A low Pressure steam boiler has a MAWP of _____ psi - ANSWER 15
___ is the amount of energy equal to the evaporation of 34.5 lb of water/hr from and at a feedwater temp of 212F. - ANSWER The higher the steam pressure, the higher the ___ of the water in the boiler. - ANSWER boiling point
boile...
High Pressure Boilers 5th Edition Exams||
300 QUESTIONS & ANSWERS|| LATEST
UPDATE 2024
A low Pressure steam boiler has a MAWP of _____ psi - ANSWER 15
The higher the steam pressure, the higher the ___ of the water in the boiler. - ANSWER boiling point
___ is the amount of energy equal to the evaporation of 34.5 lb of water/hr from and at a feedwater
temp of 212F. - ANSWER boiler horsepower
When a steam boiler is operating at 100 pounds per square inch gauge pressure (psig), the temp of the
water and steam will be approx. ___F. - ANSWER 338
A horizontal return tubular (HRT) boiler is a ___ boiler. - ANSWER firetube
As steam pressure in a boiler increases, there is a corresponding increase in the ___. - ANSWER
temperature
A sudden drop in pressure from 100 psig to 0 psig without a corresponding drop in temperature could
results in a(n) ___. - ANSWER explosion
Water will boil and turn to steam when it reaches ___F at atmospheric pressure sea level. - ANSWER 212
___ efficiency is the ratio of the heat absorbed by the boiler (output) to the heat available in the fuel
(input). - ANSWER Thermal
Baffles are used to direct gases so that they come in close contact with the ___. - ANSWER boiler heating
surface
, ___ Stress is stress that occurs when two forces of equal intensity act parallel to each other but in
opposite directions - ANSWER shear stress
Some watertube boilers are equipped with ___ to increases the heating surface and the life of the
furnace refractory - ANSWER waterwalls
A disadvantage of a vertical firetube boiler is that is requires ___. - ANSWER a high ceiling
In a firetube boiler, the heat produced by gases of combustion ___. - ANSWER passes through the tubes
Watertube boilers were designed to operate at pressure as high as ___ psi, a point known as the critical
pressure of steam. - ANSWER 3206
A mud drum, if used, is the lowest part of the water side of a(n) ___ boiler. - ANSWER watertube
A ___ boiler is a watertube boiler in which replaceable serpentine tubes are connected to the upper and
lower drums and surround the firebox. - ANSWER flex-tube
In electrode electric boilers, heat is generated by electric current flowing from one electrode to another
electrode through the ___. - ANSWER boiler water
A high pressure steam boiler operates at a steam pressure over ___ psi. - ANSWER 15
A condensing economizer recovers ___ Btu/lb from the heat in the water vapor. - ANSWER 970
Boiler tubes are manufactured using materials that meet ___ specifications. - ANSWER ASME
In a watertube boiler, the heated water inside the tubes becomes ___, causing it to rise. - ANSWER less
dense
, Cogeneration produces ___ for use in a process or heating. - ANSWER hot water
A ___ is a device that converts mechanical energy into electrical energy by means of electromagnetic
induction. - ANSWER generator
___ is used to support and protect electrical conductors. - ANSWER Conduit
if the boiler is generating 20,000 lb/hr of steam, it must be supplied with ________ lb/hr of feedwater -
ANSWER 20,000
from the deaerator, oxygen and other noncondensable gases are separated from the feedwater and
directed to the atmosphere _________ - ANSWER though the vent
a(n) ___________ system is a system of measuring instruments and controllers that work together to
control a process - ANSWER control
one pound of water is needed to produce ________ of steam - ANSWER 1 lb
in a low-pressure gas system, the ________ valve is an electric valve that cannot be opened until the gas
pilot is lit - ANSWER manual reset
______ are used for loads that require dry steam, such as turbines - ANSWER superheaters
in a feedwater system, the ________ valve is located close to the shell of the boiler on the feedwater line
so that the check valve can be repaired without draining (dumping) the boiler - ANSWER stop
a steaming boiler can have the water in the gauge glass go from half full to empty in a matter of
________ if water is not added to the boiler - ANSWER minutes
in a fuel oil system, the purpose of duplex strainers is to _________. - ANSWER permit one strainer to be
cleaned while the other is in service
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