I-Multiple Choice

_____1. How to remedy a tank with low dissolve oxygen?
A. Start the blower
B. Start the water pump
C. Start the puddle wheel
D. Start the electric fan beside the tank

_____2. What factor usually determines the depth of fish cages?
A. The mooring system
B. Capability of the owner
C. Natural productivity of the water
D. The species of fish to be cultivated

_____3. In order to make the fish cage floats on the water, the cage must be equipped with _____.
A. floatation system
B. framework
C. mooring system
D. netting system

_____4. As a general rule, what is the length of the mooring lines?
A. Two times of the depth of the water
B. Three times of the length of the cage
C. Three times of the depth of the water
D. Two meters allowance during high tide

_____5. Which of the following keeps the whole cage in a certain location and prevents the cage from drifting along the water current?
A. Barrier
B. Floater
C. Framework
D. Mooring

Please answer it correctly. Because I need the answer now. If you don't know the answer just don't answer.
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