- 1. 1. A water quality factor which largely regulates others is _________
A) Temperature
B) Photosynthesis
C) Respiration
D) Dissolved oxygen
- 2. 2. The process of utilization of the feed consumed for growth and maintenance is _________
A) Respiration
B) Ration
C) Decomposition
D) Eutrophication
- 3. 3. The major source of nitrogen in a fish pond is
A) Fish waste
B) Fish feed
C) Clay particles
D) Fertilizers
- 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) 2ppm
C) 70%
D) 20g/l
- 5. 5. One of these is not a buffering agent of alkaline source
A) Hydrogen ion
B) Carbonate ion
C) Hydroxyl ion
D) Bicarbonate 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) 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) Soya bean cake
B) Rice molass
C) Sugar cane bagass
D) Biological covers
- 9. 9. Actively moving aquatic organisms are called _______
A) Benthos
B) Necton
C) Detritus
D) Plankton
- 10. 10. One of these indicates an adequate amount of phytoplankton in a fish pond
A) 110% saturated total ammonia
B) A water transparency of 60cm
C) 3mlphytoplankton/ 100l of pond water
D) 20ppm hardness
- 11. 11. Which of these types of feeds is characteristic of an intensive fish culture?
A) Supplementary feed
B) Fish
C) Complete feed
D) Natural food
- 12. 12. A dry feed has _______ moisture
A) 15%
B) 30%
C) 50%
D) 10%
- 13. 13. Adoption of more feeding regime or frequency is necessary to _______
A) Encourage food wastage
B) Improve nutrient loss by leaching
C) Reduce dissolved oxygen consumption of fish
D) Discourage uniformity in fish size
- 14. 14. Sinking feed are fed to fish
A) Neither
B) At selected pond area
C) On entire pond area
D) Either
- 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) Avoiding soil erosion
B) Good water drainage
C) High water holding capacity
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) Detailed survey of site
C) Fencing of pond area
D) Nearness to market
- 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) 7.5cm-5cm
C) 5cm and 7.5cm
D) 5cm and 7.5-10cm
- 20. 20. Which part of the pond maintains the water volume?
A) Monk
B) Spillway
C) Ditch
D) Dam
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