of a system is _____________.

• A.

Output --> Input --> Process

• B.

Input --> Process --> Output

• C.

Input --> Output --> Process

• D.

I Don't Know

B. Input --> Process --> Output
Explanation
The order of a system refers to the sequence in which the different components of the system are arranged or organized. In this case, the correct answer is "Input --> Process --> Output" which means that the input is received first, then it undergoes a process or transformation, and finally, the output is generated. This sequence is commonly followed in many systems where input data is processed to produce an output or result.

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• 22.

### All  systems have both positive and negative outputs.

• A.

True

• B.

False

A. True
Explanation
All systems have both positive and negative outputs because systems are designed to process inputs and produce outputs. In many cases, the outputs of a system can be categorized as either positive or negative based on their impact or effect. Positive outputs refer to the desired or beneficial results produced by the system, while negative outputs refer to undesired or detrimental results. This duality of outputs is inherent in the functioning of systems, as they aim to achieve certain goals or objectives while also having potential drawbacks or unintended consequences.

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• 23.

### Resources are part of which step in the System's Model

• A.

Input

• B.

Process

• C.

Output

• D.

Feedback

• E.

I Don't Know

B. Process
Explanation
In the System's Model, resources are considered as part of the process step. The process step involves utilizing the available resources to transform inputs into outputs. Resources can include materials, equipment, human resources, or any other necessary components required for the successful execution of the process. Therefore, resources play a crucial role in the process step of the System's Model.

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• 24.

### The spoiler of a car is shaped so that pressure stays on the _____ of the car.

• A.

Bottom

• B.

Top

• C.

Side

• D.

Opposite side

• E.

I Don't Know

B. Top
Explanation
The spoiler of a car is shaped so that pressure stays on the top of the car. Spoilers are designed to disrupt the airflow over the car, creating downforce on the top of the vehicle. This downforce helps to improve traction and stability at high speeds, allowing the car to stay planted on the road. By keeping the pressure on the top of the car, the spoiler helps to increase grip and prevent the car from becoming airborne or losing control.

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• 25.

### Bernoulli's Principal applies to which of the following?There is more than 1 correct answer, please check all that can apply.

• A.

Sailing

• B.

Flight

• C.

Wind Turbines

• D.

Automotive Racing

• E.

I Don't Know

A. Sailing
B. Flight
C. Wind Turbines
D. Automotive Racing
Explanation
Bernoulli's Principle applies to sailing, flight, wind turbines, and automotive racing. This principle states that as the speed of a fluid (liquid or gas) increases, its pressure decreases. In sailing, the principle is used to explain how the shape of a sail creates lift and propels the boat forward. In flight, it explains how the shape of an airplane wing generates lift. In wind turbines, it is utilized to convert wind energy into rotational motion. In automotive racing, it is relevant in designing aerodynamic features to enhance speed and performance.

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