The abbreviation MPN stand for:

Related Mcqs:

1. The abbreviation CEC of soil broadly refers to:

   A. Cation storage capacity
   B. Reversible bending of cations
   C. Excess of monovalent cations
   D. Excess of polyvalent cations

2. Advantages of mixed stand are:

   A. Utilization of site properly
   B. Wind damages
   C. Snow damages
   D. Insect damages
   E. All of the above

3. Degree of crown density in a forest stand is:

   A. Closed
   B. Dense
   C. Thin
   D. Open
   E. All of the above

4. Loss of forests, urbanization, increasing pollution are all due to:

   A. Population explosion
   B. Nitrogen di-oxide
   C. Global warming
   D. Sulphur dioxide

5. The use DDT is banned now a days because it is:

   A. Very costly
   B. Not available
   C. Inflammable
   D. Not degraded easily

6. BOD stands for:

   A. Biotic oxygen deduction
   B. Base of degradation
   C. Biotic oxide demand
   D. Biological oxygen demand

7. The major drawback of DDT as a pesticide is that:

   A. Its cost of production is high
   B. It is not rapidly degraded in nature
   C. Organisms at once developed resistance to it
   D. It is significantly less effective than other pesticides

8. To check sonic booms, control should be exerted over:

   A. Traffic on high ways
   B. Sirens of every kind
   C. Air traffic directions
   D. Noise producing devices

9. The photochemical smog is also called:

   A. Los Angeles type smog
   B. New York type smog
   C. Tokyo type smog
   D. California type smog

10. The effect of today’s radioactive fallout will probably be more harmful to children of future generations than to children now living because:

    A. Contamination of milk supply is not cumulative
    B. Infants are more susceptible to radiation
    C. Susceptibility to radiation increases with age
    D. Mutated genes are frequently recessive