boiler exam study guide 1 CORRECT QUESTIONS & ANSWERS(RATED A)
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Course
DC boiler
Institution
DC Boiler
15 psi - ANSWER A low pressure steam boiler has a maximum allowable working pressure (MAWP) of up to ___.
One boiler horsepower - ANSWER The evaporation of 34.5 lb of water/hr from and at a feedwater temperature of 212°F
through the tubes - ANSWER In a firetube boiler, the heat and gases of ...
boiler exam study guide 1 CORRECT QUESTIONS &
ANSWERS(RATED A)
15 psi - ANSWER A low pressure steam boiler has a maximum allowable working pressure (MAWP) of up
to ___.
One boiler horsepower - ANSWER The evaporation of 34.5 lb of water/hr from and at a feedwater
temperature of 212°F
through the tubes - ANSWER In a firetube boiler, the heat and gases of combustion pass ___.
in high or low pressure plants - ANSWER A firetube boiler may be used ___.
a firetube boiler - ANSWER Because of the large volume of water, the boiler most likely to cause a boiler
explosion is ___.
firetube - ANSWER A horizontal return tubular (HRT) boiler is a ___ boiler.
temperature - ANSWER As steam pressure in a boiler increases, there is a corresponding increase in the
___.
a boiler explosion - ANSWER A sudden drop in boiler steam pressure without a corresponding drop in
boiler water temperature could result in ___.
heating surface - ANSWER The part of a boiler that has the heat and gases of combustion on one side
and water on the other side is known as the ___.
thermal - ANSWER The comparison, or ratio, of heat supplied in fuel to heat absorbed by water is
defined as ___ efficiency.
, boiler heating surface - ANSWER Baffles are designed to direct the gases of combustion so that they
come into close contact with the ___.
stays - ANSWER The steam and water drum of watertube boilers is dished (concave) to eliminate the
need for ___.
waterwalls - ANSWER To increase the life of a furnace refractory, some watertube boilers are equipped
with ___.
high ceilings, less floor space, and the use of staybolts - ANSWER Vertical firetube boilers require ___.
around the tubes - ANSWER In a watertube boiler, the heat and gases of combustion pass ___.
firetube - ANSWER The ___ boiler has a large volume of water in relation to horsepower size.
a firetube boiler (high or low pressure) - ANSWER Stays and braces are needed to prevent bulging in ___.
watertube - ANSWER The ___ boiler was developed to provide steam at higher pressures.
watertube - ANSWER The mud drum is the lowest part of the water side of a(n) ___ boiler.
tensile - ANSWER Boiler plates and staybolts are subjected to ___ stress.
American Society of Mechanical Engineers (ASME) - ANSWER Safety valve connections must be approved
by the ___.
safety and efficiency - ANSWER Boiler fittings are necessary for ___.
safety valve - ANSWER The most important fitting on a boiler is the ___.
, safety valve - ANSWER To prevent failure from pressure over the MAWP, all steam boilers must be
equipped with at least one ___.
prevent the boiler from exceeding its MAWP - ANSWER A safety valve will ___.
pop open - ANSWER Safety valves are designed to ___.
before the main safety valves are set to open - ANSWER Superheater safety valves are set to open ___.
at least 75% of the popping pressure - ANSWER When testing a safety valve by hand, there must be ___.
safety valve manufacturer or manufacturer's authorized representative - ANSWER Any repairs to a safety
valve should be done by the ___.
qualified person who is familiar with the contruction and operation of a safety valve - ANSWER The
setting or adjusting of a safety valve should only be done by the ___.
an accumulation test is put on the boiler - ANSWER If it is necessary to test the relieving capacity of a
safety valve, ___.
pounds of steam per hour capable of discharging under a given pressure - ANSWER The relieving
capacity of a safety valve is measured in ___.
reduce turbulence in the gauge glass to get a more accurate reading of the water level in the boiler -
ANSWER The main purpose of a water column is to ___.
a secondary means of determining water level in a boiler. - ANSWER Try cocks are ___.
using the try cocks - ANSWER When replacing a broken gauge glass, the water level is checked by ___.
once a shift - ANSWER The water column and gauge glass should usually be blown down ___.
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