Q. No.Given below are the results of three water samples subjected to BOD test:
I:
Sample A can be from secondary effluent discharged from an STP.
II:
Sample B can be from a river presumed to be mild to moderately polluted.
III:
Sample C can be from untreated sewage water.
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Match the following microorganism with product
| Column - I | Column - II | ||
| (a) | Clostridium butylicum | (i) | Cyclosporin A |
| (b) | Trichoderma polysporunt | (ii) | Butyric acid |
| (c) | Monascus purpureus | (iii) | Citric acid |
| (d) | Aspergillus niger | (iv) | Blood cholesterol lowering agent |
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (i) | (iv) | (iii) |
| 2. | (i) | (ii) | (iv) | (iii) |
| 3. | (iv) | (iii) | (ii) | (i) |
| 4. | (iii) | (iv) | (ii) | (i) |
Which of the following is put into anaerobic sludge digester for further sewage treatment?
| 1. | Floating debris | 2. | Effluents of primary treatment |
| 3. | Activated sludge | 4. | Primary sludge |
Which of the following serve as important biofertilizers in paddy fields?
1. Rhizobia
2. Frankia
3. Nitrobacter
4. Cynobacteria
Baculoviruses are excellent candidates for:
| 1. | Species-specific, narrow-spectrum insecticidal applications |
| 2. | Species-specific, broad-spectrum insecticidal applications |
| 3. | Biocontrol of fungal diseases |
| 4. | Biocontrol of aphids and mosquitoes |
Consider the given two statements:
| I. | Cattle dung can be used for the generation of biogas, commonly called gobar gas. |
| II. | The BOD test measures the rate of uptake of oxygen by microorganisms in a sample of water. |
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. Only II is correct
4. Both I and II are incorrect
In the anaerobic sludge digesters during sewage water treatment:
| 1. | The primary sludge is treated with aerobic microbes and activated sludge is created |
| 2. | The primary sludge is treated with anaerobic microbes and activated sludge is created |
| 3. | The activated sludge is digested by anaerobic microbes producing biogas during the process |
| 4. | The activated sludge is digested by aerobic microbes producing biogas during the process |
Consider the given two statements:
| I: | BOD is an indirect measure of the organic matter present in the water. |
| II: | The BOD test measures the rate of uptake of oxygen by microorganisms in a sample of water. |
| 1. | Both I and II are correct and II explains I. |
| 2. | Both I and II are correct but II does not explain I. |
| 3. | Only II is correct. |
| 4. | Both I and II are incorrect. |
Match each item in column I with one in Column II and select the correct answer from the codes given:
|
Column I |
|
Column II |
|
|
A |
Monascus purpureus |
P |
Thrombolytic |
|
B |
Trichoderma polysporum |
Q |
Immunosuppressant |
|
C |
Streptococcus pyogenes |
R |
Antibiotics |
|
D |
Streptomyces griseus |
S |
Statins |
Codes:
|
A |
B |
C |
D |
|
|
1 |
S |
Q |
R |
P |
|
2 |
Q |
S |
P |
R |
|
3 |
Q |
S |
R |
P |
|
4 |
S |
Q |
P |
R |
Fruit juices can be clarified with the use of:
| 1. | Lipases | 2. | Papain |
| 3. | Pectinase and protease | 4. | Glucoamylase |
© 2025 GoodEd Technologies Pvt. Ltd.