# Wind Turbine Unit Exam

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Wind turbines are a global means of harnessing energy from the wind, as the kinetic energy is converted into electrical power for our use in machines, lights and so on. See how much you know about them with this quiz!

• 1.

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

• A.

Potential energy

• B.

Kinetic energy

• C.

Gravitational energy

B. Kinetic energy
Explanation
Kinetic energy refers to the energy possessed by an object due to its motion. When an object is in motion, it has the ability to do work or cause a change. The amount of kinetic energy an object has depends on its mass and velocity. As the object's velocity increases, its kinetic energy also increases. Therefore, the correct answer is kinetic energy.

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• 2.

### 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

A. Greater
Explanation
The heavier ball will have a greater amount of kinetic energy because kinetic energy is directly proportional to an object's mass. Therefore, since the heavier ball has more mass, it will also have more kinetic energy.

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• 3.

### 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

B. Potential energy converting into kinetic energy
Explanation
When the book is placed on the desk, it has potential energy due to its position above the ground. As it falls off the desk, this potential energy is converted into kinetic energy, which is the energy of motion. Therefore, the correct answer is "Potential energy converting into kinetic energy."

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• 4.

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

• A.

Cycle

• B.

Machine

• C.

System

• D.

Technology

C. System
Explanation
A group of parts working together to achieve a desired goal is referred to as a system. In a system, individual components or parts interact and collaborate with each other in order to accomplish a specific objective or function. This can be seen in various contexts, such as mechanical systems, computer systems, or even social systems. The concept of a system emphasizes the interconnectedness and interdependence of its components, highlighting the importance of coordination and cooperation for achieving the desired outcome.

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• 5.

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

• A.

True

• B.

False

B. False
Explanation
The given statement is false. A system with feedback is not an open loop system. In an open loop system, the output is not dependent on the input or any external factors. However, in a system with feedback, the output is influenced by the input as well as the feedback from the output. The feedback helps in adjusting and controlling the system to achieve the desired output. Therefore, a system with feedback is considered a closed loop system.

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• 6.

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

• A.

Electrical Energy

• B.

Mechanical Energy

• C.

Kinetic Energy

• D.

Solar Energy

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 energy. Therefore, electrical energy is the form of energy that is generated and used as the desired output of a wind turbine.

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• 7.

### Wind turbines _______________ differnt forms of energy.

• A.

Create

• B.

Convert

• C.

Produce

B. Convert
Explanation
Wind turbines convert different forms of energy. Wind energy is converted into electrical energy by the turbines. The blades of the turbine capture the kinetic energy of the wind and convert it into mechanical energy, which is then converted into electrical energy by a generator. Therefore, wind turbines play a crucial role in converting the natural energy of the wind into a usable form of energy.

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• 8.

### Which of the following will  not have an impact on the wind turbine designs output?

• A.

• B.

Rotor weight

• C.

• D.

Construction quality

• E.

None of the above, they will all have an effect the designs output

E. None of the above, they will all have an effect the designs output
Explanation
All of the options listed in the question will have an impact on the wind turbine design's output. The blade angle affects the efficiency of the turbine in capturing wind energy. The rotor weight affects the stability and performance of the turbine. The blade size determines the amount of wind energy that can be captured. The construction quality affects the overall durability and reliability of the turbine. Therefore, none of the options listed will have no impact on the wind turbine design's output.

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• 9.

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

• A.

Vertical

• B.

Horizontal

B. Horizontal
Explanation
This question is asking for the type of axis wind turbine being referred to. The correct answer is "Horizontal." This means that the wind turbine's axis is positioned horizontally, with the blades rotating around a horizontal axis. This type of wind turbine is commonly used in large-scale wind farms and is designed to capture wind energy from the horizontal direction.

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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

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 has several positive impacts. Firstly, it is considered as "GREEN energy" because it is a renewable and clean source of power, which helps to reduce greenhouse gas emissions and combat climate change. Additionally, wind energy creates jobs in the manufacturing, installation, and maintenance of wind turbines, contributing to economic growth. Moreover, it reduces our dependency on petroleum (gas & oil) by providing an alternative source of energy. Lastly, wind energy can also reduce energy costs for consumers, as it provides a cheaper source of electricity compared to traditional fossil fuels.

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• 11.

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

• A.

Gather information

• B.

Redesign & communicate

• C.

Understand the problem

C. Understand the problem
Explanation
Understanding the problem is the first step in the design process. Before beginning any design work, it is crucial to have a clear understanding of the problem that needs to be solved. This involves gathering information, conducting research, and analyzing the problem from various perspectives. Only when the problem is fully understood can effective solutions be developed and implemented.

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• 12.

### 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.

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 analyzing the initial design and identifying any areas that need modification or enhancement. By continually iterating and refining the design, it becomes more effective and efficient in addressing the problem at hand. Additionally, this step also involves effective communication of the design to stakeholders and obtaining feedback, which further aids in improving the design. Overall, the Redesign & Communicate step ensures that the design is constantly evolving and getting better.

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• 13.

### The order of a system is _____________.

• A.

Output --> Input --> Process

• B.

Input --> Process --> Output

• C.

Input --> Output --> Process

B. Input --> Process --> Output
Explanation
The order of a system refers to the sequence in which the components of the system are arranged or organized. In this case, the correct answer suggests that the input is received first, followed by the process, and finally the output is produced. This sequence implies that the system takes in some form of input, applies a process or transformation to it, and then generates an output based on the processed input.

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• 14.

### All technological systems have both positive and negative impacts.

• A.

True

• B.

False

A. True
Explanation
This statement is generally true as all technological systems have benefits and drawbacks. Technological advancements have led to improvements in various aspects of life such as communication, healthcare, and transportation. However, they also bring negative impacts such as environmental pollution, job displacement, and privacy concerns. Therefore, it can be concluded that all technological systems have both positive and negative impacts.

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• Current Version
• Mar 21, 2023
Quiz Edited by
ProProfs Editorial Team
• Oct 28, 2010
Quiz Created by
Glenmackey

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