World environment day is observed every year on the 5th of___________________?

Related Mcqs:

1. Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about _______________ decibels?

   A. 105
   B. 135
   C. 160
   D. 185

2. Brown spots in fabrics will be caused by washing with water containing large amount of___________________?

   A. Iron
   B. Zinc
   C. Iodine
   D. Bromine

3. The weakest sound that can be heard by a person in a quiet environment is equivalent to ____________ decibel ?

   A. 1
   B. 5
   C. 10
   D. 50

4. A man exposed to excessive noise level in the working environment may suffer from____________________?

   A. Hearing loss
   B. Rupture of ear drum
   C. Nervousness & fatigue
   D. All A., B. & C.

5. As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is _____________ μg/m3.(μg-microgram)?

   A. 10
   B. 90
   C. 800
   D. 750

6. Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is _____________ decibels?

   A. 35
   B. 75
   C. 95
   D. 105

7. World’s worst radioactive pollution was caused by nuclear reactor disaster which occured in ___________________?

   A. Arizona (U.S.A.)
   B. Chernobyl (undivided U.S.S.R.)
   C. Pennsylvania (U.S.A.)
   D. Moscow (U.S.S.R.)

8. The term Biological Oxygen Demand (BOD) is used in relation to ______________________?

   A. Potable water
   B. Cooling water
   C. Distilled water
   D. Industrial effluents

9. Removal of ______________ results from the disinfection of water?

   A. Turbidity
   B. Odour
   C. Hardness
   D. Bacteria

10. When the concentration of SO2 in air is greater than ______________ ppm, it gives a pungent smell?

    A. 0.01
    B. 0.1
    C. 1
    D. 4