Power Engineering - 4B6 Practice Questions With Complete
Solutions
A boiler has an M-alkalinity that is greater than the prescribed
control range. What is the appropriate operator response?
a. Lower the boiler water level.
b. Increase the rate of continuous blowdown.
c. Reduce the frequency of bottom blowoff.
d. Increase the rate of sodium hydroxide feed. Correct Answers
b. Increase the rate of continuous blowdown.
A conductivity meter is used to measure the:
a. Alkalinity
b. Electrolyte
c. Hardness
d. Total Dissolved Solids Correct Answers d. Total Dissolved
Solids
A disadvantage of using glycol in heating or cooling systems
instead of water is that
a. all glycols are toxic
b. glycol has lower viscosity, so that fluid velocities increase.
c. glycol has a higher specific heat, so the systems run hotter
d. more powerful pumps are required Correct Answers d. more
powerful pumps are required
A treatment method that is often used in conjunction with
settling tanks is:
,a. Zeolite softening
b. De-mineralizing
c. Lime soda softening
d. Filtration Correct Answers d. Filtration
A water sample taken from the service outlet of an ion-exchange
softener shows 20 ppm hardness. The operator should:
a. Regenerate the softener.
b. Rinse the softener.
c. Backwash the softener.
d. Add salt to the brine tank. Correct Answers a. Regenerate the
softener.
An acceptable pH value for boiler water is:
a. 7.00
b. 6.95
c. 8.35
d. 10.50 Correct Answers d. 10.50
Bicarbonates can be removed from boiler feedwater by:
a. Filter tanks
b. A strainer in the feedwater line
c. Heating the water to just below its boiling point
d. Blowing off the boiler Correct Answers c. Heating the water
to just below its boiling point
, Biological fouling in recirculating cooling water towers is
caused by algae, _____ and bacteria growth.
a. Flora
b. Micro-organisms
c. Fauna
d. Fungi Correct Answers d. Fungi
Boiler water is treated in order to:
a. prevent the water from becoming too alkaline
b. reduce the environmental impact of the blowoff effluent
c. remove suspended matter
d. prevent scale deposition and waterside corrosion Correct
Answers d. prevent scale deposition and waterside corrosion
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 boiler's waterside surfaces Correct
Answers c. Cause foaming in the boiler
Boiler water with a pH of 6 is considered:
a. Alkaline
b. Basic
c. Acidic
d. Neutral Correct Answers c. Acidic
Solutions
A boiler has an M-alkalinity that is greater than the prescribed
control range. What is the appropriate operator response?
a. Lower the boiler water level.
b. Increase the rate of continuous blowdown.
c. Reduce the frequency of bottom blowoff.
d. Increase the rate of sodium hydroxide feed. Correct Answers
b. Increase the rate of continuous blowdown.
A conductivity meter is used to measure the:
a. Alkalinity
b. Electrolyte
c. Hardness
d. Total Dissolved Solids Correct Answers d. Total Dissolved
Solids
A disadvantage of using glycol in heating or cooling systems
instead of water is that
a. all glycols are toxic
b. glycol has lower viscosity, so that fluid velocities increase.
c. glycol has a higher specific heat, so the systems run hotter
d. more powerful pumps are required Correct Answers d. more
powerful pumps are required
A treatment method that is often used in conjunction with
settling tanks is:
,a. Zeolite softening
b. De-mineralizing
c. Lime soda softening
d. Filtration Correct Answers d. Filtration
A water sample taken from the service outlet of an ion-exchange
softener shows 20 ppm hardness. The operator should:
a. Regenerate the softener.
b. Rinse the softener.
c. Backwash the softener.
d. Add salt to the brine tank. Correct Answers a. Regenerate the
softener.
An acceptable pH value for boiler water is:
a. 7.00
b. 6.95
c. 8.35
d. 10.50 Correct Answers d. 10.50
Bicarbonates can be removed from boiler feedwater by:
a. Filter tanks
b. A strainer in the feedwater line
c. Heating the water to just below its boiling point
d. Blowing off the boiler Correct Answers c. Heating the water
to just below its boiling point
, Biological fouling in recirculating cooling water towers is
caused by algae, _____ and bacteria growth.
a. Flora
b. Micro-organisms
c. Fauna
d. Fungi Correct Answers d. Fungi
Boiler water is treated in order to:
a. prevent the water from becoming too alkaline
b. reduce the environmental impact of the blowoff effluent
c. remove suspended matter
d. prevent scale deposition and waterside corrosion Correct
Answers d. prevent scale deposition and waterside corrosion
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 boiler's waterside surfaces Correct
Answers c. Cause foaming in the boiler
Boiler water with a pH of 6 is considered:
a. Alkaline
b. Basic
c. Acidic
d. Neutral Correct Answers c. Acidic
