NCCER BOILERMAKER MAINTENANCE EXAM
LATEST ACTUAL EXAM WITH 150 QUESTIONS AND
CORRECT VERIFIED ANSWERS |WELL GRADED A+
if you are found in violation of licensing rules, what is the first warning you will receive? -
CORRECT ANSWERS-written warning
an impulse turbine utilizes one row of stationary nozzle which increase the velocity of
the steam enough to drive two rows of rotating blades. this type of turbine is called a(n)
- CORRECT ANSWERS-velocity-compounded turbine
a steam turbine that operates at 500 psi is considered - CORRECT ANSWERS-high
pressure ( 150 psi and less is low pressure, 151-400 is medium pressure, over 400 is
high pressure)
considering the limitation on material of construction of a steam turbine, what is the
maximum temp of steam that may be used? - CORRECT ANSWERS-1100F
what is the maximum acceptable level of dissolved solids in the steam being supplied to
a steam turbine - CORRECT ANSWERS-0.1 ppm
what is the proper temp for turbine bearings during normal operation - CORRECT
ANSWERS-140-150F
the proper procedure for cleaning a turbine oil cooler is : - CORRECT ANSWERS-place
the entire tube bundle in a cleaning tank
which of the following is FALSE about required properties of lubricating oil in a turbine?
- CORRECT ANSWERS-oil must be able to mix with water
in what type of turbine lubricating oil filtration system is oil removed at intervals and
replaced with new or reconditioned oil? - CORRECT ANSWERS-makeup system
if a turbine has begin spinning and heat is being generated in the bearings at what temp
should you add cooling water to the bearings? - CORRECT ANSWERS-110-120F
what is the function of a dashpot, as part of a steam turbine governor? - CORRECT
ANSWERS-to prevent overtravel due to the weight of the governor linkage
what is the most economical way to partially load a small steam turbine? - CORRECT
ANSWERS-use the minimum number of hand-controlled steam nozzles feasble
which of the following is a yearly inspection for a steam turbine - CORRECT
ANSWERS-inspect oil and steam atomizers
, which of the following would cause vibrations in a turbine? - CORRECT ANSWERS-
improper air gap in the generator?
when a steam turbine is to be shut down, what step should be taken first? - CORRECT
ANSWERS-gradually reduce the load to zero
what is used to keep SO2 down? - CORRECT ANSWERS-wet and dry scrubbers
a wet scrubber that has been maintained properly has the capability of absorbing
______% of the SO2 in the flue gas - CORRECT ANSWERS-90%
Materials of construction of a flue gas scrubber system must be selected to resist what
hostile conditions? - CORRECT ANSWERS-low pH conditions and abrasion
the efficiency of a spray pond or cooling tower is based on? - CORRECT ANSWERS-
wet bulb temperature or relative humidity of the ambient air
when placing an induced draft cooling tower into service, which is the last step
performed? - CORRECT ANSWERS-start the i.d. fans
when operating an induced draft cooling tower, which of the following statements is
FALSE - CORRECT ANSWERS-it is more economical to operate one fan at high speed
than two fans at low speed
what condition could be prevented by keeping the pH of water greater than 7? -
CORRECT ANSWERS-corrosion
which chemical is often used to control algae accumulation in cooling towers? -
CORRECT ANSWERS-copper sulfate
(LP) what is the minimum percentage of oxygen that must be present in a confined
space before entering? - CORRECT ANSWERS-19.5%
(LP) which of the following should you not tag and lock out when a boiler is shut down
for inspection? - CORRECT ANSWERS-top tri cock or boiler vent
what is the first thing that must be done when starting up a brand new boiler? -
CORRECT ANSWERS-boil the boiler out
which of the following is not done during a boiler start up? - CORRECT ANSWERS-fill
the boiler to the NOWL
when starting a fire in a coal_fired boiler with chain grates or traveling grates, how much
coal should be on the grates? - CORRECT ANSWERS-3-4 inches
when should a non-return valve be opened when putting a boiler on line? - CORRECT
ANSWERS-when the boiler pressure builds to 10 to 25 pose below the header pressure
