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