Power Engineering - 4B6 Practice Questions and Answers Rated A
Chillers must have to protect the evapo-
rator coil from freezing damage.
a. anti-freeze c. freeze stats
b. frost plugs
c. freeze stats
d. heaters
Sodium zeolite softeners:
a. Remove all dissolved solids and suspended matter from
the water b. Remove calcium and magnesium ions from the water
b. Remove calcium and magnesium ions from the water
c. Are regenerated with an acid solution
d. Remove all dissolved solids from the water
Which of the following is NOT a cause of, or a factor in,
closed loop system corrosion?
a. caustic gouging a. caustic gouging
b. galvanic action
c. low pH
d. dissolved oxygen
Materials which are generally larger than 2 micrometres
and that are dispersed throughout the water, are called:
a. Dissolved solids c. Suspended matter
b. Colloidal particles
c. Suspended matter
d. Dissolved matter
Sludge is usually removed from a boiler by:
c. Blowing ott through the bottom blowott connection
a. Filtering the water before it leaves the boiler
, Power Engineering - 4B6 Practice Questions and Answers Rated A
b. Vacuuming it from the bottom
c. Blowing ott through the bottom blowott connection
d. Blowing down through the continuous blowdown
Total boiler water alkalinity is a measurement of dis-
solved:
a. Carbonates, sulfates, and bicarbonates d. Hydroxides, carbonates, and bicarbonates
b. Bicarbonates and chelants
c. Hydroxides, bicarbonates, and carbon dioxide
d. Hydroxides, carbonates, and bicarbonates
What checks should be done yearly on heating or cooling
systems that contain glycol?
a. check toxicity and specific heat b. check for freeze point and inhibitor strength
b. check for freeze point and inhibitor strength
c. check for increasing pH and dissolved carbon dioxide
d. check for viscosity and pour point
The "total" or "methyl" alkalinity test indicates the
alkalinity that is due to:
a. Dissolved carbon dioxide d. All forms of alkalinity
b. Sodium Bicarbonate ions
c. Hydroxide alkalinity
d. All forms of alkalinity
In a zeolite water softener, the scale-forming salts are:
a. Completely removed
b. Changed into non-scale forming sodium salts
b. Changed into non-scale forming sodium salts
c. Filtered out
d. Absorbed by the zeolite
, Power Engineering - 4B6 Practice Questions and Answers Rated A
The principal cause of steel corrosion in cooling towers is:
a. Dissolved carbon dioxide
c. Dissolved oxygen
b. High pH
c. Dissolved oxygen
d. Low pH
The dissolved solids in raw water:
a. Cause pitting of boiler surfaces
d. Are usually removed by ion exchange
b. Cause grooving of piping surfaces
c. Are organic matter
d. Are usually removed by ion exchange
Boiler water with a pH of 6 is considered:
a. Alkaline
c. Acidic
b. Basic
c. Acidic
d. Neutral
Sodium sulfite:
a. Prevents the corrosion caused by oxygen in boiler wa-
ter a. Prevents the corrosion caused by oxygen in boiler water
b. Precipitates calcium and magnesium compounds
c. Prevents scale adhering to the tubes
d. Controls foaming
Phenolphthalein is
a. an indicator
a. an indicator
b. a reagent
c. a butter
d. a neutralizing agent
Chillers must have to protect the evapo-
rator coil from freezing damage.
a. anti-freeze c. freeze stats
b. frost plugs
c. freeze stats
d. heaters
Sodium zeolite softeners:
a. Remove all dissolved solids and suspended matter from
the water b. Remove calcium and magnesium ions from the water
b. Remove calcium and magnesium ions from the water
c. Are regenerated with an acid solution
d. Remove all dissolved solids from the water
Which of the following is NOT a cause of, or a factor in,
closed loop system corrosion?
a. caustic gouging a. caustic gouging
b. galvanic action
c. low pH
d. dissolved oxygen
Materials which are generally larger than 2 micrometres
and that are dispersed throughout the water, are called:
a. Dissolved solids c. Suspended matter
b. Colloidal particles
c. Suspended matter
d. Dissolved matter
Sludge is usually removed from a boiler by:
c. Blowing ott through the bottom blowott connection
a. Filtering the water before it leaves the boiler
, Power Engineering - 4B6 Practice Questions and Answers Rated A
b. Vacuuming it from the bottom
c. Blowing ott through the bottom blowott connection
d. Blowing down through the continuous blowdown
Total boiler water alkalinity is a measurement of dis-
solved:
a. Carbonates, sulfates, and bicarbonates d. Hydroxides, carbonates, and bicarbonates
b. Bicarbonates and chelants
c. Hydroxides, bicarbonates, and carbon dioxide
d. Hydroxides, carbonates, and bicarbonates
What checks should be done yearly on heating or cooling
systems that contain glycol?
a. check toxicity and specific heat b. check for freeze point and inhibitor strength
b. check for freeze point and inhibitor strength
c. check for increasing pH and dissolved carbon dioxide
d. check for viscosity and pour point
The "total" or "methyl" alkalinity test indicates the
alkalinity that is due to:
a. Dissolved carbon dioxide d. All forms of alkalinity
b. Sodium Bicarbonate ions
c. Hydroxide alkalinity
d. All forms of alkalinity
In a zeolite water softener, the scale-forming salts are:
a. Completely removed
b. Changed into non-scale forming sodium salts
b. Changed into non-scale forming sodium salts
c. Filtered out
d. Absorbed by the zeolite
, Power Engineering - 4B6 Practice Questions and Answers Rated A
The principal cause of steel corrosion in cooling towers is:
a. Dissolved carbon dioxide
c. Dissolved oxygen
b. High pH
c. Dissolved oxygen
d. Low pH
The dissolved solids in raw water:
a. Cause pitting of boiler surfaces
d. Are usually removed by ion exchange
b. Cause grooving of piping surfaces
c. Are organic matter
d. Are usually removed by ion exchange
Boiler water with a pH of 6 is considered:
a. Alkaline
c. Acidic
b. Basic
c. Acidic
d. Neutral
Sodium sulfite:
a. Prevents the corrosion caused by oxygen in boiler wa-
ter a. Prevents the corrosion caused by oxygen in boiler water
b. Precipitates calcium and magnesium compounds
c. Prevents scale adhering to the tubes
d. Controls foaming
Phenolphthalein is
a. an indicator
a. an indicator
b. a reagent
c. a butter
d. a neutralizing agent
