KUIZ RAWATAN KUALITI AIR DALAM AKUAKULTUR

Apakah tujuan menambah larutan alkali ke dalam air?

• Untuk meningkatkan suhu air

• Untuk mengurangkan kejernihan air

• Untuk memperbaiki tahap pH

• Untuk menambah nutrien ke dalam air

Answer explanation

Adding alkaline solutions to water is primarily done to improve the pH level, making the water less acidic. This is important for various applications, including agriculture and aquaculture, where optimal pH is crucial.

Apakah bahan yang sering digunakan untuk meningkatkan pH air?

• Asid asetat

• Sodium bikarbonat

• Ammonium klorida

• Asid nitrat

Answer explanation

Sulfuric acid is commonly used to lower the pH of water because it is a strong acid that effectively increases the concentration of hydrogen ions, thus reducing the pH. The other options are alkaline substances that raise pH.

Apakah kaedah yang disyorkan untuk mencegah pengurangan DO pada waktu malam?

• Kurangkan pendedahan cahaya

• Pasang pengudaraan

• Tambah lebih banyak ikan

• Naikkan suhu air

Answer explanation

Installing aeration is effective in preventing dissolved oxygen (DO) depletion at night, as it increases oxygen exchange in the water, ensuring fish and other aquatic life have sufficient oxygen to thrive.

Apakah tahap ammonia yang selamat dalam air?

• 1 ppm

• 0 ppm

• 0.5 ppm

• 2 ppm

Answer explanation

The safe level of ammonia in water is 0 ppm, as any detectable amount can be harmful to aquatic life and human health. Therefore, the correct answer is 0 ppm.

Apakah kesan penggunaan natrium karbonat dalam rawatan air?

• Ia menambah klorin

• Ia mengurangkan suhu air

• Ia meningkatkan tahap pH

• Ia meningkatkan kekerasan air

Answer explanation

Sodium carbonate, when added to water, increases the pH level, making the water less acidic. This is important for various water treatment processes, as higher pH can improve the effectiveness of certain treatments.

Apakah kaedah biasa untuk merawat kekeruhan tinggi dalam air?

• Menambah garam

• Menambah gula

• Menukar air

• Menggunakan cahaya UV

Answer explanation

Changing the water is a common method to treat high turbidity, as it removes suspended particles and contaminants. Other options like adding salt or sugar do not effectively reduce turbidity, and UV light is more for disinfection.

Apakah kelebihan utama rawatan air UV?

• Ia menambah bahan kimia ke dalam air

• Ia sangat ekonomik

• Ia meningkatkan tekanan air

• Ia tidak memerlukan elektrik

Answer explanation

The main advantage of UV water treatment is that it is very economical. It effectively disinfects water without the need for chemicals, making it a cost-effective solution for water purification.

Apakah rawatan ozon terutamanya lakukan?

• Menghapuskan logam berat

• Meningkatkan suhu air

• Menambah nutrien ke dalam air

• Bertindak sebagai agen pengoksida yang kuat

Answer explanation

Ozone treatment primarily acts as a strong oxidizing agent, effectively breaking down pollutants and pathogens in water, making it a powerful method for water purification.

Apakah kelemahan menggunakan kapur dalam rawatan air?

• Ia memerlukan peralatan khas

• Ia boleh menyebabkan masalah kekerasan air

• Ia terlalu mahal

• Ia tidak berkesan

Answer explanation

Using lime in water treatment can lead to increased water hardness due to the calcium content. This can create issues for plumbing and appliances, making it a significant disadvantage compared to other treatment methods.

Apakah tujuan menggunakan cakera Secchi?

• Untuk menilai kejernihan air

• Untuk mengukur suhu air

• Untuk menguji tahap ammonia

• Untuk memeriksa tahap pH

Answer explanation

A Secchi disk is used to assess water clarity by measuring the depth at which the disk disappears from view. This helps determine the transparency of the water, which is crucial for understanding aquatic ecosystems.