Name of the Institute : Dhanalakshmi Srinivasan Institute of Research and Technology
University : Anna University
Degree : B.E
Department : Computer Science & Engineering
Subject Code/Name : GE6351 Environmental Science & Engineering
Year : 2nd
Semester : 3rd
Document Type : Question Bank
Website : dsirt.ac.in
Download Model/Sample Question Paper :
Part-A : https://www.pdfquestion.in/uploads/dsirt.ac.in/3180-GE6351-EVS-Part-A.pdf
Part-B : https://www.pdfquestion.in/uploads/dsirt.ac.in/3180-GE6351-EVS-PART-B-final.pdf
DSIRT Environmental Science Question Paper
Unit-I
1. Define eco system? :
Related : DSIRT CS2301 Software Engineering B.E Question Bank : www.pdfquestion.in/3185.html
An ecosystem can be defined as an area within the natural environment consisting of community of living beings and the physical environment, both interacting and exchanging materials between them.
2. Define food chain and food web? :
Food chain is defined as the sequence of organisms directly dependent on one another for food in an eco system.
Food web is defined as an interconnection of many food chains in an ecosystem.
3. What is ecological succession? :
The gradual process of change in an ecosystem brought about by the progressive replacement of one community by another in a definite order until a stable community is established over a period of time.
4. What is ecological pyramid? :
A pyramid-shaped diagram representing quantitatively the numbers of organisms, energy relationships, and biomass of an ecosystem;
5. What is bio diversity? :
‘Biodiversity’ is defined as the variety of all biological life such as plants, animals, and microorganisms, the genes they contain and the ecosystems they live in.
6. Define genetic diversity and species diversity? :
Genetic diversity refers to bio diversity due to genetic variation within each species. Species diversity refers to the variety of different types of living things on earth.
7. What do you mean by hot spots of bio diversity? :
Hot spots are the areas that are extremely rich in bio-diversity, have high level of endemism and are under constant threat of species extinctions and habitat destruction.
8. What is red data book? :
Red Data Book is a book that provides data on population status of the endangered species of plants and animals.
9. What are endemic species? :
Endemic species are those species of plants & animals which are found exclusively in a particular area and not anywhere else.
10. What are endangered species? :
Endangered species are those species of plants & animals which are present in such small numbers that it is at risk of extinction.
11. What is flora and fauna? :
All forms of plant life that live in a particular geographic region at a particular time in history is called flora.
All animal life that lives in a particular geographic region at a particular time in history is called fauna.
12. Give few examples of endangered and endemic species of india? :
Endemic species :
1 INDIAN DARTER or SNAKE –BIRD
2. LITTLE CORMORANT
Endangered species :
1. Lion
2. Tiger
13. State the significance and scope of environmental education? :
Importance/Significance of the Environmental Studies : Environmental studies
** is concerned with the importance of wild life and its protection
** explains the significant role of biodiversity in establishing ecological balance
** deals with different types of ecosystems, biotic and abiotic factors and their role in the significance and sustenance of ecosystems.
** gives information relating to population explosion, growth and development, impact of population growth on the resource consumption and national economy.
** Explains the significance of forests and their products in the human routine and in country’s economy.
** Gives information about water conservation, watershed management.
Unit-II
1. Define pollutant and pollution? :
Any substance which causes lowering the quality of environment is called pollutant. Lowering of the quality of environment caused by natural and human activities is called environmental pollution.
2. What is air pollution? :
The contamination of the air with dust, fumes, gas, mist, odor, smoke, or vapor which causes harmful effects on living organisms is called air pollution.
3. What do you understand by the term smog? :
Smog is mixture of smoke and fog containing particulates.
4. Define photo chemical smog? :
Smog produced by the reaction of nitrogen oxides with hydrocarbons in the presence of ultraviolet light from the sun is called photo chemical smog.
5. Define water pollution? :
Water pollution is defined as any physical,chemical or biological change in quality of water which causes harmful effects on living organisms.
6. Define marine pollution? :
Addition of harmful chemical substances and waste materials to ocean that makes it harmful to aquatic life is called marine pollution.
7. Define thermal pollution or heat pollution? :
Addition of excess of undesirable heat to water that makes it harmful to aquatic life is called thermal pollution.
8. Define C.O.D& B.O.D? :
C.O.D—Chemical Oxygen Demand
B.O.D—Biochemical Oxygen Demand
The amount of oxygen in water consumed for chemical oxidation of pollutants is called C.O.D
The amount of oxygen taken up by microorganisms that decompose organic waste matter in water is called B.OD
9. What is soil pollution? :
The contamination of soil by chemical or other waste materials resulting in the reduction of its fertility is called soil pollution.
10. What is incineration? :
It is a treatment technology involving destruction of waste by controlled burning at high temperatures.