Power Engineering - 4A12 Practice
Exam Questions & Answers (Grade
A+)
(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
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
,Power Engineering - 4A12 Practice
Exam Questions & Answers (Grade
A+)
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
b. Separated carbon
c. Free carbon
,Power Engineering - 4A12 Practice
Exam Questions & Answers (Grade
A+)
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
, Power Engineering - 4A12 Practice
Exam Questions & Answers (Grade
A+)
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
Exam Questions & Answers (Grade
A+)
(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
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
,Power Engineering - 4A12 Practice
Exam Questions & Answers (Grade
A+)
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
b. Separated carbon
c. Free carbon
,Power Engineering - 4A12 Practice
Exam Questions & Answers (Grade
A+)
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
, Power Engineering - 4A12 Practice
Exam Questions & Answers (Grade
A+)
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
