1|Page
POWER ENGINEERING - 4A12
PRACTICE QUESTIONS WITH VERIFIED
SOLUTIONS
(4-058-4.5) One operating variable that is manipulated relatively easily and which
the operators of FBC boilers must always be aware, is:
a. Slag production
b. Fuel type variation
c. Coal introduction techniques
d. Bed expansion - correct-answer - d. Bed expansion
(4-092-1.3) One of the advantages of the refractory (gas) burner is:
a. The air and gas mixture is thoroughly preheated before it enters the furnace
,2|Page
b. The flue gases are re-circulated back to the furnace to increase the furnace
temperature
c. The flue gases are thoroughly post-heated before it leaves the furnace
d. The flame is directed to areas where it is needed the most - correct-answer - a.
The air and gas mixture is thoroughly preheated before it enters the furnace
(4-091-1.3) The two basic varieties of mechanical atomizing oil burners are the:
a. Variable capacity and modulating burners
b. Constant capacity and modulating pressure burners
c. Modulating and cluster burners
d. Rotary and reciprocating cup burners - correct-answer - b. Constant capacity
and modulating pressure burners
(4A-30-12-01-02-01) Carbon that is not combined with hydrogen is referred to as:
a. Mono-carbon
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b. Separated carbon
c. Free carbon
d. Fixed carbon - correct-answer - d. Fixed carbon
(4-056-3.1) A diaphragm draft gauge on a furnace indicates the draft in:
a. mm of water column
b. kPa
c. MPa
d. psi - correct-answer - a. mm of water column
(4-051-1.29) Water that is fed into the boiler to replace water that has been
converted into steam is called:
a. Condensate
b. Fresh water
c. Return water
, 4|Page
d. Feedwater - correct-answer - d. Feedwater
(4-092-1.17) When an atmospheric gas fired burner is burning fuel properly:
a. It will have a blue, non-luminous flame
b. There will be no turbulence
c. It will have a long bright yellow flame
d. It will have perfect combustion. - correct-answer - a. It will have a blue, non-
luminous flame
(4A-30-12-01-01-12) Which element in air will combine with the combustible
elements of the fuel?
a. Nitrogen
b. Oxygen
c. Hydrogen
d. Carbon dioxide - correct-answer - b. Oxygen
POWER ENGINEERING - 4A12
PRACTICE QUESTIONS WITH VERIFIED
SOLUTIONS
(4-058-4.5) One operating variable that is manipulated relatively easily and which
the operators of FBC boilers must always be aware, is:
a. Slag production
b. Fuel type variation
c. Coal introduction techniques
d. Bed expansion - correct-answer - d. Bed expansion
(4-092-1.3) One of the advantages of the refractory (gas) burner is:
a. The air and gas mixture is thoroughly preheated before it enters the furnace
,2|Page
b. The flue gases are re-circulated back to the furnace to increase the furnace
temperature
c. The flue gases are thoroughly post-heated before it leaves the furnace
d. The flame is directed to areas where it is needed the most - correct-answer - a.
The air and gas mixture is thoroughly preheated before it enters the furnace
(4-091-1.3) The two basic varieties of mechanical atomizing oil burners are the:
a. Variable capacity and modulating burners
b. Constant capacity and modulating pressure burners
c. Modulating and cluster burners
d. Rotary and reciprocating cup burners - correct-answer - b. Constant capacity
and modulating pressure burners
(4A-30-12-01-02-01) Carbon that is not combined with hydrogen is referred to as:
a. Mono-carbon
,3|Page
b. Separated carbon
c. Free carbon
d. Fixed carbon - correct-answer - d. Fixed carbon
(4-056-3.1) A diaphragm draft gauge on a furnace indicates the draft in:
a. mm of water column
b. kPa
c. MPa
d. psi - correct-answer - a. mm of water column
(4-051-1.29) Water that is fed into the boiler to replace water that has been
converted into steam is called:
a. Condensate
b. Fresh water
c. Return water
, 4|Page
d. Feedwater - correct-answer - d. Feedwater
(4-092-1.17) When an atmospheric gas fired burner is burning fuel properly:
a. It will have a blue, non-luminous flame
b. There will be no turbulence
c. It will have a long bright yellow flame
d. It will have perfect combustion. - correct-answer - a. It will have a blue, non-
luminous flame
(4A-30-12-01-01-12) Which element in air will combine with the combustible
elements of the fuel?
a. Nitrogen
b. Oxygen
c. Hydrogen
d. Carbon dioxide - correct-answer - b. Oxygen
