Engineering PS

Many people use microwave ovens to cook their food. Which option is best described as an engineering endeavor related to microwave ovens?

• Performing experiments to determine how microwaves affect food nutrition

• Researching the way people use microwave ovens to determine how to improve their design

• Studying how microwaves are different from other forms of radiation

• Investigating questions about effects that the use of microwave ovens has on human health

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Which statement illustrates how engineering has influenced society?

• People demand that the cost of powering their homes be more affordable.

• People want the source of their electricity to be provided responsibly.

• Nuclear power plants generate power from the energy stored in atoms.

• Nuclear power plants provide cheap electricity to power people's homes.

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NGSS.HS-ETS1-1

The use of seat belts in cars has significantly reduced the number of crash fatalities. Which statement best explains how societal demand guided the development of seat-belt technology?

• Engineers developed seat-belt technology and then began a public awareness campaign to educate people on how they could be used to make cars safer.

• Car manufacturers recognized the dangers of not wearing seat belts in cars and then lobbied the government to make laws that required their use.

• When new seat-belt technology became available, consumers began to demand their inclusion in all new cars.

• Engineers improved the design of seat belts because consumers wanted them to be easier to use.

In the engineering design process, what do engineers do immediately after testing a prototype?

• Communicate the solution.

• Select one solution.

• Iterate to improve the solution.

• Brainstorm multiple solutions.

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A team of engineers is asked to help a community improve local air quality. What must the team do before it can begin to identify possible solutions?

• Iterate to improve the solution.

• Define the problem.

• Select one solution.

• Model the solution.

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NGSS.MS-ETS1-1

An engineer is designing a tire for heavy machinery. Which statement describes the clearest criterion for the solution?

• It must function safely under a load of 4,500 kg.

• It can be made only from materials imported from Brazil.

• It must cost less than $125 to manufacture.

• It must provide customers with a high degree of satisfaction.

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NGSS.MS-ETS1-1

Which statement best describes how scientists and engineers work together in the research and development cycle?

• Scientists develop new technology, and then engineers use it to solve design problems.

• Engineers make a new discovery about nature, and then scientists do experiments to verify it.

• Scientists make a discovery, and then engineers use it to help them solve problems with their designs.

• Engineers develop a new technology, and then scientists use it to solve design problems.

An engineering team has a goal of developing a bicycle frame that is both lighter and stronger than previous models. Which cost-benefit analysis has left out potential risks?

• Increased sales compared to employee stress and loss of natural resources

• Better function compared to uncertain supply of materials and research and development time

• Increased sales compared to research and development time and cost of materials

• Better function compared to ecological damage of mining materials and research and development time

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Which option is a potential environmental benefit of adopting a new technology?

• Expanded customer base

• Reduced emission of pollutants

• Higher numbers of sales

• Improved product quality

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How can negative feedback influence the stability of a system?

• It makes a system unstable by increasing its output.

• It makes a system unstable by decreasing its input.

• It keeps a system stable by increasing its input.

• It keeps a system stable by decreasing its output.