set the operating steam pressure range
the 2 scales on the boiler pressure control
accumulations of soot on heating surface boiler capacity
can lead to a decrease in
true
air is mixed with the fuel outside the
burner
the amount of natural draft is not affected false
by the height of the stack
section VI
the ASME code section for care and
operation of a hot water heating boiler
falls under
as solids add alkalinity in boiler water waterside scaling is increased
increase
gate
assuming the valves are of similar size
which one will take the longest to open
and close
a return trap
at deuce is used to obtain enough static
head for the returning condensate in two
pipe gravity return system
atmospheric pressure is equal to 14.7 psi
, maintain proper water level
the basic function of an automatic
feedwater regulator on a boiler is to:
100 horsepower
a boiler operator log must be maintained
in a boiler room containing over:
boilers are equipped with combination of more flexible operation
gas/fuel burners for
boiling water having a high water caustic embrittlement
alkalinity could develope
bottom blowdown is best performed when under light load
the boiler is
.......can lead to water hammer carryover
carryover can lead to water hammer
mechanical force and induced
cast iron section sectional boilers are built
for what type of draft firing
balanced
combinations forced and induced draft is
also known as.........draft
caustic embrittlement
cracking of the boiler can be caused by:
draft in a oiler is measured in inches of water
air or gases to flow
draft is a difference in pressure that
caused
, purging after ignition failure
a furnace explosion can be prevented by
15 psig
the high limit setting on a low pressure
steam boiler must not exceed
with push nipples and bolts
how are cast iron sectional boilers put
together
how is natural draft produced by the difference in temp of the gas in the chimney to that of air outside
all of the above: modulating motor and linkage, air damper, butterfly valve
how is the air to gas ratio maintained
within a boiler?
how is the relieving capacity of a safety lbs/hr that it is discharging
valve measured
34.5
how many pounds of steam per hour at
212 F equal one horsepower
.43
how much does a one inch square column
of water weigh if it is one foot tall
once every 24 hours
how often would you blow down a boiler
with no chemical water analysis
move it in the closed direction initially and then open the valve back to the
how should an operator operate the original position
handwheel to verify the position. of a
fully open manual valve