Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is _______________ micro gram (μ g)/litre?

Related Mcqs:

1. Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about ______________ ppm (parts per million)?

   A. 0.002
   B. 0.2
   C. 1.2
   D. 4.8

2. TLV of aldrin in public water supply system is about ____________ μg/litre?

   A. 0.5
   B. 17
   C. 357
   D. 1097

3. 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

4. A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from ______________ ppm?

   A. 1000 to 2000
   B. 3000 to 6000
   C. 6000 to 9000
   D. 10000 to 100000

5. Maximum permissible residual chlorine in treated water should be ____________ mg/litre?

   A. 0.001 to 0.01
   B. 0.2 to 0.3
   C. 2 to 3
   D. 5 to 10

6. Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in ‘gas chamber’ is about ______________ ppm?

   A. < 1
   B. 10-100
   C. 100-200
   D. 100-1000

7. Permissible safe limit (TLV) of _____________ toxic gas is 100-1000 parts per million (ppm)?

   A. Highly
   B. Moderately
   C. Extremely
   D. Very extremely

8. Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by_______________?

   A. Chlorination
   B. Treating in biological oxygen pond
   C. Chemical coagulation
   D. None of these

9. TLV of lead for public sewer/waste water is about ______________ ppm?

   A. 1
   B. 25
   C. 150
   D. 650

10. Out of the following, TLV of _______________ is maximum (about 500 ppm)?

    A. Carbon dioxide
    B. Toluene
    C. Carbon disulphide
    D. Acetaldehyde