Power Engineering 3B1 Chapter 10,
Chapter 11 Exam Questions And
Answers
Subsidence is accomplished by passing water through a basin or
tank of such design that the velocity of the water is reduced to a
point, to permit ___________.
a. subsidence
b. coagulation
c. flocculation
d. filtering - - correct answer ✅b
A normal operating pressure range for a deaerator is - - correct
answer ✅A) 70 to 100 kPa
The component of a boiler which allows a space for the
introduction of chemicals is the
a) mud drum
b) steam drum
c) injection tank
d) internal feed pipe
e) deaerator - - correct answer ✅B
,Power Engineering 3B1 Chapter 10,
Chapter 11 Exam Questions And
Answers
Which of the following is caused from scale buildup on boiler tubes:
1. Increased boiler efficiency
2. Weakening of tube metal
3. Decreased boiler efficiency
4. Increased flue gas temperature
5. Cracks in boiler tubes
a. 1,2,3,4
b. 1,3,4,5
c. 2,3,4,5
d. 1,2,4,5
e. 1,2,3,5 - - correct answer ✅c
An acceptable pH value for boiler water is
a) 7.00
b) 6.95
c) 8.35
d) 10.50
e) 11.75 - - correct answer ✅D
,Power Engineering 3B1 Chapter 10,
Chapter 11 Exam Questions And
Answers
Ssuspended matter is removed from the feedwater to - - correct
answer ✅Avoid preheating of boiler metal and prevent foaming
__________ are chemicals, which cause the fine particles to gather
together into a larger mass, which will settle out much more
readily.
a. Caustic
b. Coagulants
c. Acids
d. Zeolite - - correct answer ✅b
When adding phosphate to the boiler water, the chemical may:
1. Combine with dissolved solids in the boiler water
2. Decrease the dissolved solids in the boiler water
3. Increase the suspended solids in the boiler water
4. Increase the pH of the boiler water
a. 1,2,3
b. 1,2,4
c. 1,3,4
d. 2,3,4
, Power Engineering 3B1 Chapter 10,
Chapter 11 Exam Questions And
Answers
e. 1,2,3,4 - - correct answer ✅c
Temporary hardness in feedwater is caused by - - correct answer
✅Magnesium bicarbonate
Relative to internal treatment, it is customary to
a) precipitate dissolved solids with a "precipitator"
b) cause dissolved solids to remain in solution
c) filter out dissolved solids
d) treat the dissolved solids so they remain dispersed
e) condition the dissolved solids so they do not adhere to metal - -
correct answer ✅A
Having the pH of a boiler too high can cause: - - correct answer
✅E) Foaming & Caustic Embrittlement
A boiler steam drum will
a) allow load increases to be accomplished more quickly
b) always be the highest component of a boiler
Chapter 11 Exam Questions And
Answers
Subsidence is accomplished by passing water through a basin or
tank of such design that the velocity of the water is reduced to a
point, to permit ___________.
a. subsidence
b. coagulation
c. flocculation
d. filtering - - correct answer ✅b
A normal operating pressure range for a deaerator is - - correct
answer ✅A) 70 to 100 kPa
The component of a boiler which allows a space for the
introduction of chemicals is the
a) mud drum
b) steam drum
c) injection tank
d) internal feed pipe
e) deaerator - - correct answer ✅B
,Power Engineering 3B1 Chapter 10,
Chapter 11 Exam Questions And
Answers
Which of the following is caused from scale buildup on boiler tubes:
1. Increased boiler efficiency
2. Weakening of tube metal
3. Decreased boiler efficiency
4. Increased flue gas temperature
5. Cracks in boiler tubes
a. 1,2,3,4
b. 1,3,4,5
c. 2,3,4,5
d. 1,2,4,5
e. 1,2,3,5 - - correct answer ✅c
An acceptable pH value for boiler water is
a) 7.00
b) 6.95
c) 8.35
d) 10.50
e) 11.75 - - correct answer ✅D
,Power Engineering 3B1 Chapter 10,
Chapter 11 Exam Questions And
Answers
Ssuspended matter is removed from the feedwater to - - correct
answer ✅Avoid preheating of boiler metal and prevent foaming
__________ are chemicals, which cause the fine particles to gather
together into a larger mass, which will settle out much more
readily.
a. Caustic
b. Coagulants
c. Acids
d. Zeolite - - correct answer ✅b
When adding phosphate to the boiler water, the chemical may:
1. Combine with dissolved solids in the boiler water
2. Decrease the dissolved solids in the boiler water
3. Increase the suspended solids in the boiler water
4. Increase the pH of the boiler water
a. 1,2,3
b. 1,2,4
c. 1,3,4
d. 2,3,4
, Power Engineering 3B1 Chapter 10,
Chapter 11 Exam Questions And
Answers
e. 1,2,3,4 - - correct answer ✅c
Temporary hardness in feedwater is caused by - - correct answer
✅Magnesium bicarbonate
Relative to internal treatment, it is customary to
a) precipitate dissolved solids with a "precipitator"
b) cause dissolved solids to remain in solution
c) filter out dissolved solids
d) treat the dissolved solids so they remain dispersed
e) condition the dissolved solids so they do not adhere to metal - -
correct answer ✅A
Having the pH of a boiler too high can cause: - - correct answer
✅E) Foaming & Caustic Embrittlement
A boiler steam drum will
a) allow load increases to be accomplished more quickly
b) always be the highest component of a boiler
