Power Engineering - 4A11 Practice Questions With
Complete Solutions
( 4-090-1.5) A disadvantage of a cast iron boiler is:
a. It is subject to corrosion
b. Its difficult assembly
c. Its extremely high cost
d. They are prone to leaks in-between the sections Correct
Answers d. They are prone to leaks in-between the sections
(4-051-1.1) A high-pressure steam boiler is one in which steam
is generated at a pressure greater than:
a. 100 kPa
b. 101.3 kPa
c. 50 kPa
d. 75 kPa Correct Answers a. 100 kPa
(4-051-1.13) The windbox of a boiler is:
a. Where the fuel and air are mixed for combustion
b. The collector of the exhaust gases before they go into the
uptake
c. The chamber through which combustion air is introduced to
the boiler furnace
d. Always maintained at a negative pressure Correct Answers c.
The chamber through which combustion air is introduced to the
boiler furnace
,(4-051-1.14) The boiler term "drum" commonly refers to the
pressure container of a watertube boiler, whereas the term
"_____" commonly refers to the pressure vessel of a firetube
boiler
a. Vessel
b. Shell
c. Tank
d. Cylinder Correct Answers b. Shell
(4-051-1.20) The passage of combustion gases along the length
of the boiler is referred to as a:
a. Stack pass
b. Combustion gas pass
c. Combustion air pass
d. Chimney pass Correct Answers b. Combustion gas pass
(4-051-1.24) On older boilers, the masonry work that
surrounded the furnace was termed:
a. The boiler firebox
b. Masonry
c. The boiler setting
d. The boiler casing Correct Answers c. The boiler setting
(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 Answers c.
Inspect, maintain or repair internal parts of a boiler
(4-051-1.28) What type of furnace is surrounded by brickwork
rather than by water?
a. Externally fired
b. Cyclone furnace
c. Staged combustion furnace
d. Internally fired Correct Answers a. Externally fired
(4-051-1.3) A hot water boiler is considered a high temperature
water boiler when:
a. its design pressure is less than 1100 kPa
b. its operating temperature is greater than 120°C
c. its operating temperature is less than 120°C
d. its energy input exceeds 58.7 kW Correct Answers b. its
operating temperature is greater than 120°C
(4-051-1.32) Boiler handholes are openings that are use to:
a. Enter and inspect the boiler furnace
b. Inspect the boiler uptake
c. Inspect the boiler shell or drum
d. Inspect the windbox Correct Answers c. Inspect the boiler
shell or drum
(4-051-1.33) When part of firetube boilers, heads are commonly
called what ?
Complete Solutions
( 4-090-1.5) A disadvantage of a cast iron boiler is:
a. It is subject to corrosion
b. Its difficult assembly
c. Its extremely high cost
d. They are prone to leaks in-between the sections Correct
Answers d. They are prone to leaks in-between the sections
(4-051-1.1) A high-pressure steam boiler is one in which steam
is generated at a pressure greater than:
a. 100 kPa
b. 101.3 kPa
c. 50 kPa
d. 75 kPa Correct Answers a. 100 kPa
(4-051-1.13) The windbox of a boiler is:
a. Where the fuel and air are mixed for combustion
b. The collector of the exhaust gases before they go into the
uptake
c. The chamber through which combustion air is introduced to
the boiler furnace
d. Always maintained at a negative pressure Correct Answers c.
The chamber through which combustion air is introduced to the
boiler furnace
,(4-051-1.14) The boiler term "drum" commonly refers to the
pressure container of a watertube boiler, whereas the term
"_____" commonly refers to the pressure vessel of a firetube
boiler
a. Vessel
b. Shell
c. Tank
d. Cylinder Correct Answers b. Shell
(4-051-1.20) The passage of combustion gases along the length
of the boiler is referred to as a:
a. Stack pass
b. Combustion gas pass
c. Combustion air pass
d. Chimney pass Correct Answers b. Combustion gas pass
(4-051-1.24) On older boilers, the masonry work that
surrounded the furnace was termed:
a. The boiler firebox
b. Masonry
c. The boiler setting
d. The boiler casing Correct Answers c. The boiler setting
(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 Answers c.
Inspect, maintain or repair internal parts of a boiler
(4-051-1.28) What type of furnace is surrounded by brickwork
rather than by water?
a. Externally fired
b. Cyclone furnace
c. Staged combustion furnace
d. Internally fired Correct Answers a. Externally fired
(4-051-1.3) A hot water boiler is considered a high temperature
water boiler when:
a. its design pressure is less than 1100 kPa
b. its operating temperature is greater than 120°C
c. its operating temperature is less than 120°C
d. its energy input exceeds 58.7 kW Correct Answers b. its
operating temperature is greater than 120°C
(4-051-1.32) Boiler handholes are openings that are use to:
a. Enter and inspect the boiler furnace
b. Inspect the boiler uptake
c. Inspect the boiler shell or drum
d. Inspect the windbox Correct Answers c. Inspect the boiler
shell or drum
(4-051-1.33) When part of firetube boilers, heads are commonly
called what ?
