Power Engineering 4B Exam Question Bank,
Complete With 2000 Questions And Correct
Answers, Latest
d - correct answer>>>The most important rule in safe operation of a steam boiler is to
a) keep the heat transfer surfaces clean
b) maintain the boiler room log
c) try to keep make up water to a minimum
d) keep water in the boiler at the proper level
c - correct answer>>>in a multiple boiler high pressure steam plant , when starting an entire system from
cold
a) all boilers are started and warmed at the same time
b) boilers remaining off-line must have their boiler and header stop valves open, and their non-return
drain valves shut
c) the entire system warms and pressurizes as one boiler warms, except for the boilers remaining off-line
d) a small auxiliary heating boiler is used to warm the steam lines while the power boilers are warming
d - correct answer>>>deaerators often have low level alarms and low-low level trips
a) in case of boiler trips
b) in case the boiler feed water valve fails open
c) in case the boiler feed water pumps trip
d) in case the condensate transfer pumps trip
c - correct answer>>>boilers should be warmed up
a) with maximum combustion air , to prevent smoking
b) rapidly, so the metal heats up faster
,c) slowly, to minimize differential expansion and thermal shock
d) using only the pilot burner
c - correct answer>>>Before performing a try lever test on a power boiler, what pressure should the
boiler be at
a) the boiler MAWP
b) the set pressure of the safety valve
c) at least 75% of the set pressure of the safety valve
d)at or above 750kPa
c - correct answer>>>when closing up a boiler
a) handhole and manhole gaskets must be coated with a sealant, such as graphite paste or silicone
b) handhole and manhole gaskets should be reused , because they are expensive
c) new handhole and manhole gaskets must be used, to prevent major blowouts and costly unplanned
boiler outages
d) handhole and manhole yolks must be torqued until the gaskets are compressed to less than 1mm
thick
d - correct answer>>>On a semi-automatic ignition system, the switch on the supervised cock
a) shuts down the boiler if the main test firing valve is opened during operation
b) allows the boiler to automatically recycle
c) keeps the boiler from pre-purging if the test firing valve is open
d) keeps the boiler from pre-purging if the main test firing valve is open
d - correct answer>>>Failure to _______________ the furnace thoroughly before light-up can cause
furnace explosion
, a) preheat
b) soot-blow
c) cool
d) purge
d - correct answer>>>What is the recommended boiler water pH for wet layup?
a) 7
b) 7.5
c) 12
d) 10
d - correct answer>>>one cause of main flame failure in oil fired boilers is
a) excessive fuel temperature
b) Excessive purge duration
c) excessive furnace temperature
d) water in fuel
d - correct answer>>>Which of the following is NOT an important reason to take plant readings
a) to diagnose problems with equipment or processes
b) to compare current field conditions with the expected performance of the equipment
c) to identify operating trends
d) to keep operators from becoming complacent
a - correct answer>>>If the safety relief valve of a hot water heating boiler is set to open at 207kPa, the
operating pressures should not exceed
Complete With 2000 Questions And Correct
Answers, Latest
d - correct answer>>>The most important rule in safe operation of a steam boiler is to
a) keep the heat transfer surfaces clean
b) maintain the boiler room log
c) try to keep make up water to a minimum
d) keep water in the boiler at the proper level
c - correct answer>>>in a multiple boiler high pressure steam plant , when starting an entire system from
cold
a) all boilers are started and warmed at the same time
b) boilers remaining off-line must have their boiler and header stop valves open, and their non-return
drain valves shut
c) the entire system warms and pressurizes as one boiler warms, except for the boilers remaining off-line
d) a small auxiliary heating boiler is used to warm the steam lines while the power boilers are warming
d - correct answer>>>deaerators often have low level alarms and low-low level trips
a) in case of boiler trips
b) in case the boiler feed water valve fails open
c) in case the boiler feed water pumps trip
d) in case the condensate transfer pumps trip
c - correct answer>>>boilers should be warmed up
a) with maximum combustion air , to prevent smoking
b) rapidly, so the metal heats up faster
,c) slowly, to minimize differential expansion and thermal shock
d) using only the pilot burner
c - correct answer>>>Before performing a try lever test on a power boiler, what pressure should the
boiler be at
a) the boiler MAWP
b) the set pressure of the safety valve
c) at least 75% of the set pressure of the safety valve
d)at or above 750kPa
c - correct answer>>>when closing up a boiler
a) handhole and manhole gaskets must be coated with a sealant, such as graphite paste or silicone
b) handhole and manhole gaskets should be reused , because they are expensive
c) new handhole and manhole gaskets must be used, to prevent major blowouts and costly unplanned
boiler outages
d) handhole and manhole yolks must be torqued until the gaskets are compressed to less than 1mm
thick
d - correct answer>>>On a semi-automatic ignition system, the switch on the supervised cock
a) shuts down the boiler if the main test firing valve is opened during operation
b) allows the boiler to automatically recycle
c) keeps the boiler from pre-purging if the test firing valve is open
d) keeps the boiler from pre-purging if the main test firing valve is open
d - correct answer>>>Failure to _______________ the furnace thoroughly before light-up can cause
furnace explosion
, a) preheat
b) soot-blow
c) cool
d) purge
d - correct answer>>>What is the recommended boiler water pH for wet layup?
a) 7
b) 7.5
c) 12
d) 10
d - correct answer>>>one cause of main flame failure in oil fired boilers is
a) excessive fuel temperature
b) Excessive purge duration
c) excessive furnace temperature
d) water in fuel
d - correct answer>>>Which of the following is NOT an important reason to take plant readings
a) to diagnose problems with equipment or processes
b) to compare current field conditions with the expected performance of the equipment
c) to identify operating trends
d) to keep operators from becoming complacent
a - correct answer>>>If the safety relief valve of a hot water heating boiler is set to open at 207kPa, the
operating pressures should not exceed
