ENVSTD Test 3 UPDATED Actual Exam Questions and CORRECT Answers
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Course
ENVSTD
Institution
ENVSTD
ENVSTD Test 3 UPDATED Actual Exam
Questions and CORRECT Answers
Which statement correctly describes the current alternatives to fossil fuel energy? -
CORRECT ANSWER- A. Alternatives to fossil fuels supply less than one-fifth of global
energy demand
Select the technology that creates electric...
ENVSTD Test 3 UPDATED Actual Exam
Questions and CORRECT Answers
Which statement correctly describes the current alternatives to fossil fuel energy? -
CORRECT ANSWER✔✔- A. Alternatives to fossil fuels supply less than one-fifth of global
energy demand
Select the technology that creates electricity from flowing air.
a. photovoltaic panel c. fuel cell
b. wind turbine d. heliostat - CORRECT ANSWER✔✔- Wind turbine
In wind power, the capacity for electricity production changes according to the time of day,
weather
conditions, and other factors. This challenge of wind power is called
a. wind farming. c. variable generation.
b. cogenerating. d. turbine inefficiency. - CORRECT ANSWER✔✔- C. Cogenerating
Select the example of a drawback of wind power.
a. Turbines must always run at maximum capacity regardless of wind speed.
b. The reliance on steam requires a supply of water for cooling the turbines.
c. Even sites with strong, steady winds cannot produce electricity efficiently.
d. The large, spinning blades of wind turbines kill wildlife, such as birds. - CORRECT
ANSWER✔✔- D. The large, spinning blades of wind turbines kill wildlife, such as birds
Which technology produces electricity directly with exposure to sunlight?
a. concentrated solar thermal plant c. rooftop solar collector
b. photovoltaic solar panel d. All of these are correct. - CORRECT ANSWER✔✔- B.
Photovoltaic solar panel
Select the correct statement regarding electric vehicles.
a. Electric vehicles are powered by an electric motor using a magnetic field to generate
motion.
, b. Electric vehicles use about 80% of the energy that they create.
c. Electric vehicles make up less than 1% of passenger cars in the United States.
d. All of these are correct. - CORRECT ANSWER✔✔- D. All of these are correct
Fuel-cell vehicles emit
a. water. c. hydrogen.
b. oxygen. d. carbon dioxide. - CORRECT ANSWER✔✔- A. Water
Which statement correctly describes ethanol?
a. Ethanol is a type of biofuel made of alcohol produced by fermenting plant sugars.
b. Most gasoline in the United States now contains a blend of at least 85% ethanol.
c. Less than 10% of the corn grown in the United States is used for ethanol production.
d. All of these are correct. - CORRECT ANSWER✔✔- A. Ethanol is a type of biofuel made
of alcohol by fermenting plant sugars
Select an advantage of running electric vehicles with hydrogen fuel cells instead of
rechargeable
batteries.
a. Refueling a hydrogen fuel-cell vehicle is much quicker than recharging vehicle batteries.
b. A distribution network already exists for hydrogen refueling, but not for recharging
stations.
c. Hydrogen fuel cells only emit water, whereas battery operation produces greenhouse
gases.
d. All of these are correct. - CORRECT ANSWER✔✔- Refueling a hyrdrogen fuel-cell is
much quicker than recharging vehicle batteries
Which scenario presents a possible environmental impact due to hydrogen fuel cells?
a. The fuel cells are used to power internal combustion engines rather than electric motors.
b. The electricity used to supply the fuel cells with hydrogen is produced using fossil fuels.
c. The combined exhaust emissions from fleets of buses equipped with fuel cells generates
smog.
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