Power Engineering - 4B (Part 2) Exam
Questions & Answers (Grade A+)
Activated carbon is produced from carbonaceous material such as:
1. coal
2. wood
3. magnesium
4. coconut shells
5. peat
a. 1, 3, 4, 5
b. 1, 2, 4, 5
c. 1, 2, 3, 5
d. 2, 3, 4, 5
e. 1, 2, 3, 4 -
correct answer ✅b. 1, 2, 4, 5
Pitting of boiler metal may be prevented by
a. agitating the feed water before it enters the boiler
b. the addition of sodium sulphate to the feed water
c. cooling the feed water to between 4C and 16C
,Power Engineering - 4B (Part 2) Exam
Questions & Answers (Grade A+)
d. heating the boiler feed water to between 80C and 105C before it
enters the boiler
e. the addition of sodium chloride to the feed water -
correct answer ✅d. heating the boiler feed water to between 80C
and 105C before it enters the boiler
Bicarbonates can be easily removed from the feedwater by:
a. blowing down the boiler
b. using filter tanks
c. heating the water just below its boiling point
d. passing the water through a deaerator
e. adding an additional screen -
correct answer ✅c. heating the water just below its boiling point
The spray-type and tray-type are the two basic configurations of
mechanical ---------- used to remove dissolved solids:
a. clarifiers
b. deaerators
c. softeners
,Power Engineering - 4B (Part 2) Exam
Questions & Answers (Grade A+)
d. scrubbers -
correct answer ✅b. deaerators
Sodium zeolite softeners
a. remove all dissolved solids from the water
b. remove all dissolved solids and suspended matter from the water
c. remove calcium and magnesium from the water
d. are regenerated with an alkaline solution
e. are regenerated with an acid solution -
correct answer ✅c. remove calcium and magnesium from the
water
It is not true that boiler water is treated for:
a. maintaining boiler water pH below 6
b. preventing carryover of impurities
c. scale prevention at its water side
d. corrosion prevention at boiler
, Power Engineering - 4B (Part 2) Exam
Questions & Answers (Grade A+)
e. sludge prevention at its water side -
correct answer ✅a. maintaining boiler water pH below 6
Filters are used
a. for internal treatment
b. to remove hardness
c. to remove dissolved solids
d. for external water treatment
e. to remove calcium bicarbonates -
correct answer ✅d. for external water treatment
A filter should be backwashed in order to:
a. regenerate the filter
b. dissolve the suspended matter
c. transfer liquid in the opposite direction
d. flush the trapped impurities to waste
e. oxidize the water -
correct answer ✅d. flush the trapped impurities to waste
Questions & Answers (Grade A+)
Activated carbon is produced from carbonaceous material such as:
1. coal
2. wood
3. magnesium
4. coconut shells
5. peat
a. 1, 3, 4, 5
b. 1, 2, 4, 5
c. 1, 2, 3, 5
d. 2, 3, 4, 5
e. 1, 2, 3, 4 -
correct answer ✅b. 1, 2, 4, 5
Pitting of boiler metal may be prevented by
a. agitating the feed water before it enters the boiler
b. the addition of sodium sulphate to the feed water
c. cooling the feed water to between 4C and 16C
,Power Engineering - 4B (Part 2) Exam
Questions & Answers (Grade A+)
d. heating the boiler feed water to between 80C and 105C before it
enters the boiler
e. the addition of sodium chloride to the feed water -
correct answer ✅d. heating the boiler feed water to between 80C
and 105C before it enters the boiler
Bicarbonates can be easily removed from the feedwater by:
a. blowing down the boiler
b. using filter tanks
c. heating the water just below its boiling point
d. passing the water through a deaerator
e. adding an additional screen -
correct answer ✅c. heating the water just below its boiling point
The spray-type and tray-type are the two basic configurations of
mechanical ---------- used to remove dissolved solids:
a. clarifiers
b. deaerators
c. softeners
,Power Engineering - 4B (Part 2) Exam
Questions & Answers (Grade A+)
d. scrubbers -
correct answer ✅b. deaerators
Sodium zeolite softeners
a. remove all dissolved solids from the water
b. remove all dissolved solids and suspended matter from the water
c. remove calcium and magnesium from the water
d. are regenerated with an alkaline solution
e. are regenerated with an acid solution -
correct answer ✅c. remove calcium and magnesium from the
water
It is not true that boiler water is treated for:
a. maintaining boiler water pH below 6
b. preventing carryover of impurities
c. scale prevention at its water side
d. corrosion prevention at boiler
, Power Engineering - 4B (Part 2) Exam
Questions & Answers (Grade A+)
e. sludge prevention at its water side -
correct answer ✅a. maintaining boiler water pH below 6
Filters are used
a. for internal treatment
b. to remove hardness
c. to remove dissolved solids
d. for external water treatment
e. to remove calcium bicarbonates -
correct answer ✅d. for external water treatment
A filter should be backwashed in order to:
a. regenerate the filter
b. dissolve the suspended matter
c. transfer liquid in the opposite direction
d. flush the trapped impurities to waste
e. oxidize the water -
correct answer ✅d. flush the trapped impurities to waste
