Power Engineering 3B1 Exam Review 2 UPDATED ACTUAL Questions
and CORRECT Answers
Question: A boiler explosion due to overheating of the heating surfaces may result from
Correct Answer: Select one: A. Improper furnace purge B. A faulty low gas pressure switch C. A
low-water cut-off malfunction D. Combustion air switch failure E. A faulty flame scanner: C
Question: The main advantage of the packaged boiler is its
Correct Answer: Select one: A. small size B. compact design C. low cost D. quality steam: C
Question: The flow of liquid through the rotary pump is continuous and the discharge has _______
pressure fluctuations. Select one
Correct Answer: A. minimal B. maximum C. standard D. large: A
Question: The submerged arc welding process (SAW) is a high deposition, high quality welding process
widely used to join _____ sections in the flat, horizontal position. Select one
Correct Answer: A. thin B. thick C. butt D. beveled: B
Question: As the liquid travels through the volute casing of a centrifugal pump toward the discharge, its
______ energy is converted into pressure or potential energy. Select one
Correct Answer: A. rotation B. fluids C. kinetic D. electrical: C
Question: The Gas Recirculation method is used to maintain the desired steam temperature at ________
loads. Select one
Correct Answer: A. high B. partial C. over D. no: B
Question: The steam atomizer type burners operate on the principle of producing a steam-fuel emulsion
that atomizes the oil through the rapid _______ of the steam when released into the furnace. Select one
Correct Answer: A. expansion B. velocity C. temperature D. movement: A
Question: Lack of _______, or more precisely, incomplete joint penetration, is a group of weld
discontinuities where fusion did not occur between weld metal and the base metal or between overlapping
weld beads. Select one
Correct Answer: A. Fusion B. Undercut C. Overlap D. Underfill: A
Question: Pinhole grates have __________ air holes to admit air to the burning material on the grate. Select
one
Correct Answer: A. venturi-type B. square C. round D. large: A
Question: The coagulant, when added to the water, will produce a spongy substance known as _____.
Select one
Correct Answer: A. mud B. floc C. sand D. waste: B
Question: Loads caused by piping and equipment attached to the pressure vessel is transferred to the vessel
by nozzles. Select one
Correct Answer: A) True B) False: A
, Question: It is standard practice to ________ an opening with the same cross-sectional area that was
removed. Select one
Correct Answer: A. make B. reinforce C. cut D. replace: B
Question: With the _________ feed system, it is common practice to mix one batch of chemicals per day.
Select one
Correct Answer: A. closed bypass B. shot C. slug D. continuous: D
Question: Because of the low operating temperatures, an inexpensive material such as CaCO3 (lime) can
be added to a fluidized bed. It acts as a sorbent to remove _____ from the flue gases. Select one
Correct Answer: A. SO2 B. O2 C. NOx D. Water: A
Question: In a fuel flow - airflow combustion control system, the fuel flow signal makes the final
adjustment to the ________. Select one
Correct Answer: A. feedwater B. fuel C. airflow D. drum level: C
Question: An overfeed stoker uses the _____________ flow of fuel and air, with fuel flowing downward
and air flowing upward. Select one
Correct Answer: A. cocurrent B. crosscurrent C. countercurrent D. undercurrent: C
Question: Most burners have the fuel entering the combustion air stream at or near a ______ angle to
promote good mixing. Select one
Correct Answer: A. cross B. right C. upward D. down: B
Question: The external gear pump
Correct Answer: Select one: A. has two gears, which rotate in opposite directions inside the casing. B. has
an externally-cut gear that meshes with an internally-cut gear, separated by a crescent-shaped partition. C.
