CE 250-Exam 1 (quizzes)

What are the dimensions of velocity?

[LT-1]

The code of ethics for American Society for Civil expects engineers to adhere to the principles of sustainable development.

True

In 2017, according to the ASCE Infrastructure Report Card, how many of the 16 infrastructure categories receive a grade of C or higher? (provide a numerical integer)

4

Earning a degree from an ABET accredited program is an important part of achieving a professional engineering license.

True

Forward-looking design informs investment in reliable infrastructure that can better withstand ongoing and future climate risks.

True

If you choose to Study Abroad or do a Co-op, careful planning is required to ensure timely degree completion.

True

One foot of sea level rise can yield more than 1 foot of increase storm surge.

True

Proportional reasoning requires identifying an invariant.

True

For an equation to be dimensionally consistent, the dimensional exponents must:

be the same on both sides of the equation

A person is not necessarily a driver.

structural uncertainty

What are possible units for x when y has dimensions of [L-1M] and z has dimensions of [L2T-2], given the following equation (check all that apply) 4x = y2z

tonne2/(hr2) kg2/(s2)

Human activities were estimated to have caused approximately ___oC of global warming above pre-industrial levels.

1.0

Two streams (A and B) converge. Stream A has a flow rate of 10 cubic meters per minute and has a concentration of a conservative pollutant of 312 micrograms per liter. Stream B has a flow rate of 10 cubic meters per minute and has no detectable levels of the pollutant. What is the downstream concentration of the pollutant?

156 micrograms per liter

In a tree diagram, the notation "-1" indicates:

A term should be raised to -1 exponent

Emissions of sulfur dioxide and nitrogen oxides lead to:

Acidification

Climate Change Mitigation

Actions to limit the magnitude of climate change, typically through reductions in human (anthropogenic) emissions of greenhouse gases or increasing the capacity of carbon sinks (e.g., reforestation)

Which of the following infrastructure can be affected by sea level rising?

Bridges Roads Airports Rail

We use "CO2-eq" to:

Bring the climate change impacts of different greenhouse gases to a common unit

Which of the following are examples of climate change adaptation for the transportation sector?

Build longer runways at airports Dedicate crews for quick repairs of transportation infrastructure Replace and/or reconstruct highway and bridge expansion joints

Which of the following are examples of climate change mitigation?

Building a 100 MW solar photovoltaic facility Improving the average fuel economy of light duty vehicles Eliminating fugitive methane emissions from landfills

Which of the following are ozone-depleting substances?

CFCs HFCs Halons

What is the main cause of ocean acidification?

CO2

There are Sustainable Development Goals that relate to:

Climate change Economic growth Poverty Inequality Aquatic ecosystems

What are the three pillars of sustainability?

Economic, Environmental, Social

The "eq" in terms such as CO2-eq stands for:

Equivalents

Excess fertilizer runoff leads to:

Eutrophication

Representative Concentration Pathways (RCPs) are used to:

Evaluate the impacts of different scenarios of greenhouse gas concentrations

According to the ISO Life Cycle Assessment Framework, Life Cycle Assessment is a one directional process.

False

All anthropogenic actions lead to increases in radiative forcings.

False

All critical path courses are offered both in the fall and spring semesters.

False

ISO stands for International Sustainability Organization

False

Ozone (O3) in the stratosphere leads to detrimental impacts on human health and ecosystems.

False

Sustainable development calls for sacrificing meeting our needs today so that future generations can meet theirs.

False

The Accelerated Bachelors-to-Masters program allows you to double count up to six credit hours toward a graduate degree.

False

When performing an LCA on a product, conforming to the ISO LCA Standard guarantees the same answer from different parties.

False

When you have earned enough credits to achieve "senior status," you have met the requirements for Senior Design.

False

In the ISO Life Cycle Assessment Framework, what are included in "Goal and scope definition?

