DC BOILER STATIONARY THIRD TESTING EXAM 2023-2024 ACTUAL EXAM 200 QUESTIONS AND CORRECT
DETAILED ANSWERS
What is the thermal efficiency percentage of boiler with a stack temperature of 600 F and furnace
temperature of 2800 F ? - (answer) 78.5
What is the proper order of zeolite rejuvenation water softener . - (answer) Back Wash, Brine, Rinse ,
and Service
given the three phase 480-volt motor has a current draw of 42amps and a power factor rating of 90% -
(answer) 181
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
, DC BOILER STATIONARY THIRD TESTING EXAM 2023-2024 ACTUAL EXAM 200 QUESTIONS AND CORRECT
DETAILED ANSWERS
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
which of the following is not purpose of an air cock on a steam drum ? - (answer) to let the air escape
while filing the drum
which of the following types of boiler is more suited for pressure exceeding 350 psi? - (answer) Scotch
Marine
An automatic control valve commonly used to maintain feed water level in a boiler whose internal
design is constructed with 2 valve and ? - (answer) balancing valve
what are the 2 chief heat producing elements? - (answer) carbon and hydrogen
copper testing is used to detect ? - (answer) heat exchanger and pump water
and on and off type control system is usually found on what type of boiler? - (answer) package fire
tube boiler
DETAILED ANSWERS
What is the thermal efficiency percentage of boiler with a stack temperature of 600 F and furnace
temperature of 2800 F ? - (answer) 78.5
What is the proper order of zeolite rejuvenation water softener . - (answer) Back Wash, Brine, Rinse ,
and Service
given the three phase 480-volt motor has a current draw of 42amps and a power factor rating of 90% -
(answer) 181
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
, DC BOILER STATIONARY THIRD TESTING EXAM 2023-2024 ACTUAL EXAM 200 QUESTIONS AND CORRECT
DETAILED ANSWERS
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
which of the following is not purpose of an air cock on a steam drum ? - (answer) to let the air escape
while filing the drum
which of the following types of boiler is more suited for pressure exceeding 350 psi? - (answer) Scotch
Marine
An automatic control valve commonly used to maintain feed water level in a boiler whose internal
design is constructed with 2 valve and ? - (answer) balancing valve
what are the 2 chief heat producing elements? - (answer) carbon and hydrogen
copper testing is used to detect ? - (answer) heat exchanger and pump water
and on and off type control system is usually found on what type of boiler? - (answer) package fire
tube boiler
