Power Engineering 4B Book 6 Water Treatment Questions
With Complete Solutions
A boiler has an M-alkalinity that is greater than the prescribed
control range. What is the appropriate operator response?
Select one:
a. Reduce the frequency of bottom blowoff.
b. Lower the boiler water level.
c. Increase the rate of continuous blowdown.
d. Increase the rate of sodium hydroxide feed. Correct Answers
c
A boiler has an M-alkalinity that is greater than the prescribed
control range. What is the appropriate operator response?
Select one:
a. Reduce the frequency of bottom blowoff.
b. Lower the boiler water level.
c. Increase the rate of continuous blowdown.
d. Increase the rate of sodium hydroxide feed. Correct Answers
c
A treatment method that is often used in conjunction with
settling tanks is:
Select one:
a. Filtration
b. Lime soda softening
c. De-mineralizing
d. Zeolite softening Correct Answers a
A water sample taken from the service outlet of an ion-exchange
softener shows 20 ppm hardness. The operator should:
,Select one:
a. Regenerate the softener.
b. Add salt to the brine tank.
c. Backwash the softener.
d. Rinse the softener. Correct Answers a
An acceptable pH value for boiler water is:
Select one:
a. 8.35
b. 10.5
c. 6.95
d. 7 Correct Answers b
Bicarbonates can be removed from boiler feedwater by:
Select one:
a. Blowing off the boiler
b. Heating the water to just below its boiling point
c. Filter tanks
d. A strainer in the feedwater line Correct Answers b
Biological fouling in recirculating cooling water towers is
caused by algae, _____ and bacteria growth.
Select one:
a. Fungi
b. Fauna
c. Micro-organisms
d. Flora Correct Answers a
Boiler water is treated in order to:
Select one:
a. prevent scale deposition and waterside corrosion
, b. remove suspended matter
c. reduce the environmental impact of the blowoff effluent
d. prevent the water from becoming too alkaline Correct
Answers a
Boiler water that is too alkaline will likely
a) produce scale inside the boiler
b) have a low pH
c) cause foaming in the boiler
d) cause grooving on a boilers waterside surfaces Correct
Answers c
Boiler water with a pH of 6 is considered:
Select one:
a. Neutral
b. Acidic
c. Basic
d. Alkaline Correct Answers b
By definition, alum, when added to water to form floc in a
clarifying system, is known
a) curdler
b) congelant
c) coagulant
d) flocculant Correct Answers d
Carbon dioxide may cause corrosion in condensate return lines.
This corrosive carbon dioxide may originate:
Select one:
a. In condensate neutralizing amines
With Complete Solutions
A boiler has an M-alkalinity that is greater than the prescribed
control range. What is the appropriate operator response?
Select one:
a. Reduce the frequency of bottom blowoff.
b. Lower the boiler water level.
c. Increase the rate of continuous blowdown.
d. Increase the rate of sodium hydroxide feed. Correct Answers
c
A boiler has an M-alkalinity that is greater than the prescribed
control range. What is the appropriate operator response?
Select one:
a. Reduce the frequency of bottom blowoff.
b. Lower the boiler water level.
c. Increase the rate of continuous blowdown.
d. Increase the rate of sodium hydroxide feed. Correct Answers
c
A treatment method that is often used in conjunction with
settling tanks is:
Select one:
a. Filtration
b. Lime soda softening
c. De-mineralizing
d. Zeolite softening Correct Answers a
A water sample taken from the service outlet of an ion-exchange
softener shows 20 ppm hardness. The operator should:
,Select one:
a. Regenerate the softener.
b. Add salt to the brine tank.
c. Backwash the softener.
d. Rinse the softener. Correct Answers a
An acceptable pH value for boiler water is:
Select one:
a. 8.35
b. 10.5
c. 6.95
d. 7 Correct Answers b
Bicarbonates can be removed from boiler feedwater by:
Select one:
a. Blowing off the boiler
b. Heating the water to just below its boiling point
c. Filter tanks
d. A strainer in the feedwater line Correct Answers b
Biological fouling in recirculating cooling water towers is
caused by algae, _____ and bacteria growth.
Select one:
a. Fungi
b. Fauna
c. Micro-organisms
d. Flora Correct Answers a
Boiler water is treated in order to:
Select one:
a. prevent scale deposition and waterside corrosion
, b. remove suspended matter
c. reduce the environmental impact of the blowoff effluent
d. prevent the water from becoming too alkaline Correct
Answers a
Boiler water that is too alkaline will likely
a) produce scale inside the boiler
b) have a low pH
c) cause foaming in the boiler
d) cause grooving on a boilers waterside surfaces Correct
Answers c
Boiler water with a pH of 6 is considered:
Select one:
a. Neutral
b. Acidic
c. Basic
d. Alkaline Correct Answers b
By definition, alum, when added to water to form floc in a
clarifying system, is known
a) curdler
b) congelant
c) coagulant
d) flocculant Correct Answers d
Carbon dioxide may cause corrosion in condensate return lines.
This corrosive carbon dioxide may originate:
Select one:
a. In condensate neutralizing amines
