High Pressure Boilers 5th ed 3 exams 1-5, 12, ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
8 questions with verified solutions
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A low pressure steam boiler has a MAWP of ___ psi. - correct answer✔✔15
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The higher the steam pressure, the higher the ___ of the water in the boiler. - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
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. - correct answer✔✔one boiler horsepower ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
When a steam boiler is operating at 100 pounds per square inch gauge pressure (psig), the
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temp of the water and steam will be approx. ___F. - correct answer✔✔338
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A horizontal return tubular (HRT) boiler is a ___ boiler. - correct answer✔✔firetube
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As steam pressure in a boiler increases, there is a corresponding increase in the ___. -
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correct answer✔✔temperature ||\\//||
A sudden drop in pressure from 100 psig to 0 psig without a corresponding drop in
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
temperature could results in a(n) ___. - correct answer✔✔explosion ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Water will boil and turn to steam when it reaches ___F at atmospheric pressure sea level. -
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
correct answer✔✔212 ||\\//||
___ efficiency is the ratio of the heat absorbed by the boiler (output) to the heat available in
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
the fuel (input). - correct answer✔✔Thermal
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,Baffles are used to direct gases so that they come in close contact with the ___. - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔boiler heating surface ||\\//|| ||\\//||
Some watertube boilers are equipped with ___ to increases the heating surface and the life
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
of the furnace refractory - correct answer✔✔waterwalls
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A disadvantage of a vertical firetube boiler is that is requires ___. - correct answer✔✔a high
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ceiling
In a firetube boiler, the heat produced by gases of combustion ___. - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
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. - correct answer✔✔3206
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
A mud drum, if used, is the lowest part of the water side of a(n) ___ boiler. - correct
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answer✔✔watertube
A ___ boiler is a watertube boiler in which replaceable serpentine tubes are connected to
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the upper and lower drums and surround the firebox. - correct answer✔✔flex-tube
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In electrode electric boilers, heat is generated by electric current flowing from one electrode
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to another electrode through the ___. - correct answer✔✔boiler water
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A high pressure steam boiler operates at a steam pressure over ___ psi. - correct
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answer✔✔15
, A condensing economizer recovers ___ Btu/lb from the heat in the water vapor. - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔970
Boiler tubes are manufactured using materials that meet ___ specifications. - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔ASME
In a watertube boiler, the heated water inside the tubes becomes ___, causing it to rise. -
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correct answer✔✔less dense ||\\//|| ||\\//||
Cogeneration produces ___ for use in a process or heating. - correct answer✔✔hot water ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
A ___ is a device that converts mechanical energy into electrical energy by means of
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
electromagnetic induction. - correct answer✔✔generator ||\\//|| ||\\//|| ||\\//|| ||\\//||
___ is used to support and protect electrical conductors. - correct answer✔✔Conduit
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
From the deaerator, oxygen and other noncondensable gases are separated form the
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
feedwater and directed to the atmosphere ___. - correct answer✔✔through the vent ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
A(n) ___ system is a system of measuring instruments and controllers that work together to
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control a process. - correct answer✔✔control ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
In a low-pressure gas system, the ___ valve is an electric valve that cannot be opened until
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the gas pilot is lit. - correct answer✔✔manual reset
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___ are used for loads that require dry steam, such as turbines. - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔Superheaters, scrubbers, and separators ||\\//|| ||\\//|| ||\\//||
8 questions with verified solutions
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A low pressure steam boiler has a MAWP of ___ psi. - correct answer✔✔15
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
The higher the steam pressure, the higher the ___ of the water in the boiler. - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
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. - correct answer✔✔one 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. - correct answer✔✔338
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
A horizontal return tubular (HRT) boiler is a ___ boiler. - correct answer✔✔firetube
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
As steam pressure in a boiler increases, there is a corresponding increase in the ___. -
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
correct answer✔✔temperature ||\\//||
A sudden drop in pressure from 100 psig to 0 psig without a corresponding drop in
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
temperature could results in a(n) ___. - correct answer✔✔explosion ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Water will boil and turn to steam when it reaches ___F at atmospheric pressure sea level. -
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
correct answer✔✔212 ||\\//||
___ efficiency is the ratio of the heat absorbed by the boiler (output) to the heat available in
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
the fuel (input). - correct answer✔✔Thermal
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
,Baffles are used to direct gases so that they come in close contact with the ___. - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔boiler heating surface ||\\//|| ||\\//||
Some watertube boilers are equipped with ___ to increases the heating surface and the life
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
of the furnace refractory - correct answer✔✔waterwalls
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
A disadvantage of a vertical firetube boiler is that is requires ___. - correct answer✔✔a high
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
ceiling
In a firetube boiler, the heat produced by gases of combustion ___. - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
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. - correct answer✔✔3206
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
A mud drum, if used, is the lowest part of the water side of a(n) ___ boiler. - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
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. - correct answer✔✔flex-tube
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
In electrode electric boilers, heat is generated by electric current flowing from one electrode
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
to another electrode through the ___. - correct answer✔✔boiler water
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
A high pressure steam boiler operates at a steam pressure over ___ psi. - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔15
, A condensing economizer recovers ___ Btu/lb from the heat in the water vapor. - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔970
Boiler tubes are manufactured using materials that meet ___ specifications. - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔ASME
In a watertube boiler, the heated water inside the tubes becomes ___, causing it to rise. -
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
correct answer✔✔less dense ||\\//|| ||\\//||
Cogeneration produces ___ for use in a process or heating. - correct answer✔✔hot water ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
A ___ is a device that converts mechanical energy into electrical energy by means of
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
electromagnetic induction. - correct answer✔✔generator ||\\//|| ||\\//|| ||\\//|| ||\\//||
___ is used to support and protect electrical conductors. - correct answer✔✔Conduit
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
From the deaerator, oxygen and other noncondensable gases are separated form the
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
feedwater and directed to the atmosphere ___. - correct answer✔✔through the vent ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
A(n) ___ system is a system of measuring instruments and controllers that work together to
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
control a process. - correct answer✔✔control ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
In a low-pressure gas system, the ___ valve is an electric valve that cannot be opened until
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
the gas pilot is lit. - correct answer✔✔manual reset
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
___ are used for loads that require dry steam, such as turbines. - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔Superheaters, scrubbers, and separators ||\\//|| ||\\//|| ||\\//||
