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Envs 321:Renewable Energy March 2011 Question Paper

Envs 321:Renewable Energy March 2011

Course:Bachelor Of Environmental Science

Institution: Kabarak University question papers

Exam Year:2011

KABARAK UNIVERSITY
UNIVERSITY EXAMINATIONS
2010/2011 ACADEMIC YEAR
FOR THE DEGREE OF BACHELOR OF ENVIRONMENTAL
SCIENCE
COURSE CODE: ENVS 321

INSTRUCTIONS:
Answer questions ONE and any other TWO questions in Section B

SECTION A
QUESTION ONE
a. Define the following terms citing examples where applicable;
i. Carpeting. (2 marks)
ii. Biofuels (2 marks)
iii. Blending (2 marks)
iv. Pyrolysis (2 marks)
b. Write down three types of biomass, cite two examples for each (3 marks)
c. Discuss three important wind characteristics in wind energy exploitation. (3 marks)
d. Describe how transesterification can be carried out in a small scale. (3 marks)
e. Explain how producer gas can be cleaned and cooled. (3 marks)
f. Discuss three environmental impacts of biodiesel exploitation. (3 marks)
g. Discuss three factors that are desirable for a producer gas feedstock. (3 marks)
h. Explain how ethanol can be cleaned and purified. (3 marks)
i. What is tidal energy? (2 marks)
j. Explain in detail how biodiesel can be made from plants (biomass). (3 marks)
k. Describe the working principle of a solar photovoltaic cell. (3 marks)
l. Biomass fuel exploitation can compete with food security. Elaborate (3 marks)

SECTION B
2. The use of hydrogen fuel provides an environmentally friendly source of energy.
Elaborate this statement and explain how it can be utilized. (10 marks)

3. Wind energy provides a cheap source of energy in rural areas. Discuss this statement and
explain how it can be harnessed. (10 marks)

4. Discuss the various factors you would consider when setting up a biomass gasification
plant. (10 marks)

Envs 321:Renewable Energy March 2011 Question Paper

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