Simulasi SAS Ganjil XI APAT 2025

SAS GANJIL 2025 (XI APAT)

Theme: Freshwater Aquaculture Business Process & Technological Innovation

CEFR Level: B1 | Total Items: 40

Petunjuk: Isi nama lengkap dan kelas Anda, kemudian jawab semua pertanyaan. Nilai kelulusan adalah 70 dari 100.

Nama Lengkap:

Kelas:

SECTION 1 – Multiple Choice (One Correct Answer)

Reading Passage 1 – Smart Freshwater Aquaculture System

A freshwater fish farm in West Java recently adopted an automated recirculating aquaculture system (RAS). The system monitors oxygen, temperature, and ammonia levels using sensors connected to a mobile application. Farmers receive real-time alerts so they can respond quickly to changes. After six months, the farm reported a 20% increase in survival rate and a 15% reduction in water usage.

1. What is the main benefit of using RAS in the farm?

A. It eliminates the need for human workers

B. It increases efficiency through real-time monitoring

C. It completely removes all water waste

D. It stops all fish diseases permanently

2. Why did the survival rate increase?

A. The fish were fed twice a day

B. Water quality was better controlled

C. The pond water was replaced daily

D. More fish were stocked

3. Which parameter is NOT mentioned as being monitored by the system?

A. Temperature

B. pH level

C. Ammonia

D. Oxygen

4. What does the system send to farmers?

A. Harvest schedules

B. Real-time alerts

C. Insurance information

D. Daily profit reports

Reading Passage 2 – Water Quality Issue in Tilapia Nursery

A tilapia nursery noticed that many fish fry were swimming near the surface and showing rapid gill movement. Water testing showed that DO dropped to 2 mg/L in the early morning. The technician increased aeration and reduced feeding.

5. What problem was happening in the nursery?

A. Over-aeration

B. Low oxygen level

C. High temperature

D. Strong current

6. Why did the technician reduce feeding?

A. To prevent overstocking

B. To lower oxygen demand

C. To increase ammonia levels

D. To let fish rest

7. At 2 mg/L DO, the fish likely experience...

A. Rapid growth

B. Stress and suffocation

C. Increased appetite

D. Normal activity

Reading Passage 3 – Feed Production Unit

In aquaculture, feed production is crucial. For larvae, natural feed such as plankton is recommended because it is easier to digest. As fish grow, they can be transitioned to pellets. Pellets are efficient because they have a longer shelf life and provide balanced nutrition.

8. Which feed is recommended for larvae?

A. Pellets

B. Frozen feed

C. Natural feed

D. Mixed vegetables

9. Why are pellets considered efficient?

A. They soak water quickly

B. They last longer in storage

C. They dissolve easily

D. They are more expensive

10. Natural feed is preferred for larvae because...

A. It is more colorful

B. It is easier to digest

C. It is more expensive

D. It is larger in size

Reading Passage 4 – Innovation in Disease Control

A fish farm introduced probiotics to control diseases. Probiotics are beneficial bacteria that compete with harmful bacteria, thus improving fish health. After using probiotics, the fish became more active and the farmer reduced the use of chemicals.

11. What is the purpose of using probiotics?

A. Increasing turbidity

B. Supporting beneficial microbes

C. Reducing temperature

D. Increasing chemical treatments

12. What change was observed in the fish?

A. They ate less

B. They were more active

C. They stopped swimming

D. They changed color

13. What did the farmer use less often?

A. Chemicals

B. Probiotics

C. Water

D. Pellets

Reading Passage 5 – Business Planning

Successful aquaculture business requires good planning. Collecting market data helps understand customer preferences and demand. Testing different packaging designs can make products more attractive to customers.

14. What is the purpose of collecting market data?

A. To increase temperature

B. To understand customer needs

C. To locate competitor ponds

D. To improve feeding schedule

15. Why does the team test different packaging designs?

A. To reduce appetite

B. To attract customers

C. To lower oxygen

D. To reduce labor

SECTION 2 – Multiple Choice (Multiple Answers)

16. Which activities help identify pond problems? (Choose 2)

A. Observing fish behavior

B. Ignoring water color

C. Checking water pH

D. Reducing aeration

17. Which indicators show good pond conditions? (Choose 2)

A. Stable pH

B. Fish floating on the surface

C. Clear water color

D. High ammonia

18. Factors that improve pellet quality include... (Choose 3)

A. Controlling moisture

B. Using coarse ingredients

C. Gas drying evenly

D. Ensuring even drying

E. Storing pellets wet

19. Which practices help prevent disease? (Choose 2)

A. Quarantine new fish

B. Sharing nets between ponds

C. Cleaning equipment

D. Overfeeding

20. Which practices support uniform growth? (Choose 2)

A. Regular grading

B. Overcrowding

C. Gentle water flow

D. Feeding once a week

21. Which parameters can sensors measure? (Choose 3)

A. pH

B. Oxygen

C. Temperature

D. Fish age

22. Good natural feed production requires... (Choose 2)

A. Clean culture water

B. Excessive fertilization

C. Controlled sunlight

D. Random feeding

23. Signs of poor water quality include... (Choose 3)

A. Bad smell

B. Clear water

C. Fish gasping

D. Sudden mortality

24. Good feeding management includes... (Choose 2)

A. Monitoring fish appetite

B. Feeding randomly

C. Adjusting feed based on size

D. Overfeeding

25. Factors that increase business profit include... (Choose 2)

A. Efficient technology

B. Product innovation

C. Ignoring market demand

D. Reducing quality

SECTION 3 – Drag & Drop

Seret dan jatuhkan istilah yang tepat ke tempat yang sesuai.

26. Dangerous waste from fish metabolism

ammonia

27. Young fish at early life stages

larvae

28. Machine used to make artificial feed

pellet mill

29. Beneficial bacteria that improve water

probiotics

30. Aeration increases the amount of

oxygen

SECTION 4 – True or False

31. Clean water and stable temperature support fry survival.

True

False

32. Overfeeding always improves growth.

True

False

33. Probiotics reduce harmful bacteria.

True

False

34. Natural feed is harder to digest than pellets for larvae.

True

False

35. High ammonia stresses or kills fish.

True

False

SECTION 5 – Matching

Istilah (Column A)	Pilihan (Column B)
36. Dissolved Oxygen	Pilih Jawaban A. Young fish B. Water acidity level C. Machine that increases oxygen D. Artificial feed E. Gas level needed for respiration
37. pH	Pilih Jawaban A. Young fish B. Water acidity level C. Machine that increases oxygen D. Artificial feed E. Gas level needed for respiration
38. Aerator	Pilih Jawaban A. Young fish B. Water acidity level C. Machine that increases oxygen D. Artificial feed E. Gas level needed for respiration
39. Larvae	Pilih Jawaban A. Young fish B. Water acidity level C. Machine that increases oxygen D. Artificial feed E. Gas level needed for respiration
40. Pellet	Pilih Jawaban A. Young fish B. Water acidity level C. Machine that increases oxygen D. Artificial feed E. Gas level needed for respiration

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