DC THIRD CLASS STATIONARY BOILERS 323
EXAM 2026 PRACTICE QUESTIONS AND
ANSWERS
◉ a four-wire wye-connected system with a phase-to-phase voltage
of 208 volt has a volta has a phase to neutral voltage of 120 volts
Answer: 120 volts
◉ steam (High Velocity) what kind of energy ? Answer: Mechanical
◉ Which of the following statement is not ture concerning a
superheat ? Answer: Super Heater (BTU)
◉ The ______ pump supplies the water to the condenser to condense
the steam. Answer: Condensate
◉ What is the first thing that happen for a three-element regulator
to change the output of the controller? Answer: Condensate Flow
Increases
◉ The primary reason for using wet scrubbers is to ? Answer:
Remove flue gas particulates
, ◉ What is used on the outer rim of the blades or nozzles to stiffen
the blade against vibration and confine the steam to the ________ ?
Answer: Shroud Ring
◉ The refrigerant in a condenser to usually sub cooled between
_________ degree F below the condensing temperature? Answer: .7 to
9 degrees
◉ if you are operation a boiler with a three-element feed water
regulator, when is being measured and recorded by mechanically
operated water ? Answer: Steam Flow, Feedwater and drum level
◉ given thermocouples have both a hot junction and a cold junction.
the cold junction measured the ____________ point ? Answer: Reference
◉ A water heating system that uses the same pipe for supply and
return is called a __________ system Answer: One pipe
◉ a malfunction in the deaerate feed water tank is indicated by ?
Answer: Boiler requiring excessive amount of oxygen scavenge
chemicals.
◉ what uses the theory of centirifical force that applies to the
roating element of turbine and controls the speed of the turbine?
Answer: Speed Governor
EXAM 2026 PRACTICE QUESTIONS AND
ANSWERS
◉ a four-wire wye-connected system with a phase-to-phase voltage
of 208 volt has a volta has a phase to neutral voltage of 120 volts
Answer: 120 volts
◉ steam (High Velocity) what kind of energy ? Answer: Mechanical
◉ Which of the following statement is not ture concerning a
superheat ? Answer: Super Heater (BTU)
◉ The ______ pump supplies the water to the condenser to condense
the steam. Answer: Condensate
◉ What is the first thing that happen for a three-element regulator
to change the output of the controller? Answer: Condensate Flow
Increases
◉ The primary reason for using wet scrubbers is to ? Answer:
Remove flue gas particulates
, ◉ What is used on the outer rim of the blades or nozzles to stiffen
the blade against vibration and confine the steam to the ________ ?
Answer: Shroud Ring
◉ The refrigerant in a condenser to usually sub cooled between
_________ degree F below the condensing temperature? Answer: .7 to
9 degrees
◉ if you are operation a boiler with a three-element feed water
regulator, when is being measured and recorded by mechanically
operated water ? Answer: Steam Flow, Feedwater and drum level
◉ given thermocouples have both a hot junction and a cold junction.
the cold junction measured the ____________ point ? Answer: Reference
◉ A water heating system that uses the same pipe for supply and
return is called a __________ system Answer: One pipe
◉ a malfunction in the deaerate feed water tank is indicated by ?
Answer: Boiler requiring excessive amount of oxygen scavenge
chemicals.
◉ what uses the theory of centirifical force that applies to the
roating element of turbine and controls the speed of the turbine?
Answer: Speed Governor