has a rotor containing vanes within slots. D. has two rotors each with three lobes. E. has two rotors each
with two opposing spirals or screw threads.: A
Question: The water coming out of the weak acid cation dealkalizer contains the residual (non-exchanged)
hardness ions and carbon dioxide. This carbon dioxide, due to its potential to cause corrosion problems on
the piping systems and downstream equipment, is degasified. Select one
Correct Answer: A) True B) False: A
Question: The primary function of a recovery boiler is to process ______ liquor. Select one
Correct Answer: A. white B. green C. black D. liquor: C
Question: If allowed to remain in the water, _______ acid will break down into carbon dioxide, which
causes corrosion. Select one
Correct Answer: A. sulphuric B. hydrocloric C. carbonic D. silicic: C
Question: A hydrogen zeolite softener is used to remove the scale forming _____ , without the formation of
sodium bicarbonate. Select one
Correct Answer: A. salts B. carbonic C. magnesium D. sulphates: A
Question: The heating of heavy fuel oil takes place in ___ stages. Select one
Correct Answer: A. three B. five C. many D. two: D
and CORRECT Answers
Question: A boiler explosion due to overheating of the heating surfaces may result from
Correct Answer: Select one: A. Improper furnace purge B. A faulty low gas pressure switch C. A
low-water cut-off malfunction D. Combustion air switch failure E. A faulty flame scanner: C
Question: The main advantage of the packaged boiler is its
Correct Answer: Select one: A. small size B. compact design C. low cost D. quality steam: C
Question: The flow of liquid through the rotary pump is continuous and the discharge has _______
pressure fluctuations. Select one
Correct Answer: A. minimal B. maximum C. standard D. large: A
Question: The submerged arc welding process (SAW) is a high deposition, high quality welding process
widely used to join _____ sections in the flat, horizontal position. Select one
Correct Answer: A. thin B. thick C. butt D. beveled: B
Question: As the liquid travels through the volute casing of a centrifugal pump toward the discharge, its
______ energy is converted into pressure or potential energy. Select one
Correct Answer: A. rotation B. fluids C. kinetic D. electrical: C
Question: The Gas Recirculation method is used to maintain the desired steam temperature at ________
loads. Select one
Correct Answer: A. high B. partial C. over D. no: B
Question: The steam atomizer type burners operate on the principle of producing a steam-fuel emulsion
that atomizes the oil through the rapid _______ of the steam when released into the furnace. Select one
Correct Answer: A. expansion B. velocity C. temperature D. movement: A
Question: Lack of _______, or more precisely, incomplete joint penetration, is a group of weld
discontinuities where fusion did not occur between weld metal and the base metal or between overlapping
weld beads. Select one
Correct Answer: A. Fusion B. Undercut C. Overlap D. Underfill: A
Question: Pinhole grates have __________ air holes to admit air to the burning material on the grate. Select
one
Correct Answer: A. venturi-type B. square C. round D. large: A
Question: The coagulant, when added to the water, will produce a spongy substance known as _____.
Select one
Correct Answer: A. mud B. floc C. sand D. waste: B
Question: Loads caused by piping and equipment attached to the pressure vessel is transferred to the vessel
by nozzles. Select one
Correct Answer: A) True B) False: A
, Question: It is standard practice to ________ an opening with the same cross-sectional area that was
removed. Select one
Correct Answer: A. make B. reinforce C. cut D. replace: B
Question: With the _________ feed system, it is common practice to mix one batch of chemicals per day.
Select one
Correct Answer: A. closed bypass B. shot C. slug D. continuous: D
Question: Because of the low operating temperatures, an inexpensive material such as CaCO3 (lime) can
be added to a fluidized bed. It acts as a sorbent to remove _____ from the flue gases. Select one
Correct Answer: A. SO2 B. O2 C. NOx D. Water: A
Question: In a fuel flow - airflow combustion control system, the fuel flow signal makes the final
adjustment to the ________. Select one
Correct Answer: A. feedwater B. fuel C. airflow D. drum level: C
Question: An overfeed stoker uses the _____________ flow of fuel and air, with fuel flowing downward
and air flowing upward. Select one
Correct Answer: A. cocurrent B. crosscurrent C. countercurrent D. undercurrent: C
Question: Most burners have the fuel entering the combustion air stream at or near a ______ angle to
promote good mixing. Select one
Correct Answer: A. cross B. right C. upward D. down: B
Question: The external gear pump
Correct Answer: Select one: A. has two gears, which rotate in opposite directions inside the casing. B. has
an externally-cut gear that meshes with an internally-cut gear, separated by a crescent-shaped partition. C.
has a rotor containing vanes within slots. D. has two rotors each with three lobes. E. has two rotors each
with two opposing spirals or screw threads.: A
Question: The water coming out of the weak acid cation dealkalizer contains the residual (non-exchanged)
hardness ions and carbon dioxide. This carbon dioxide, due to its potential to cause corrosion problems on
the piping systems and downstream equipment, is degasified. Select one
Correct Answer: A) True B) False: A
Question: The primary function of a recovery boiler is to process ______ liquor. Select one
Correct Answer: A. white B. green C. black D. liquor: C
Question: If allowed to remain in the water, _______ acid will break down into carbon dioxide, which
causes corrosion. Select one
Correct Answer: A. sulphuric B. hydrocloric C. carbonic D. silicic: C
Question: A hydrogen zeolite softener is used to remove the scale forming _____ , without the formation of
sodium bicarbonate. Select one
Correct Answer: A. salts B. carbonic C. magnesium D. sulphates: A
Question: The heating of heavy fuel oil takes place in ___ stages. Select one
Correct Answer: A. three B. five C. many D. two: D
