MCQs on Environmental Issues- 22

1. An element in soil will be considered as a trace element if its concentration is

(A) 1 – 2 wt %
(B) < 0.1 wt %
(C) > 2 wt %
(D) < 1 wt %



2. Which of the following is correct about attribute data in Geographic Information System?

(A) Attributes are pieces of data that are connected or related to the points, lines or polygons mapped in the GIS.
(B) Attribute data can be analysed to determine patterns of importance.
(C) Attribute data is entered directly into a database where it is associated with element data.
(D) All of the above



3. Which one of the following chemical species of mercury is highly toxic to living system?

(A) Mercurous ion
(B) Mercuric ion
(C) Organo mercurials
(D) Atomic mercury



4. Natural gas is composed primarily of

(A) Methane
(B) n-butane
(C) n-octane
(D) A mixture of n-octane and n-butane



5. Which of the following is true regarding the Leopold interaction matrix used in Environmental Impact Assessment Process?

(A) It can be expanded.
(B) It can be contracted.
(C) It can be contracted and expanded.
(D) It cannot be contracted and expanded.



6. Which of the following can be considered in Environmental Risk Assessment?

(A) Exposure period
(B) Potency of a toxic material
(C) Quality of models
(D) All of the above



7. In India, Environmental Impact Assessment report of a proposed river valley project after environmental clearance is applicable for a maximal period of how many years?

(A) 5
(B) 10
(C) 30
(D) 2



8. The widely used aerobic suspension type of liquid waste treatment system is

(A) Rotating Biological Contactor (RBC)
(B) Percolating filter
(C) Activated sludge process
(D) Septic tank



9. The treatment designed to remove nonbiodegradable organic pollutants and mineral nutrients from waste water is

(A) Lagoons
(B) Imhoff tank
(C) Secondary treatment
(D) Tertiary treatment


10. Ultraviolet radiations are lethal due to inactivation of

(A) Proteins, nucleic acids and pigments
(B) Minerals, water and air
(C) Carbohydrates, fats and vitamins
(D) O2, CO2 and water



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