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EEN701S - ENERGY AND ENVIRONMENT -1ST OPP - JUNE 2023 |
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nAm I BI A un IVE RSITY
OF SCIEnCE Ano TECHnOLOGY
FACULTYOF HEALTH,NATURAL RESOURCESAND APPLIEDSCIENCES
SCHOOLOF NATURALAND APPLIEDSCIENCES
DEPARTMENT OF BIOLOGY,CHEMISTRYAND PHYSICS
QUALIFICATION: BACHELOR OF SCIENCE
QUALIFICATIONCODE: 07BOSC
COURSE: ENERGYAND ENVIRONMENT
SESSION:JUNE 2023
DURATION: 3 HOURS
LEVEL: 7
COURSECODE: EEN701S
PAPER:THEORY
MARKS: 100
FIRSTOPPORTUNITY EXAMINATION QUESTION PAPER
EXAMINER(S) Prof Sylva nus A. Onjefu
MODERATOR: Dr Valentine T. Chabata
INSTRUCTIONS
1. Write all your answers in the booklet provided.
2. Begin each question on a new page
PERMISSIBLEMATERIALS
1. Non-Programmable Scientific Calculator
THIS QUESTION PAPERCONSISTSOF 3 PAGES
(Including this front page)
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QUESTION 1
1.1 Explain how crude oil is formed and the function of oxygen and heat in its formation.
(5)
1.2 How is natural gas different from crude oil?
(4)
1.3 Describe surface mining.
(4)
1.4 Explain the environmental impacts of surface mining processes
and burning of coal.
(6)
1.5 Give four reasons why most power plants prefer the use of anthracite.
(4)
QUESTION 2
[22)
2.1 Give two human safety issues and two health risk associated with
coal mining.
(4)
2.2 Discussacid precipitation and how it occurs.
(4)
2.3 Briefly explain how Sulphur emission associated with combustion of coal can be
reduced.
(5)
2.4 Describe the clean coal technology and give one example of clean coal technology.
(4)
2.5 Why do you think the production and use of synfuels should be discouraged?
(5)
QUESTION 3
[28)
3.1 Explain the term radiation.
(2)
3.2 Discussthe three-water circuit in a typical nuclear power plant.
(9)
3.3 Describe the safety features of a nuclear power under the following parts:
3.3.1 Reactor vessel.
(4)
3.3.2 Containment building.
(4)
3.4 Explain the breeder nuclear fission and why there is public distrust for it.
(5)
3.5 What do you understand by nuclear meltdown?
(4)
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QUESTION 4
[27]
4.1 Briefly discuss two ways in which solar energy is different from fossil and nuclear fuels. (4)
4.2 Describe the working of photovoltaic solar cells.
(4)
4.3 The Government of Namibia plans to decommission her nuclear power plant. However,
it has been argued that the internationally recommended first and second options of
decommissioning a nuclear power plant is not suitable for the country.
4.3.1 Explain the third internationally acceptable option for decommissioning a nuclear power
Plant.
(2)
4.3.2 What are the safety measures that should be put in place to protect workers?
(3)
4.3.3 What could be the likely risk to both workers and the environment?
(3)
4.4 Described the source of energy called the Ocean thermal energy conversion.
(4)
4.5 Is Ocean thermal energy conversion possible in Namibia? And why?
(2)
4.6 What is your argument against the use of crop residue as biomass fuel?
(5)
END
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