- 1. 1. A water quality factor which largely regulates others is _________
A) Dissolved oxygen
B) Photosynthesis
C) Temperature
D) Respiration
- 2. 2. The process of utilization of the feed consumed for growth and maintenance is _________
A) Respiration
B) Decomposition
C) Ration
D) Eutrophication
- 3. 3. The major source of nitrogen in a fish pond is
A) Fish feed
B) Clay particles
C) Fertilizers
D) Fish waste
- 4. 4. A lethal value of dissolved oxygen that causes fish kills more than the fish mortality caused by other water quality factors combined is ________
A) 18F
B) 20g/l
C) 70%
D) 2ppm
- 5. 5. One of these is not a buffering agent of alkaline source
A) Hydrogen ion
B) Hydroxyl ion
C) Carbonate ion
D) Bicarbonate ion
- 6. 6. A major challenge in raising fish using the recirculatory system is ______
A) Lethal increase in pH
B) Build up of carbondioxied
C) Need of buffering system
D) Absence of photosynthesis
- 7. 7. Which two fish water qualities analysis would be done by an expert who may not afford the cost of testing for all the water quality parameters?
A) Turbidity and pH
B) Photosynthesis and respiration
C) Alkalinity and hardness
D) Temperature and dissolved oxygen
- 8. 8. Which of these is a natural food for fish?
A) Rice molass
B) Biological covers
C) Soya bean cake
D) Sugar cane bagass
- 9. 9. Actively moving aquatic organisms are called _______
A) Necton
B) Benthos
C) Detritus
D) Plankton
- 10. 10. One of these indicates an adequate amount of phytoplankton in a fish pond
A) 3mlphytoplankton/ 100l of pond water
B) 20ppm hardness
C) A water transparency of 60cm
D) 110% saturated total ammonia
- 11. 11. Which of these types of feeds is characteristic of an intensive fish culture?
A) Fish
B) Complete feed
C) Natural food
D) Supplementary feed
- 12. 12. A dry feed has _______ moisture
A) 50%
B) 30%
C) 10%
D) 15%
- 13. 13. Adoption of more feeding regime or frequency is necessary to _______
A) Encourage food wastage
B) Reduce dissolved oxygen consumption of fish
C) Discourage uniformity in fish size
D) Improve nutrient loss by leaching
- 14. 14. Sinking feed are fed to fish
A) Neither
B) At selected pond area
C) Either
D) On entire pond area
- 15. 15. What is the ratio of cement, sand and gravel for construction of a concrete pond?
A) 25%
B) 1:2:4
C) 0.5 difference
D) 1:2:1
- 16. 16. The best soil for construction of an earthen pond has _______ amount of clay
A) 25%
B) 50%
C) 70%
D) 4%
- 17. 17. One importance of the dike of an excavated pond is
A) High water holding capacity
B) Disallowing run off into the fish pond
C) Good water drainage
D) Avoiding soil erosion
- 18. 18. A factor that ensures immediate sale of fish as soon as it attains the table/market size is _______
A) Detailed survey of site
B) Fast growing species
C) Nearness to market
D) Fencing of pond area
- 19. 19. The required thickness of the floor and the wall plasters for a concrete pond are _____ and _______ respectively
A) 7.5-10cm and 5cm
B) 5cm and 7.5cm
C) 5cm and 7.5-10cm
D) 7.5cm-5cm
- 20. 20. Which part of the pond maintains the water volume?
A) Spillway
B) Dam
C) Monk
D) Ditch
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