Demineralizer anion exchanger takes acid containing water and exchanges it with?

Demineralizer anion exchanger takes acid containing water and exchanges it with?

A. Sodium ions
B. Hydroxide ions
C. Magnesium ions
D. Hydrogen ions
E. Sulphur ions

Answer: B

Demineralizer salts in the cation exchanger are converted into __ and __.

Demineralizer salts in the cation exchanger are converted into __ and __.

A. Sulphuric, hyrdochloric, carbon dioxide, water
B. Magnesium, calcium, carbon dioxide, water
C. Sulphuric, hydrochloric, water
D. Magnesium, calcium, water
E. Sulphuric, hydochloric, carbon dioxide

Answer: A

Demineralizer cation exchanger removes calcium, magnesium and __ cations.

Demineralizer cation exchanger removes calcium, magnesium and __ cations.

A. Sodium
B. Hydrogen
C. Sulphur
D. Hydrochloric
E. Iron

Answer: A

Demineralizers cation exchanger takes water containing salts and exchanges it with?

Demineralizers cation exchanger takes water containing salts and exchanges it with?

A. Sodium ions
B. Hydroxide ions
C. Magnesium ions
D. Hydrogen ions
E. Sulphur ions

Answer: D

Sodium chloride is also known as?

Sodium chloride is also known as?

A. Polyethylene
B. Dacron
C. Brine
D. Porous
E. Anthracite

Answer: C

When the zeolite material has given up all its Na cations, regeneration is done by filling it with a ___ solution.

When the zeolite material has given up all its Na cations, regeneration is done by filling it with a ___ solution.

A. Sodium carbonate
B. Sodium anions
C. Sodium cations
D. Sodium bicarbonate
E. Sodium chloride

Answer: E

The zeolite is charged with a large amount of ?

The zeolite is charged with a large amount of ?

A. Sodium carbonate
B. Sodium anions
C. Sodium cations
D. Sodium bicarbonate
E. Sodium sulphate

Answer: C

Lime-Soda Softeners use ___ to add to the water causing the scale-forming dissolved solids:

Lime-Soda Softeners use ___ to add to the water causing the scale-forming dissolved solids:

A. Calcium hydroxide
B. Sodium chloride
C. Sodium carbonate
D. All of the above
E. A and C

Answer: E

In a cartridge filter, when the pressure drop between the inlet and outlet reaches a specified maximum valve, the cartridge must be?

In a cartridge filter, when the pressure drop between the inlet and outlet reaches a specified maximum valve, the cartridge must be?

A. Backwashed
B. Reparied
C. Replaced
D. Pressure going in must be closed to reduce the pressure drop
E. Pressure going out must be closed to reduce the pressure drop

Answer: C

In a tubular filter-aid filter, when the filter starts to clog and requires backwashing, inlet and outlet valves are __ and the drain valve is __.

In a tubular filter-aid filter, when the filter starts to clog and requires backwashing, inlet and outlet valves are __ and the drain valve is __.

A. Open, open
B. Open, closed
C. Closed, closed
D. Closed, open

Answer: D

In a tubular filter-aid filter, cylindrical tubes are covered by socks made of __ filter cloth?

In a tubular filter-aid filter, cylindrical tubes are covered by socks made of __ filter cloth?

A. Dacron
B. Porous
C. Anthracite
D. Polyethylene
E. A and D

Answer: E

In a pressure filter, any suspended matter in the water will be trapped by ___ material?

In a pressure filter, any suspended matter in the water will be trapped by ___ material?

A. Sand
B. Anthracite
C. Calcite
D. Porous
E. Gravel

Answer: D

Dissolved solids cannot be removed by?

Dissolved solids cannot be removed by?

A. Lime-soda softener
B. Filters
C. Sodium zeolite softener
D. Settling tanks
E. B and D

Answer: E

Bicarbonates and sulphates are undesirable because they will cause?

Bicarbonates and sulphates are undesirable because they will cause?

A. Overheating of boiler tubes
B. Foaming
C. Sludge on boiler surfaces
D. Corrosion of boiler metal
E. Carryover of impurities

Answer: A

If sulphates of calcium and magnesium are not removed, they will cause?

If sulphates of calcium and magnesium are not removed, they will cause?

A. Foaming
B. Soft scale
C. Hard scale
D. All of the above
E. A and C

Answer: C

If bicarbonates are not removed before the water enters the boiler, they will cause?

If bicarbonates are not removed before the water enters the boiler, they will cause?

A. Foaming
B. Soft scale
C. Hard scale
D. All of the above
E. A and C

Answer: B

Coagulants added to water

Coagulants added to water

a) make the water soft
b) will remove fine particles more readily
c) remove the dissolved solids
d) causes the fine particles to float to the surface
e) remove chemicals not used up

Answer: B

Filters are used

Filters are used

a) for external water treatment
b) to remove dissolved solids
c) to remove calcium bicarbonates
d) for internal treatment
e) to remove hardness

Answer: A

The capacity of a sodium zeolite softener will drop due to zeolite attrition at about

The capacity of a sodium zeolite softener will drop due to zeolite attrition at about

a) 5% per year
b) 3% per year
c) 15% per year
d) 1% per year
e) 7% per year

Answer: B

Zeolite of a sodium zeolite softener may be discharged to the sewer during the

Zeolite of a sodium zeolite softener may be discharged to the sewer during the

a) injection stage of a regeneration
b) service stage
c) slow rinse stage of a regeneration
d) fast rinse stage of a regeneration
e) backwash stage of a regeneration

Answer: E