CHAPTER 17 Flashcards
(27 cards)
Large facilities will have a lab on site to carry out the water testing by conducting all of the following tests except:
Select one:
A.
pH (acidity/alkalinity) value
B.
Odour levels
C.
Dye penetrant
D.
Turbidity (clarity)
E.
Total dissolved solids (TDS)
C.
Dye penetrant
Filters are frequently used in conjunction with _____ in which case most of the suspended impurities are removed.
Select one:
A.
Hot lime softeners
B.
Sodium zeolite softeners
C.
Settling tanks
D.
Deaerators
E.
Demineralizers
C.
Settling tanks
A plunger pump is a _____ pump.
Select one:
A.
Vane
B.
Centrifugal
C.
Gear
D.
Lobe
E.
Reciprocating
E.
Reciprocating
Shot feeding involves the injection of boiler water treatment chemicals over a:
Select one:
A.
Relatively long period of time
B.
Twenty-four hour period
C.
Twelve hour period
D.
Relatively short period of time
E.
Eight hour period
D.
Relatively short period of time
With zeolite filters it is easy to flush much zeolite down the drain during the _____ cycle.
Select one:
A.
Regeneration
B.
Backwash
C.
Injection
D.
Service
E.
Rinse
B.
Backwash
The adverse conditions that can occur within the boiler are caused by all of the following except:
Select one:
A.
Suspended gases
B.
Dissolved solids
C.
Suspended solids
D.
Dissolved gases
E.
Organics
C.
Suspended solids
The amount of chemicals fed to a boiler is dependent upon the:
Select one:
A.
Age of the boiler
B.
Amount of make-up required during the next 24 hours
C.
Size of the boiler
D.
Type of boiler
E.
Amount of water in the boiler
B.
Amount of make-up required during the next 24 hours
Temporary hardness in water is caused by:
Select one:
A.
Calcium and magnesium sulphates
B.
Calcium and/or magnesium bicarbonates
C.
Suspended solids
D.
Sodium chloride and/or hydroxide
E.
Sulphates and bicarbonates
B.
Calcium and/or magnesium bicarbonates
The modes of operation of the sodium zeolite water softener include all of the following except:
Select one:
A.
Injection
B.
Backwash
C.
Exchange
D.
Flush
E.
Rinse
D.
Flush
The regenerant most often used for regenerating a sodium zeolite softener is:
Select one:
A.
Sodium hydroxide
B.
Hydrogen chloride
C.
Sulphuric acid
D.
Sodium chloride
E.
Calcium sulphate
D.
Sodium chloride
The boiler blowdown procedure may be done about _____ times per day, each time for about 15 seconds, depending on the demand.
Select one:
A.
Five
B.
Two
C.
Three
D.
Four
E.
One
C.
Three
Calcium bicarbonate in the boiler feedwater produces:
Select one:
A.
Temporary hardness and permanent hardness
B.
Temporary hardness, very low solubility
C.
Permanent hardness, very high solubility
D.
Permanent hardness, very low solubility
E.
Temporary hardness, very high solubility
B.
Temporary hardness, very low solubility
Common methods of removing suspended solids from boiler make-up water are:
Select one:
A.
Softeners and settling tanks
B.
Coagulators and softeners
C.
Deaerators and scrubbers
D.
Evaporators and screens
E.
Settling tanks and filters
E.
Settling tanks and filters
In order to prevent the contamination of a potable water supply the method of providing a physical separation between the free flowing discharge end of a potable water pipe and an open or non-pressure receiving vessel is the:
Select one:
A.
Reduced pressure principal device
B.
Air gap
C.
Atmospheric vacuum breaker
D.
Double check valve
E.
Pressure vacuum breaker
B.
Air gap
Large facilities will have a lab on site to carry out the water testing by conducting all of the following tests except:
Select one:
A.
Bacteriological
B.
Combined chlorine
C.
Colour comparison
D.
Free chlorine
E.
Taste
E.
Taste
The four conditions that can occur within the boiler include all of the following except:
Select one:
A.
Scale
B.
Erosion
C.
Corrosion
D.
Mud
E.
Foaming
B.
Erosion
The “radical” in the boiler feedwater that indicates “permanent hardness” is the:
Select one:
A.
Sulphate
B.
Zeolite
C.
Bicarbonate
D.
Polymer
E.
Resin
A.
Sulphate
Material trapped in the bed of a pressure filter is removed by:
Select one:
A.
Heating the bed
B.
Regenerating the bed with a regenerant
C.
Backwashing the filter
D.
Replacing the bed with new material
E.
Passing chemicals through the exhausted bed
C.
Backwashing the filter
Magnesium bicarbonate in the boiler feedwater produces:
Select one:
A.
Temporary hardness and permanent hardness
B.
Temporary hardness, very low solubility
C.
Permanent hardness, very high solubility
D.
Temporary hardness, very high solubility
E.
Permanent hardness, very low solubility
B.
Temporary hardness, very low solubility
A sodium zeolite water softener causes:
Select one:
A.
Brine to become insoluble
B.
The solubility of a dissolved solid impurity to be lowered
C.
Dissolved solids, as compounds, to be removed
D.
Elements, associated with a radical, to be removed and replaced with elemental sodium
E.
The solubility of the zeolite impurity to be lowered
D.
Elements, associated with a radical, to be removed and replaced with elemental sodium
The backwash cycle of a, sodium zeolite softener regeneration will:
Select one:
A.
Flush out excess zeolite
B.
Flush out excess regenerant
C.
Loosen or separate and flush the bed of trapped suspended matter
D.
Allow the regenerant to exchange with the “elemental” impurity
E.
Follow the rinse cycle of the regeneration
C.
Loosen or separate and flush the bed of trapped suspended matter
Calcium sulphate in the boiler feedwater produces:
Select one:
A.
Temporary hardness, low solubility
B.
Temporary hardness, high solubility
C.
Permanent hardness, low solubility
D.
Temporary hardness and permanent hardness
E.
Permanent hardness, high solubility
C.
Permanent hardness, low solubility
The “radical” in the boiler feedwater that indicates “temporary hardness” is the:
Select one:
A.
Resin
B.
Polymer
C.
Sulphate
D.
Zeolite
E.
Bicarbonate
E.
Bicarbonate
The filtration method of water treatment will:
Select one:
A.
Remove dissolved gases
B.
Soften the water
C.
Act to remove suspended solids
D.
Act to remove suspended gases
E.
Remove suspended liquids
C.
Act to remove suspended solids
