Power Engineering - 4B6 Practice
Exam Questions & Answers (Grade
A+)
Chillers must have _____________ to protect the evaporator coil
from freezing damage.
a. anti-freeze
b. frost plugs
c. freeze stats
d. heaters -
correct answer ✅c. freeze stats
Sodium zeolite softeners:
a. Remove all dissolved solids and suspended matter 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 -
correct answer ✅b. Remove calcium and magnesium ions from the
water
,Power Engineering - 4B6 Practice
Exam Questions & Answers (Grade
A+)
Which of the following is NOT a cause of, or a factor in, closed loop
system corrosion?
a. caustic gouging
b. galvanic action
c. low pH
d. dissolved oxygen -
correct answer ✅a. caustic gouging
Materials which are generally larger than 2 micrometres and that
are dispersed throughout the water, are called:
a. Dissolved solids
b. Colloidal particles
c. Suspended matter
d. Dissolved matter -
correct answer ✅c. Suspended matter
Sludge is usually removed from a boiler by:
,Power Engineering - 4B6 Practice
Exam Questions & Answers (Grade
A+)
a. Filtering the water before it leaves the boiler
b. Vacuuming it from the bottom
c. Blowing off through the bottom blowoff connection
d. Blowing down through the continuous blowdown -
correct answer ✅c. Blowing off through the bottom blowoff
connection
Total boiler water alkalinity is a measurement of dissolved:
a. Carbonates, sulfates, and bicarbonates
b. Bicarbonates and chelants
c. Hydroxides, bicarbonates, and carbon dioxide
d. Hydroxides, carbonates, and bicarbonates -
correct answer ✅d. Hydroxides, carbonates, and bicarbonates
What checks should be done yearly on heating or cooling systems
that contain glycol?
, Power Engineering - 4B6 Practice
Exam Questions & Answers (Grade
A+)
a. check toxicity and specific heat
b. check for freeze point and inhibitor strength
c. check for increasing pH and dissolved carbon dioxide
d. check for viscosity and pour point -
correct answer ✅b. check for freeze point and inhibitor strength
The "total" or "methyl" alkalinity test indicates the alkalinity that is
due to:
a. Dissolved carbon dioxide
b. Sodium Bicarbonate ions
c. Hydroxide alkalinity
d. All forms of alkalinity -
correct answer ✅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
Exam Questions & Answers (Grade
A+)
Chillers must have _____________ to protect the evaporator coil
from freezing damage.
a. anti-freeze
b. frost plugs
c. freeze stats
d. heaters -
correct answer ✅c. freeze stats
Sodium zeolite softeners:
a. Remove all dissolved solids and suspended matter 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 -
correct answer ✅b. Remove calcium and magnesium ions from the
water
,Power Engineering - 4B6 Practice
Exam Questions & Answers (Grade
A+)
Which of the following is NOT a cause of, or a factor in, closed loop
system corrosion?
a. caustic gouging
b. galvanic action
c. low pH
d. dissolved oxygen -
correct answer ✅a. caustic gouging
Materials which are generally larger than 2 micrometres and that
are dispersed throughout the water, are called:
a. Dissolved solids
b. Colloidal particles
c. Suspended matter
d. Dissolved matter -
correct answer ✅c. Suspended matter
Sludge is usually removed from a boiler by:
,Power Engineering - 4B6 Practice
Exam Questions & Answers (Grade
A+)
a. Filtering the water before it leaves the boiler
b. Vacuuming it from the bottom
c. Blowing off through the bottom blowoff connection
d. Blowing down through the continuous blowdown -
correct answer ✅c. Blowing off through the bottom blowoff
connection
Total boiler water alkalinity is a measurement of dissolved:
a. Carbonates, sulfates, and bicarbonates
b. Bicarbonates and chelants
c. Hydroxides, bicarbonates, and carbon dioxide
d. Hydroxides, carbonates, and bicarbonates -
correct answer ✅d. Hydroxides, carbonates, and bicarbonates
What checks should be done yearly on heating or cooling systems
that contain glycol?
, Power Engineering - 4B6 Practice
Exam Questions & Answers (Grade
A+)
a. check toxicity and specific heat
b. check for freeze point and inhibitor strength
c. check for increasing pH and dissolved carbon dioxide
d. check for viscosity and pour point -
correct answer ✅b. check for freeze point and inhibitor strength
The "total" or "methyl" alkalinity test indicates the alkalinity that is
due to:
a. Dissolved carbon dioxide
b. Sodium Bicarbonate ions
c. Hydroxide alkalinity
d. All forms of alkalinity -
correct answer ✅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
