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EEN701S - ENERGY AND ENVIRONMENT -2ND Opp - JULY 2022 |
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NAMIBIA UNIVERSITY
OF SCIENCE AND TECHNOLOGY
FACULTY OF HEALTH, APPLIED SCIENCES AND NATURAL RESOURCES
DEPARTMENT OF NATURAL AND APPLIED SCIENCES
QUALIFICATION : BACHELOR OF SCIENCE
QUALIFICATION CODE: 07BOSC
COURSE: ENERGY AND ENVIRONMENT
SESSION: JULY 2022
DURATION: 3 HOURS
LEVEL: 7
COURSE CODE: EEN701S
PAPER: THEORY
MARKS: 100
SUPPLEMENTARY/SECOND OPPORTUNITY EXAMINATION QUESTION PAPER
EXAMINER(S) Dr Sylvanus A. Onjefu
MODERATOR: Dr Shobo A. Babajide
THIS QUESTION PAPER CONSISTS OF 3 PAGES
(Including this front page)
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QUESTION 1
.
[23]
1.1 Describe passive solar heating and give one example and one challenge of using it.
(6)
1.2 Should coal deposit be discovered in Namibia and based on your understanding of coal
mining, what argument will you give against surface mining of coal in the country?
(4)
1.3 Differentiate between petroleum and natural gas.
(8)
1.4 How is electricity produced by solar thermal electric generation? Give one problem with
this form of energy.
(5)
QUESTION 2
[21]
2.1 Although synfuels are promising energy sources. What major challenges do you foresee
with regards to their production and usage on the following environmental phenomenon?
2.1.1 Atmosphere.
(3)
2.1.2 Arid areas.
(3)
2.1.3 Topography.
(3)
2.2 How would you explain energy taxes to your uncle in the village and give three negative
effects energy taxes on the citizens of the country.
(8)
2.3, Which of the negative environmental impacts associated with fossil fuels is the most
serious and have attracted global attention? And why?
(4)
QUESTION 3
[21]
3.1 Explain nuclear energy and differentiate between fission and fusion.
(6)
3.2 Explain nuclear enrichment.
(4)
3.3. Describe how electricity is produced from nuclear power under the following parts:
3.3.1 Reactor core.
(2)
3.3.2 Steam generator.
(2)
3.3.3 Turbine.
(2)
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3.3.4 Condenser.
(2)
3.4 Why is there distrust in the international community concerning the proliferation of
weapon-grade plutonium.
(3)
QUESTION 4
[35]
4.1 How is solar energy different from fossil and nuclear fuels?
(4)
4.2 Explain how energy conservation is a major source of energy and list energy conservation
measures that you could adopt for each of the following aspects of your life: washing
laundry, lighting, bathing, driving a car, cooking, and buying a car.
(14)
4.3 Explain four ways in which solar radiation varies in intensity.
(8)
4.4 Explain the problems associated with hydropower generation under the following;
4.4.1 Natural flow of water.
(3)
4.4.2 Creation of reservoir in arid regions.
(3)
4.4.3 Water borne diseases.
(3)
END