Power Engineering - 4A11 Practice
Exam Questions & Answers (Grade
A+)
What is the saturation temperature of water at 100 kPag?
a. 100C
b. 125C
c. 117C
d. 120C -
correct answer ✅d. 120C
(4-055-4.1) A tube expander is used to:
a. Break loose scale inside the tube
b. Break loose scale outside the tube
c. Expand and flare the tube
d. Bead the tube -
correct answer ✅c. Expand and flare the tube
(4-090-3.1) The water flow through a modular cast iron boiler
system:
,Power Engineering - 4A11 Practice
Exam Questions & Answers (Grade
A+)
a. Continuous through all modules
b. Connected in series
c. Intermittent, occurring only while the unit is firing
d. Done without the use of headers or manifolds -
correct answer ✅a. Continuous through all modules
(4-051-1.25) Boiler manholes are openings through which a person
can:
a. Enter the boiler furnace
b. Inspect the boiler uptake
c. Inspect, maintain or repair internal parts of a boiler
d. Enter and inspect the steam header -
correct answer ✅c. Inspect, maintain or repair internal parts of a
boiler
(4-53-4.4) The copper tube tubular heating boiler:
a. Are mostly gas fired
,Power Engineering - 4A11 Practice
Exam Questions & Answers (Grade
A+)
b. Generates high pressure steam
c. Has the furnace in the upper section
d. Is highly susceptible to corrosion -
correct answer ✅a. Are mostly gas fired
A pressure gauge on an ASME section IV steam boiler:
a. Graduated to between 1.5 and 2 times the PRV setting
b. Graduated to a maximum setting or double the MAWP
c. Graduated to a maximum setting of double the PRV setting
d. Graduated to no less than 30 psi (200 kPa), nor more than 60 psi
(414 kPa) -
correct answer ✅d. Graduated to no less than 30 psi (200 kPa), nor
more than 60 psi (414 kPa)
(4-054-1.9) Immersion boiler tube bundles:
a. Conduct current through the boiler water
b. Can be easily removed from the unit for maintenance purposes
, Power Engineering - 4A11 Practice
Exam Questions & Answers (Grade
A+)
c. Withstand extremely high temperatures and pressures
d. Have negligible electrical resistance -
correct answer ✅b. Can be easily removed from the unit for
maintenance purposes
(4-052-1.3) An internally fired boiler:
a. Is less efficient than an externally fired unit
b. Utilizes a high amount of refractory and/or firebrick
c. Has the furnace surrounded by water
d. Requires a setting -
correct answer ✅c. Has the furnace surrounded by water
(4-052-3.2) Which one of the following is NOT an advantage of a
packaged firetube boiler?
a. Large enough to provide steam for large-scale power generation
b. Lower purchase price because they are mass produced
c. Quality can be ensured prior to delivery
Exam Questions & Answers (Grade
A+)
What is the saturation temperature of water at 100 kPag?
a. 100C
b. 125C
c. 117C
d. 120C -
correct answer ✅d. 120C
(4-055-4.1) A tube expander is used to:
a. Break loose scale inside the tube
b. Break loose scale outside the tube
c. Expand and flare the tube
d. Bead the tube -
correct answer ✅c. Expand and flare the tube
(4-090-3.1) The water flow through a modular cast iron boiler
system:
,Power Engineering - 4A11 Practice
Exam Questions & Answers (Grade
A+)
a. Continuous through all modules
b. Connected in series
c. Intermittent, occurring only while the unit is firing
d. Done without the use of headers or manifolds -
correct answer ✅a. Continuous through all modules
(4-051-1.25) Boiler manholes are openings through which a person
can:
a. Enter the boiler furnace
b. Inspect the boiler uptake
c. Inspect, maintain or repair internal parts of a boiler
d. Enter and inspect the steam header -
correct answer ✅c. Inspect, maintain or repair internal parts of a
boiler
(4-53-4.4) The copper tube tubular heating boiler:
a. Are mostly gas fired
,Power Engineering - 4A11 Practice
Exam Questions & Answers (Grade
A+)
b. Generates high pressure steam
c. Has the furnace in the upper section
d. Is highly susceptible to corrosion -
correct answer ✅a. Are mostly gas fired
A pressure gauge on an ASME section IV steam boiler:
a. Graduated to between 1.5 and 2 times the PRV setting
b. Graduated to a maximum setting or double the MAWP
c. Graduated to a maximum setting of double the PRV setting
d. Graduated to no less than 30 psi (200 kPa), nor more than 60 psi
(414 kPa) -
correct answer ✅d. Graduated to no less than 30 psi (200 kPa), nor
more than 60 psi (414 kPa)
(4-054-1.9) Immersion boiler tube bundles:
a. Conduct current through the boiler water
b. Can be easily removed from the unit for maintenance purposes
, Power Engineering - 4A11 Practice
Exam Questions & Answers (Grade
A+)
c. Withstand extremely high temperatures and pressures
d. Have negligible electrical resistance -
correct answer ✅b. Can be easily removed from the unit for
maintenance purposes
(4-052-1.3) An internally fired boiler:
a. Is less efficient than an externally fired unit
b. Utilizes a high amount of refractory and/or firebrick
c. Has the furnace surrounded by water
d. Requires a setting -
correct answer ✅c. Has the furnace surrounded by water
(4-052-3.2) Which one of the following is NOT an advantage of a
packaged firetube boiler?
a. Large enough to provide steam for large-scale power generation
b. Lower purchase price because they are mass produced
c. Quality can be ensured prior to delivery