Functional Unit Purpose of study System boundary

You plan to use the divide and conquer technique to estimate the number of people who would use a proposed train station each year. What term would be suitable for the top of your tree diagram?

Passengers/year

Climate Change Adaptation

The process of adjustment to actual or expected climate and its effects, in order to moderate harm or exploit beneficial opportunities

The Course Equivalency website tells you:

If a course taken at another university will count for an NC State requirement

What are dimensions?

Length, temperature, time

What do the "leaves" represent in a tree diagram?

Subdivisions of the goal

The gravitational constant, G, is defined as 6.67 x 10-11 N.m2/(kg2). G has dimensions of ___.

M-1L3T-2

Thorough life cycle thinking considers

Materials processing Manufacturing Use End of life

Which of the followings is/are climate impacts?

More frequent and higher temperatures Sea level rise, storm surge Changing precipitation patterns

You are conducting an LCA to compare the environmental impacts of riding an electric bike vs taking a public bus. Why would you not choose "one mile of transport" as the functional unit for your study?

More than one person is typically riding the bus at any given time

Dimensional analysis can tell you if an equation is wrong, but is not sufficient to tell you that it is correct.

True

Which of the following is NOT a greenhouse gas?

NO2

Tropospheric ozone formation is governed by complex chemical reactions, which are influenced by ambient concentrations of ___.

NOx VOCs

Double counting CE courses is a good way to:

Not graduate, because it's not allowed.

You are conducting an LCA to compare the environmental impacts of two pavement designs for a highway. Why might "one mile of highway" be an inadequate functional unit?

One pavement design may last longer than the other

Release of chlorofluorocarbons (CFCs) which are used as refrigerants leads to:

Ozone depletion

You are asked to estimate the number of major airports in the United States using proportional reasoning. You know that North Carolina has two major airports and a population of about 10 million. You also know that the US population is about 330 million, so you assume that the US has 33 times as many airports as North Carolina (i.e., roughly 66 major airports in the US). What was your invariant in your estimation?

Population/airport

Which of the following are impacts of rising temperatures and extreme heat events?

Reduction in the generation capacity of thermoelectric power plants Decrease in the carrying capability of the transmission grid Increase in the electricity demand for air conditioning

Ways to get involved with undergraduate research include:

Taking CE499 Participating in the NCSU RISE program over the summer Applying for funded positions with faculty

Fuel combustion and energy use are the primary cause of

Smog Acidification

You simplified your model to exclude on-ramps and off-ramps.

Structural uncertainty

Shows the requisites for our courses Shows the set of electives that fulfills some requirements Shows whether the courses are offered in the fall or spring

The Plan of Work

Climate change has the potential to adversely impact agricultural productivity through alterations in

The correct answers are: rainfall patterns more frequent occurrences of climate extremes (e.g., high temperatures or drought) altered patterns of pest pressure

Annual cycles for global atmospheric CO2 concentrations are driven by:

The different mass of vegetation between the Northern and Southern hemispheres

You are conducting an LCA to compare the environmental impacts of incandescent lightbulbs and LEDs, which are far more efficient. Why would you not choose "1 kWh" as the functional unit for your study?

The lightbulbs' function is not to consume electricity

According to the IPCC Summary Report, 1983-2012 was likely the warmest 30-year period in the Northern Hemisphere in the last 1400 years (medium confidence).

True

Carbon dioxide emissions lead to:

climate change

What is the most environmentally friendly way to package and transport food? Which building design results in the lowest overall environmental impact Is paper, plastic, or textile bags the most environmentally friendly option for carrying groceries?

involves Life Cycle Thinking?

Which of the following is the possible unit for dimensions [ML2T-2]:

kg*m2/(s2)

The fundamental dimensions M, L, and T stand for:

mass, length, time

You are not sure about your vehicle miles traveled and need to make a guess. You make a guess in the average fuel economy (e.g., miles per gallon) of your car.

parametric uncertainty