National Open University of
Nigeria
14-16 Ahmadu Bello Way, Victoria Island Lagos
School of science and Technology
October/November 2013
Examination
Corse Code: ESM 444
Course Title: INDUSTRIAL WASTES AND INDUSTRIAL WATER
TREATMENT
TIME: 2HRS
ANSWER ANY FOUR QUESTIONS
1a. describe how close circulation system operates.
b. briefly explain what causes increase in corrosion and how
it is controlled in a closed system
c. states he advantages of closed re-circulating water
system
2a. describe the different methods of boiler water treatment
b.what are involved in boiler water treatment ? list five
c. explain the problems that are common to boilers
3a. write short note on the following
i. preliminary treatment
ii. Primary treatment
iii. Biological treatment
iv. Chemical treatment, in relation to industrial waste
water treatment
b. describe briefly the treatment of
i. toxic material
ii. Acids and alkalis in waste water
4. Write extensively on the following
i. how are industrial wastes produced ?
ii. Impact of industrial waste on the environment
5a. what is waste management?
b. discuss any two methods of disposing waste
c. state the various means of reducing waste
6a. explain the process involved in recycling an organic
waste
b. outline the Advantages of recycling waste
c. what is recycling?
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you can also attend Online Classes,Online Colleges,online tutorials. to be well prepared for exam Goodluck.
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you can also attend Online Classes,Online Colleges,online tutorials. to be well prepared for exam Goodluck.
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