Q. Calculate the amount of resin required for the following information.

Cation Load: 100 ppm as CaCO₃
Capacity: 57 Kg/m³
Correction factor: 0.9
Flow rate: 135 m³/hr
Operation hours: 20 hrs

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Q. Calculate the SAC resin required for the following data. It should be noted that prior to the SAC, a WAC system is present.

M Alkalinity: 100 ppm as CaCO₃
P Alkalinity: 100 ppm as CaCO₃
EMA: 50 ppm as CaCO₃
Capacity: 57 Kg/m³
Correction factor: 0.9
Flow rate: 135 m³/hr
Operation hours: 20 hrs

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Q. The treatment system consists of a WAC, SAC which is followed by a WBA and SBA. Calculate the amount of WBA resin required for the following data.

M Alkalinity: 100 ppm as CaCO₃
P Alkalinity: 100 ppm as CaCO₃
EMA: 25 ppm as CaCO₃
Capacity: 37 Kg/m³
Correction factor: 0.9
Flow rate: 135 m³/hr
Operation hours: 20 hrs

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Q. The treatment system includes a WAC, SAC, followed by a WBA and SBA. There is no degasser in this system. Calculate the amount of resin required for the following information.

M Alkalinity: 100 ppm as CaCO₃
P Alkalinity: 100 ppm as CaCO₃
Silica: 45 ppm as CaCO₃
CO₂: 45 ppm as CaCO₃
Capacity: 37 Kg/m³
Correction factor: 0.9
Flow rate: 35 m³/hr
Operation hours: 10 hrs

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Q. The treatment system includes a WAC, SAC, followed by a WBA and SBA. There is a degasser in this system. Calculate the amount of SBA resin required for the following data.

M Alkalinity: 100 ppm as CaCO₃
P Alkalinity: 100 ppm as CaCO₃
Silica: 30 ppm as CaCO₃
CO₂: 45 ppm as CaCO₃
EMA: 100 ppm as CaCO₃
Capacity: 37 Kg/m³
Correction factor: 0.9
Flow rate: 35 m³/hr
Operation hours: 10 hrs

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Q. ________ is the removal of calcium, magnesium and certain other metal cations in hard water.

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Q. Soft water can foul plumbing.

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Q. ________ form insoluble salts.

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Q. Which of these methods does not remove hardness?

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Q. Ion exchange resins are ______

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Q. Ion exchange resins contain cation functional groups.

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Q. _____ is added to hard water to make it softer.

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Q. ________ is used in detergents to soften water.

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Q. Which is the commonly used chelator?

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Q. Calculate the amount of softener resin required for the following information.

Magnesium: 80 ppm as CaCO₃
Capacity: 47 Kg/m³
Correction factor: 0.9
Flow rate: 135 m³/hr
Operation hours: 20 hrs

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Q. Calculate the theoretical softener resin bed depth for the following data:

Magnesium Load: 130 ppm as CaCO₃
Capacity: 47 Kg/m³
Correction factor: 0.9
Flow rate: 135 m³/hr
Operation hours: 20 hrs
Linear velocity: 16.6 m³/h/ m³
Space velocity: 20 m³/h/ m³

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Q. Calculate the area of the softener vessel required for the following information.

Magnesium Load: 180 ppm as CaCO₃
Capacity: 47 Kg/m³
Correction factor: 0.9
Flow rate: 135 m³/hr
Operation hours: 20 hrs
Linear velocity: 16.6 m³/h/ m³
Space velocity: 20 m³/h/ m³

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Q. Calculate the diameter of the softener vessel required for the below given data.

Magnesium Load: 500 ppm as CaCO₃
Capacity: 57 Kg/m³
Correction factor: 0.9
Flow rate: 135 m³/hr
Operation hours: 20 hrs
Linear velocity: 16.6 m³/h/ m³
Space velocity: 20 m³/h/ m³

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Q. Calculate the fast rinse flow of the regenerant liquid for a softener with the below given data.

Magnesium Load: 10 ppm as CaCO₃
Capacity: 47 Kg/m³
Correction factor: 0.9
Flow rate: 135 m³/hr
Operation hours: 20 hrs

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Q. Calculate the regenerant flow required for the softener system with the given below data.

Calcium Load: 85 ppm as CaCO₃
Capacity: 37 Kg/m³
Correction factor: 0.9
Flow rate: 135 m³/hr
Operation hours: 20 hrs

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