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e-waste pollutes environment by __________________.
1. leaching into soil.
2. uncontrolled fires at landfills.
3. incineration emits toxic fumes.
4. acids and sludge from melting chips contaminate water.
Select the correct answer using the codes given below :-
- 1 and 2
- 2 and 3
- 1, 2 and 3
- All of these
A
1 and 2
B
All of these
C
1, 2 and 3
D
2 and 3
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Q1
e-waste pollutes environment by __________________.
1. leaching into soil.
2. uncontrolled fires at landfills.
3. incineration emits toxic fumes.
4. acids and sludge from melting chips contaminate water.
Select the correct answer using the codes given below :-
1. leaching into soil.
2. uncontrolled fires at landfills.
3. incineration emits toxic fumes.
4. acids and sludge from melting chips contaminate water.
Select the correct answer using the codes given below :-
View Solution
Q2
Match List - I with List - II and select the correct answer using the codes given below the lists.
List - I List - II
A . Thickening of 1. Decrease in volume
sludge of sludge by chemical oxidation
B. Stabilization of 2. Separation of water
sludge by heat or chemical
treatment
C. Conditioning of 3. Digestion of sludge
sludge
D. Reduction of 4. Separation of
sludge water by floatation
or gravity
Codes:
ABCD
List - I List - II
A . Thickening of 1. Decrease in volume
sludge of sludge by chemical oxidation
B. Stabilization of 2. Separation of water
sludge by heat or chemical
treatment
C. Conditioning of 3. Digestion of sludge
sludge
D. Reduction of 4. Separation of
sludge water by floatation
or gravity
Codes:
ABCD
View Solution
Q3
Match List -I (Hydraulic structure) with List-II (Water surface profile at the structure) and select the correct answer using the codes given below the lists:
Lists - I Lists -II
A. On a flat-topped broad 1.M1
crested weir
B. Immediately below a sluice 2. M2
gate on a level apron
C. Behind the weir on a 3. S1
alluvial river
D. In a chute spillway 4. S2
5. H2
6. H3
Codes:
Lists - I Lists -II
A. On a flat-topped broad 1.M1
crested weir
B. Immediately below a sluice 2. M2
gate on a level apron
C. Behind the weir on a 3. S1
alluvial river
D. In a chute spillway 4. S2
5. H2
6. H3
Codes:
View Solution
Q4
Which of the following waste disposal tasks are achieved by a septic tank with its dispersion trench?
1. Aerobic sludge digestion
2. Settling and anaerobic sludge digestion
3. Anaerobic sewage stabilization
4. Bio-oxidation of effluent
Select the correct answer using the codes given below:
1. Aerobic sludge digestion
2. Settling and anaerobic sludge digestion
3. Anaerobic sewage stabilization
4. Bio-oxidation of effluent
Select the correct answer using the codes given below:
View Solution
Q5
Q16. Recently a Parliamentary Standing Committee presented a report on the “E-Waste and E-Radiation”. Which of the following substances constitute as E-waste?
1. Lead
2. Cadmium
3. Polybrominated biphenyls (PBB)
4. graphite
Select the correct answer using the codes given.
View Solution