LATEST ACTUAL EXAM WITH 150 QUESTIONS AND
CORRECT VERIFIED ANSWERS |WELL GRADED A+
if you are found in violation of licensing rules, what is the first warning you will receive? -
CORRECT ANSWERS-written warning
an impulse turbine utilizes one row of stationary nozzle which increase the velocity of
the steam enough to drive two rows of rotating blades. this type of turbine is called a(n)
- CORRECT ANSWERS-velocity-compounded turbine
a steam turbine that operates at 500 psi is considered - CORRECT ANSWERS-high
pressure ( 150 psi and less is low pressure, 151-400 is medium pressure, over 400 is
high pressure)
considering the limitation on material of construction of a steam turbine, what is the
maximum temp of steam that may be used? - CORRECT ANSWERS-1100F
what is the maximum acceptable level of dissolved solids in the steam being supplied to
a steam turbine - CORRECT ANSWERS-0.1 ppm
what is the proper temp for turbine bearings during normal operation - CORRECT
ANSWERS-140-150F
the proper procedure for cleaning a turbine oil cooler is : - CORRECT ANSWERS-place
the entire tube bundle in a cleaning tank
which of the following is FALSE about required properties of lubricating oil in a turbine?
- CORRECT ANSWERS-oil must be able to mix with water
in what type of turbine lubricating oil filtration system is oil removed at intervals and
replaced with new or reconditioned oil? - CORRECT ANSWERS-makeup system
if a turbine has begin spinning and heat is being generated in the bearings at what temp
should you add cooling water to the bearings? - CORRECT ANSWERS-110-120F
what is the function of a dashpot, as part of a steam turbine governor? - CORRECT
ANSWERS-to prevent overtravel due to the weight of the governor linkage
what is the most economical way to partially load a small steam turbine? - CORRECT
ANSWERS-use the minimum number of hand-controlled steam nozzles feasble
which of the following is a yearly inspection for a steam turbine - CORRECT
ANSWERS-inspect oil and steam atomizers
, which of the following would cause vibrations in a turbine? - CORRECT ANSWERS-
improper air gap in the generator?
when a steam turbine is to be shut down, what step should be taken first? - CORRECT
ANSWERS-gradually reduce the load to zero
what is used to keep SO2 down? - CORRECT ANSWERS-wet and dry scrubbers
a wet scrubber that has been maintained properly has the capability of absorbing
______% of the SO2 in the flue gas - CORRECT ANSWERS-90%
Materials of construction of a flue gas scrubber system must be selected to resist what
hostile conditions? - CORRECT ANSWERS-low pH conditions and abrasion
the efficiency of a spray pond or cooling tower is based on? - CORRECT ANSWERS-
wet bulb temperature or relative humidity of the ambient air
when placing an induced draft cooling tower into service, which is the last step
performed? - CORRECT ANSWERS-start the i.d. fans
when operating an induced draft cooling tower, which of the following statements is
FALSE - CORRECT ANSWERS-it is more economical to operate one fan at high speed
than two fans at low speed
what condition could be prevented by keeping the pH of water greater than 7? -
CORRECT ANSWERS-corrosion
which chemical is often used to control algae accumulation in cooling towers? -
CORRECT ANSWERS-copper sulfate
(LP) what is the minimum percentage of oxygen that must be present in a confined
space before entering? - CORRECT ANSWERS-19.5%
(LP) which of the following should you not tag and lock out when a boiler is shut down
for inspection? - CORRECT ANSWERS-top tri cock or boiler vent
what is the first thing that must be done when starting up a brand new boiler? -
CORRECT ANSWERS-boil the boiler out
which of the following is not done during a boiler start up? - CORRECT ANSWERS-fill
the boiler to the NOWL
when starting a fire in a coal_fired boiler with chain grates or traveling grates, how much
coal should be on the grates? - CORRECT ANSWERS-3-4 inches
when should a non-return valve be opened when putting a boiler on line? - CORRECT
ANSWERS-when the boiler pressure builds to 10 to 25 pose below the header pressure
