Power Engineering 3B1 Chapter 4
Questions with Complete Solutions
(Latest 2025)
What is the main purpose of baffles in the setting of a boiler?
a. To supply strength to the setting
b. To allow hot gases to make more than one pass through a
boiler
c. To produce eddy currents
d. To cause a restriction of gas flow
e. to mix the fuel gas and the combustion air for complete
combustion - Correct Answers ✅b
Which of the following are disadvantages of using baffles in a
boiler setting?
1. Eddy currents can be produced
2. Increased friction can result
3. Coal fired boilers can result in pockets of ash accumulation
4. Heat transfer is increased
a. 1,2,3,4
b. 1,2,3
c. 2,3,4 d. 2,4
e. 1,3,4 - Correct Answers ✅b
In order to direct the flow of combustion gas over the tubes in
a watertube boiler, it is necessary to use _______.
,Power Engineering 3B1 Chapter 4
Questions with Complete Solutions
(Latest 2025)
a. baffles
b. deflectors
c. fans
d. preheaters - Correct Answers ✅a
Baffles can be placed so as to cause the gases to flow at right
angles to the tube length, in which case they are called
________ baffles.
a. longitudinal
b. cross
c. back
d. straight - Correct Answers ✅b
Baffles may be placed so as to cause the gases to flow
parallel to the tubes, in which case they are called _________
baffles.
a. longitudinal
b. cross
c. back
d. straight - Correct Answers ✅a
Baffles are usually constructed of ___________ material and
may be made up of individual bricks or tiles.
, Power Engineering 3B1 Chapter 4
Questions with Complete Solutions
(Latest 2025)
a. steel
b. castable
c. refractory
d. insulation - Correct Answers ✅c
Curved or streamlined baffles have the ________ of having no
sharp turns to cause eddy currents, increase friction, or form
pockets for ash accumulation.
a. disadvantage
b. habit
c. source
d. advantage - Correct Answers ✅d
Metal fin bars are welded to adjacent tubes, forming a
continuous surface and a pressure- tight wall, this is referred
to as a welded fin tube wall or a ________ wall.
a. solid
b. membrane
c. screen tube
d. tangent tube - Correct Answers ✅b
A wall suitable for severe service, here the tubes are side by
side and touching each other, this is called a ________ wall.
Questions with Complete Solutions
(Latest 2025)
What is the main purpose of baffles in the setting of a boiler?
a. To supply strength to the setting
b. To allow hot gases to make more than one pass through a
boiler
c. To produce eddy currents
d. To cause a restriction of gas flow
e. to mix the fuel gas and the combustion air for complete
combustion - Correct Answers ✅b
Which of the following are disadvantages of using baffles in a
boiler setting?
1. Eddy currents can be produced
2. Increased friction can result
3. Coal fired boilers can result in pockets of ash accumulation
4. Heat transfer is increased
a. 1,2,3,4
b. 1,2,3
c. 2,3,4 d. 2,4
e. 1,3,4 - Correct Answers ✅b
In order to direct the flow of combustion gas over the tubes in
a watertube boiler, it is necessary to use _______.
,Power Engineering 3B1 Chapter 4
Questions with Complete Solutions
(Latest 2025)
a. baffles
b. deflectors
c. fans
d. preheaters - Correct Answers ✅a
Baffles can be placed so as to cause the gases to flow at right
angles to the tube length, in which case they are called
________ baffles.
a. longitudinal
b. cross
c. back
d. straight - Correct Answers ✅b
Baffles may be placed so as to cause the gases to flow
parallel to the tubes, in which case they are called _________
baffles.
a. longitudinal
b. cross
c. back
d. straight - Correct Answers ✅a
Baffles are usually constructed of ___________ material and
may be made up of individual bricks or tiles.
, Power Engineering 3B1 Chapter 4
Questions with Complete Solutions
(Latest 2025)
a. steel
b. castable
c. refractory
d. insulation - Correct Answers ✅c
Curved or streamlined baffles have the ________ of having no
sharp turns to cause eddy currents, increase friction, or form
pockets for ash accumulation.
a. disadvantage
b. habit
c. source
d. advantage - Correct Answers ✅d
Metal fin bars are welded to adjacent tubes, forming a
continuous surface and a pressure- tight wall, this is referred
to as a welded fin tube wall or a ________ wall.
a. solid
b. membrane
c. screen tube
d. tangent tube - Correct Answers ✅b
A wall suitable for severe service, here the tubes are side by
side and touching each other, this is called a ________ wall.
